1
|
Vlok M, Solis N, Sadasivan J, Mohamud Y, Warsaba R, Kizhakkedathu J, Luo H, Overall CM, Jan E. Identification of the proteolytic signature in CVB3-infected cells. J Virol 2024; 98:e0049824. [PMID: 38953667 PMCID: PMC11265341 DOI: 10.1128/jvi.00498-24] [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: 03/26/2024] [Accepted: 05/29/2024] [Indexed: 07/04/2024] Open
Abstract
Coxsackievirus B3 (CVB3) encodes proteinases that are essential for processing of the translated viral polyprotein. Viral proteinases also target host proteins to manipulate cellular processes and evade innate antiviral responses to promote replication and infection. While some host protein substrates of the CVB3 3C and 2A cysteine proteinases have been identified, the full repertoire of targets is not known. Here, we utilize an unbiased quantitative proteomics-based approach termed terminal amine isotopic labeling of substrates (TAILS) to conduct a global analysis of CVB3 protease-generated N-terminal peptides in both human HeLa and mouse cardiomyocyte (HL-1) cell lines infected with CVB3. We identified >800 proteins that are cleaved in CVB3-infected HeLa and HL-1 cells including the viral polyprotein, known substrates of viral 3C proteinase such as PABP, DDX58, and HNRNPs M, K, and D and novel cellular proteins. Network and GO-term analysis showed an enrichment in biological processes including immune response and activation, RNA processing, and lipid metabolism. We validated a subset of candidate substrates that are cleaved under CVB3 infection and some are direct targets of 3C proteinase in vitro. Moreover, depletion of a subset of TAILS-identified target proteins decreased viral yield. Characterization of two target proteins showed that expression of 3Cpro-targeted cleaved fragments of emerin and aminoacyl-tRNA synthetase complex-interacting multifunctional protein 2 modulated autophagy and the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathway, respectively. The comprehensive identification of host proteins targeted during virus infection provides insights into the cellular pathways manipulated to facilitate infection. IMPORTANCE RNA viruses encode proteases that are responsible for processing viral proteins into their mature form. Viral proteases also target and cleave host cellular proteins; however, the full catalog of these target proteins is incomplete. We use a technique called terminal amine isotopic labeling of substrates (TAILS), an N-terminomics to identify host proteins that are cleaved under virus infection. We identify hundreds of cellular proteins that are cleaved under infection, some of which are targeted directly by viral protease. Revealing these target proteins provides insights into the host cellular pathways and antiviral signaling factors that are modulated to promote virus infection and potentially leading to virus-induced pathogenesis.
Collapse
Affiliation(s)
- Marli Vlok
- Department of Biochemistry and Molecular Biology, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nestor Solis
- Department of Oral and Biological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jibin Sadasivan
- Department of Biochemistry and Molecular Biology, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Yasir Mohamud
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- Centre for Heart and Lung Innovation, University of British Columbia, Vancouver, British Columbia, Canada
- St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Reid Warsaba
- Department of Biochemistry and Molecular Biology, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jayachandran Kizhakkedathu
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Honglin Luo
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- Centre for Heart and Lung Innovation, University of British Columbia, Vancouver, British Columbia, Canada
- St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Christopher M. Overall
- Department of Biochemistry and Molecular Biology, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Oral and Biological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- Yonsei Frontier Lab, Yonsei University, Seoul, Republic of Korea
| | - Eric Jan
- Department of Biochemistry and Molecular Biology, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| |
Collapse
|
2
|
Wong CH, Wingett SW, Qian C, Hunter MR, Taliaferro JM, Ross-Thriepland D, Bullock SL. Genome-scale requirements for dynein-based transport revealed by a high-content arrayed CRISPR screen. J Cell Biol 2024; 223:e202306048. [PMID: 38448164 PMCID: PMC10916854 DOI: 10.1083/jcb.202306048] [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: 06/10/2023] [Revised: 01/10/2024] [Accepted: 02/19/2024] [Indexed: 03/08/2024] Open
Abstract
The microtubule motor dynein plays a key role in cellular organization. However, little is known about how dynein's biosynthesis, assembly, and functional diversity are orchestrated. To address this issue, we have conducted an arrayed CRISPR loss-of-function screen in human cells using the distribution of dynein-tethered peroxisomes and early endosomes as readouts. From a genome-wide gRNA library, 195 validated hits were recovered and parsed into those impacting multiple dynein cargoes and those whose effects are restricted to a subset of cargoes. Clustering of high-dimensional phenotypic fingerprints revealed co-functional proteins involved in many cellular processes, including several candidate novel regulators of core dynein functions. Further analysis of one of these factors, the RNA-binding protein SUGP1, indicates that it promotes cargo trafficking by sustaining functional expression of the dynein activator LIS1. Our data represent a rich source of new hypotheses for investigating microtubule-based transport, as well as several other aspects of cellular organization captured by our high-content imaging.
Collapse
Affiliation(s)
- Chun Hao Wong
- Cell Biology Division, Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
- Centre for Genomic Research, Discovery Sciences, AstraZeneca, Cambridge, UK
| | - Steven W. Wingett
- Cell Biology Division, Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Chen Qian
- Quantitative Biology, Discovery Sciences, AstraZeneca, Cambridge, UK
| | - Morag Rose Hunter
- Centre for Genomic Research, Discovery Sciences, AstraZeneca, Cambridge, UK
| | - J. Matthew Taliaferro
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | | | - Simon L. Bullock
- Cell Biology Division, Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| |
Collapse
|
3
|
Kim HS, Kweon J, Kim Y. Recent advances in CRISPR-based functional genomics for the study of disease-associated genetic variants. Exp Mol Med 2024; 56:861-869. [PMID: 38556550 PMCID: PMC11058232 DOI: 10.1038/s12276-024-01212-3] [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: 07/31/2023] [Revised: 01/15/2024] [Accepted: 01/30/2024] [Indexed: 04/02/2024] Open
Abstract
Advances in sequencing technology have greatly increased our ability to gather genomic data, yet understanding the impact of genetic mutations, particularly variants of uncertain significance (VUSs), remains a challenge in precision medicine. The CRISPR‒Cas system has emerged as a pivotal tool for genome engineering, enabling the precise incorporation of specific genetic variations, including VUSs, into DNA to facilitate their functional characterization. Additionally, the integration of CRISPR‒Cas technology with sequencing tools allows the high-throughput evaluation of mutations, transforming uncertain genetic data into actionable insights. This allows researchers to comprehensively study the functional consequences of point mutations, paving the way for enhanced understanding and increasing application to precision medicine. This review summarizes the current genome editing tools utilizing CRISPR‒Cas systems and their combination with sequencing tools for functional genomics, with a focus on point mutations.
Collapse
Affiliation(s)
- Heon Seok Kim
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea
- Hanyang Institute of Bioscience and Biotechnology, Hanyang University, Seoul, Republic of Korea
- Hanyang Institute of Advanced BioConvergence, Hanyang University, Seongdong-gu, Seoul, Republic of Korea
| | - Jiyeon Kweon
- Department of Cell and Genetic Engineering, Asan Medical Institute of Convergence Science and Technology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Yongsub Kim
- Department of Cell and Genetic Engineering, Asan Medical Institute of Convergence Science and Technology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
- Stem Cell Immunomodulation Research Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| |
Collapse
|
4
|
Hou J, Wei Y, Zou J, Jaffery R, Sun L, Liang S, Zheng N, Guerrero AM, Egan NA, Bohat R, Chen S, Zheng C, Mao X, Yi SS, Chen K, McGrail DJ, Sahni N, Shi PY, Chen Y, Xie X, Peng W. Integrated multi-omics analyses identify anti-viral host factors and pathways controlling SARS-CoV-2 infection. Nat Commun 2024; 15:109. [PMID: 38168026 PMCID: PMC10761986 DOI: 10.1038/s41467-023-44175-1] [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: 08/03/2022] [Accepted: 12/04/2023] [Indexed: 01/05/2024] Open
Abstract
Host anti-viral factors are essential for controlling SARS-CoV-2 infection but remain largely unknown due to the biases of previous large-scale studies toward pro-viral host factors. To fill in this knowledge gap, we perform a genome-wide CRISPR dropout screen and integrate analyses of the multi-omics data of the CRISPR screen, genome-wide association studies, single-cell RNA-Seq, and host-virus proteins or protein/RNA interactome. This study uncovers many host factors that are currently underappreciated, including the components of V-ATPases, ESCRT, and N-glycosylation pathways that modulate viral entry and/or replication. The cohesin complex is also identified as an anti-viral pathway, suggesting an important role of three-dimensional chromatin organization in mediating host-viral interaction. Furthermore, we discover another anti-viral regulator KLF5, a transcriptional factor involved in sphingolipid metabolism, which is up-regulated, and harbors genetic variations linked to COVID-19 patients with severe symptoms. Anti-viral effects of three identified candidates (DAZAP2/VTA1/KLF5) are confirmed individually. Molecular characterization of DAZAP2/VTA1/KLF5-knockout cells highlights the involvement of genes related to the coagulation system in determining the severity of COVID-19. Together, our results provide further resources for understanding the host anti-viral network during SARS-CoV-2 infection and may help develop new countermeasure strategies.
Collapse
Affiliation(s)
- Jiakai Hou
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Yanjun Wei
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jing Zou
- Department of Biochemistry & Molecular Biology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Roshni Jaffery
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Long Sun
- Department of Biochemistry & Molecular Biology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Shaoheng Liang
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Computer Science, Rice University, Houston, TX, USA
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Ningbo Zheng
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Ashley M Guerrero
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Nicholas A Egan
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Ritu Bohat
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Si Chen
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Caishang Zheng
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Xiaobo Mao
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - S Stephen Yi
- Department of Oncology, Livestrong Cancer Institutes, and Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA
- Interdisciplinary Life Sciences Graduate Programs (ILSGP) and Oden Institute for Computational Engineering and Sciences (ICES), The University of Texas at Austin, Austin, TX, USA
| | - Ken Chen
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Daniel J McGrail
- Center for Immunotherapy and Precision Immuno-Oncology, Cleveland Clinic, Cleveland, OH, USA
| | - Nidhi Sahni
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Pei-Yong Shi
- Department of Biochemistry & Molecular Biology, The University of Texas Medical Branch, Galveston, TX, USA.
- Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, TX, USA.
- Sealy Institute for Vaccine Sciences, The University of Texas Medical Branch, Galveston, TX, USA.
- Sealy Center for Structural Biology & Molecular Biophysics, The University of Texas Medical Branch, Galveston, TX, USA.
- Institute for Translational Science, The University of Texas Medical Branch, Galveston, TX, USA.
- Sealy Institute for Drug Discovery, The University of Texas Medical Branch, Galveston, TX, USA.
| | - Yiwen Chen
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
- Quantitative Sciences Program, MD Anderson Cancer Center, UT Health Graduate School of Biomedical Sciences, Houston, TX, USA.
| | - Xuping Xie
- Department of Biochemistry & Molecular Biology, The University of Texas Medical Branch, Galveston, TX, USA.
- Sealy Institute for Drug Discovery, The University of Texas Medical Branch, Galveston, TX, USA.
| | - Weiyi Peng
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA.
| |
Collapse
|
5
|
Yao L, Wang X, Ke R, Chen K, Xie K. FLASH Genome Editing Pipeline: An Efficient and High-Throughput Method to Construct Arrayed CRISPR Library for Plant Functional Genomics. Curr Protoc 2023; 3:e905. [PMID: 37755326 DOI: 10.1002/cpz1.905] [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] [Indexed: 09/28/2023]
Abstract
CRISPR/Cas9 genome editing is a revolutionary technology for plant functional genomics and crop breeding. In this system, the Cas9 nuclease is directed by a guide RNA (gRNA) to cut the DNA target and introduce mutation through error-prone DNA break repair. Owing to its simplicity, CRISPR/Cas9-mediated targeted gene knockout is widely used for high-throughput genetic screening in animal cell cultures and bacteria. However, high-throughput genetic screening using CRISPR/Cas9 is still challenging in plants. We recently established a new approach, named the FLASH genome editing pipeline, to construct an arrayed CRISPR library in plants. In this pipeline, a set of 12 PCR fragments with different lengths (referred to as FLASH tags) are used to index the Cas9/gRNA vectors. Subsequently, a mixture of 12 Agrobacterium strains, in which each strain contained a FLASH-tag indexed vector, was transformed into rice plants. As a result, a unique link between the target gene/gRNA and FLASH tag is generated, which allows reading gRNA information in bacterial strains and gene-edited plants using regular PCR and gel electrophoresis. This protocol includes step-by-step instructions for gRNA design, high throughput assembly of FLASH-tag indexed Cas9/gRNA plasmids, Agrobacterium-mediated transformation of 12 indexed plasmids, and fast assignment of target gene information in primary transformants. The arrayed CRISPR library described here is suitable for small- to large-scale genetic screening and allows fast and comprehensive gene function discovery in plants. © 2023 Wiley Periodicals LLC. Basic Protocol 1: Assembly of FLASH-tag-indexed Cas9/gRNA plasmids Basic Protocol 2: Preparation of the Cas9/gRNA plasmid library Basic Protocol 3: Library preparation of Agrobacterium strains and mixing FLASH-tag indexed strains Basic Protocol 4: Grouped transformation and assignments of gRNA information of gene-edited plants.
Collapse
Affiliation(s)
- Lu Yao
- National Key Laboratory of Crop Genetic Improvement and Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Xiaochun Wang
- National Key Laboratory of Crop Genetic Improvement and Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, People's Republic of China
- Current affiliation: Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, People's Republic of China
| | - Runnan Ke
- National Key Laboratory of Crop Genetic Improvement and Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Kaiyuan Chen
- National Key Laboratory of Crop Genetic Improvement and Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, People's Republic of China
- Current affiliation: Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, People's Republic of China
| | - Kabin Xie
- National Key Laboratory of Crop Genetic Improvement and Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, People's Republic of China
| |
Collapse
|
6
|
Wong CH, Wingett SW, Qian C, Taliaferro JM, Ross-Thriepland D, Bullock SL. Genome-scale requirements for dynein-based trafficking revealed by a high-content arrayed CRISPR screen. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.01.530592. [PMID: 36909483 PMCID: PMC10002790 DOI: 10.1101/2023.03.01.530592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
The cytoplasmic dynein-1 (dynein) motor plays a key role in cellular organisation by transporting a wide variety of cellular constituents towards the minus ends of microtubules. However, relatively little is known about how the biosynthesis, assembly and functional diversity of the motor is orchestrated. To address this issue, we have conducted an arrayed CRISPR loss-of-function screen in human cells using the distribution of dynein-tethered peroxisomes and early endosomes as readouts. From a guide RNA library targeting 18,253 genes, 195 validated hits were recovered and parsed into those impacting multiple dynein cargoes and those whose effects are restricted to a subset of cargoes. Clustering of high-dimensional phenotypic fingerprints generated from multiplexed images revealed co-functional genes involved in many cellular processes, including several candidate novel regulators of core dynein functions. Mechanistic analysis of one of these proteins, the RNA-binding protein SUGP1, provides evidence that it promotes cargo trafficking by sustaining functional expression of the dynein activator LIS1. Our dataset represents a rich source of new hypotheses for investigating microtubule-based transport, as well as several other aspects of cellular organisation that were captured by our high-content imaging.
Collapse
Affiliation(s)
- Chun Hao Wong
- Cell Biology Division, MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK
- Discovery Biology, Discovery Sciences, AstraZeneca, R&D, Cambridge, CB4 0WG, UK
- Current address: Wellcome Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK
| | - Steven W. Wingett
- Cell Biology Division, MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK
| | - Chen Qian
- Quantitative Biology, Discovery Sciences, AstraZeneca, R&D, Cambridge, CB4 0WG, UK
| | - J. Matthew Taliaferro
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | | | - Simon L. Bullock
- Cell Biology Division, MRC Laboratory of Molecular Biology, Cambridge, CB2 0QH, UK
| |
Collapse
|
7
|
Hou J, Wei Y, Zou J, Jaffery R, Liang S, Zheng C, Chen K, Shi PY, Chen Y, Xie X, Peng W. Integrated multi-omics analyses identify key anti-viral host factors and pathways controlling SARS-CoV-2 infection. RESEARCH SQUARE 2022:rs.3.rs-1910932. [PMID: 36032971 PMCID: PMC9413708 DOI: 10.21203/rs.3.rs-1910932/v1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Host anti-viral factors are essential for controlling SARS-CoV-2 infection but remain largely unknown due to the biases of previous large-scale studies toward pro-viral host factors. To fill in this knowledge gap, we performed a genome-wide CRISPR dropout screen and integrated analyses of the multi-omics data of the CRISPR screen, genome-wide association studies, single-cell RNA-seq, and host-virus proteins or protein/RNA interactome. This study has uncovered many host factors that were missed by previous studies, including the components of V-ATPases, ESCRT, and N-glycosylation pathways that modulated viral entry and/or replication. The cohesin complex was also identified as a novel anti-viral pathway, suggesting an important role of three-dimensional chromatin organization in mediating host-viral interaction. Furthermore, we discovered an anti-viral regulator KLF5, a transcriptional factor involved in sphingolipid metabolism, which was up-regulated and harbored genetic variations linked to the COVID-19 patients with severe symptoms. Our results provide a resource for understanding the host anti-viral network during SARS-CoV-2 infection and may help develop new countermeasure strategies.
Collapse
Affiliation(s)
| | - Yanjun Wei
- The University of Texas MD Anderson Cancer Center
| | - Jing Zou
- University of Texas Medical Branch
| | | | | | | | - Ken Chen
- The University of Texas MD Anderson Cancer Center
| | | | - Yiwen Chen
- The University of Texas MD Anderson Cancer Center
| | | | | |
Collapse
|
8
|
Wang Y, Qiao X, Li Y, Yang Q, Wang L, Liu X, Wang H, Shen H. Role of the receptor for activated C kinase 1 during viral infection. Arch Virol 2022; 167:1915-1924. [PMID: 35763066 DOI: 10.1007/s00705-022-05484-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 03/30/2022] [Indexed: 11/29/2022]
Abstract
Viruses can survive only in living cells, where they depend on the host's enzymatic system for survival and reproduction. Virus-host interactions are complex. On the one hand, hosts express host-restricted factors to protect the host cells from viral infections. On the other hand, viruses recruit certain host factors to facilitate their survival and transmission. The identification of host factors critical to viral infection is essential for comprehending the pathogenesis of contagion and developing novel antiviral therapies that specifically target the host. Receptor for activated C kinase 1 (RACK1), an evolutionarily conserved host factor that exists in various eukaryotic organisms, is a promising target for antiviral therapy. This review primarily summarizes the roles of RACK1 in regulating different viral life stages, particularly entry, replication, translation, and release.
Collapse
Affiliation(s)
- Yan Wang
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Xiaorong Qiao
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Yuhan Li
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Qingru Yang
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Lulu Wang
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Xiaolan Liu
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Hua Wang
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Hongxing Shen
- School of Medicine, Jiangsu University, Zhenjiang, 212013, Jiangsu, China.
| |
Collapse
|
9
|
Grosjean N, Le Jean M, Chalot M, Mora-Montes HM, Armengaud J, Gross EM, Blaudez D. Genome-Wide Mutant Screening in Yeast Reveals that the Cell Wall is a First Shield to Discriminate Light From Heavy Lanthanides. Front Microbiol 2022; 13:881535. [PMID: 35663896 PMCID: PMC9162579 DOI: 10.3389/fmicb.2022.881535] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
The rapidly expanding utilization of lanthanides (Ln) for the development of new technologies, green energies, and agriculture has raised concerns regarding their impacts on the environment and human health. The absence of characterization of the underlying cellular and molecular mechanisms regarding their toxicity is a caveat in the apprehension of their environmental impacts. We performed genomic phenotyping and molecular physiology analyses of Saccharomyces cerevisiae mutants exposed to La and Yb to uncover genes and pathways affecting Ln resistance and toxicity. Ln responses strongly differed from well-known transition metal and from common responses mediated by oxidative compounds. Shared response pathways to La and Yb exposure were associated to lipid metabolism, ion homeostasis, vesicular trafficking, and endocytosis, which represents a putative way of entry for Ln. Cell wall organization and related signaling pathways allowed for the discrimination of light and heavy Ln. Mutants in cell wall integrity-related proteins (e.g., Kre1p, Kre6p) or in the activation of secretory pathway and cell wall proteins (e.g., Kex2p, Kex1p) were resistant to Yb but sensitive to La. Exposure of WT yeast to the serine protease inhibitor tosyl phenylalanyl chloromethyl ketone mimicked the phenotype of kex2∆ under Ln, strengthening these results. Our data also suggest that the relative proportions of chitin and phosphomannan could modulate the proportion of functional groups (phosphates and carboxylates) to which La and Yb could differentially bind. Moreover, we showed that kex2∆, kex1∆, kre1∆, and kre6∆ strains were all sensitive to light Ln (La to Eu), while being increasingly resistant to heavier Ln. Finally, shotgun proteomic analyses identified modulated proteins in kex2∆ exposed to Ln, among which several plasmalemma ion transporters that were less abundant and that could play a role in Yb uptake. By combining these different approaches, we unraveled that cell wall components not only act in Ln adsorption but are also active signal effectors allowing cells to differentiate light and heavy Ln. This work paves the way for future investigations to the better understanding of Ln toxicity in higher eukaryotes.
Collapse
Affiliation(s)
- Nicolas Grosjean
- Université de Lorraine, CNRS, LIEC, Nancy, France
- Université de Lorraine, CNRS, LIEC, Metz, France
| | | | - Michel Chalot
- Laboratoire Chrono-Environnement, Université de Bourgogne Franche-Comté, CNRS, Besançon, France
- Université de Lorraine, Nancy, France
| | - Héctor M. Mora-Montes
- Departamento de Biología, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Guanajuato, Mexico
| | - Jean Armengaud
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, Bagnols-sur-Cèze, France
| | | | - Damien Blaudez
- Université de Lorraine, CNRS, LIEC, Nancy, France
- *Correspondence: Damien Blaudez,
| |
Collapse
|
10
|
Chen K, Ke R, Du M, Yi Y, Chen Y, Wang X, Yao L, Liu H, Hou X, Xiong L, Yang Y, Xie K. A FLASH pipeline for arrayed CRISPR library construction and the gene function discovery of rice receptor-like kinases. MOLECULAR PLANT 2022; 15:243-257. [PMID: 34619328 DOI: 10.1016/j.molp.2021.09.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 09/13/2021] [Accepted: 09/29/2021] [Indexed: 05/04/2023]
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR-associated protein 9 (Cas9)-mediated gene editing is revolutionizing plant research and crop breeding. Here, we present an effective and streamlined pipeline for arrayed CRISPR library construction and demonstrate it is suitable for small- to large-scale genome editing in plants. This pipeline introduces artificial PCR fragment-length markers for distinguishing guide RNAs (gRNAs) (FLASH), and a group of 12 constructs harboring different FLASH tags are co-transformed into plants each time. The identities of gRNAs in Agrobacterium mixtures and transgenic plants can therefore be read out by detecting the FLASH tags, a process that requires only conventional PCR and gel electrophoresis rather than sequencing. We generated an arrayed CRISPR library targeting all 1,072 members of the receptor-like kinase (RLK) family in rice. One-shot transformation generated a mutant population that covers gRNAs targeting 955 RLKs, and 74.3% (710/955) of the target genes had three or more independent T0 lines. Our results indicate that the FLASH tags act as bona fide surrogates for the gRNAs and are tightly (92.1%) associated with frameshift mutations in the target genes. In addition, the FLASH pipeline allows for rapid identification of unintended editing events without corresponding T-DNA integrations and generates high-order mutants of closely related RLK genes. Furthermore, we showed that the RLK mutant library enables rapid discovery of defense-related RLK genes. This study introduces an effective pipeline for arrayed CRISPR library construction and provides genome-wide rice RLK mutant resources for functional genomics.
Collapse
Affiliation(s)
- Kaiyuan Chen
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China; Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan 430070, China
| | - Runnan Ke
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Manman Du
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yuqing Yi
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yache Chen
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiaochun Wang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Lu Yao
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hao Liu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China
| | - Xin Hou
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Lizhong Xiong
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China
| | - Yinong Yang
- Department of Plant Pathology and Environmental Microbiology, The Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA
| | - Kabin Xie
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Hubei Hongshan Laboratory, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan 430070, China; Hubei Key Laboratory of Plant Pathology, Huazhong Agricultural University, Wuhan 430070, China; Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan 430070, China.
| |
Collapse
|
11
|
Feldman D, Funk L, Le A, Carlson RJ, Leiken MD, Tsai F, Soong B, Singh A, Blainey PC. Pooled genetic perturbation screens with image-based phenotypes. Nat Protoc 2022; 17:476-512. [PMID: 35022620 PMCID: PMC9654597 DOI: 10.1038/s41596-021-00653-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 10/28/2021] [Indexed: 11/09/2022]
Abstract
Discovery of the genetic components underpinning fundamental and disease-related processes is being rapidly accelerated by combining efficient, programmable genetic engineering with phenotypic readouts of high spatial, temporal and/or molecular resolution. Microscopy is a fundamental tool for studying cell biology, but its lack of high-throughput sequence readouts hinders integration in large-scale genetic screens. Optical pooled screens using in situ sequencing provide massively scalable integration of barcoded lentiviral libraries (e.g., CRISPR perturbation libraries) with high-content imaging assays, including dynamic processes in live cells. The protocol uses standard lentiviral vectors and molecular biology, providing single-cell resolution of phenotype and engineered genotype, scalability to millions of cells and accurate sequence reads sufficient to distinguish >106 perturbations. In situ amplification takes ~2 d, while sequencing can be performed in ~1.5 h per cycle. The image analysis pipeline provided enables fully parallel automated sequencing analysis using a cloud or cluster computing environment.
Collapse
Affiliation(s)
- David Feldman
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Luke Funk
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Anna Le
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Rebecca J Carlson
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - FuNien Tsai
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- 10x Genomics, Pleasanton, CA, USA
| | - Brian Soong
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Avtar Singh
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Cellular and Tissue Genomics, Genentech Inc., South San Francisco, CA, USA
| | - Paul C Blainey
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- Koch Institute for Integrative Cancer Research at MIT, Cambridge, MA, USA.
| |
Collapse
|
12
|
Cellular host factors for SARS-CoV-2 infection. Nat Microbiol 2021; 6:1219-1232. [PMID: 34471255 DOI: 10.1038/s41564-021-00958-0] [Citation(s) in RCA: 106] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 08/03/2021] [Indexed: 02/07/2023]
Abstract
The coronavirus disease 2019 (COVID-19) pandemic has claimed millions of lives and caused a global economic crisis. No effective antiviral drugs are currently available to treat infections of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The medical need imposed by the pandemic has spurred unprecedented research efforts to study coronavirus biology. Every virus depends on cellular host factors and pathways for successful replication. These proviral host factors represent attractive targets for antiviral therapy as they are genetically more stable than viral targets and may be shared among related viruses. The application of various 'omics' technologies has led to the rapid discovery of proviral host factors that are required for the completion of the SARS-CoV-2 life cycle. In this Review, we summarize insights into the proviral host factors that are required for SARS-CoV-2 infection that were mainly obtained using functional genetic and interactome screens. We discuss cellular processes that are important for the SARS-CoV-2 life cycle, as well as parallels with non-coronaviruses. Finally, we highlight host factors that could be targeted by clinically approved molecules and molecules in clinical trials as potential antiviral therapies for COVID-19.
Collapse
|
13
|
Shin HJ, Ku KB, Kim HS, Moon HW, Jeong GU, Hwang I, Yoon GY, Lee S, Lee S, Ahn DG, Kim KD, Kwon YC, Kim BT, Kim SJ, Kim C. Receptor-binding domain of SARS-CoV-2 spike protein efficiently inhibits SARS-CoV-2 infection and attachment to mouse lung. Int J Biol Sci 2021; 17:3786-3794. [PMID: 34671199 PMCID: PMC8495392 DOI: 10.7150/ijbs.61320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/13/2021] [Indexed: 01/05/2023] Open
Abstract
COVID-19, caused by a novel coronavirus, SARS-CoV-2, poses a serious global threat. It was first reported in 2019 in China and has now dramatically spread across the world. It is crucial to develop therapeutics to mitigate severe disease and viral spread. The receptor-binding domains (RBDs) in the spike protein of SARS-CoV and MERS-CoV have shown anti-viral activity in previous reports suggesting that this domain has high potential for development as therapeutics. To evaluate the potential antiviral activity of recombinant SARS-CoV-2 RBD proteins, we determined the RBD residues of SARS-CoV-2 using a homology search with RBD of SARS-CoV. For efficient expression and purification, the signal peptide of spike protein was identified and used to generate constructs expressing recombinant RBD proteins. Highly purified RBD protein fused with the Fc domain of human IgG showed potent anti-viral efficacy, which was better than that of a protein fused with a histidine tag. Intranasally pre-administrated RBD protein also inhibited the attachment of SARS-COV-2 to mouse lungs. These findings indicate that RBD protein could be used for the prevention and treatment of SARS-CoV-2 infection.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Seong-Jun Kim
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, South Korea
| | - Chonsaeng Kim
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, South Korea
| |
Collapse
|
14
|
Mattiazzi Usaj M, Yeung CHL, Friesen H, Boone C, Andrews BJ. Single-cell image analysis to explore cell-to-cell heterogeneity in isogenic populations. Cell Syst 2021; 12:608-621. [PMID: 34139168 DOI: 10.1016/j.cels.2021.05.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 04/26/2021] [Accepted: 05/12/2021] [Indexed: 12/26/2022]
Abstract
Single-cell image analysis provides a powerful approach for studying cell-to-cell heterogeneity, which is an important attribute of isogenic cell populations, from microbial cultures to individual cells in multicellular organisms. This phenotypic variability must be explained at a mechanistic level if biologists are to fully understand cellular function and address the genotype-to-phenotype relationship. Variability in single-cell phenotypes is obscured by bulk readouts or averaging of phenotypes from individual cells in a sample; thus, single-cell image analysis enables a higher resolution view of cellular function. Here, we consider examples of both small- and large-scale studies carried out with isogenic cell populations assessed by fluorescence microscopy, and we illustrate the advantages, challenges, and the promise of quantitative single-cell image analysis.
Collapse
Affiliation(s)
- Mojca Mattiazzi Usaj
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
| | - Clarence Hue Lok Yeung
- The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Helena Friesen
- The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Charles Boone
- The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 3E1, Canada; RIKEN Centre for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Brenda J Andrews
- The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 3E1, Canada.
| |
Collapse
|
15
|
Jones CE, Tan WS, Grey F, Hughes DJ. Discovering antiviral restriction factors and pathways using genetic screens. J Gen Virol 2021; 102. [PMID: 34020727 PMCID: PMC8295917 DOI: 10.1099/jgv.0.001603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Viral infections activate the powerful interferon (IFN) response that induces the expression of several hundred IFN stimulated genes (ISGs). The principal role of this extensive response is to create an unfavourable environment for virus replication and to limit spread; however, untangling the biological consequences of this large response is complicated. In addition to a seemingly high degree of redundancy, several ISGs are usually required in combination to limit infection as individual ISGs often have low to moderate antiviral activity. Furthermore, what ISG or combination of ISGs are antiviral for a given virus is usually not known. For these reasons, and since the function(s) of many ISGs remains unexplored, genome-wide approaches are well placed to investigate what aspects of this response result in an appropriate, virus-specific phenotype. This review discusses the advances screening approaches have provided for the study of host defence mechanisms, including clustered regularly interspaced short palindromic repeats/CRISPR associated protein 9 (CRISPR/Cas9), ISG expression libraries and RNA interference (RNAi) technologies.
Collapse
Affiliation(s)
- Chloe E Jones
- Biomedical Sciences Research Complex, School of Biology, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Wenfang S Tan
- Division of Infection and Immunity, The Roslin Institute, University of Edinburgh, Edinburgh, EH25 9RG, UK
| | - Finn Grey
- Division of Infection and Immunity, The Roslin Institute, University of Edinburgh, Edinburgh, EH25 9RG, UK
| | - David J Hughes
- Biomedical Sciences Research Complex, School of Biology, University of St Andrews, St Andrews, KY16 9ST, UK
| |
Collapse
|
16
|
David F, Davis AM, Gossing M, Hayes MA, Romero E, Scott LH, Wigglesworth MJ. A Perspective on Synthetic Biology in Drug Discovery and Development-Current Impact and Future Opportunities. SLAS DISCOVERY 2021; 26:581-603. [PMID: 33834873 DOI: 10.1177/24725552211000669] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The global impact of synthetic biology has been accelerating, because of the plummeting cost of DNA synthesis, advances in genetic engineering, growing understanding of genome organization, and explosion in data science. However, much of the discipline's application in the pharmaceutical industry remains enigmatic. In this review, we highlight recent examples of the impact of synthetic biology on target validation, assay development, hit finding, lead optimization, and chemical synthesis, through to the development of cellular therapeutics. We also highlight the availability of tools and technologies driving the discipline. Synthetic biology is certainly impacting all stages of drug discovery and development, and the recognition of the discipline's contribution can further enhance the opportunities for the drug discovery and development value chain.
Collapse
Affiliation(s)
- Florian David
- Department of Biology and Biological Engineering, Division of Systems and Synthetic Biology, Chalmers University of Technology, Gothenburg, Sweden
| | - Andrew M Davis
- Discovery Sciences, Biopharmaceutical R&D, AstraZeneca, Cambridge, UK
| | - Michael Gossing
- Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Martin A Hayes
- Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Elvira Romero
- Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Louis H Scott
- Discovery Sciences, Biopharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | | |
Collapse
|
17
|
Jackson T, Belsham GJ. Picornaviruses: A View from 3A. Viruses 2021; 13:v13030456. [PMID: 33799649 PMCID: PMC7999760 DOI: 10.3390/v13030456] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 12/14/2022] Open
Abstract
Picornaviruses are comprised of a positive-sense RNA genome surrounded by a protein shell (or capsid). They are ubiquitous in vertebrates and cause a wide range of important human and animal diseases. The genome encodes a single large polyprotein that is processed to structural (capsid) and non-structural proteins. The non-structural proteins have key functions within the viral replication complex. Some, such as 3Dpol (the RNA dependent RNA polymerase) have conserved functions and participate directly in replicating the viral genome, whereas others, such as 3A, have accessory roles. The 3A proteins are highly divergent across the Picornaviridae and have specific roles both within and outside of the replication complex, which differ between the different genera. These roles include subverting host proteins to generate replication organelles and inhibition of cellular functions (such as protein secretion) to influence virus replication efficiency and the host response to infection. In addition, 3A proteins are associated with the determination of host range. However, recent observations have challenged some of the roles assigned to 3A and suggest that other viral proteins may carry them out. In this review, we revisit the roles of 3A in the picornavirus life cycle. The 3AB precursor and mature 3A have distinct functions during viral replication and, therefore, we have also included discussion of some of the roles assigned to 3AB.
Collapse
Affiliation(s)
- Terry Jackson
- The Pirbright Institute, Pirbright, Woking, Surrey GU24 0NF, UK;
| | - Graham J. Belsham
- Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg, Denmark
- Correspondence:
| |
Collapse
|
18
|
A Crucial Role of ACBD3 Required for Coxsackievirus Infection in Animal Model Developed by AAV-Mediated CRISPR Genome Editing Technique. Viruses 2021; 13:v13020237. [PMID: 33546322 PMCID: PMC7913485 DOI: 10.3390/v13020237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 01/30/2021] [Accepted: 01/31/2021] [Indexed: 12/11/2022] Open
Abstract
Genetic screens using CRISPR/Cas9 have been exploited to discover host–virus interactions. These screens have identified viral dependencies on host proteins during their life cycle and potential antiviral strategies. The acyl-CoA binding domain containing 3 (ACBD3) was identified as an essential host factor for the Coxsackievirus B3 (CVB3) infection. Other groups have also investigated the role of ACBD3 as a host factor for diverse enteroviruses in cultured cells. However, it has not been tested if ACBD3 is required in the animal model of CVB3 infection. Owing to embryonic lethality, conventional knockout mice were not available for in vivo study. As an alternative approach, we used adeno-associated virus (AAV)-mediated CRISPR genome editing to generate mice that lacked ACBD3 within the pancreas, the major target organ for CVB3. Delivery of sgRNAs using self-complementary (sc) AAV8 efficiently induced a loss-of-function mutation in the pancreas of the Cas9 knock-in mice. Loss of ACBD3 in the pancreas resulted in a 100-fold reduction in the CVB3 titer within the pancreas and a noticeable reduction in viral protein expression. These results indicate a crucial function of ACBD3 in CVB3 infection in vivo. AAV-mediated CRISPR genome editing may be applicable to many in vivo studies on the virus–host interaction and identify a novel target for antiviral therapeutics.
Collapse
|
19
|
Kim HS, Hwang GH, Lee HK, Bae T, Park SH, Kim YJ, Lee S, Park JH, Bae S, Hur JK. CReVIS-Seq: A highly accurate and multiplexable method for genome-wide mapping of lentiviral integration sites. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2021; 20:792-800. [PMID: 33768124 PMCID: PMC7961857 DOI: 10.1016/j.omtm.2020.10.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 10/17/2020] [Indexed: 12/16/2022]
Abstract
Lentiviruses have been widely used as a means of transferring exogenous DNAs into human cells to treat various genetic diseases. Lentiviral vectors are fundamentally integrated into the host genome, but their integration sites are generally unpredictable, which may increase the uncertainty for their use in therapeutics. To determine the viral integration sites in the host genome, several PCR-based methods have been developed. However, the sensitivities of the PCR-based methods are highly dependent on the primer sequences, and optimized primer design is required for individual target sites. In order to address this issue, we developed an alternative method for genome-wide mapping of viral insertion sites, named CReVIS-seq (CRISPR-enhanced Viral Integration Site Sequencing). The method is based on the sequential steps: fragmentation of genomic DNAs, in vitro circularization, cleavage of target sequence in a CRISPR guide RNA-specific manner, high-throughput sequencing of the linearized DNA fragments in an unbiased manner, and identification of viral insertion sites via sequence analysis. By design, CReVIS-seq is not affected by biases that could be introduced during the target enrichment step via PCR amplification using site specific primers. Furthermore, we found that multiplexed CReVIS-seq, using collections of different single-guide RNAs (sgRNAs), enables simultaneous identification of multiple target sites and structural variations (i.e., circularized viral genome), in both single cell clones and heterogeneous cell populations.
Collapse
Affiliation(s)
- Heon Seok Kim
- Division of Oncology, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Gue-Ho Hwang
- Department of Chemistry, Hanyang University, Seoul 04763, South Korea.,Research Institute for Natural Sciences, Hanyang University, Seoul 04763, South Korea
| | - Hyomin K Lee
- Department of Medicine, Graduate School, Hanyang University, Seoul 04763, South Korea
| | - Taegeun Bae
- Department of Medicine, Graduate School, Kyung Hee University, Seoul 02447, South Korea
| | - Seong-Ho Park
- Department of Medicine, Graduate School, Hanyang University, Seoul 04763, South Korea
| | - Yong Jun Kim
- Department of Pathology, College of Medicine, Kyung Hee University, Seoul 02447, South Korea.,Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, South Korea
| | - Sun Lee
- Department of Pathology, College of Medicine, Kyung Hee University, Seoul 02447, South Korea.,Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, South Korea
| | - Jae-Hoon Park
- Department of Pathology, College of Medicine, Kyung Hee University, Seoul 02447, South Korea.,Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, South Korea
| | - Sangsu Bae
- Department of Chemistry, Hanyang University, Seoul 04763, South Korea.,Research Institute for Natural Sciences, Hanyang University, Seoul 04763, South Korea
| | - Junho K Hur
- Department of Genetics, College of Medicine, Hanyang University, Seoul 04763, South Korea.,Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul 04763, South Korea
| |
Collapse
|
20
|
Grand Moursel L, Visser M, Servant G, Durmus S, Zuurmond AM. CRISPRing future medicines. Expert Opin Drug Discov 2021; 16:463-473. [PMID: 33322954 DOI: 10.1080/17460441.2021.1850687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Introduction: The ability to engineer mammalian genomes in a quick and cost-effective way has led to rapid adaptation of CRISPR technology in biomedical research. CRISPR-based engineering has the potential to accelerate drug discovery, to support the reduction of high attrition rate in drug development and to enhance development of cell and gene-based therapies.Areas covered: How CRISPR technology is transforming drug discovery is discussed in this review. From target identification to target validation in both in vitro and in vivo models, CRISPR technology is positively impacting the early stages of drug development by providing a straightforward way to genome engineering. This property also attracted attention for CRISPR application in the cell and gene therapy area.Expert opinion: CRISPR technology is rapidly becoming the preferred tool for genome engineering and nowadays it is hard to imagine the drug discovery pipeline without this technology. With the years to come, CRISPR technology will undoubtedly be further refined and will flourish into a mature technology that will play a key role in supporting genome engineering requirements in the drug discovery pipeline as well as in cell and gene therapy development.
Collapse
Affiliation(s)
| | - Mijke Visser
- Charles River Laboratories, Leiden, The Netherlands
| | | | - Selvi Durmus
- Charles River Laboratories, Leiden, The Netherlands
| | | |
Collapse
|
21
|
Taemaitree L, Shivalingam A, El-Sagheer AH, Brown T. "Split-and-Click" sgRNA. Methods Mol Biol 2021; 2162:61-78. [PMID: 32926378 DOI: 10.1007/978-1-0716-0687-2_5] [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] [Indexed: 06/11/2023]
Abstract
CRISPR-Cas9 gene editing is dependent on a programmable single guide RNA (sgRNA) that directs Cas9 endonuclease activity. This RNA is often generated by enzymatic reactions, however the process becomes time-consuming as the number of sgRNAs increases and does not allow the incorporation of chemical modifications that can improve or expand the functionality of CRISPR. Solid-phase RNA synthesis can overcome these issues, but highly pure full-length sgRNA remains at the limits of current synthetic methods. Here, we demonstrate a "split-and-click" approach that separates the sgRNA into its two smaller components - a DNA-targeting ~20-mer RNA and a constant Cas9-binding 79-mer RNA - and chemically ligates them together to generate a biologically active sgRNA. The benefits of our approach lie in the stringent purification of the DNA-targeting 20-mer, the reduced synthesis of the constant 79-mer each time a new sgRNA is required, and the rapid access it provides to custom libraries of sgRNAs.
Collapse
Affiliation(s)
- Lapatrada Taemaitree
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, UK
| | - Arun Shivalingam
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, UK
| | - Afaf H El-Sagheer
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, UK
- Chemistry Branch, Department of Science and Mathematics, Faculty of Petroleum and Mining Engineering, Suez University, Suez, Egypt
| | - Tom Brown
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, UK.
| |
Collapse
|
22
|
Ku KB, Shin HJ, Kim HS, Kim BT, Kim, SJ, Kim C. Repurposing Screens of FDA-Approved Drugs Identify 29 Inhibitors of SARS-CoV-2. J Microbiol Biotechnol 2020; 30:1843-1853. [PMID: 33203821 PMCID: PMC9728307 DOI: 10.4014/jmb.2009.09009] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/09/2020] [Accepted: 11/09/2020] [Indexed: 01/08/2023]
Abstract
COVID-19, caused by the novel coronavirus SARS-CoV-2, has spread globally and caused serious social and economic problems. The WHO has declared this outbreak a pandemic. Currently, there are no approved vaccines or antiviral drugs that prevent SARS-CoV-2 infection. Drugs already approved for clinical use would be ideal candidates for rapid development as COVID-19 treatments. In this work, we screened 1,473 FDA-approved drugs to identify inhibitors of SARS-CoV-2 infection using cell-based assays. The antiviral activity of each compound was measured based on the immunofluorescent staining of infected cells using anti-dsRNA antibody. Twenty-nine drugs among those tested showed antiviral activity against SARS-CoV-2. We report this new list of inhibitors to quickly provide basic information for consideration in developing potential therapies.
Collapse
Affiliation(s)
- Keun Bon Ku
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Hye Jin Shin
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Hae Soo Kim
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Bum-Tae Kim
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Seong-Jun Kim,
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea,S-J.Kim Phone: +82-42-860-7477 E-mail:
| | - Chonsaeng Kim
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea,Corresponding authors C.Kim Phone: +82-42-860-7491 E-mail:
| |
Collapse
|
23
|
Zhang XD, Wang D, Sun S, Zhang H. Issues Of Z-factor and an approach to avoid them for quality control in high-throughput screening studies. Bioinformatics 2020; 36:5299-5303. [PMID: 33346821 DOI: 10.1093/bioinformatics/btaa1049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 12/04/2020] [Accepted: 12/08/2020] [Indexed: 11/14/2022] Open
Abstract
MOTIVATION High throughput screening (HTS) is a vital automation technology in biomedical research in both industry and academia. The well-known z-factor has been widely used as a gatekeeper to assure assay quality in an HTS study. However, many researchers and users may not have realized that z-factor has major issues. RESULTS In this article, the following four major issues are explored and demonstrated so that researchers may use the z-factor appropriately. First, the z-factor violates the Pythagorean Theorem of Statistics. Second, there is no adjustment of sampling error in the application of the z-factor for quality control (QC) in HTS studies. Third, the expectation of the sample-based z-factor does not exist. Fourth, the thresholds in the z-factor based criterion lack a theoretical basis. Here, an approach to avoid these issues was proposed and new QC criteria under homoscedasticity were constructed so that researchers can choose a statistically grounded criterion for QC in the HTS studies. We implemented this approach in an R package and demonstrated its utility in multiple CRISPR/CAS9 or siRNA HTS studies. AVAILABILITY The R package qcSSMDhomo is freely available from GitHub: https://github.com/Karena6688/qcSSMDhomo. The file qcSSMDhomo_1.0.0.tar.gz (for Windows) containing qcSSMDhomo is also available at Bioinformatics online. qcSSMDhomo is distributed under the GNU General Public License. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
Collapse
Affiliation(s)
| | - Dandan Wang
- CRDA, Faculty of Health Sciences, University of Macau, Taipa, Macau
| | - Shixue Sun
- CRDA, Faculty of Health Sciences, University of Macau, Taipa, Macau
| | - Heping Zhang
- Department of Biostatistics, Yale University, New Haven, CT06511, USA
| |
Collapse
|
24
|
Krey K, Babnis AW, Pichlmair A. System-Based Approaches to Delineate the Antiviral Innate Immune Landscape. Viruses 2020; 12:E1196. [PMID: 33096788 PMCID: PMC7589202 DOI: 10.3390/v12101196] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/19/2020] [Accepted: 10/19/2020] [Indexed: 12/12/2022] Open
Abstract
Viruses pose substantial challenges for society, economy, healthcare systems, and research. Their distinctive pathologies are based on specific interactions with cellular factors. In order to develop new antiviral treatments, it is of central importance to understand how viruses interact with their host and how infected cells react to the virus on a molecular level. Invading viruses are commonly sensed by components of the innate immune system, which is composed of a highly effective yet complex network of proteins that, in most cases, mediate efficient virus inhibition. Central to this process is the activity of interferons and other cytokines that coordinate the antiviral response. So far, numerous methods have been used to identify how viruses interact with cellular processes and revealed that the innate immune response is highly complex and involves interferon-stimulated genes and their binding partners as functional factors. Novel approaches and careful experimental design, combined with large-scale, high-throughput methods and cutting-edge analysis pipelines, have to be utilized to delineate the antiviral innate immune landscape at a global level. In this review, we describe different currently used screening approaches, how they contributed to our knowledge on virus-host interactions, and essential considerations that have to be taken into account when planning such experiments.
Collapse
Affiliation(s)
- Karsten Krey
- School of Medicine, Institute of Virology, Technical University of Munich, 81675 Munich, Germany; (K.K.); (A.W.B.)
| | - Aleksandra W. Babnis
- School of Medicine, Institute of Virology, Technical University of Munich, 81675 Munich, Germany; (K.K.); (A.W.B.)
| | - Andreas Pichlmair
- School of Medicine, Institute of Virology, Technical University of Munich, 81675 Munich, Germany; (K.K.); (A.W.B.)
- German Center for Infection Research (DZIF), Munich Partner Site, 80538 Munich, Germany
| |
Collapse
|
25
|
O'Shea P, Wildenhain J, Leveridge M, Revankar C, Yang JP, Bradley J, Firth M, Pilling J, Piper D, Chesnut J, Isherwood B. A Novel Screening Approach for the Dissection of Cellular Regulatory Networks of NF-κB Using Arrayed CRISPR gRNA Libraries. SLAS DISCOVERY : ADVANCING LIFE SCIENCES R & D 2020; 25:618-633. [PMID: 32476557 DOI: 10.1177/2472555220926160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
CRISPR/Cas9 is increasingly being used as a tool to prosecute functional genomic screens. However, it is not yet possible to apply the approach at scale across a full breadth of cell types and endpoints. In order to address this, we developed a novel and robust workflow for array-based lentiviral CRISPR/Cas9 screening. We utilized a β-lactamase reporter gene assay to investigate mediators of TNF-α-mediated NF-κB signaling. The system was adapted for CRISPR/Cas9 through the development of a cell line stably expressing Cas9 and application of a lentiviral gRNA library comprising mixtures of four gRNAs per gene. We screened a 743-gene kinome library whereupon hits were independently ranked by percent inhibition, Z' score, strictly standardized mean difference, and T statistic. A consolidated and optimized ranking was generated using Borda-based methods. Screening data quality was above acceptable limits (Z' ≥ 0.5). In order to determine the contribution of individual gRNAs and to better understand false positives and negatives, a subset of gRNAs, against 152 genes, were profiled in singlicate format. We highlight the use of known reference genes and high-throughput, next-generation amplicon and RNA sequencing to assess screen data quality. Screening with singlicate gRNAs was more successful than screening with mixtures at identifying genes with known regulatory roles in TNF-α-mediated NF-κB signaling and was found to be superior to previous RNAi-based methods. These results add to the available data on TNF-α-mediated NF-κB signaling and establish a high-throughput functional genomic screening approach, utilizing a vector-based arrayed gRNA library, applicable across a wide variety of endpoints and cell types at a genome-wide scale.
Collapse
Affiliation(s)
- Patrick O'Shea
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | | | - Mathew Leveridge
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | | | | | - Jenna Bradley
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | - Mike Firth
- Quantitative Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | - James Pilling
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| | | | | | - Beverley Isherwood
- Discovery Biology, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge, UK
| |
Collapse
|
26
|
Guerriero ML, Corrigan A, Bornot A, Firth M, O'Shea P, Ross-Thriepland D, Peel S. Delivering Robust Candidates to the Drug Pipeline through Computational Analysis of Arrayed CRISPR Screens. SLAS DISCOVERY : ADVANCING LIFE SCIENCES R & D 2020; 25:646-654. [PMID: 32394775 DOI: 10.1177/2472555220921132] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Genome-wide arrayed CRISPR screening is a powerful method for drug target identification as it enables exploration of the effect of individual gene perturbations using diverse highly multiplexed functional and phenotypic assays. Using high-content imaging, we can measure changes in biomarker expression, intracellular localization, and cell morphology. Here we present the computational pipeline we have developed to support the analysis and interpretation of arrayed CRISPR screens. This includes evaluating the quality of guide RNA libraries, performing image analysis, evaluating assay results quality, data processing, hit identification, ranking, visualization, and biological interpretation.
Collapse
Affiliation(s)
- Maria Luisa Guerriero
- Data Sciences & Quantitative Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Adam Corrigan
- Data Sciences & Quantitative Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Aurélie Bornot
- Data Sciences & Quantitative Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Mike Firth
- Data Sciences & Quantitative Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Patrick O'Shea
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, Cambridgeshire, UK
| | | | - Samantha Peel
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge, Cambridgeshire, UK
| |
Collapse
|
27
|
Chang J, Wang R, Yu K, Zhang T, Chen X, Liu Y, Shi R, Wang X, Xia Q, Ma S. Genome-wide CRISPR screening reveals genes essential for cell viability and resistance to abiotic and biotic stresses in Bombyx mori. Genome Res 2020; 30:757-767. [PMID: 32424075 PMCID: PMC7263191 DOI: 10.1101/gr.249045.119] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 04/30/2020] [Indexed: 12/19/2022]
Abstract
High-throughput genetic screens are powerful methods to interrogate gene function on a genome-wide scale and identify genes responsible to certain stresses. Here, we developed a piggyBac strategy to deliver pooled sgRNA libraries stably into cell lines. We used this strategy to conduct a screen based on genome-wide clustered regularly interspaced short palindromic repeat technology (CRISPR)-Cas9 in Bombyx mori cells. We first constructed a single guide RNA (sgRNA) library containing 94,000 sgRNAs, which targeted 16,571 protein-coding genes. We then generated knockout collections in BmE cells using the piggyBac transposon. We identified 1006 genes that are essential for cell viability under normal growth conditions. Of the identified genes, 82.4% (829 genes) were homologous to essential genes in seven animal species. We also identified 838 genes whose loss facilitated cell growth. Next, we performed context-specific positive screens for resistance to biotic or nonbiotic stresses using temperature and baculovirus separately, which identified several key genes and pathways from each screen. Collectively, our results provide a novel and versatile platform for functional annotations of B. mori genomes and deciphering key genes responsible for various conditions. This study also shows the effectiveness, practicality, and convenience of genome-wide CRISPR screens in nonmodel organisms.
Collapse
Affiliation(s)
- Jiasong Chang
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Ruolin Wang
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Kai Yu
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Tong Zhang
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Xiaoxu Chen
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Yue Liu
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Run Shi
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Xiaogang Wang
- Biological Science Research Center, Southwest University, Chongqing 400716, China
| | - Qingyou Xia
- Biological Science Research Center, Southwest University, Chongqing 400716, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400716, China
| | - Sanyuan Ma
- Biological Science Research Center, Southwest University, Chongqing 400716, China
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400716, China
- Chongqing Key Laboratory of Sericulture, Southwest University, Chongqing 400716, China
| |
Collapse
|
28
|
Bodapati S, Daley TP, Lin X, Zou J, Qi LS. A benchmark of algorithms for the analysis of pooled CRISPR screens. Genome Biol 2020; 21:62. [PMID: 32151271 PMCID: PMC7063732 DOI: 10.1186/s13059-020-01972-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Genome-wide pooled CRISPR-Cas-mediated knockout, activation, and repression screens are powerful tools for functional genomic investigations. Despite their increasing importance, there is currently little guidance on how to design and analyze CRISPR-pooled screens. Here, we provide a review of the commonly used algorithms in the computational analysis of pooled CRISPR screens. We develop a comprehensive simulation framework to benchmark and compare the performance of these algorithms using both synthetic and real datasets. Our findings inform parameter choices of CRISPR screens and provide guidance to researchers on the design and analysis of pooled CRISPR screens.
Collapse
Affiliation(s)
- Sunil Bodapati
- Department of Bioengineering, Stanford University, 450 Serra Mall, Stanford, 94305, USA
| | - Timothy P Daley
- Department of Bioengineering, Stanford University, 450 Serra Mall, Stanford, 94305, USA.,Department of Statistics, Stanford University, 450 Serra Mall, Stanford, 94305, USA.,Present Address: Affirm Inc., San Francisco, USA
| | - Xueqiu Lin
- Department of Bioengineering, Stanford University, 450 Serra Mall, Stanford, 94305, USA
| | - James Zou
- Department of Biomedical Data Science, Stanford University, 450 Serra Mall, Stanford, 94305, USA
| | - Lei S Qi
- Department of Bioengineering, Stanford University, 450 Serra Mall, Stanford, 94305, USA. .,Department of Chemical and Systems Biology, Stanford University, 450 Serra Mall, Stanford, 94305, USA. .,ChEM-H Institute, Stanford University, 450 Serra Mall, Stanford, 94305, USA.
| |
Collapse
|
29
|
Bramhachari PV. Advanced Immunotechnological Methods for Detection and Diagnosis of Viral Infections: Current Applications and Future Challenges. DYNAMICS OF IMMUNE ACTIVATION IN VIRAL DISEASES 2020. [PMCID: PMC7121190 DOI: 10.1007/978-981-15-1045-8_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Diagnosis and identification of viruses is an important component of diagnostic virology laboratory. Although various modes of diagnostic methods are now available at disposal, a vast majority of the diseases across the globe remain undiagnosed. This is largely due to the overlapping undifferentiated set of symptoms across myriad set of RNA and DNA viral diseases. As such, it becomes critical to take into consideration several factors for viral diagnosis ranging from the type and quality of specimen collected, time of specimen collection, mode of transport, accuracy, specificity, sensitivity, and the type of diagnostic method used. This chapter broadly emphasizes various methods on diagnostic virology ranging from the classical methods of diagnosis to the most recently developed molecular methods of detection of virus.
Collapse
|
30
|
Johnson AG, Lapointe CP, Wang J, Corsepius NC, Choi J, Fuchs G, Puglisi JD. RACK1 on and off the ribosome. RNA (NEW YORK, N.Y.) 2019; 25:881-895. [PMID: 31023766 PMCID: PMC6573788 DOI: 10.1261/rna.071217.119] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 04/21/2019] [Indexed: 05/17/2023]
Abstract
Receptor for activated C kinase 1 (RACK1) is a eukaryote-specific ribosomal protein (RP) implicated in diverse biological functions. To engineer ribosomes for specific fluorescent labeling, we selected RACK1 as a target given its location on the small ribosomal subunit and other properties. However, prior results suggested that RACK1 has roles both on and off the ribosome, and such an exchange might be related to its various cellular functions and hinder our ability to use RACK1 as a stable fluorescent tag for the ribosome. In addition, the kinetics of spontaneous exchange of RACK1 or any RP from a mature ribosome in vitro remain unclear. To address these issues, we engineered fluorescently labeled human ribosomes via RACK1, and applied bulk and single-molecule biochemical analyses to track RACK1 on and off the human ribosome. Our results demonstrate that, despite its cellular nonessentiality from yeast to humans, RACK1 readily reassociates with the ribosome, displays limited conformational dynamics, and remains stably bound to the ribosome for hours in vitro. This work sheds insight into the biochemical basis of RPs exchange on and off a mature ribosome and provides tools for single-molecule analysis of human translation.
Collapse
Affiliation(s)
- Alex G Johnson
- Department of Structural Biology, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Christopher P Lapointe
- Department of Structural Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Jinfan Wang
- Department of Structural Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Nicholas C Corsepius
- Department of Structural Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Junhong Choi
- Department of Structural Biology, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
| | - Gabriele Fuchs
- The RNA Institute, Department of Biological Sciences, University of Albany, Albany, New York 12222, USA
| | - Joseph D Puglisi
- Department of Structural Biology, Stanford University School of Medicine, Stanford, California 94305, USA
| |
Collapse
|
31
|
Arita M. Essential domains of phosphatidylinositol-4 kinase III β required for enterovirus replication. Microbiol Immunol 2019; 63:285-288. [PMID: 31166044 DOI: 10.1111/1348-0421.12718] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/30/2019] [Accepted: 06/02/2019] [Indexed: 12/23/2022]
Abstract
Phosphatidylinositol-4 kinase III β (PI4KB) is a host factor that is required for enterovirus (EV) replication. In this study, the importance of host proteins that interact with PI4KB in EV replication was analyzed by trans complementation with PI4KB mutants in a PI4KB-knockout cell line. Ectopically expressed PI4KB mutants, which lack binding regions for ACBD3, RAB11, and 14-3-3 proteins, rescued replication of poliovirus and enterovirus 71. These findings suggest that interaction of PI4KB with these host proteins is not essential for EV replication once PI4KB has been expressed and that PI4KB is functionally independent from these host proteins regarding EV replication.
Collapse
Affiliation(s)
- Minetaro Arita
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| |
Collapse
|
32
|
Taemaitree L, Shivalingam A, El-Sagheer AH, Brown T. An artificial triazole backbone linkage provides a split-and-click strategy to bioactive chemically modified CRISPR sgRNA. Nat Commun 2019; 10:1610. [PMID: 30962447 PMCID: PMC6453947 DOI: 10.1038/s41467-019-09600-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 03/18/2019] [Indexed: 12/26/2022] Open
Abstract
As the applications of CRISPR-Cas9 technology diversify and spread beyond the laboratory to diagnostic and therapeutic use, the demands of gRNA synthesis have increased and access to tailored gRNAs is now restrictive. Enzymatic routes are time-consuming, difficult to scale-up and suffer from polymerase-bias while existing chemical routes are inefficient. Here, we describe a split-and-click convergent chemical route to individual or pools of sgRNAs. The synthetic burden is reduced by splitting the sgRNA into a variable DNA/genome-targeting 20-mer, produced on-demand and in high purity, and a fixed Cas9-binding chemically-modified 79-mer, produced cost-effectively on large-scale, a strategy that provides access to site-specific modifications that enhance sgRNA activity and in vivo stability. Click ligation of the two components generates an artificial triazole linkage that is tolerated in functionally critical regions of the sgRNA and allows efficient DNA cleavage in vitro as well as gene-editing in cells with no unexpected off-target effects.
Collapse
Affiliation(s)
- Lapatrada Taemaitree
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Arun Shivalingam
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Afaf H El-Sagheer
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK
- Chemistry Branch, Department of Science and Mathematics, Faculty of Petroleum and Mining Engineering, Suez University, Suez, 43721, Egypt
| | - Tom Brown
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| |
Collapse
|
33
|
ACBD3 Is an Essential Pan-enterovirus Host Factor That Mediates the Interaction between Viral 3A Protein and Cellular Protein PI4KB. mBio 2019; 10:mBio.02742-18. [PMID: 30755512 PMCID: PMC6372799 DOI: 10.1128/mbio.02742-18] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The enterovirus genus of the picornavirus family includes a large number of important human pathogens such as poliovirus, coxsackievirus, enterovirus A71, and rhinoviruses. Like all other positive-strand RNA viruses, genome replication of enteroviruses occurs on rearranged membranous structures called replication organelles (ROs). Phosphatidylinositol 4-kinase IIIβ (PI4KB) is required by all enteroviruses for RO formation. The enteroviral 3A protein recruits PI4KB to ROs, but the exact mechanism remains elusive. Here, we investigated the role of acyl-coenzyme A binding domain containing 3 (ACBD3) in PI4KB recruitment upon enterovirus replication using ACBD3 knockout (ACBD3KO) cells. ACBD3 knockout impaired replication of representative viruses from four enterovirus species and two rhinovirus species. PI4KB recruitment was not observed in the absence of ACBD3. The lack of ACBD3 also affected the localization of individually expressed 3A, causing 3A to localize to the endoplasmic reticulum instead of the Golgi. Reconstitution of wild-type (wt) ACBD3 restored PI4KB recruitment and 3A localization, while an ACBD3 mutant that cannot bind to PI4KB restored 3A localization, but not virus replication. Consistently, reconstitution of a PI4KB mutant that cannot bind ACBD3 failed to restore virus replication in PI4KBKO cells. Finally, by reconstituting ACBD3 mutants lacking specific domains in ACBD3KO cells, we show that acyl-coenzyme A binding (ACB) and charged-amino-acid region (CAR) domains are dispensable for 3A-mediated PI4KB recruitment and efficient enterovirus replication. Altogether, our data provide new insight into the central role of ACBD3 in recruiting PI4KB by enterovirus 3A and reveal the minimal domains of ACBD3 involved in recruiting PI4KB and supporting enterovirus replication.IMPORTANCE Similar to all other positive-strand RNA viruses, enteroviruses reorganize host cellular membranes for efficient genome replication. A host lipid kinase, PI4KB, plays an important role in this membrane rearrangement. The exact mechanism of how enteroviruses recruit PI4KB was unclear. Here, we revealed a role of a Golgi-residing protein, ACBD3, as a mediator of PI4KB recruitment upon enterovirus replication. ACBD3 is responsible for proper localization of enteroviral 3A proteins in host cells, which is important for 3A to recruit PI4KB. By testing ACBD3 and PI4KB mutants that abrogate the ACBD3-PI4KB interaction, we showed that this interaction is crucial for enterovirus replication. The importance of specific domains of ACBD3 was evaluated for the first time, and the domains that are essential for enterovirus replication were identified. Our findings open up a possibility for targeting ACBD3 or its interaction with enteroviruses as a novel strategy for the development of broad-spectrum antienteroviral drugs.
Collapse
|
34
|
Abstract
CRISPR technology has opened a new era of genome interrogation and genome engineering. Discovered in bacteria, where it protects against bacteriophage by cleaving foreign nucleic acid sequences, the CRISPR system has been repurposed as an adaptable tool for genome editing and multiple other applications. CRISPR's ease of use, precision, and versatility have led to its widespread adoption, accelerating biomedical research and discovery in human cells and model organisms. Here we review CRISPR-based tools and discuss how they are being applied to decode the genetic circuits that control immune function in health and disease. Genetic variation in immune cells can affect autoimmune disease risk, infectious disease pathogenesis, and cancer immunotherapies. CRISPR provides unprecedented opportunities for functional mechanistic studies of coding and noncoding genome sequence function in immunity. Finally, we discuss the potential of CRISPR technology to engineer synthetic cellular immunotherapies for a wide range of human diseases.
Collapse
Affiliation(s)
- Dimitre R Simeonov
- Biomedical Sciences Graduate Program, University of California, San Francisco, California 94143, USA.,Department of Microbiology and Immunology, University of California, San Francisco, California 94143, USA; .,Diabetes Center, University of California, San Francisco, California 94143, USA
| | - Alexander Marson
- Department of Microbiology and Immunology, University of California, San Francisco, California 94143, USA; .,Diabetes Center, University of California, San Francisco, California 94143, USA.,Innovative Genomics Institute, University of California, Berkeley, California 94720, USA.,Department of Medicine, University of California, San Francisco, California 94143, USA.,Chan Zuckerberg Biohub, San Francisco, California 94158, USA.,UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, California 94158, USA
| |
Collapse
|
35
|
MSH2 Expression and Resistance to Cisplatin in Muscle-invasive Bladder Cancer: A Mix of Progress and Challenges. Eur Urol 2018; 75:251-252. [PMID: 30470617 DOI: 10.1016/j.eururo.2018.11.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Accepted: 11/06/2018] [Indexed: 12/24/2022]
|