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Yang D, Li C, Kong Y, Pei Y, Miao B, Dai G, Ding P, Shi P, Wang Z, Pei R. Deciphering the Temporal-Spatial Interactive Heterogeneity of Long Non-Coding RNAs and RNA-Binding Proteins in Living Cells at Single-Cell Resolution. J Am Chem Soc 2024. [PMID: 39016781 DOI: 10.1021/jacs.4c05205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
The investigation of long noncoding RNAs (lncRNAs) and RNA binding proteins (RBPs) interactions in living cell holds great significance for elucidating their critical roles in a variety of biological activities, but limited techniques are available to profile the temporal-spatial dynamic heterogeneity. Here, we introduced a molecular beacon-functionalized nanoneedle array designed for spatially resolved profiling of lncRNA-RBP interactions (Nano-SpatiaLR). A nanoneedle array modified with a molecular beacon is employed to selectively isolate specific intracellular lncRNAs and their associated RBPs without affecting cell viability. The RBPs are then in situ analyzed with a fluorescent labeled antibody and colocalized with lncRNA signals to get a quantitative measurement of their dynamic interactions. Additionally, leveraging the spatial distribution and nanoscale modality of the nanoneedle array, this technique provides the spatial heterogeneity information on cellular lncRNA-RBPs interaction at single cell resolution. In this study, we tracked the temporal-spatial interactive heterogeneity dynamics of lncRNA-RBPs interaction within living cells across different biological progresses. Our findings demonstrated that the interactions between lncRNA HOTAIR and RBPs EZH2 and LSD1 undergo significant changes in response to drug treatments, particularly in tumor cells. Moreover, these interactions become more intensified as tumor cells aggregate during the proliferation process.
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Affiliation(s)
- Deyuan Yang
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Cheng Li
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Yutong Kong
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Yian Pei
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- Duke Kunshan University Kunshan 215316, China
| | - Bing Miao
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Gaole Dai
- Suzhou Institute of Systems Medicine, Suzhou 215123, China
| | - Pi Ding
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Peng Shi
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering, Hong Kong Science Park, Shatin, Hong Kong 999077, China
- Department of Biomedical Engineering, City University of Hong Kong Kowloon, Shatin, Hong Kong 999077, China
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China
| | - Zixun Wang
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Renjun Pei
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
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2
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Ross SJ, Hume AJ, Olejnik J, Turcinovic J, Honko AN, McKay LGA, Connor JH, Griffiths A, Mühlberger E, Cifuentes D. Low-Input, High-Resolution 5' Terminal Filovirus RNA Sequencing with ViBE-Seq. Viruses 2024; 16:1064. [PMID: 39066227 PMCID: PMC11281615 DOI: 10.3390/v16071064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/14/2024] [Accepted: 06/27/2024] [Indexed: 07/28/2024] Open
Abstract
Although next-generation sequencing (NGS) has been instrumental in determining the genomic sequences of emerging RNA viruses, de novo sequence determination often lacks sufficient coverage of the 5' and 3' ends of the viral genomes. Since the genome ends of RNA viruses contain the transcription and genome replication promoters that are essential for viral propagation, a lack of terminal sequence information hinders the efforts to study the replication and transcription mechanisms of emerging and re-emerging viruses. To circumvent this, we have developed a novel method termed ViBE-Seq (Viral Bona Fide End Sequencing) for the high-resolution sequencing of filoviral genome ends using a simple yet robust protocol with high fidelity. This technique allows for sequence determination of the 5' end of viral RNA genomes and mRNAs with as little as 50 ng of total RNA. Using the Ebola virus and Marburg virus as prototypes for highly pathogenic, re-emerging viruses, we show that ViBE-Seq is a reliable technique for rapid and accurate 5' end sequencing of filovirus RNA sourced from virions, infected cells, and tissue obtained from infected animals. We also show that ViBE-Seq can be used to determine whether distinct reverse transcriptases have terminal deoxynucleotidyl transferase activity. Overall, ViBE-Seq will facilitate the access to complete sequences of emerging viruses.
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Affiliation(s)
- Stephen J. Ross
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
- Department of Biochemistry & Cell Biology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA
| | - Adam J. Hume
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - Judith Olejnik
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - Jacquelyn Turcinovic
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - Anna N. Honko
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - Lindsay G. A. McKay
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - John H. Connor
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - Anthony Griffiths
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - Elke Mühlberger
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- National Emerging Infectious Diseases Laboratories, Boston University, Boston, MA 02215, USA
| | - Daniel Cifuentes
- Department of Virology, Immunology & Microbiology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA; (S.J.R.); (A.J.H.); (J.O.); (J.T.); (A.N.H.); (L.G.A.M.); (J.H.C.); (A.G.)
- Department of Biochemistry & Cell Biology, Chobanian and Avedisian School of Medicine, Boston University, Boston, MA 02215, USA
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Klein P, Petrić Howe M, Harley J, Crook H, Esteban Serna S, Roumeliotis TI, Choudhary JS, Chakrabarti AM, Luisier R, Patani R, Ramos A. m6a methylation orchestrates IMP1 regulation of microtubules during human neuronal differentiation. Nat Commun 2024; 15:4819. [PMID: 38844464 PMCID: PMC11156911 DOI: 10.1038/s41467-024-49139-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 05/21/2024] [Indexed: 06/09/2024] Open
Abstract
Neuronal differentiation requires building a complex intracellular architecture, and therefore the coordinated regulation of defined sets of genes. RNA-binding proteins (RBPs) play a key role in this regulation. However, while their action on individual mRNAs has been explored in depth, the mechanisms used to coordinate gene expression programs shaping neuronal morphology are poorly understood. To address this, we studied how the paradigmatic RBP IMP1 (IGF2BP1), an essential developmental factor, selects and regulates its RNA targets during the human neuronal differentiation. We perform a combination of system-wide and molecular analyses, revealing that IMP1 developmentally transitions to and directly regulates the expression of mRNAs encoding essential regulators of the microtubule network, a key component of neuronal morphology. Furthermore, we show that m6A methylation drives the selection of specific IMP1 mRNA targets and their protein expression during the developmental transition from neural precursors to neurons, providing a molecular principle for the onset of target selectivity.
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Affiliation(s)
- Pierre Klein
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6XA, UK
- Human Stem Cells and Neurodegeneration Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Marija Petrić Howe
- Human Stem Cells and Neurodegeneration Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Jasmine Harley
- Human Stem Cells and Neurodegeneration Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Harry Crook
- Human Stem Cells and Neurodegeneration Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Sofia Esteban Serna
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6XA, UK
| | - Theodoros I Roumeliotis
- Functional Proteomics team, The Institute of Cancer Research, 237 Fulham Road, London, SW3 6JB, UK
| | - Jyoti S Choudhary
- Functional Proteomics team, The Institute of Cancer Research, 237 Fulham Road, London, SW3 6JB, UK
| | - Anob M Chakrabarti
- RNA Networks Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Raphaëlle Luisier
- Idiap Research Institute, Martigny, 1920, Switzerland
- SIB Swiss Institute of Bioinformatics, Lausanne, 1015, Switzerland
| | - Rickie Patani
- Human Stem Cells and Neurodegeneration Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
- Department of Neuromuscular Diseases, Queen Square Institute of Neurology, University College London, London, WC1N 3BG, UK.
| | - Andres Ramos
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6XA, UK.
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4
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Yang S, Kim SH, Yang E, Kang M, Joo JY. Molecular insights into regulatory RNAs in the cellular machinery. Exp Mol Med 2024; 56:1235-1249. [PMID: 38871819 PMCID: PMC11263585 DOI: 10.1038/s12276-024-01239-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/27/2024] [Accepted: 03/05/2024] [Indexed: 06/15/2024] Open
Abstract
It is apparent that various functional units within the cellular machinery are derived from RNAs. The evolution of sequencing techniques has resulted in significant insights into approaches for transcriptome studies. Organisms utilize RNA to govern cellular systems, and a heterogeneous class of RNAs is involved in regulatory functions. In particular, regulatory RNAs are increasingly recognized to participate in intricately functioning machinery across almost all levels of biological systems. These systems include those mediating chromatin arrangement, transcription, suborganelle stabilization, and posttranscriptional modifications. Any class of RNA exhibiting regulatory activity can be termed a class of regulatory RNA and is typically represented by noncoding RNAs, which constitute a substantial portion of the genome. These RNAs function based on the principle of structural changes through cis and/or trans regulation to facilitate mutual RNA‒RNA, RNA‒DNA, and RNA‒protein interactions. It has not been clearly elucidated whether regulatory RNAs identified through deep sequencing actually function in the anticipated mechanisms. This review addresses the dominant properties of regulatory RNAs at various layers of the cellular machinery and covers regulatory activities, structural dynamics, modifications, associated molecules, and further challenges related to therapeutics and deep learning.
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Affiliation(s)
- Sumin Yang
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea
| | - Sung-Hyun Kim
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea
| | - Eunjeong Yang
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea
| | - Mingon Kang
- Department of Computer Science, University of Nevada, Las Vegas, NV, 89154, USA
| | - Jae-Yeol Joo
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea.
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5
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Ni Z, Ahmed N, Nabeel-Shah S, Guo X, Pu S, Song J, Marcon E, Burke G, Tong AH, Chan K, Ha KH, Blencowe B, Moffat J, Greenblatt J. Identifying human pre-mRNA cleavage and polyadenylation factors by genome-wide CRISPR screens using a dual fluorescence readthrough reporter. Nucleic Acids Res 2024; 52:4483-4501. [PMID: 38587191 PMCID: PMC11077057 DOI: 10.1093/nar/gkae240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 01/29/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024] Open
Abstract
Messenger RNA precursors (pre-mRNA) generally undergo 3' end processing by cleavage and polyadenylation (CPA), which is specified by a polyadenylation site (PAS) and adjacent RNA sequences and regulated by a large variety of core and auxiliary CPA factors. To date, most of the human CPA factors have been discovered through biochemical and proteomic studies. However, genetic identification of the human CPA factors has been hampered by the lack of a reliable genome-wide screening method. We describe here a dual fluorescence readthrough reporter system with a PAS inserted between two fluorescent reporters. This system enables measurement of the efficiency of 3' end processing in living cells. Using this system in combination with a human genome-wide CRISPR/Cas9 library, we conducted a screen for CPA factors. The screens identified most components of the known core CPA complexes and other known CPA factors. The screens also identified CCNK/CDK12 as a potential core CPA factor, and RPRD1B as a CPA factor that binds RNA and regulates the release of RNA polymerase II at the 3' ends of genes. Thus, this dual fluorescence reporter coupled with CRISPR/Cas9 screens reliably identifies bona fide CPA factors and provides a platform for investigating the requirements for CPA in various contexts.
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Affiliation(s)
- Zuyao Ni
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
| | - Nujhat Ahmed
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
| | - Syed Nabeel-Shah
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
| | - Xinghua Guo
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
| | - Shuye Pu
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
| | - Jingwen Song
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
| | - Edyta Marcon
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
| | - Giovanni L Burke
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
| | - Amy Hin Yan Tong
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON Canada
| | - Katherine Chan
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON Canada
| | - Kevin C H Ha
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
| | - Benjamin J Blencowe
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
| | - Jason Moffat
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON Canada
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON Canada
| | - Jack F Greenblatt
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, ON M5A 1A8, Canada
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Lerra L, Panatta M, Bär D, Zanini I, Tan JY, Pisano A, Mungo C, Baroux C, Panse VG, Marques AC, Santoro R. An RNA-dependent and phase-separated active subnuclear compartment safeguards repressive chromatin domains. Mol Cell 2024; 84:1667-1683.e10. [PMID: 38599210 PMCID: PMC11065421 DOI: 10.1016/j.molcel.2024.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 10/19/2023] [Accepted: 03/16/2024] [Indexed: 04/12/2024]
Abstract
The nucleus is composed of functionally distinct membraneless compartments that undergo phase separation (PS). However, whether different subnuclear compartments are connected remains elusive. We identified a type of nuclear body with PS features composed of BAZ2A that associates with active chromatin. BAZ2A bodies depend on RNA transcription and BAZ2A non-disordered RNA-binding TAM domain. Although BAZ2A and H3K27me3 occupancies anticorrelate in the linear genome, in the nuclear space, BAZ2A bodies contact H3K27me3 bodies. BAZ2A-body disruption promotes BAZ2A invasion into H3K27me3 domains, causing H3K27me3-body loss and gene upregulation. Weak BAZ2A-RNA interactions, such as with nascent transcripts, promote BAZ2A bodies, whereas the strong binder long non-coding RNA (lncRNA) Malat1 impairs them while mediating BAZ2A association to chromatin at nuclear speckles. In addition to unraveling a direct connection between nuclear active and repressive compartments through PS mechanisms, the results also showed that the strength of RNA-protein interactions regulates this process, contributing to nuclear organization and the regulation of chromatin and gene expression.
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Affiliation(s)
- Luigi Lerra
- Department of Molecular Mechanisms of Disease (DMMD), University of Zurich, Zurich 8057, Switzerland; RNA Biology Program, Life Science Zurich Graduate School, University of Zurich, Zurich 8057, Switzerland
| | - Martina Panatta
- Department of Molecular Mechanisms of Disease (DMMD), University of Zurich, Zurich 8057, Switzerland; RNA Biology Program, Life Science Zurich Graduate School, University of Zurich, Zurich 8057, Switzerland
| | - Dominik Bär
- Department of Molecular Mechanisms of Disease (DMMD), University of Zurich, Zurich 8057, Switzerland
| | - Isabella Zanini
- Department of Molecular Mechanisms of Disease (DMMD), University of Zurich, Zurich 8057, Switzerland
| | - Jennifer Yihong Tan
- Department of Computational Biology, University of Lausanne, Lausanne 1015, Switzerland
| | - Agnese Pisano
- Institute of Medical Microbiology, University of Zurich, Zurich 8057, Switzerland
| | - Chiara Mungo
- Department of Molecular Mechanisms of Disease (DMMD), University of Zurich, Zurich 8057, Switzerland; Molecular Life Science Program, Life Science Zurich Graduate School, University of Zurich, Zurich 8057, Switzerland
| | - Célia Baroux
- Department of Plant and Microbial Biology and Zurich-Basel Plant Science Center, University of Zurich, Zurich 8057, Switzerland
| | - Vikram Govind Panse
- Institute of Medical Microbiology, University of Zurich, Zurich 8057, Switzerland
| | - Ana C Marques
- Department of Computational Biology, University of Lausanne, Lausanne 1015, Switzerland
| | - Raffaella Santoro
- Department of Molecular Mechanisms of Disease (DMMD), University of Zurich, Zurich 8057, Switzerland.
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7
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Shen Z, Naveed M, Bao J. Untacking small RNA profiling and RNA fragment footprinting: Approaches and challenges in library construction. WILEY INTERDISCIPLINARY REVIEWS. RNA 2024; 15:e1852. [PMID: 38715192 DOI: 10.1002/wrna.1852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/09/2024] [Accepted: 04/10/2024] [Indexed: 06/06/2024]
Abstract
Small RNAs (sRNAs) with sizes ranging from 15 to 50 nucleotides (nt) are critical regulators of gene expression control. Prior studies have shown that sRNAs are involved in a broad range of biological processes, such as organ development, tumorigenesis, and epigenomic regulation; however, emerging evidence unveils a hidden layer of diversity and complexity of endogenously encoded sRNAs profile in eukaryotic organisms, including novel types of sRNAs and the previously unknown post-transcriptional RNA modifications. This underscores the importance for accurate, unbiased detection of sRNAs in various cellular contexts. A multitude of high-throughput methods based on next-generation sequencing (NGS) are developed to decipher the sRNA expression and their modifications. Nonetheless, distinct from mRNA sequencing, the data from sRNA sequencing suffer frequent inconsistencies and high variations emanating from the adapter contaminations and RNA modifications, which overall skew the sRNA libraries. Here, we summarize the sRNA-sequencing approaches, and discuss the considerations and challenges for the strategies and methods of sRNA library construction. The pros and cons of sRNA sequencing have significant implications for implementing RNA fragment footprinting approaches, including CLIP-seq and Ribo-seq. We envision that this review can inspire novel improvements in small RNA sequencing and RNA fragment footprinting in future. This article is categorized under: RNA Evolution and Genomics > Computational Analyses of RNA RNA Processing > Processing of Small RNAs Regulatory RNAs/RNAi/Riboswitches > Biogenesis of Effector Small RNAs.
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Affiliation(s)
- Zhaokang Shen
- Department of Obstetrics and Gynecology, Center for Reproduction and Genetics, The First Affiliated Hospital of USTC, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Hefei National Laboratory for Physical Sciences at Microscale, Biomedical Sciences and Health Laboratory of Anhui Province, University of Science and Technology of China (USTC), Hefei, Anhui, China
| | - Muhammad Naveed
- Hefei National Laboratory for Physical Sciences at Microscale, Biomedical Sciences and Health Laboratory of Anhui Province, University of Science and Technology of China (USTC), Hefei, Anhui, China
- Department of Obstetrics and Gynecology, Center for Reproduction and Genetics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Jianqiang Bao
- Department of Obstetrics and Gynecology, Center for Reproduction and Genetics, The First Affiliated Hospital of USTC, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Hefei National Laboratory for Physical Sciences at Microscale, Biomedical Sciences and Health Laboratory of Anhui Province, University of Science and Technology of China (USTC), Hefei, Anhui, China
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8
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Monti M, Herman R, Mancini L, Capitanchik C, Davey K, Dawson CS, Ule J, Thomas GH, Willis AE, Lilley KS, Villanueva E. Interrogation of RNA-protein interaction dynamics in bacterial growth. Mol Syst Biol 2024; 20:573-589. [PMID: 38531971 PMCID: PMC11066096 DOI: 10.1038/s44320-024-00031-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 03/08/2024] [Accepted: 03/11/2024] [Indexed: 03/28/2024] Open
Abstract
Characterising RNA-protein interaction dynamics is fundamental to understand how bacteria respond to their environment. In this study, we have analysed the dynamics of 91% of the Escherichia coli expressed proteome and the RNA-interaction properties of 271 RNA-binding proteins (RBPs) at different growth phases. We find that 68% of RBPs differentially bind RNA across growth phases and characterise 17 previously unannotated proteins as bacterial RBPs including YfiF, a ncRNA-binding protein. While these new RBPs are mostly present in Proteobacteria, two of them are orthologs of human mitochondrial proteins associated with rare metabolic disorders. Moreover, we reveal novel RBP functions for proteins such as the chaperone HtpG, a new stationary phase tRNA-binding protein. For the first time, the dynamics of the bacterial RBPome have been interrogated, showcasing how this approach can reveal the function of uncharacterised proteins and identify critical RNA-protein interactions for cell growth which could inform new antimicrobial therapies.
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Affiliation(s)
- Mie Monti
- MRC Toxicology Unit, University of Cambridge, University of Cambridge, CB2 1QR, Cambridge, UK
| | - Reyme Herman
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Leonardo Mancini
- Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK
- Department of Biochemistry, University of Cambridge, Cambridge, CB2 1QW, UK
| | - Charlotte Capitanchik
- The Francis Crick Institute, 1 Midland Rd, London, NW1 1AT, UK
- UK Dementia Research Institute at King's College London, The Wohl, 5 Cutcombe Road, London, SE5 9RX, UK
| | - Karen Davey
- The Francis Crick Institute, 1 Midland Rd, London, NW1 1AT, UK
- UK Dementia Research Institute at King's College London, The Wohl, 5 Cutcombe Road, London, SE5 9RX, UK
| | - Charlotte S Dawson
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, CB2 1QR, Cambridge, UK
| | - Jernej Ule
- The Francis Crick Institute, 1 Midland Rd, London, NW1 1AT, UK
- UK Dementia Research Institute at King's College London, The Wohl, 5 Cutcombe Road, London, SE5 9RX, UK
| | - Gavin H Thomas
- Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK
| | - Anne E Willis
- MRC Toxicology Unit, University of Cambridge, University of Cambridge, CB2 1QR, Cambridge, UK.
| | - Kathryn S Lilley
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, CB2 1QR, Cambridge, UK.
| | - Eneko Villanueva
- Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, CB2 1QR, Cambridge, UK.
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9
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Feichtner A, Enzler F, Kugler V, Hoppe K, Mair S, Kremser L, Lindner H, Huber RG, Stelzl U, Stefan E, Torres-Quesada O. Phosphorylation of the compartmentalized PKA substrate TAF15 regulates RNA-protein interactions. Cell Mol Life Sci 2024; 81:162. [PMID: 38568213 PMCID: PMC10991009 DOI: 10.1007/s00018-024-05204-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 03/08/2024] [Accepted: 03/09/2024] [Indexed: 04/05/2024]
Abstract
Spatiotemporal-controlled second messengers alter molecular interactions of central signaling nodes for ensuring physiological signal transmission. One prototypical second messenger molecule which modulates kinase signal transmission is the cyclic-adenosine monophosphate (cAMP). The main proteinogenic cellular effectors of cAMP are compartmentalized protein kinase A (PKA) complexes. Their cell-type specific compositions precisely coordinate substrate phosphorylation and proper signal propagation which is indispensable for numerous cell-type specific functions. Here we present evidence that TAF15, which is implicated in the etiology of amyotrophic lateral sclerosis, represents a novel nuclear PKA substrate. In cross-linking and immunoprecipitation experiments (iCLIP) we showed that TAF15 phosphorylation alters the binding to target transcripts related to mRNA maturation, splicing and protein-binding related functions. TAF15 appears to be one of multiple PKA substrates that undergo RNA-binding dynamics upon phosphorylation. We observed that the activation of the cAMP-PKA signaling axis caused a change in the composition of a collection of RNA species that interact with TAF15. This observation appears to be a broader principle in the regulation of molecular interactions, as we identified a significant enrichment of RNA-binding proteins within endogenous PKA complexes. We assume that phosphorylation of RNA-binding domains adds another layer of regulation to binary protein-RNAs interactions with consequences to RNA features including binding specificities, localization, abundance and composition.
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Affiliation(s)
- Andreas Feichtner
- Tyrolean Cancer Research Institute (TKFI), Innrain 66, 6020, Innsbruck, Austria
- Institute of Molecular Biology and Center for Molecular Biosciences, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria
| | - Florian Enzler
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, Innrain 66/66a, 6020, Innsbruck, Austria
| | - Valentina Kugler
- Tyrolean Cancer Research Institute (TKFI), Innrain 66, 6020, Innsbruck, Austria
- Institute of Molecular Biology and Center for Molecular Biosciences, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria
| | - Katharina Hoppe
- Institute of Developmental Immunology, Biocenter, Medical University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Sophia Mair
- Department of Cardiac Surgery, Medical University of Innsbruck, Innrain 66/66a, 6020, Innsbruck, Austria
- Vascage, Center of Clinical Stroke Research, 6020, Innsbruck, Austria
| | - Leopold Kremser
- Division of Clinical Biochemistry, Biocenter, Medical University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Herbert Lindner
- Division of Clinical Biochemistry, Biocenter, Medical University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Roland G Huber
- Bioinformatics Institute, Agency for Science Technology and Research, Singapore, 138671, Singapore
| | - Ulrich Stelzl
- Institute of Pharmaceutical Sciences, University of Graz, Schubertstrasse 1, 8010, Graz, Austria
| | - Eduard Stefan
- Tyrolean Cancer Research Institute (TKFI), Innrain 66, 6020, Innsbruck, Austria.
- Institute of Molecular Biology and Center for Molecular Biosciences, University of Innsbruck, Technikerstrasse 25, 6020, Innsbruck, Austria.
| | - Omar Torres-Quesada
- Tyrolean Cancer Research Institute (TKFI), Innrain 66, 6020, Innsbruck, Austria.
- Division of Medical Biochemistry, Biocenter, Medical University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria.
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10
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Lewinski M, Brüggemann M, Köster T, Reichel M, Bergelt T, Meyer K, König J, Zarnack K, Staiger D. Mapping protein-RNA binding in plants with individual-nucleotide-resolution UV cross-linking and immunoprecipitation (plant iCLIP2). Nat Protoc 2024; 19:1183-1234. [PMID: 38278964 DOI: 10.1038/s41596-023-00935-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/20/2023] [Indexed: 01/28/2024]
Abstract
Despite crucial roles of RNA-binding proteins (RBPs) in plant physiology and development, methods for determining their transcriptome-wide binding landscape are less developed than those used in other model organisms. Cross-linking and immunoprecipitation (CLIP) methods (based on UV-mediated generation of covalent bonds between RNAs and cognate RBPs in vivo, purification of the cross-linked complexes and identification of the co-purified RNAs by high-throughput sequencing) have been applied mainly in mammalian cells growing in monolayers or in translucent tissue. We have developed plant iCLIP2, an efficient protocol for performing individual-nucleotide-resolution CLIP (iCLIP) in plants, tailored to overcome the experimental hurdles posed by plant tissue. We optimized the UV dosage to efficiently cross-link RNA and proteins in plants and expressed epitope-tagged RBPs under the control of their native promoters in loss-of-function mutants. We select epitopes for which nanobodies are available, allowing stringent conditions for immunopurification of the RNA-protein complexes to be established. To overcome the inherently high RNase content of plant cells, RNase inhibitors are added and the limited RNA fragmentation step is modified. We combine the optimized isolation of RBP-bound RNAs with iCLIP2, a streamlined protocol that greatly enhances the efficiency of library preparation for high-throughput sequencing. Plant researchers with experience in molecular biology and handling of RNA can complete this iCLIP2 protocol in ~5 d. Finally, we describe a bioinformatics workflow to determine targets of Arabidopsis RBPs from iCLIP data, covering all steps from downloading sequencing reads to identifying cross-linking events ( https://github.com/malewins/Plant-iCLIPseq ), and present the R/Bioconductor package BindingSiteFinder to extract reproducible binding sites ( https://bioconductor.org/packages/release/bioc/html/BindingSiteFinder.html ).
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Affiliation(s)
- Martin Lewinski
- RNA Biology and Molecular Physiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Mirko Brüggemann
- Buchmann Institute for Molecular Life Sciences (BMLS) & Institute of Molecular Biosciences, Goethe University Frankfurt, Frankfurt, Germany
| | - Tino Köster
- RNA Biology and Molecular Physiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Marlene Reichel
- RNA Biology and Molecular Physiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Thorsten Bergelt
- RNA Biology and Molecular Physiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Katja Meyer
- RNA Biology and Molecular Physiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Julian König
- Institute of Molecular Biology (IMB), Mainz, Germany
| | - Kathi Zarnack
- Buchmann Institute for Molecular Life Sciences (BMLS) & Institute of Molecular Biosciences, Goethe University Frankfurt, Frankfurt, Germany
| | - Dorothee Staiger
- RNA Biology and Molecular Physiology, Faculty of Biology, Bielefeld University, Bielefeld, Germany.
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11
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Fan S, Zhang Y, Zhu S, Shen L. Plant RNA-binding proteins: Phase separation dynamics and functional mechanisms underlying plant development and stress responses. MOLECULAR PLANT 2024; 17:531-551. [PMID: 38419328 DOI: 10.1016/j.molp.2024.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/19/2024] [Accepted: 02/26/2024] [Indexed: 03/02/2024]
Abstract
RNA-binding proteins (RBPs) accompany RNA from synthesis to decay, mediating every aspect of RNA metabolism and impacting diverse cellular and developmental processes in eukaryotes. Many RBPs undergo phase separation along with their bound RNA to form and function in dynamic membraneless biomolecular condensates for spatiotemporal coordination or regulation of RNA metabolism. Increasing evidence suggests that phase-separating RBPs with RNA-binding domains and intrinsically disordered regions play important roles in plant development and stress adaptation. Here, we summarize the current knowledge about how dynamic partitioning of RBPs into condensates controls plant development and enables sensing of experimental changes to confer growth plasticity under stress conditions, with a focus on the dynamics and functional mechanisms of RBP-rich nuclear condensates and cytoplasmic granules in mediating RNA metabolism. We also discuss roles of multiple factors, such as environmental signals, protein modifications, and N6-methyladenosine RNA methylation, in modulating the phase separation behaviors of RBPs, and highlight the prospects and challenges for future research on phase-separating RBPs in crops.
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Affiliation(s)
- Sheng Fan
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, 1 Research Link, Singapore 117604, Singapore
| | - Yu Zhang
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, 1 Research Link, Singapore 117604, Singapore
| | - Shaobo Zhu
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, 1 Research Link, Singapore 117604, Singapore
| | - Lisha Shen
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, 1 Research Link, Singapore 117604, Singapore; Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore.
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12
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Ipas H, Gouws EB, Abell NS, Chiou PC, Devanathan SK, Hervé S, Lee S, Mercado M, Reinsborough C, Halabelian L, Arrowsmith CH, Xhemalçe B. ChemRAP uncovers specific mRNA translation regulation via RNA 5' phospho-methylation. EMBO Rep 2024; 25:1570-1588. [PMID: 38263329 PMCID: PMC10933402 DOI: 10.1038/s44319-024-00059-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/20/2023] [Accepted: 01/03/2024] [Indexed: 01/25/2024] Open
Abstract
5'-end modifications play key roles in determining RNA fates. Phospho-methylation is a noncanonical cap occurring on either 5'-PPP or 5'-P ends. We used ChemRAP, in which affinity purification of cellular proteins with chemically synthesized modified RNAs is coupled to quantitative proteomics, to identify 5'-Pme "readers". We show that 5'-Pme is directly recognized by EPRS, the central subunit of the multisynthetase complex (MSC), through its linker domain, which has previously been involved in key noncanonical EPRS and MSC functions. We further determine that the 5'-Pme writer BCDIN3D regulates the binding of EPRS to specific mRNAs, either at coding regions rich in MSC codons, or around start codons. In the case of LRPPRC (leucine-rich pentatricopeptide repeat containing), a nuclear-encoded mitochondrial protein associated with the French Canadian Leigh syndrome, BCDIN3D deficiency abolishes binding of EPRS around its mRNA start codon, increases its translation but ultimately results in LRPPRC mislocalization. Overall, our results suggest that BCDIN3D may regulate the translation of specific mRNA via RNA-5'-Pme.
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Affiliation(s)
- Hélène Ipas
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Ellen B Gouws
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Nathan S Abell
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Po-Chin Chiou
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Sravan K Devanathan
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Solène Hervé
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Sidae Lee
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Marvin Mercado
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Calder Reinsborough
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA
| | - Levon Halabelian
- Structural Genomics Consortium, and Princess Margaret Cancer Centre, University of Toronto, Toronto, ON, M5G 2M9, Canada
| | - Cheryl H Arrowsmith
- Structural Genomics Consortium, and Princess Margaret Cancer Centre, University of Toronto, Toronto, ON, M5G 2M9, Canada
| | - Blerta Xhemalçe
- Department of Molecular Biosciences, University of Texas at Austin, 2500 Speedway, 78712, Austin, TX, USA.
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13
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Lee YJ, Rio DC. A mutation in the low-complexity domain of splicing factor hnRNPA1 linked to amyotrophic lateral sclerosis disrupts distinct neuronal RNA splicing networks. Genes Dev 2024; 38:11-30. [PMID: 38182429 PMCID: PMC10903937 DOI: 10.1101/gad.351104.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 12/14/2023] [Indexed: 01/07/2024]
Abstract
Amyotrophic lateral sclerosis (ALS) is a debilitating neurodegenerative disease characterized by loss of motor neurons. Human genetic studies have linked mutations in RNA-binding proteins as causative for this disease. The hnRNPA1 protein, a known pre-mRNA splicing factor, is mutated in some ALS patients. Here, two human cell models were generated to investigate how a mutation in the C-terminal low-complexity domain (LCD) of hnRNPA1 can cause splicing changes of thousands of transcripts that collectively are linked to the DNA damage response, cilium organization, and translation. We show that the hnRNPA1 D262V mutant protein binds to new binding sites on differentially spliced transcripts from genes that are linked to ALS. We demonstrate that this ALS-linked hnRNPA1 mutation alters normal RNA-dependent protein-protein interactions. Furthermore, cells expressing this hnRNPA1 mutant exhibit a cell aggregation phenotype, markedly reduced growth rates, changes in stress granule kinetics, and aberrant growth of neuronal processes. This study provides insight into how a single amino acid mutation in a splicing factor can alter RNA splicing networks of genes linked to ALS.
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Affiliation(s)
- Yeon J Lee
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, California 94720, USA
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, California 94720, USA
| | - Donald C Rio
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, California 94720, USA;
- California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, California 94720, USA
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14
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Ray M, Zaborowsky J, Mahableshwarkar P, Vaidyanathan S, Shum J, Viswanathan R, Huang A, Wang SH, Johnson V, Wake N, Conard AM, Conicella AE, Puterbaugh R, Fawzi NL, Larschan E. Dual DNA/RNA-binding factor regulates dynamics of hnRNP splicing condensates. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.11.575216. [PMID: 38260450 PMCID: PMC10802580 DOI: 10.1101/2024.01.11.575216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Despite decades of research, mechanisms by which co-transcriptional alternative splicing events are targeted to the correct genomic locations to drive cell fate decisions remain unknown. By combining structural and molecular approaches, we define a new mechanism by which an essential transcription factor (TF) targets co-transcriptional splicing through physical and functional interaction with RNA and RNA binding proteins (RBPs). We show that an essential TF co-transcriptionally regulates sex-specific alternative splicing by directly interacting with a subset of target RNAs on chromatin and modulating the dynamics of hnRNPA2 homolog nuclear splicing condensates.
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15
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Gan H, Zhou X, Lei Q, Wu L, Niu J, Zheng Q. RNA-dependent RNA polymerase of SARS-CoV-2 regulate host mRNA translation efficiency by hijacking eEF1A factors. Biochim Biophys Acta Mol Basis Dis 2024; 1870:166871. [PMID: 37673357 DOI: 10.1016/j.bbadis.2023.166871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 08/20/2023] [Accepted: 08/31/2023] [Indexed: 09/08/2023]
Abstract
The RNA-dependent RNA polymerase (NSP12) of COVID-19 plays a significant role in the viral infection process, which promotes viral RNA replication by cooperating with NSP7 and NSP8, but little is known about its regulation on the function of host cells. We firstly found that overexpression of NSP12 had little effect on host mRNAs transcription. Using iCLIP technology, we found that NSP12 can bind a series of host RNAs with the conserved binding motif G(C/A/G)(U/G/A)UAG, especially ribosomal RNA. We found that NSP12 could directly bind to eEF1A factor via the NIRAN domain of NSP12 and N-terminal domain of eEF1A. NSP12 colocalized with eEF1A to inhibit type I interferon expression upon virus infection. In order to prove that NSP12 regulates the translation level of host cells, we found that NSP12 significantly affected the translation efficiency of many host mRNAs (such as ISG15, NF-κB2, ILK and SERPINI2) via ribosome profiling experiment, and the genes with significant upregulation in translation efficiency were mainly enriched in positive regulation of ubiquitin-dependent proteasomal process and NIK/NF-κB signaling pathway (such as NF-κB2, ILK), and negative regulation of type I interferon production, protein level of these genes were further confirmed in HEK293T and Calu3 cells upon NSP12 overexpression. These results indicate that NSP12 of SARS-CoV-2 can hijack the eEF1A factor to regulate translation efficiency of host mRNAs, which provides a new idea for us to evaluate the impact of SARS-CoV2 virus on the host and study the potential drug targets.
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Affiliation(s)
- Haili Gan
- Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai 201204, China
| | - Xiaoguang Zhou
- Prenatal Diagnosis Center, The Eighth Affiliated Hospital, Sun Yat-sen University, 3025# Shennan Road, Shenzhen 518000, China
| | - Qiong Lei
- Prenatal Diagnosis Center, The Eighth Affiliated Hospital, Sun Yat-sen University, 3025# Shennan Road, Shenzhen 518000, China
| | - Linlin Wu
- Prenatal Diagnosis Center, The Eighth Affiliated Hospital, Sun Yat-sen University, 3025# Shennan Road, Shenzhen 518000, China
| | - Jianmin Niu
- Prenatal Diagnosis Center, The Eighth Affiliated Hospital, Sun Yat-sen University, 3025# Shennan Road, Shenzhen 518000, China
| | - Qingliang Zheng
- Prenatal Diagnosis Center, The Eighth Affiliated Hospital, Sun Yat-sen University, 3025# Shennan Road, Shenzhen 518000, China.
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16
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Roth JF, Braunschweig U, Wu M, Li JD, Lin ZY, Larsen B, Weatheritt RJ, Gingras AC, Blencowe BJ. Systematic analysis of alternative exon-dependent interactome remodeling reveals multitasking functions of gene regulatory factors. Mol Cell 2023; 83:4222-4238.e10. [PMID: 38065061 DOI: 10.1016/j.molcel.2023.10.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 08/09/2023] [Accepted: 10/24/2023] [Indexed: 12/18/2023]
Abstract
Alternative splicing significantly expands biological complexity, particularly in the vertebrate nervous system. Increasing evidence indicates that developmental and tissue-dependent alternative exons often control protein-protein interactions; yet, only a minor fraction of these events have been characterized. Using affinity purification-mass spectrometry (AP-MS), we show that approximately 60% of analyzed neural-differential exons in proteins previously implicated in transcriptional regulation result in the gain or loss of interaction partners, which in some cases form unexpected links with coupled processes. Notably, a neural exon in Chtop regulates its interaction with the Prmt1 methyltransferase and DExD-Box helicases Ddx39b/a, affecting its methylation and activity in promoting RNA export. Additionally, a neural exon in Sap30bp affects interactions with RNA processing factors, modulating a critical function of Sap30bp in promoting the splicing of <100 nt "mini-introns" that control nuclear RNA levels. AP-MS is thus a powerful approach for elucidating the multifaceted functions of proteins imparted by context-dependent alternative exons.
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Affiliation(s)
- Jonathan F Roth
- Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, ON M5G 1X5, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
| | | | - Mingkun Wu
- Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Jack Daiyang Li
- Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Zhen-Yuan Lin
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, ON M5G 1X5, Canada
| | - Brett Larsen
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, ON M5G 1X5, Canada
| | - Robert J Weatheritt
- Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada; EMBL Australia, Garvan Institute of Medical Research, Darlinghurst, NSW 2010, Australia
| | - Anne-Claude Gingras
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, ON M5G 1X5, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada.
| | - Benjamin J Blencowe
- Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada.
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17
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Wu J, Lu X, Yu J, Li P, Yu X. LINC02253 promote the malignant phenotype of Colon adenocarcinoma cells by up-regulating WWP1-mediated SMAD3 ubiquitination. Mol Cell Probes 2023; 72:101928. [PMID: 37597669 DOI: 10.1016/j.mcp.2023.101928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 08/16/2023] [Accepted: 08/16/2023] [Indexed: 08/21/2023]
Abstract
OBJECTIVES Colon adenocarcinoma (COAD) represents a type of common malignant tumor originating in the digestive tract. Long non-coding RNAs (lncRNAs) have been identified to engage in regulating the initiation and development of COAD. LncRNA LINC02253 has been reported abnormal expressed in COAD, but the underlying mechanism has not been discussed so far. This study aimed to determine the role and the molecular biology mechanism of LINC02253 in COAD progression and unearthed its specific molecular mechanism. MATERIALS AND RESULTS RT-qPCR and Western blot assays were conducted to detect gene expression. Function assays were performed to evaluate the effect of gene expression on COAD cell phenotype. Mechanism analyses were done to verify the association among genes after bioinformatics analysis. The obtained data revealed that LINC02253 demonstrated a high expression in COAD tissues and cells. This gene served as an oncogene, permitting to stimulate proliferation and suppress apoptosis of COAD cells. Mechanically, it was found that LINC02253 recruited FUS to stabilize WWP1 mRNA and WWP1 could mediate SMAD3 ubiquitination, thereby promoting the malignant phenotype formation of COAD cells. CONCLUSIONS LINC02253 was uncovered to exert an oncogenic role, enhancing the proliferation of COAD cells and repressing the cell apoptosis by recruiting FUS and encouraging WWP1-mediated SMAD3 ubiquitination.
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Affiliation(s)
- Jinfeng Wu
- Department of Gastroenterology, Shenzhen Luohu People's Hospital, Shenzhen, 518001, Guangdong, China
| | - Xianhong Lu
- Department of Gastroenterology, Shenzhen Luohu People's Hospital, Shenzhen, 518001, Guangdong, China
| | - Jinzhong Yu
- Department of Gastroenterology, Shuguang Hospital Affiliated to Shanghai University of Chinese Medicine, Shanghai, 200120, China
| | - Pan Li
- Institute of Ultrasound Imaging Engineering, Chongqing Medical University, Chongqing, 400000, China
| | - Xiqiu Yu
- Department of Gastroenterology, Shenzhen Luohu People's Hospital, Shenzhen, 518001, Guangdong, China.
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18
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Ortega JA, Sasselli IR, Boccitto M, Fleming AC, Fortuna TR, Li Y, Sato K, Clemons TD, Mckenna ED, Nguyen TP, Anderson EN, Asin J, Ichida JK, Pandey UB, Wolin SL, Stupp SI, Kiskinis E. CLIP-Seq analysis enables the design of protective ribosomal RNA bait oligonucleotides against C9ORF72 ALS/FTD poly-GR pathophysiology. SCIENCE ADVANCES 2023; 9:eadf7997. [PMID: 37948524 PMCID: PMC10637751 DOI: 10.1126/sciadv.adf7997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 10/11/2023] [Indexed: 11/12/2023]
Abstract
Amyotrophic lateral sclerosis and frontotemporal dementia patients with a hexanucleotide repeat expansion in C9ORF72 (C9-HRE) accumulate poly-GR and poly-PR aggregates. The pathogenicity of these arginine-rich dipeptide repeats (R-DPRs) is thought to be driven by their propensity to bind low-complexity domains of multivalent proteins. However, the ability of R-DPRs to bind native RNA and the significance of this interaction remain unclear. Here, we used computational and experimental approaches to characterize the physicochemical properties of R-DPRs and their interaction with RNA. We find that poly-GR predominantly binds ribosomal RNA (rRNA) in cells and exhibits an interaction that is predicted to be energetically stronger than that for associated ribosomal proteins. Critically, modified rRNA "bait" oligonucleotides restore poly-GR-associated ribosomal deficits and ameliorate poly-GR toxicity in patient neurons and Drosophila models. Our work strengthens the hypothesis that ribosomal function is impaired by R-DPRs, highlights a role for direct rRNA binding in mediating ribosomal dysfunction, and presents a strategy for protecting against C9-HRE pathophysiological mechanisms.
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Affiliation(s)
- Juan A. Ortega
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Pathology and Experimental Therapy, Institute of Neurosciences, University of Barcelona, Barcelona 08907, Spain
| | - Ivan R. Sasselli
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián 20014, Spain
- Centro de Fisica de Materiales (CFM), CSIC-UPV/EHU, 20018 San Sebastián, Spain
| | - Marco Boccitto
- RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Andrew C. Fleming
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Tyler R. Fortuna
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Yichen Li
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Kohei Sato
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
| | - Tristan D. Clemons
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
| | - Elizabeth D. Mckenna
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Thao P. Nguyen
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Eric N. Anderson
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Jesus Asin
- Department of Statistical Methods, School of Engineering, University of Zaragoza, Zaragoza 50018, Spain
| | - Justin K. Ichida
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Udai B. Pandey
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Sandra L. Wolin
- RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Samuel I. Stupp
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Evangelos Kiskinis
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
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19
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Yu NJ, Dai W, Li A, He M, Kleiner RE. Cell type-specific translational regulation by human DUS enzymes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.03.565399. [PMID: 37965204 PMCID: PMC10635104 DOI: 10.1101/2023.11.03.565399] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Dihydrouridine is an abundant and conserved modified nucleoside present on tRNA, but characterization and functional studies of modification sites and associated DUS writer enzymes in mammals is lacking. Here we use a chemical probing strategy, RNABPP-PS, to identify 5-chlorouridine as an activity-based probe for human DUS enzymes. We map D modifications using RNA-protein crosslinking and chemical transformation and mutational profiling to reveal D modification sites on human tRNAs. Further, we knock out individual DUS genes in two human cell lines to investigate regulation of tRNA expression levels and codon-specific translation. We show that whereas D modifications are present across most tRNA species, loss of D only perturbs the translational function of a subset of tRNAs in a cell type-specific manner. Our work provides powerful chemical strategies for investigating D and DUS enzymes in diverse biological systems and provides insight into the role of a ubiquitous tRNA modification in translational regulation.
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20
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Moursy A, Cléry A, Gerhardy S, Betz KM, Rao S, Mazur J, Campagne S, Beusch I, Duszczyk MM, Robinson MD, Panse VG, Allain FHT. RNA recognition by Npl3p reveals U2 snRNA-binding compatible with a chaperone role during splicing. Nat Commun 2023; 14:7166. [PMID: 37935663 PMCID: PMC10630445 DOI: 10.1038/s41467-023-42962-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 10/27/2023] [Indexed: 11/09/2023] Open
Abstract
The conserved SR-like protein Npl3 promotes splicing of diverse pre-mRNAs. However, the RNA sequence(s) recognized by the RNA Recognition Motifs (RRM1 & RRM2) of Npl3 during the splicing reaction remain elusive. Here, we developed a split-iCRAC approach in yeast to uncover the consensus sequence bound to each RRM. High-resolution NMR structures show that RRM2 recognizes a 5´-GNGG-3´ motif leading to an unusual mille-feuille topology. These structures also reveal how RRM1 preferentially interacts with a CC-dinucleotide upstream of this motif, and how the inter-RRM linker and the region C-terminal to RRM2 contribute to cooperative RNA-binding. Structure-guided functional studies show that Npl3 genetically interacts with U2 snRNP specific factors and we provide evidence that Npl3 melts U2 snRNA stem-loop I, a prerequisite for U2/U6 duplex formation within the catalytic center of the Bact spliceosomal complex. Thus, our findings suggest an unanticipated RNA chaperoning role for Npl3 during spliceosome active site formation.
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Affiliation(s)
- Ahmed Moursy
- Department of Biology, Institute of Biochemistry, ETH Zurich, Switzerland
- Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Antoine Cléry
- Department of Biology, Institute of Biochemistry, ETH Zurich, Switzerland.
| | - Stefan Gerhardy
- Department of Biology, Institute of Biochemistry, ETH Zurich, Switzerland
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
- Sardona Therapeutics, San Francisco, CA, USA
| | - Katharina M Betz
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - Sanjana Rao
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - Jarosław Mazur
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - Sébastien Campagne
- Department of Biology, Institute of Biochemistry, ETH Zurich, Switzerland
- ARNA laboratory, INSERM U1212, University of Bordeaux, Bordeaux, France
| | - Irene Beusch
- Department of Biology, Institute of Biochemistry, ETH Zurich, Switzerland
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, USA
| | | | - Mark D Robinson
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - Vikram Govind Panse
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland.
- Faculty of Science, University of Zurich, Zurich, Switzerland.
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21
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Chen L, Xu Z, Huang J, Shu H, Hui Y, Zhu D, Wu Y, Dong S, Wu Z. Plant immunity suppressor SKRP encodes a novel RNA-binding protein that targets exon 3' end of unspliced RNA. THE NEW PHYTOLOGIST 2023; 240:1467-1483. [PMID: 37658678 DOI: 10.1111/nph.19236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 08/01/2023] [Indexed: 09/03/2023]
Abstract
The regulatory roles of RNA splicing in plant immunity are emerging but still largely obscure. We reported previously that Phytophthora pathogen effector Avr3c targets a soybean protein SKRP (serine/lysine/arginine-rich protein) to impair soybean basal immunity by regulating host pre-mRNA alternative splicing, while the biochemical nature of SKRP remains unknown. Here, by using Arabidopsis as a model, we studied the mechanism of SKRP in regulating pre-mRNA splicing and plant immunity. AtSKRP confers impaired plant immunity against Phytophthora capsici and associates with spliceosome component PRP8 and splicing factor SR45, which positively and negatively regulate plant immunity, respectively. Enhanced crosslinking and immunoprecipitation followed by high-throughput sequencing (eCLIP-seq) showed AtSKRP is a novel RNA-binding protein that targets exon 3' end of unspliced RNA. Such position-specific binding of SKRP is associated with its activity in suppressing intron retention, including at positive immune regulatory genes UBP25 and RAR1. In addition, we found AtSKRP self-interact and forms oligomer, and these properties are associated with its function in plant immunity. Overall, our findings reveal that the immune repressor SKRP is a spliceosome-associated protein that targets exon 3' end to regulate pre-mRNA splicing in Arabidopsis.
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Affiliation(s)
- Ling Chen
- Department of Plant Pathology, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), and The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zhihui Xu
- National Key Laboratory for Crop Genetics and Germplasm Enhancement, Bioinformatics Center, Academy for Advanced Interdisciplinary Studies, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jie Huang
- Department of Plant Pathology, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), and The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, 210095, China
| | - Haidong Shu
- Department of Plant Pathology, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), and The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yufan Hui
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
- School of Computing Sciences, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Danling Zhu
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yufeng Wu
- National Key Laboratory for Crop Genetics and Germplasm Enhancement, Bioinformatics Center, Academy for Advanced Interdisciplinary Studies, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, 210095, China
| | - Suomeng Dong
- Department of Plant Pathology, Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), and The Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhe Wu
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, 518055, China
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22
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Das A, Liu T, Li H, Husain S. The RNA-binding protein RBP42 regulates cellular energy metabolism in mammalian-infective Trypanosoma brucei. mSphere 2023; 8:e0027323. [PMID: 37581443 PMCID: PMC10654194 DOI: 10.1128/msphere.00273-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 06/05/2023] [Indexed: 08/16/2023] Open
Abstract
RNA-binding proteins (RBPs) are key players in coordinated post-transcriptional regulation of functionally related genes, defined as RNA regulons. RNA regulons play particularly critical roles in parasitic trypanosomes, which exhibit unregulated co-transcription of long unrelated gene arrays. In this report, we present a systematic analysis of an essential RBP, RBP42, in the mammalian-infective bloodstream form of African trypanosome and show that RBP42 is a key regulator of parasite's central carbon and energy metabolism. Using individual-nucleotide resolution UV cross-linking and immunoprecipitation to identify genome-wide RBP42-RNA interactions, we show that RBP42 preferentially binds within the coding region of mRNAs encoding core metabolic enzymes. Global quantitative transcriptomic and proteomic analyses reveal that loss of RBP42 reduces the abundance of target mRNA-encoded proteins, but not target mRNA, suggesting a positive translational regulatory role of RBP42. Significant changes in central carbon metabolic intermediates, following loss of RBP42, further support its critical role in cellular energy metabolism. Trypanosoma brucei infection, transmitted through the bite of blood-feeding tsetse flies, causes deadly diseases in humans and livestock. This disease, if left untreated, is almost always fatal. Existing therapies are toxic and difficult to administer. During T. brucei's lifecycle in two different host environments, the parasite progresses through distinctive life stages with major morphological and metabolic changes, requiring precise alteration of parasite gene expression program. In the absence of regulated transcription, post-transcriptional processes mediated by RNA-binding proteins play critical roles in T. brucei gene regulation. In this study, we show that the RNA-binding protein RBP42 plays crucial roles in cellular energy metabolic regulation of this important human pathogen. Metabolic dysregulation observed in RBP42 knockdown cells offers a breadth of potential interest to researchers studying parasite biology and can also impact research in general eukaryotic biology.
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Affiliation(s)
- Anish Das
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers-New Jersey Medical School, Newark, New Jersey, USA
| | - Tong Liu
- Center for Advanced Proteomics Research, Rutgers-New Jersey Medical School, Newark, New Jersey, USA
| | - Hong Li
- Center for Advanced Proteomics Research, Rutgers-New Jersey Medical School, Newark, New Jersey, USA
| | - Seema Husain
- Genomics Center, Rutgers-New Jersey Medical School, Newark, New Jersey, USA
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23
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Esteban‐Serna S, McCaughan H, Granneman S. Advantages and limitations of UV cross-linking analysis of protein-RNA interactomes in microbes. Mol Microbiol 2023; 120:477-489. [PMID: 37165708 PMCID: PMC10952675 DOI: 10.1111/mmi.15073] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/28/2023] [Accepted: 04/30/2023] [Indexed: 05/12/2023]
Abstract
RNA-binding proteins (RBPs) govern the lifespan of nearly all transcripts and play key roles in adaptive responses in microbes. A robust approach to examine protein-RNA interactions involves irradiating cells with UV light to form covalent adducts between RBPs and their cognate RNAs. Combined with RNA or protein purification, these procedures can provide global RBP censuses or transcriptomic maps for all target sequences of a single protein in living cells. The recent development of novel methods has quickly populated the RBP landscape in microorganisms. Here, we provide an overview of prominent UV cross-linking techniques which have been applied to investigate RNA interactomes in microbes. By assessing their advantages and caveats, this technical evaluation intends to guide the selection of appropriate methods and experimental design as well as to encourage the use of complementary UV-dependent techniques to inspect RNA-binding activity.
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Affiliation(s)
- Sofia Esteban‐Serna
- Centre for Engineering Biology, School of Biological SciencesUniversity of EdinburghEdinburghUK
| | - Hugh McCaughan
- Centre for Engineering Biology, School of Biological SciencesUniversity of EdinburghEdinburghUK
| | - Sander Granneman
- Centre for Engineering Biology, School of Biological SciencesUniversity of EdinburghEdinburghUK
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24
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Singh V, Walter V, Elcheva I, Imamura Kawasawa Y, Spiegelman VS. Global role of IGF2BP1 in controlling the expression of Wnt/β-catenin-regulated genes in colorectal cancer cells. Front Cell Dev Biol 2023; 11:1236356. [PMID: 37829185 PMCID: PMC10565211 DOI: 10.3389/fcell.2023.1236356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 09/12/2023] [Indexed: 10/14/2023] Open
Abstract
Introduction: Wnt/β-catenin signaling controls cell division and lineage specification during embryonic development, and is crucial for stem cells maintenance and gut tissue regeneration in adults. Aberrant activation of Wnt/β-catenin signaling is also essential for the pathogenesis of a variety of malignancies. The RNA-binding protein IGF2BP1 is a transcriptional target of Wnt/β-catenin signaling, normally expressed during development and often reactivated in cancer cells, where it regulates the stability of oncogenic mRNA. Methods: In this study, we employed iCLIP and RNA sequencing techniques to investigate the role of IGF2BP1 in the post-transcriptional regulation of Wnt/β-catenin-induced genes at a global level within colorectal cancer (CRC) cells characterized by constitutively active Wnt/β-catenin signaling. Results and Discussion: In our study, we show that, in contrast to normal cells, CRC cells exhibit a much stronger dependency on IGF2BP1 expression for Wnt/β-catenin-regulated genes. We show that both untransformed and CRC cells have their unique subsets of Wnt/β-catenin-regulated genes that IGF2BP1 directly controls through binding to their mRNA. Our iCLIP analysis revealed a significant change in the IGF2BP1-binding sites throughout the target transcriptomes and a significant change in the enrichment of 6-mer motifs associated with IGF2BP1 binding in response to Wnt/β-catenin signaling. Our study also revealed a signature of IGF2BP1-regulated genes that are significantly associated with colon cancer-free survival in humans, as well as potential targets for CRC treatment. Overall, this study highlights the complex and context-dependent regulation of Wnt/β-catenin signaling target genes by IGF2BP1 in non-transformed and CRC cells and identifies potential targets for colon cancer treatment.
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Affiliation(s)
- Vikash Singh
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
| | - Vonn Walter
- Department of Public Health Science, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
| | - Irina Elcheva
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
| | - Yuka Imamura Kawasawa
- Department of Pharmacology, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
| | - Vladimir S. Spiegelman
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, College of Medicine, The Pennsylvania State University, Hershey, PA, United States
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25
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Nicastro G, Abis G, Klein P, Esteban-Serna S, Gallagher C, Chaves-Arquero B, Cai Y, Figueiredo AM, Martin SR, Patani R, Taylor IA, Ramos A. Direct m6A recognition by IMP1 underlays an alternative model of target selection for non-canonical methyl-readers. Nucleic Acids Res 2023; 51:8774-8786. [PMID: 37377445 PMCID: PMC10484666 DOI: 10.1093/nar/gkad534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 06/02/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
m6A methylation provides an essential layer of regulation in organismal development, and is aberrant in a range of cancers and neuro-pathologies. The information encoded by m6A methylation is integrated into existing RNA regulatory networks by RNA binding proteins that recognise methylated sites, the m6A readers. m6A readers include a well-characterised class of dedicated proteins, the YTH proteins, as well as a broader group of multi-functional regulators where recognition of m6A is only partially understood. Molecular insight in this recognition is essential to build a mechanistic understanding of global m6A regulation. In this study, we show that the reader IMP1 recognises the m6A using a dedicated hydrophobic platform that assembles on the methyl moiety, creating a stable high-affinity interaction. This recognition is conserved across evolution and independent from the underlying sequence context but is layered upon the strong sequence specificity of IMP1 for GGAC RNA. This leads us to propose a concept for m6A regulation where methylation plays a context-dependent role in the recognition of selected IMP1 targets that is dependent on the cellular concentration of available IMP1, differing from that observed for the YTH proteins.
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Affiliation(s)
- Giuseppe Nicastro
- Macromolecular Structure Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Giancarlo Abis
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Pierre Klein
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Sofia Esteban-Serna
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Christopher Gallagher
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Belen Chaves-Arquero
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Yuyang Cai
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Angelo Miguel Figueiredo
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Stephen R Martin
- Structural Biology Technology Platform, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, UK
| | - Rickie Patani
- Human Stem Cells and Neurodegeneration Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Ian A Taylor
- Macromolecular Structure Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
| | - Andres Ramos
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
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26
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Balendra R, Ruiz de Los Mozos I, Odeh HM, Glaria I, Milioto C, Wilson KM, Ule AM, Hallegger M, Masino L, Martin S, Patani R, Shorter J, Ule J, Isaacs AM. Transcriptome-wide RNA binding analysis of C9orf72 poly(PR) dipeptides. Life Sci Alliance 2023; 6:e202201824. [PMID: 37438085 PMCID: PMC10338859 DOI: 10.26508/lsa.202201824] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 06/25/2023] [Accepted: 06/26/2023] [Indexed: 07/14/2023] Open
Abstract
An intronic GGGGCC repeat expansion in C9orf72 is a common genetic cause of amyotrophic lateral sclerosis and frontotemporal dementia. The repeats are transcribed in both sense and antisense directions to generate distinct dipeptide repeat proteins, of which poly(GA), poly(GR), and poly(PR) have been implicated in contributing to neurodegeneration. Poly(PR) binding to RNA may contribute to toxicity, but analysis of poly(PR)-RNA binding on a transcriptome-wide scale has not yet been carried out. We therefore performed crosslinking and immunoprecipitation (CLIP) analysis in human cells to identify the RNA binding sites of poly(PR). We found that poly(PR) binds to nearly 600 RNAs, with the sequence GAAGA enriched at the binding sites. In vitro experiments showed that poly(GAAGA) RNA binds poly(PR) with higher affinity than control RNA and induces the phase separation of poly(PR) into condensates. These data indicate that poly(PR) preferentially binds to poly(GAAGA)-containing RNAs, which may have physiological consequences.
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Affiliation(s)
- Rubika Balendra
- UK Dementia Research Institute at UCL, London, UK
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Igor Ruiz de Los Mozos
- The Francis Crick Institute, London, UK
- Department of Personalized Medicine, NASERTIC, Government of Navarra, Pamplona, Spain
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Hana M Odeh
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Idoia Glaria
- UK Dementia Research Institute at UCL, London, UK
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
- Research Support Service, Institute of Agrobiotechnology, CSIC-Government of Navarra, Mutilva, Spain
| | - Carmelo Milioto
- UK Dementia Research Institute at UCL, London, UK
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Katherine M Wilson
- UK Dementia Research Institute at UCL, London, UK
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Agnieszka M Ule
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | | | - Laura Masino
- Structural Biology Science Technology Platform, The Francis Crick Institute, London, UK
| | - Stephen Martin
- Structural Biology Science Technology Platform, The Francis Crick Institute, London, UK
| | - Rickie Patani
- The Francis Crick Institute, London, UK
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - James Shorter
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Jernej Ule
- The Francis Crick Institute, London, UK
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
- UK Dementia Research Institute at King's College London, Maurice Wohl Clinical Neuroscience Institute, London, UK
| | - Adrian M Isaacs
- UK Dementia Research Institute at UCL, London, UK
- Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
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27
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Horlacher M, Wagner N, Moyon L, Kuret K, Goedert N, Salvatore M, Ule J, Gagneur J, Winther O, Marsico A. Towards in silico CLIP-seq: predicting protein-RNA interaction via sequence-to-signal learning. Genome Biol 2023; 24:180. [PMID: 37542318 PMCID: PMC10403857 DOI: 10.1186/s13059-023-03015-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 07/17/2023] [Indexed: 08/06/2023] Open
Abstract
We present RBPNet, a novel deep learning method, which predicts CLIP-seq crosslink count distribution from RNA sequence at single-nucleotide resolution. By training on up to a million regions, RBPNet achieves high generalization on eCLIP, iCLIP and miCLIP assays, outperforming state-of-the-art classifiers. RBPNet performs bias correction by modeling the raw signal as a mixture of the protein-specific and background signal. Through model interrogation via Integrated Gradients, RBPNet identifies predictive sub-sequences that correspond to known and novel binding motifs and enables variant-impact scoring via in silico mutagenesis. Together, RBPNet improves imputation of protein-RNA interactions, as well as mechanistic interpretation of predictions.
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Affiliation(s)
- Marc Horlacher
- Computational Health Center, Helmholtz Center Munich, Munich, Germany.
- Department of Biology, University of Copenhagen, Copenhagen, Denmark.
- Department of Informatics, Technical University of Munich, Garching, Germany.
- Helmholtz Association - Munich School for Data Science (MUDS), Munich, Germany.
| | - Nils Wagner
- Department of Informatics, Technical University of Munich, Garching, Germany
- Helmholtz Association - Munich School for Data Science (MUDS), Munich, Germany
| | - Lambert Moyon
- Computational Health Center, Helmholtz Center Munich, Munich, Germany
| | - Klara Kuret
- National Institute of Chemistry, Ljubljana, Slovenia
- The Francis Crick Institute, London, UK
- Jozef Stefan International Postgraduate School, Jamova cesta 39, 1000, Ljubljana, Slovenia
| | - Nicolas Goedert
- Computational Health Center, Helmholtz Center Munich, Munich, Germany
| | - Marco Salvatore
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Jernej Ule
- National Institute of Chemistry, Ljubljana, Slovenia
- The Francis Crick Institute, London, UK
| | - Julien Gagneur
- Computational Health Center, Helmholtz Center Munich, Munich, Germany
- Department of Informatics, Technical University of Munich, Garching, Germany
- Helmholtz Association - Munich School for Data Science (MUDS), Munich, Germany
| | - Ole Winther
- Department of Biology, University of Copenhagen, Copenhagen, Denmark.
| | - Annalisa Marsico
- Computational Health Center, Helmholtz Center Munich, Munich, Germany.
- Helmholtz Association - Munich School for Data Science (MUDS), Munich, Germany.
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28
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Hiemenz C, Pacios-Michelena A, Helbig C, Vezočnik V, Strebl M, Nikels F, Hawe A, Garidel P, Menzen T. Characterization of Virus Particles and Submicron-Sized Particulate Impurities in Recombinant Adeno-Associated Virus Drug Product. J Pharm Sci 2023; 112:2190-2202. [PMID: 37211315 DOI: 10.1016/j.xphs.2023.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/15/2023] [Accepted: 05/15/2023] [Indexed: 05/23/2023]
Abstract
Characterization of particulate impurities such as aggregates is necessary to develop safe and efficacious adeno-associated virus (AAV) drug products. Although aggregation of AAVs can reduce the bioavailability of the virus, only a limited number of studies focus on the analysis of aggregates. We explored three technologies for their capability to characterize AAV monomers and aggregates in the submicron (<1 µm) size range: (i) mass photometry (MP), (ii) asymmetric flow field flow fractionation coupled to a UV-detector (AF4-UV/Vis) and (iii) microfluidic resistive pulse sensing (MRPS). Although low counts for aggregates impeded a quantitative analysis, MP was affirmed as an accurate and rapid method for quantifying the genome content of empty/filled/double-filled capsids, consistent with sedimentation velocity analytical ultracentrifugation results. MRPS and AF4-UV/Vis enabled the detection and quantification of aggregate content. The developed AF4-UV/Vis method separated AAV monomers from smaller aggregates, thereby enabling a quantification of aggregates <200 nm. MRPS was experienced as a straightforward method to determine the particle concentration and size distribution between 250-2000 nm, provided that the samples do not block the microfluidic cartridge. Overall, within this study we explored the benefits and limitations of the complementary technologies for assessing aggregate content in AAV samples.
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Affiliation(s)
| | | | | | | | - Michael Strebl
- Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Innovation Unit, Germany
| | - Felix Nikels
- Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Innovation Unit, Germany.
| | - Andrea Hawe
- Coriolis Pharma Research GmbH, Martinsried, Germany
| | - Patrick Garidel
- Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Innovation Unit, Germany
| | - Tim Menzen
- Coriolis Pharma Research GmbH, Martinsried, Germany.
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29
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Silveira d'Almeida G, Casius A, Henderson JC, Knuesel S, Aphasizhev R, Aphasizheva I, Manning AC, Lowe TM, Alfonzo JD. tRNA Tyr has an unusually short half-life in Trypanosoma brucei. RNA (NEW YORK, N.Y.) 2023; 29:1243-1254. [PMID: 37197826 PMCID: PMC10351884 DOI: 10.1261/rna.079674.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 04/28/2023] [Indexed: 05/19/2023]
Abstract
Following transcription, tRNAs undergo a series of processing and modification events to become functional adaptors in protein synthesis. Eukaryotes have also evolved intracellular transport systems whereby nucleus-encoded tRNAs may travel out and into the nucleus. In trypanosomes, nearly all tRNAs are also imported from the cytoplasm into the mitochondrion, which lacks tRNA genes. Differential subcellular localization of the cytoplasmic splicing machinery and a nuclear enzyme responsible for queuosine modification at the anticodon "wobble" position appear to be important quality control mechanisms for tRNATyr, the only intron-containing tRNA in T. brucei Since tRNA-guanine transglycosylase (TGT), the enzyme responsible for Q formation, cannot act on an intron-containing tRNA, retrograde nuclear transport is an essential step in maturation. Unlike maturation/processing pathways, the general mechanisms of tRNA stabilization and degradation in T. brucei are poorly understood. Using a combination of cellular and molecular approaches, we show that tRNATyr has an unusually short half-life. tRNATyr, and in addition tRNAAsp, also show the presence of slow-migrating bands during electrophoresis; we term these conformers: alt-tRNATyr and alt-tRNAAsp, respectively. Although we do not know the chemical or structural nature of these conformers, alt-tRNATyr has a short half-life resembling that of tRNATyr; the same is not true for alt-tRNAAsp We also show that RRP44, which is usually an exosome subunit in other organisms, is involved in tRNA degradation of the only intron-containing tRNA in T. brucei and is partly responsible for its unusually short half-life.
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Affiliation(s)
- Gabriel Silveira d'Almeida
- Department of Microbiology, The Ohio State University, Columbus, Ohio 43210, USA
- The Center for RNA Biology, The Ohio State University, Columbus, Ohio 43210, USA
| | - Ananth Casius
- Department of Microbiology, The Ohio State University, Columbus, Ohio 43210, USA
- The Center for RNA Biology, The Ohio State University, Columbus, Ohio 43210, USA
| | - Jeremy C Henderson
- Department of Microbiology, The Ohio State University, Columbus, Ohio 43210, USA
- The Center for RNA Biology, The Ohio State University, Columbus, Ohio 43210, USA
| | - Sebastian Knuesel
- Department of Molecular and Cell Biology, Boston University School of Dental Medicine, Boston 02118, USA
| | - Ruslan Aphasizhev
- Department of Molecular and Cell Biology, Boston University School of Dental Medicine, Boston 02118, USA
| | - Inna Aphasizheva
- Department of Molecular and Cell Biology, Boston University School of Dental Medicine, Boston 02118, USA
| | - Aidan C Manning
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, California 95064, USA
| | - Todd M Lowe
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, California 95064, USA
| | - Juan D Alfonzo
- Department of Microbiology, The Ohio State University, Columbus, Ohio 43210, USA
- The Center for RNA Biology, The Ohio State University, Columbus, Ohio 43210, USA
- The Ohio State Biochemistry Program, The Ohio State University, Columbus, Ohio 43210, USA
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30
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Pederiva C, Trevisan DM, Peirasmaki D, Chen S, Savage SA, Larsson O, Ule J, Baranello L, Agostini F, Farnebo M. Control of protein synthesis through mRNA pseudouridylation by dyskerin. SCIENCE ADVANCES 2023; 9:eadg1805. [PMID: 37506213 PMCID: PMC10381945 DOI: 10.1126/sciadv.adg1805] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 06/26/2023] [Indexed: 07/30/2023]
Abstract
Posttranscriptional modifications of mRNA have emerged as regulators of gene expression. Although pseudouridylation is the most abundant, its biological role remains poorly understood. Here, we demonstrate that the pseudouridine synthase dyskerin associates with RNA polymerase II, binds to thousands of mRNAs, and is responsible for their pseudouridylation, an action that occurs in chromatin and does not appear to require a guide RNA with full complementarity. In cells lacking dyskerin, mRNA pseudouridylation is reduced, while at the same time, de novo protein synthesis is enhanced, indicating that this modification interferes with translation. Accordingly, mRNAs with fewer pseudouridines due to knockdown of dyskerin are translated more efficiently. Moreover, mRNA pseudouridylation is severely reduced in patients with dyskeratosis congenita caused by inherited mutations in the gene encoding dyskerin (i.e., DKC1). Our findings demonstrate that pseudouridylation by dyskerin modulates mRNA translatability, with important implications for both normal development and disease.
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Affiliation(s)
- Chiara Pederiva
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna 17165, Sweden
| | - Davide M. Trevisan
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge 14152, Sweden
| | - Dimitra Peirasmaki
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna 17165, Sweden
| | - Shan Chen
- Department of Oncology and Pathology, Karolinska Institutet, Solna 17165, Sweden
- Science for Life Laboratory, Stockholm 17165, Sweden
| | - Sharon A. Savage
- Clinical Genetics Branch, Division of Cancer Epidemiology & Genetics, National Cancer Institute, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD 20852, USA
| | - Ola Larsson
- Department of Oncology and Pathology, Karolinska Institutet, Solna 17165, Sweden
- Science for Life Laboratory, Stockholm 17165, Sweden
| | - Jernej Ule
- The Francis Crick Institute, London NW1 1AT, UK
- UK Dementia Research Institute, King’s College London, London W1T 7NF, UK
- National Institute of Chemistry, 1001 Ljubljana, Slovenia
| | - Laura Baranello
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna 17165, Sweden
| | - Federico Agostini
- Science for Life Laboratory, Stockholm 17165, Sweden
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Solna 17165, Sweden
| | - Marianne Farnebo
- Department of Cell and Molecular Biology, Karolinska Institutet, Solna 17165, Sweden
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge 14152, Sweden
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31
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Mas AM, Goñi E, Ruiz de Los Mozos I, Arcas A, Statello L, González J, Blázquez L, Lee WTC, Gupta D, Sejas Á, Hoshina S, Armaos A, Tartaglia GG, Waga S, Ule J, Rothenberg E, Gómez M, Huarte M. ORC1 binds to cis-transcribed RNAs for efficient activation of replication origins. Nat Commun 2023; 14:4447. [PMID: 37488096 PMCID: PMC10366126 DOI: 10.1038/s41467-023-40105-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/11/2023] [Indexed: 07/26/2023] Open
Abstract
Cells must coordinate the activation of thousands of replication origins dispersed throughout their genome. Active transcription is known to favor the formation of mammalian origins, although the role that RNA plays in this process remains unclear. We show that the ORC1 subunit of the human Origin Recognition Complex interacts with RNAs transcribed from genes with origins in their transcription start sites (TSSs), displaying a positive correlation between RNA binding and origin activity. RNA depletion, or the use of ORC1 RNA-binding mutant, result in inefficient activation of proximal origins, linked to impaired ORC1 chromatin release. ORC1 RNA binding activity resides in its intrinsically disordered region, involved in intra- and inter-molecular interactions, regulation by phosphorylation, and phase-separation. We show that RNA binding favors ORC1 chromatin release, by regulating its phosphorylation and subsequent degradation. Our results unveil a non-coding function of RNA as a dynamic component of the chromatin, orchestrating the activation of replication origins.
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Affiliation(s)
- Aina Maria Mas
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain
| | - Enrique Goñi
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain
| | - Igor Ruiz de Los Mozos
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain
| | - Aida Arcas
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain
| | - Luisa Statello
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain
| | - Jovanna González
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain
| | - Lorea Blázquez
- RNA Networks Lab, The Francis Crick Institute, NW11BF, London, UK
- Neurosciences Area, Biodonostia Health Research Institute, 20014, San Sebastian, Spain
- Ikerbasque, Basque Foundation for Science, 48009, Bilbao, Spain
| | - Wei Ting Chelsea Lee
- Department of Biochemistry and Molecular Pharmacology, Perlmutter Cancer Center, New York University School of Medicine, New York, NY, 10016, USA
| | - Dipika Gupta
- Department of Biochemistry and Molecular Pharmacology, Perlmutter Cancer Center, New York University School of Medicine, New York, NY, 10016, USA
| | - Álvaro Sejas
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain
| | - Shoko Hoshina
- Department of Chemical and Biological Sciences, Japan Women's University, Tokyo, 112-8681, Japan
| | - Alexandros Armaos
- Center for Human Technologies, Istituto Italiano di Tecnologia, Genova, Italy
| | - Gian Gaetano Tartaglia
- Center for Human Technologies, Istituto Italiano di Tecnologia, Genova, Italy
- Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Department of Biology 'Charles Darwin', Sapienza University of Rome, Rome, Italy
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Shou Waga
- Department of Chemical and Biological Sciences, Japan Women's University, Tokyo, 112-8681, Japan
| | - Jernej Ule
- RNA Networks Lab, The Francis Crick Institute, NW11BF, London, UK
| | - Eli Rothenberg
- Department of Biochemistry and Molecular Pharmacology, Perlmutter Cancer Center, New York University School of Medicine, New York, NY, 10016, USA
| | - María Gómez
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas/Universidad Autónoma de Madrid (CSIC/UAM), Nicolás Cabrera 1, 28049, Madrid, Spain
| | - Maite Huarte
- Center for Applied Medical Research, University of Navarra, Pio XII 55 Ave, 31008, Pamplona, Spain.
- Institute of Health Research of Navarra (IdiSNA), Cancer Center Clínica Universidad de Navarra (CCUN), Pamplona, Spain.
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32
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Meindl A, Romberger M, Lehmann G, Eichner N, Kleemann L, Wu J, Danner J, Boesl M, Mesitov M, Meister G, König J, Leidel S, Medenbach J. A rapid protocol for ribosome profiling of low input samples. Nucleic Acids Res 2023; 51:e68. [PMID: 37246712 PMCID: PMC10359457 DOI: 10.1093/nar/gkad459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 05/04/2023] [Accepted: 05/13/2023] [Indexed: 05/30/2023] Open
Abstract
Ribosome profiling provides quantitative, comprehensive, and high-resolution snapshots of cellular translation by the high-throughput sequencing of short mRNA fragments that are protected by ribosomes from nucleolytic digestion. While the overall principle is simple, the workflow of ribosome profiling experiments is complex and challenging, and typically requires large amounts of sample, limiting its broad applicability. Here, we present a new protocol for ultra-rapid ribosome profiling from low-input samples. It features a robust strategy for sequencing library preparation within one day that employs solid phase purification of reaction intermediates, allowing to reduce the input to as little as 0.1 pmol of ∼30 nt RNA fragments. Hence, it is particularly suited for the analyses of small samples or targeted ribosome profiling. Its high sensitivity and its ease of implementation will foster the generation of higher quality data from small samples, which opens new opportunities in applying ribosome profiling.
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Affiliation(s)
- Andreas Meindl
- Regensburg Center for Biochemistry, University of Regensburg, Regensburg, Germany
| | - Markus Romberger
- Regensburg Center for Biochemistry, University of Regensburg, Regensburg, Germany
| | - Gerhard Lehmann
- Biochemistry I, University of Regensburg, Regensburg, Germany
| | - Norbert Eichner
- Biochemistry I, University of Regensburg, Regensburg, Germany
| | - Leon Kleemann
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Jie Wu
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Johannes Danner
- Biochemistry I, University of Regensburg, Regensburg, Germany
| | - Maria Boesl
- Regensburg Center for Biochemistry, University of Regensburg, Regensburg, Germany
| | | | - Gunter Meister
- Biochemistry I, University of Regensburg, Regensburg, Germany
| | - Julian König
- Institute of Molecular Biology (IMB), Mainz, Germany
| | - Sebastian Andreas Leidel
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Jan Medenbach
- Regensburg Center for Biochemistry, University of Regensburg, Regensburg, Germany
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33
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Ebersberger S, Hipp C, Mulorz MM, Buchbender A, Hubrich D, Kang HS, Martínez-Lumbreras S, Kristofori P, Sutandy FXR, Llacsahuanga Allcca L, Schönfeld J, Bakisoglu C, Busch A, Hänel H, Tretow K, Welzel M, Di Liddo A, Möckel MM, Zarnack K, Ebersberger I, Legewie S, Luck K, Sattler M, König J. FUBP1 is a general splicing factor facilitating 3' splice site recognition and splicing of long introns. Mol Cell 2023:S1097-2765(23)00516-6. [PMID: 37506698 DOI: 10.1016/j.molcel.2023.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 05/19/2023] [Accepted: 07/03/2023] [Indexed: 07/30/2023]
Abstract
Splicing of pre-mRNAs critically contributes to gene regulation and proteome expansion in eukaryotes, but our understanding of the recognition and pairing of splice sites during spliceosome assembly lacks detail. Here, we identify the multidomain RNA-binding protein FUBP1 as a key splicing factor that binds to a hitherto unknown cis-regulatory motif. By collecting NMR, structural, and in vivo interaction data, we demonstrate that FUBP1 stabilizes U2AF2 and SF1, key components at the 3' splice site, through multivalent binding interfaces located within its disordered regions. Transcriptional profiling and kinetic modeling reveal that FUBP1 is required for efficient splicing of long introns, which is impaired in cancer patients harboring FUBP1 mutations. Notably, FUBP1 interacts with numerous U1 snRNP-associated proteins, suggesting a unique role for FUBP1 in splice site bridging for long introns. We propose a compelling model for 3' splice site recognition of long introns, which represent 80% of all human introns.
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Affiliation(s)
| | - Clara Hipp
- Institute of Structural Biology, Helmholtz Center Munich, 85764 Neuherberg, Germany; Bavarian NMR Center, Department of Bioscience, School of Natural Sciences, Technical University of Munich, 85747 Garching, Germany
| | - Miriam M Mulorz
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | | | - Dalmira Hubrich
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | - Hyun-Seo Kang
- Institute of Structural Biology, Helmholtz Center Munich, 85764 Neuherberg, Germany; Bavarian NMR Center, Department of Bioscience, School of Natural Sciences, Technical University of Munich, 85747 Garching, Germany
| | - Santiago Martínez-Lumbreras
- Institute of Structural Biology, Helmholtz Center Munich, 85764 Neuherberg, Germany; Bavarian NMR Center, Department of Bioscience, School of Natural Sciences, Technical University of Munich, 85747 Garching, Germany
| | - Panajot Kristofori
- Department of Systems Biology, Institute for Biomedical Genetics (IBMG), University of Stuttgart, 70569 Stuttgart, Germany
| | | | | | - Jonas Schönfeld
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | - Cem Bakisoglu
- Buchmann Institute for Molecular Life Sciences & Institute of Molecular Biosciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Anke Busch
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | - Heike Hänel
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | - Kerstin Tretow
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | - Mareen Welzel
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | | | - Martin M Möckel
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany
| | - Kathi Zarnack
- Buchmann Institute for Molecular Life Sciences & Institute of Molecular Biosciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany; CardioPulmonary Institute (CPI), 35392 Gießen, Germany
| | - Ingo Ebersberger
- Applied Bioinformatics Group, Institute of Cell Biology and Neuroscience, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany; Senckenberg Biodiversity and Climate Research Center (S-BIK-F), 60325 Frankfurt am Main, Germany; LOEWE Center for Translational Biodiversity Genomics (TBG), 60325 Frankfurt am Main, Germany
| | - Stefan Legewie
- Department of Systems Biology, Institute for Biomedical Genetics (IBMG), University of Stuttgart, 70569 Stuttgart, Germany; Stuttgart Research Center for Systems Biology (SRCSB), University of Stuttgart, 70569 Stuttgart, Germany
| | - Katja Luck
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany.
| | - Michael Sattler
- Institute of Structural Biology, Helmholtz Center Munich, 85764 Neuherberg, Germany; Bavarian NMR Center, Department of Bioscience, School of Natural Sciences, Technical University of Munich, 85747 Garching, Germany.
| | - Julian König
- Institute of Molecular Biology (IMB) gGmbH, 55128 Mainz, Germany.
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34
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West C, Capitanchik C, Cheshire C, Luscombe NM, Chakrabarti A, Ule J. nf-core/clipseq - a robust Nextflow pipeline for comprehensive CLIP data analysis. Wellcome Open Res 2023; 8:286. [PMID: 37829674 PMCID: PMC10565428 DOI: 10.12688/wellcomeopenres.19453.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2023] [Indexed: 10/14/2023] Open
Abstract
Crosslinking and immunoprecipitation (CLIP) technologies have become a central component of the molecular biologists' toolkit to study protein-RNA interactions and thus to uncover core principles of RNA biology. There has been a proliferation of CLIP-based experimental protocols, as well as computational tools, especially for peak-calling. Consequently, there is an urgent need for a well-documented bioinformatic pipeline that enshrines the principles of robustness, reproducibility, scalability, portability and flexibility while embracing the diversity of experimental and computational CLIP tools. To address this, we present nf-core/clipseq - a robust Nextflow pipeline for quality control and analysis of CLIP sequencing data. It is part of the international nf-core community effort to develop and curate a best-practice, gold-standard set of pipelines for data analysis. The standards enabled by Nextflow and nf-core, including workflow management, version control, continuous integration and containerisation ensure that these key needs are met. Furthermore, multiple tools are implemented ( e.g. for peak-calling), alongside visualisation of quality control metrics to empower the user to make their own informed decisions based on their data. nf-core/clipseq remains under active development, with plans to incorporate newly released tools to ensure that pipeline remains up-to-date and relevant for the community. Engagement with users and developers is encouraged through the nf-core GitHub repository and Slack channel to promote collaboration. It is available at https://nf-co.re/clipseq.
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Affiliation(s)
| | - Charlotte Capitanchik
- The Francis Crick Institute, London, England, UK
- Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | | | - Nicholas M. Luscombe
- The Francis Crick Institute, London, England, UK
- Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | | | - Jernej Ule
- The Francis Crick Institute, London, England, UK
- UK Dementia Research Institute at King's College London, London, UK
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35
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Prall W, Ganguly DR, Gregory BD. The covalent nucleotide modifications within plant mRNAs: What we know, how we find them, and what should be done in the future. THE PLANT CELL 2023; 35:1801-1816. [PMID: 36794718 PMCID: PMC10226571 DOI: 10.1093/plcell/koad044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/16/2022] [Accepted: 01/09/2023] [Indexed: 05/30/2023]
Abstract
Although covalent nucleotide modifications were first identified on the bases of transfer RNAs (tRNAs) and ribosomal RNAs (rRNAs), a number of these epitranscriptome marks have also been found to occur on the bases of messenger RNAs (mRNAs). These covalent mRNA features have been demonstrated to have various and significant effects on the processing (e.g. splicing, polyadenylation, etc.) and functionality (e.g. translation, transport, etc.) of these protein-encoding molecules. Here, we focus our attention on the current understanding of the collection of covalent nucleotide modifications known to occur on mRNAs in plants, how they are detected and studied, and the most outstanding future questions of each of these important epitranscriptomic regulatory signals.
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Affiliation(s)
- Wil Prall
- Department of Biology, University of Pennsylvania, School of Arts and Sciences, 433 S. University Ave., Philadelphia, PA 19104, USA
| | - Diep R Ganguly
- Department of Biology, University of Pennsylvania, School of Arts and Sciences, 433 S. University Ave., Philadelphia, PA 19104, USA
| | - Brian D Gregory
- Department of Biology, University of Pennsylvania, School of Arts and Sciences, 433 S. University Ave., Philadelphia, PA 19104, USA
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36
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Aparicio Chacón MV, Van Dingenen J, Goormachtig S. Characterization of Arbuscular Mycorrhizal Effector Proteins. Int J Mol Sci 2023; 24:ijms24119125. [PMID: 37298075 DOI: 10.3390/ijms24119125] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/17/2023] [Accepted: 05/21/2023] [Indexed: 06/12/2023] Open
Abstract
Plants are colonized by various fungi with both pathogenic and beneficial lifestyles. One type of colonization strategy is through the secretion of effector proteins that alter the plant's physiology to accommodate the fungus. The oldest plant symbionts, the arbuscular mycorrhizal fungi (AMF), may exploit effectors to their benefit. Genome analysis coupled with transcriptomic studies in different AMFs has intensified research on the effector function, evolution, and diversification of AMF. However, of the current 338 predicted effector proteins from the AM fungus Rhizophagus irregularis, only five have been characterized, of which merely two have been studied in detail to understand which plant proteins they associate with to affect the host physiology. Here, we review the most recent findings in AMF effector research and discuss the techniques used for the functional characterization of effector proteins, from their in silico prediction to their mode of action, with an emphasis on high-throughput approaches for the identification of plant targets of the effectors through which they manipulate their hosts.
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Affiliation(s)
- María V Aparicio Chacón
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Judith Van Dingenen
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Sofie Goormachtig
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
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37
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Li X, Li C, Zhu J, Zhong S, Zhu H, Zhang X. Functions and mechanisms of RNA helicases in plants. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:2295-2310. [PMID: 36416783 PMCID: PMC10082930 DOI: 10.1093/jxb/erac462] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 11/21/2022] [Indexed: 05/21/2023]
Abstract
RNA helicases (RHs) are a family of ubiquitous enzymes that alter RNA structures and remodel ribonucleoprotein complexes typically using energy from the hydrolysis of ATP. RHs are involved in various aspects of RNA processing and metabolism, exemplified by transcriptional regulation, pre-mRNA splicing, miRNA biogenesis, liquid-liquid phase separation, and rRNA biogenesis, among other molecular processes. Through these mechanisms, RHs contribute to vegetative and reproductive growth, as well as abiotic and biotic stress responses throughout the life cycle in plants. In this review, we systematically characterize RH-featured domains and signature motifs in Arabidopsis. We also summarize the functions and mechanisms of RHs in various biological processes in plants with a focus on DEAD-box and DEAH-box RNA helicases, aiming to present the latest understanding of RHs in plant biology.
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Affiliation(s)
- Xindi Li
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Changhao Li
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Jiaying Zhu
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Songxiao Zhong
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Hongliang Zhu
- College of Food Science and Nutritional Engineering, China Agricultural University, 100083 Beijing, China
| | - Xiuren Zhang
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
- Department of Biology, College of Science, Texas A&M University, College Station, TX 77843, USA
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38
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Segal D, Maier S, Mastromarco GJ, Qian WW, Nabeel-Shah S, Lee H, Moore G, Lacoste J, Larsen B, Lin ZY, Selvabaskaran A, Liu K, Smibert C, Zhang Z, Greenblatt J, Peng J, Lee HO, Gingras AC, Taipale M. A central chaperone-like role for 14-3-3 proteins in human cells. Mol Cell 2023; 83:974-993.e15. [PMID: 36931259 DOI: 10.1016/j.molcel.2023.02.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 11/30/2022] [Accepted: 02/15/2023] [Indexed: 03/18/2023]
Abstract
14-3-3 proteins are highly conserved regulatory proteins that interact with hundreds of structurally diverse clients and act as central hubs of signaling networks. However, how 14-3-3 paralogs differ in specificity and how they regulate client protein function are not known for most clients. Here, we map the interactomes of all human 14-3-3 paralogs and systematically characterize the effect of disrupting these interactions on client localization. The loss of 14-3-3 binding leads to the coalescence of a large fraction of clients into discrete foci in a client-specific manner, suggesting a central chaperone-like function for 14-3-3 proteins. Congruently, the engraftment of 14-3-3 binding motifs to nonclients can suppress their aggregation or phase separation. Finally, we show that 14-3-3s negatively regulate the localization of the RNA-binding protein SAMD4A to cytoplasmic granules and inhibit its activity as a translational repressor. Our work suggests that 14-3-3s have a more prominent role as chaperone-like molecules than previously thought.
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Affiliation(s)
- Dmitri Segal
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Stefan Maier
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health System, Toronto, ON M5G 1X5, Canada
| | | | - Wesley Wei Qian
- Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Syed Nabeel-Shah
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Hyunmin Lee
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Computer Science, University of Toronto, Toronto, ON M5S 3G4, Canada
| | - Gaelen Moore
- Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Jessica Lacoste
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Brett Larsen
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health System, Toronto, ON M5G 1X5, Canada
| | - Zhen-Yuan Lin
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health System, Toronto, ON M5G 1X5, Canada
| | - Abeeshan Selvabaskaran
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Karen Liu
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Craig Smibert
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Zhaolei Zhang
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Computer Science, University of Toronto, Toronto, ON M5S 3G4, Canada
| | - Jack Greenblatt
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Jian Peng
- Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Hyun O Lee
- Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Anne-Claude Gingras
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health System, Toronto, ON M5G 1X5, Canada.
| | - Mikko Taipale
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada.
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Tao X, Li S, Chen G, Wang J, Xu S. Approaches for Modes of Action Study of Long Non-Coding RNAs: From Single Verification to Genome-Wide Determination. Int J Mol Sci 2023; 24:ijms24065562. [PMID: 36982636 PMCID: PMC10054671 DOI: 10.3390/ijms24065562] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
Long non-coding RNAs (lncRNAs) are transcripts longer than 200 nucleotides (nt) that are not translated into known functional proteins. This broad definition covers a large collection of transcripts with diverse genomic origins, biogenesis, and modes of action. Thus, it is very important to choose appropriate research methodologies when investigating lncRNAs with biological significance. Multiple reviews to date have summarized the mechanisms of lncRNA biogenesis, their localization, their functions in gene regulation at multiple levels, and also their potential applications. However, little has been reviewed on the leading strategies for lncRNA research. Here, we generalize a basic and systemic mind map for lncRNA research and discuss the mechanisms and the application scenarios of ‘up-to-date’ techniques as applied to molecular function studies of lncRNAs. Taking advantage of documented lncRNA research paradigms as examples, we aim to provide an overview of the developing techniques for elucidating lncRNA interactions with genomic DNA, proteins, and other RNAs. In the end, we propose the future direction and potential technological challenges of lncRNA studies, focusing on techniques and applications.
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Affiliation(s)
- Xiaoyuan Tao
- Xianghu Laboratory, Hangzhou 311231, China
- Central Laboratory, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Sujuan Li
- Central Laboratory, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Guang Chen
- Central Laboratory, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jian Wang
- Central Laboratory, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Shengchun Xu
- Xianghu Laboratory, Hangzhou 311231, China
- Central Laboratory, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
- Correspondence:
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Eldeeb M, Yuan O, Guzzi N, Thi Ngoc PC, Konturek-Ciesla A, Kristiansen TA, Muthukumar S, Magee J, Bellodi C, Yuan J, Bryder D. A fetal tumor suppressor axis abrogates MLL-fusion-driven acute myeloid leukemia. Cell Rep 2023; 42:112099. [PMID: 36763502 DOI: 10.1016/j.celrep.2023.112099] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/16/2022] [Accepted: 01/26/2023] [Indexed: 02/11/2023] Open
Abstract
MLL-rearrangements (MLL-r) are recurrent genetic events in acute myeloid leukemia (AML) and frequently associate with poor prognosis. In infants, MLL-r can be sufficient to drive transformation. However, despite the prenatal origin of MLL-r in these patients, congenital leukemia is very rare with transformation usually occurring postnatally. The influence of prenatal signals on leukemogenesis, such as those mediated by the fetal-specific protein LIN28B, remains controversial. Here, using a dual-transgenic mouse model that co-expresses MLL-ENL and LIN28B, we investigate the impact of LIN28B on AML. LIN28B impedes the progression of MLL-r AML through compromised leukemia-initiating cell activity and suppression of MYB signaling. Mechanistically, LIN28B directly binds to MYBBP1A mRNA, resulting in elevated protein levels of this MYB co-repressor. Functionally, overexpression of MYBBP1A phenocopies the tumor-suppressor effects of LIN28B, while its perturbation omits it. Thereby, we propose that developmentally restricted expression of LIN28B provides a layer of protection against MYB-dependent AML.
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Affiliation(s)
- Mohamed Eldeeb
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Ouyang Yuan
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Nicola Guzzi
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Phuong Cao Thi Ngoc
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Anna Konturek-Ciesla
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Trine A Kristiansen
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Sowndarya Muthukumar
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Jeffrey Magee
- Division of Hematology and Oncology, Department of Pediatrics, Washington University School of Medicine, 660 S. Euclid Avenue, St. Louis, MO 63110, USA
| | - Cristian Bellodi
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - Joan Yuan
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden
| | - David Bryder
- Division of Molecular Hematology, Department of Laboratory Medicine, Lund Stem Cell Center, Faculty of Medical, Lund University, 221 84 Lund, Sweden.
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41
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Temporal-iCLIP captures co-transcriptional RNA-protein interactions. Nat Commun 2023; 14:696. [PMID: 36755023 PMCID: PMC9908952 DOI: 10.1038/s41467-023-36345-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 01/27/2023] [Indexed: 02/10/2023] Open
Abstract
Dynamic RNA-protein interactions govern the co-transcriptional packaging of RNA polymerase II (RNAPII)-derived transcripts. Yet, our current understanding of this process in vivo primarily stems from steady state analysis. To remedy this, we here conduct temporal-iCLIP (tiCLIP), combining RNAPII transcriptional synchronisation with UV cross-linking of RNA-protein complexes at serial timepoints. We apply tiCLIP to the RNA export adaptor, ALYREF; a component of the Nuclear Exosome Targeting (NEXT) complex, RBM7; and the nuclear cap binding complex (CBC). Regardless of function, all tested factors interact with nascent RNA as it exits RNAPII. Moreover, we demonstrate that the two transesterification steps of pre-mRNA splicing temporally separate ALYREF and RBM7 binding to splicing intermediates, and that exon-exon junction density drives RNA 5'end binding of ALYREF. Finally, we identify underappreciated steps in snoRNA 3'end processing performed by RBM7. Altogether, our data provide a temporal view of RNA-protein interactions during the early phases of transcription.
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42
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Mlynarczyk C, Teater M, Pae J, Chin CR, Wang L, Arulraj T, Barisic D, Papin A, Hoehn KB, Kots E, Ersching J, Bandyopadhyay A, Barin E, Poh HX, Evans CM, Chadburn A, Chen Z, Shen H, Isles HM, Pelzer B, Tsialta I, Doane AS, Geng H, Rehman MH, Melnick J, Morgan W, Nguyen DTT, Elemento O, Kharas MG, Jaffrey SR, Scott DW, Khelashvili G, Meyer-Hermann M, Victora GD, Melnick A. BTG1 mutation yields supercompetitive B cells primed for malignant transformation. Science 2023; 379:eabj7412. [PMID: 36656933 PMCID: PMC10515739 DOI: 10.1126/science.abj7412] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 12/12/2022] [Indexed: 01/21/2023]
Abstract
Multicellular life requires altruistic cooperation between cells. The adaptive immune system is a notable exception, wherein germinal center B cells compete vigorously for limiting positive selection signals. Studying primary human lymphomas and developing new mouse models, we found that mutations affecting BTG1 disrupt a critical immune gatekeeper mechanism that strictly limits B cell fitness during antibody affinity maturation. This mechanism converted germinal center B cells into supercompetitors that rapidly outstrip their normal counterparts. This effect was conferred by a small shift in MYC protein induction kinetics but resulted in aggressive invasive lymphomas, which in humans are linked to dire clinical outcomes. Our findings reveal a delicate evolutionary trade-off between natural selection of B cells to provide immunity and potentially dangerous features that recall the more competitive nature of unicellular organisms.
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Affiliation(s)
- Coraline Mlynarczyk
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Matt Teater
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Juhee Pae
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, USA
| | - Christopher R. Chin
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
- Tri-Institutional PhD Program in Computational Biomedicine, New York, NY, USA
- Institute for Computational Biomedicine, Weill Cornell Medicine, New York, NY, USA
| | - Ling Wang
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Theinmozhi Arulraj
- Department of Systems Immunology and Braunschweig Integrated Centre of Systems Biology (BRICS), Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Darko Barisic
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Antonin Papin
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Kenneth B. Hoehn
- Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Ekaterina Kots
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Jonatan Ersching
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, USA
| | - Arnab Bandyopadhyay
- Department of Systems Immunology and Braunschweig Integrated Centre of Systems Biology (BRICS), Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Ersilia Barin
- Department of Pharmacology and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Hui Xian Poh
- Department of Pharmacology and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Chiara M. Evans
- Molecular Pharmacology Program and Center for Cell Engineering, Center for Stem Cell Biology, Center for Experimental Therapeutics, and Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
| | - Amy Chadburn
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Zhengming Chen
- Division of Biostatistics, Department of Population Health Sciences, Weill Cornell Medicine, New York, NY, USA
| | - Hao Shen
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Hannah M. Isles
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Benedikt Pelzer
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Ioanna Tsialta
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Ashley S. Doane
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Institute for Computational Biomedicine, Weill Cornell Medicine, New York, NY, USA
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Muhammad Hassan Rehman
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Weill Cornell Medicine–Qatar, Doha, Qatar
| | - Jonah Melnick
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Wyatt Morgan
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - Diu T. T. Nguyen
- Molecular Pharmacology Program and Center for Cell Engineering, Center for Stem Cell Biology, Center for Experimental Therapeutics, and Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Olivier Elemento
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
- Caryl and Israel Englander Institute for Precision Medicine and Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Michael G. Kharas
- Molecular Pharmacology Program and Center for Cell Engineering, Center for Stem Cell Biology, Center for Experimental Therapeutics, and Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Samie R. Jaffrey
- Department of Pharmacology and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - David W. Scott
- Centre for Lymphoid Cancer, BC Cancer, Vancouver, BC, Canada
| | - George Khelashvili
- Institute for Computational Biomedicine, Weill Cornell Medicine, New York, NY, USA
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Michael Meyer-Hermann
- Department of Systems Immunology and Braunschweig Integrated Centre of Systems Biology (BRICS), Helmholtz Centre for Infection Research, Braunschweig, Germany
- Institute for Biochemistry, Biotechnology and Bioinformatics, Technische Universität Braunschweig, Braunschweig, Germany
| | - Gabriel D. Victora
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, USA
| | - Ari Melnick
- Division of Hematology and Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
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de Oliveira Freitas Machado C, Schafranek M, Brüggemann M, Hernández Cañás M, Keller M, Di Liddo A, Brezski A, Blümel N, Arnold B, Bremm A, Wittig I, Jaé N, McNicoll F, Dimmeler S, Zarnack K, Müller-McNicoll M. Poison cassette exon splicing of SRSF6 regulates nuclear speckle dispersal and the response to hypoxia. Nucleic Acids Res 2023; 51:870-890. [PMID: 36620874 PMCID: PMC9881134 DOI: 10.1093/nar/gkac1225] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 12/06/2022] [Accepted: 12/10/2022] [Indexed: 01/10/2023] Open
Abstract
Hypoxia induces massive changes in alternative splicing (AS) to adapt cells to the lack of oxygen. Here, we identify the splicing factor SRSF6 as a key factor in the AS response to hypoxia. The SRSF6 level is strongly reduced in acute hypoxia, which serves a dual purpose: it allows for exon skipping and triggers the dispersal of nuclear speckles. Our data suggest that cells use dispersal of nuclear speckles to reprogram their gene expression during hypoxic adaptation and that SRSF6 plays an important role in cohesion of nuclear speckles. Down-regulation of SRSF6 is achieved through inclusion of a poison cassette exon (PCE) promoted by SRSF4. Removing the PCE 3' splice site using CRISPR/Cas9 abolishes SRSF6 reduction in hypoxia. Aberrantly high SRSF6 levels in hypoxia attenuate hypoxia-mediated AS and impair dispersal of nuclear speckles. As a consequence, proliferation and genomic instability are increased, while the stress response is suppressed. The SRSF4-PCE-SRSF6 hypoxia axis is active in different cancer types, and high SRSF6 expression in hypoxic tumors correlates with a poor prognosis. We propose that the ultra-conserved PCE of SRSF6 acts as a tumor suppressor and that its inclusion in hypoxia is crucial to reduce SRSF6 levels. This may prevent tumor cells from entering the metastatic route of hypoxia adaptation.
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Affiliation(s)
- Camila de Oliveira Freitas Machado
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany,Institute of Cardiovascular Regeneration, Goethe University, Frankfurt am Main, Germany
| | - Michal Schafranek
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany
| | - Mirko Brüggemann
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany,Buchmann Institute for Molecular Life Sciences (BMLS), Frankfurt am Main, Germany
| | | | - Mario Keller
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany,Buchmann Institute for Molecular Life Sciences (BMLS), Frankfurt am Main, Germany
| | - Antonella Di Liddo
- Buchmann Institute for Molecular Life Sciences (BMLS), Frankfurt am Main, Germany
| | - Andre Brezski
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany,Buchmann Institute for Molecular Life Sciences (BMLS), Frankfurt am Main, Germany
| | - Nicole Blümel
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany
| | - Benjamin Arnold
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany
| | - Anja Bremm
- Institute of Biochemistry II, Goethe University, Frankfurt am Main, Germany
| | - Ilka Wittig
- Functional Proteomics, Institute of Cardiovascular Physiology, Goethe University, Frankfurt am Main, Germany
| | - Nicolas Jaé
- Institute of Cardiovascular Regeneration, Goethe University, Frankfurt am Main, Germany
| | - François McNicoll
- Institute of Molecular Biosciences, Goethe University, Frankfurt am Main, Germany
| | - Stefanie Dimmeler
- Institute of Cardiovascular Regeneration, Goethe University, Frankfurt am Main, Germany
| | - Kathi Zarnack
- Correspondence may also be addressed to Kathi Zarnack.
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Martinez De La Cruz B, Darsinou M, Riccio A. From form to function: m 6A methylation links mRNA structure to metabolism. Adv Biol Regul 2023; 87:100926. [PMID: 36513580 PMCID: PMC10585597 DOI: 10.1016/j.jbior.2022.100926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/17/2022] [Accepted: 11/03/2022] [Indexed: 11/19/2022]
Abstract
Reversible N6-methyladenosine (m6A) RNA modification is a posttranscriptional epigenetic modification of the RNA that regulates many key aspects of RNA metabolism and function. In this review, we highlight major recent advances in the field, with special emphasis on the potential link between m6A modifications and RNA structure. We will also discuss the role of RNA methylation of neuronal transcripts, and the emerging evidence of a potential role in RNA transport and local translation in dendrites and axons of transcripts involved in synaptic functions and axon growth.
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Affiliation(s)
| | - Marousa Darsinou
- UCL Laboratory for Molecular Cell Biology - University College London, Gower Street, WC1E 6BT, London, UK
| | - Antonella Riccio
- UCL Laboratory for Molecular Cell Biology - University College London, Gower Street, WC1E 6BT, London, UK.
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45
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Sobeh AM, Eichhorn CD. C-terminal determinants for RNA binding motif 7 protein stability and RNA recognition. Biophys Chem 2023; 292:106928. [PMID: 36427363 PMCID: PMC9768861 DOI: 10.1016/j.bpc.2022.106928] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 10/13/2022] [Accepted: 10/30/2022] [Indexed: 11/09/2022]
Abstract
The 7SK ribonucleoprotein (RNP) is a critical regulator of eukaryotic transcription. Recently, RNA binding motif 7 (RBM7) containing an RNA recognition motif (RRM) was reported to associate with 7SK RNA and core 7SK RNP protein components in response to DNA damage. However, little is known about the mode of RBM7-7SK RNA recognition. Here, we found that RRM constructs containing extended C-termini have increased solubility compared to a minimal RRM construct, although these constructs aggregate in a temperature and concentration-dependent manner. Using solution NMR dynamics experiments, we identified additional structural features observed previously in crystal but not in solution structures. To identify potential RBM7-7SK RNA binding sites, we analyzed deposited data from in cellulo crosslinking experiments and found that RBM7 primarily crosslinks to the distal region of 7SK stem-loop 3 (SL3). Electrophoretic mobility shift assays and NMR chemical shift perturbation experiments showed weak binding to 7SK SL3 constructs in vitro. Together, these results provide new insights into RBM7 RRM folding and recognition of 7SK RNA.
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Affiliation(s)
- Amr M Sobeh
- Department of Chemistry, University of Nebraska, 639 North 12th St, Lincoln, NE 68588, USA
| | - Catherine D Eichhorn
- Department of Chemistry, University of Nebraska, 639 North 12th St, Lincoln, NE 68588, USA.
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46
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Cheng S, Park M, Yong J. RNA and Protein Interactomes of an RNA-Binding Protein Tagged with FLAG Epitopes Using Combinatory Approaches of Genome Engineering and Stable Transfection. Methods Mol Biol 2023; 2666:247-263. [PMID: 37166670 DOI: 10.1007/978-1-0716-3191-1_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
To study the function of RNA-binding proteins (RBPs), an overexpression or knockout approach is generally used. However, as many RBPs are essential to cellular functions, the complete knockout of these proteins may be lethal to the cell. Overexpression of RBPs, on the other hand, may create an altered transcriptome and aberrant phenotypes that can mask their physiological function. Additionally, biochemical characterization of RBP often requires highly specific antibodies for efficient immunoprecipitation for downstream mass spectrometry or RNA footprinting profiling. To overcome these hurdles, we have developed a strategy to generate cellular systems either using a CRISPR-Cas9-mediated epitope tag knock-in approach or a two-step workflow to first stably express an exogenous Flag-tagged RBP and subsequently knockout the endogenous RBP using CRISPR-Cas9 gene editing. The generation of these cell lines will be beneficial for downstream RNA footprinting studies and mass spectrometry-mediated interactome studies.
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Affiliation(s)
- Sze Cheng
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota Twin Cities, Minneapolis, MN, USA
| | - Meeyeon Park
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota Twin Cities, Minneapolis, MN, USA
| | - Jeongsik Yong
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota Twin Cities, Minneapolis, MN, USA.
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47
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Biancon G, Busarello E, Joshi P, Lesch BJ, Halene S, Tebaldi T. Deconvolution of in vivo protein-RNA contacts using fractionated eCLIP-seq. STAR Protoc 2022; 3:101823. [PMID: 36595959 PMCID: PMC9676202 DOI: 10.1016/j.xpro.2022.101823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/15/2022] [Accepted: 10/06/2022] [Indexed: 11/18/2022] Open
Abstract
Thousands of RNA-binding proteins orchestrate RNA processing and altered protein-RNA interactions frequently lead to disease. Here, we present experimental and computational analysis pipelines of fractionated eCLIP-seq (freCLIP-seq), a modification of enhanced UV-crosslinking and RNA immunoprecipitation followed by sequencing. FreCLIP-seq allows transcriptome-wide analysis of protein-RNA interactions at single-nucleotide level and provides an additional level of resolution by isolating binding signals of individual RNA-binding proteins within a multicomponent complex. Binding occupancy can be inferred from read counts and crosslinking events. For complete details on the use and execution of this protocol, please refer to Biancon et al. (2022).
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Affiliation(s)
- Giulia Biancon
- Section of Hematology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale University School of Medicine, New Haven, CT, USA.
| | - Emma Busarello
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Poorval Joshi
- Section of Hematology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale University School of Medicine, New Haven, CT, USA
| | - Bluma J Lesch
- Department of Genetics, Yale University School of Medicine, New Haven, CT, USA
| | - Stephanie Halene
- Section of Hematology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale University School of Medicine, New Haven, CT, USA; Yale Stem Cell Center, Yale University School of Medicine, New Haven, CT, USA; Yale Center for RNA Science and Medicine, Yale University School of Medicine, New Haven, CT, USA; Department of Pathology, Yale University School of Medicine, New Haven, CT, USA.
| | - Toma Tebaldi
- Section of Hematology, Department of Internal Medicine, Yale Comprehensive Cancer Center, Yale University School of Medicine, New Haven, CT, USA; Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Trento, Italy.
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48
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Jafari-Raddani F, Davoodi-Moghaddam Z, Yousefi AM, Ghaffari SH, Bashash D. An overview of long noncoding RNAs: Biology, functions, therapeutics, analysis methods, and bioinformatics tools. Cell Biochem Funct 2022; 40:800-825. [PMID: 36111699 DOI: 10.1002/cbf.3748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 12/15/2022]
Abstract
Long noncoding RNAs (lncRNAs) are a diverse class of RNAs whose functions are widespread in all branches of life and have been the focus of attention in the last decade. While a huge number of lncRNAs have been identified, there is still much work to be done and plenty to be learned. In the current review, we begin with the biogenesis and function of lncRNAs as they are involved in the different cellular processes from regulating the architecture of chromosomes to controlling translation and post-translation modifications. Questions on how overexpression, mutations, or deficiency of lncRNAs can affect the cellular status and result in the pathogenesis of various human diseases are responded to. Besides, we allocate an overview of several studies, concerning the application of lncRNAs either as diagnostic and prognostic biomarkers or novel therapeutics. We also introduce the currently available techniques to explore details of lncRNAs such as their function, cellular localization, and structure. In the last section, as exponentially growing data in this area need to be gathered and organized in comprehensive databases, we have a particular focus on presenting general and specialized databases. Taken together, with this review, we aim to provide the latest information on different aspects of lncRNAs to highlight their importance in physiopathologic states and take a step towards helping future studies.
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Affiliation(s)
- Farideh Jafari-Raddani
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zeinab Davoodi-Moghaddam
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amir-Mohammad Yousefi
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed H Ghaffari
- Hematology, Oncology and Stem Cell Transplantation Research Center, Shariati Hospital, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Davood Bashash
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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49
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Ansari SA, Dantoft W, Ruiz-Orera J, Syed AP, Blachut S, van Heesch S, Hübner N, Uhlenhaut NH. Integrative analysis of macrophage ribo-Seq and RNA-Seq data define glucocorticoid receptor regulated inflammatory response genes into distinct regulatory classes. Comput Struct Biotechnol J 2022; 20:5622-5638. [PMID: 36284713 PMCID: PMC9582734 DOI: 10.1016/j.csbj.2022.09.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/28/2022] [Accepted: 09/28/2022] [Indexed: 11/03/2022] Open
Abstract
Glucocorticoids such as dexamethasone (Dex) are widely used to treat both acute and chronic inflammatory conditions. They regulate immune responses by dampening cell-mediated immunity in a glucocorticoid receptor (GR)-dependent manner, by suppressing the expression of pro-inflammatory cytokines and chemokines and by stimulating the expression of anti-inflammatory mediators. Despite its evident clinical benefit, the mechanistic underpinnings of the gene regulatory networks transcriptionally controlled by GR in a context-specific manner remain mysterious. Next generation sequencing methods such mRNA sequencing (RNA-seq) and Ribosome profiling (ribo-seq) provide tools to investigate the transcriptional and post-transcriptional mechanisms that govern gene expression. Here, we integrate matched RNA-seq data with ribo-seq data from human acute monocytic leukemia (THP-1) cells treated with the TLR4 ligand lipopolysaccharide (LPS) and with Dex, to investigate the global transcriptional and translational regulation (translational efficiency, ΔTE) of Dex-responsive genes. We find that the expression of most of the Dex-responsive genes are regulated at both the transcriptional and the post-transcriptional level, with the transcriptional changes intensified on the translational level. Overrepresentation pathway analysis combined with STRING protein network analysis and manual functional exploration, identified these genes to encode immune effectors and immunomodulators that contribute to macrophage-mediated immunity and to the maintenance of macrophage-mediated immune homeostasis. Further research into the translational regulatory network underlying the GR anti-inflammatory response could pave the way for the development of novel immunomodulatory therapeutic regimens with fewer undesirable side effects.
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Affiliation(s)
- Suhail A. Ansari
- Institute for Diabetes and Endocrinology (IDE), Helmholtz Center Munich (HMGU) and German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Widad Dantoft
- Institute for Diabetes and Endocrinology (IDE), Helmholtz Center Munich (HMGU) and German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Jorge Ruiz-Orera
- Cardiovascular and Metabolic Sciences, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Afzal P. Syed
- Institute for Diabetes and Endocrinology (IDE), Helmholtz Center Munich (HMGU) and German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Susanne Blachut
- Cardiovascular and Metabolic Sciences, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Sebastiaan van Heesch
- Princess Máxima Center for Pediatric Oncology, Heidelberglaan 25, 3584 CS Utrecht, The Netherlands
| | - Norbert Hübner
- Cardiovascular and Metabolic Sciences, Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany,Charite-Universitätsmedizin Berlin, Berlin, Germany
| | - Nina Henriette Uhlenhaut
- Institute for Diabetes and Endocrinology (IDE), Helmholtz Center Munich (HMGU) and German Center for Diabetes Research (DZD), Neuherberg, Germany,Metabolic Programming, School of Life Sciences Weihenstephan, ZIEL – Institute for Food and Health, Technical University of Munich (TUM), Freising, Germany,Corresponding author.
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50
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Hluchý M, Gajdušková P, Ruiz de Los Mozos I, Rájecký M, Kluge M, Berger BT, Slabá Z, Potěšil D, Weiß E, Ule J, Zdráhal Z, Knapp S, Paruch K, Friedel CC, Blazek D. CDK11 regulates pre-mRNA splicing by phosphorylation of SF3B1. Nature 2022; 609:829-834. [PMID: 36104565 DOI: 10.1038/s41586-022-05204-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 08/08/2022] [Indexed: 11/09/2022]
Abstract
RNA splicing, the process of intron removal from pre-mRNA, is essential for the regulation of gene expression. It is controlled by the spliceosome, a megadalton RNA-protein complex that assembles de novo on each pre-mRNA intron through an ordered assembly of intermediate complexes1,2. Spliceosome activation is a major control step that requires substantial protein and RNA rearrangements leading to a catalytically active complex1-5. Splicing factor 3B subunit 1 (SF3B1) protein-a subunit of the U2 small nuclear ribonucleoprotein6-is phosphorylated during spliceosome activation7-10, but the kinase that is responsible has not been identified. Here we show that cyclin-dependent kinase 11 (CDK11) associates with SF3B1 and phosphorylates threonine residues at its N terminus during spliceosome activation. The phosphorylation is important for the association between SF3B1 and U5 and U6 snRNAs in the activated spliceosome, termed the Bact complex, and the phosphorylation can be blocked by OTS964, a potent and selective inhibitor of CDK11. Inhibition of CDK11 prevents spliceosomal transition from the precatalytic complex B to the activated complex Bact and leads to widespread intron retention and accumulation of non-functional spliceosomes on pre-mRNAs and chromatin. We demonstrate a central role of CDK11 in spliceosome assembly and splicing regulation and characterize OTS964 as a highly selective CDK11 inhibitor that suppresses spliceosome activation and splicing.
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Affiliation(s)
- Milan Hluchý
- Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic
| | - Pavla Gajdušková
- Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic
| | - Igor Ruiz de Los Mozos
- The Francis Crick Institute, London, UK
- Department of Personalized Medicine, NASERTIC, Government of Navarra, Pamplona, Spain
- Center for Applied Medical Research, University of Navarra, Pamplona, Spain
| | - Michal Rájecký
- Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic
| | - Michael Kluge
- Institut für Informatik, Ludwig-Maximilians-Universität München, München, Germany
| | - Benedict-Tilman Berger
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences (BMLS), Goethe University Frankfurt am Main, Frankfurt am Main, Germany
- Institut für Pharmazeutische Chemie, Goethe University Frankfurt am Main, Frankfurt am Main, Germany
| | - Zuzana Slabá
- Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic
| | - David Potěšil
- Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic
| | - Elena Weiß
- Institut für Informatik, Ludwig-Maximilians-Universität München, München, Germany
| | - Jernej Ule
- The Francis Crick Institute, London, UK
- UK Dementia Research Institute, King's College London, London, UK
| | - Zbyněk Zdráhal
- Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic
| | - Stefan Knapp
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences (BMLS), Goethe University Frankfurt am Main, Frankfurt am Main, Germany
- Institut für Pharmazeutische Chemie, Goethe University Frankfurt am Main, Frankfurt am Main, Germany
| | - Kamil Paruch
- Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
- International Clinical Research Center, St Anne's University Hospital in Brno, Brno, Czech Republic
| | - Caroline C Friedel
- Institut für Informatik, Ludwig-Maximilians-Universität München, München, Germany
| | - Dalibor Blazek
- Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic.
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