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Arab M, Chen T, Lowe M. Mechanisms governing vesicle traffic at the Golgi apparatus. Curr Opin Cell Biol 2024; 88:102365. [PMID: 38705050 DOI: 10.1016/j.ceb.2024.102365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 04/04/2024] [Accepted: 04/11/2024] [Indexed: 05/07/2024]
Abstract
Vesicle transport at the Golgi apparatus is a well-described process, and the major protein components involved have been identified. This includes the coat proteins that function in cargo sorting and vesicle formation, and the proteins that mediate the downstream events of vesicle tethering and membrane fusion. However, despite this knowledge, there remain significant gaps in our mechanistic understanding of these processes which includes how they are coordinated in space and time. In this review we discuss recent advances that have provided new insights into the mechanisms of Golgi trafficking, focussing on vesicle formation and cargo sorting, and vesicle tethering and fusion. These studies point to a high degree of spatial organisation of trafficking components at the Golgi and indicate an inherent plasticity of trafficking. Going forward, further advancements in technology and more sophisticated functional assays are expected to yield greater understanding of the mechanisms that govern Golgi trafficking events.
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Affiliation(s)
- Maryam Arab
- Faculty of Biology, Medicine and Health, University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK
| | - Tong Chen
- Faculty of Biology, Medicine and Health, University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK
| | - Martin Lowe
- Faculty of Biology, Medicine and Health, University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK.
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2
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Di Marco T, Mazzoni M, Greco A, Cassinelli G. Non-oncogene dependencies: Novel opportunities for cancer therapy. Biochem Pharmacol 2024:116254. [PMID: 38704100 DOI: 10.1016/j.bcp.2024.116254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/22/2024] [Accepted: 04/30/2024] [Indexed: 05/06/2024]
Abstract
Targeting oncogene addictions have changed the history of subsets of malignancies and continues to represent an excellent therapeutic opportunity. Nonetheless, alternative strategies are required to treat malignancies driven by undruggable oncogenes or loss of tumor suppressor genes and to overcome drug resistance also occurring in cancers addicted to actionable drivers. The discovery of non-oncogene addiction (NOA) uncovered novel therapeutically exploitable "Achilles' heels". NOA refers to genes/pathways not oncogenic per sé but essential for the tumor cell growth/survival while dispensable for normal cells. The clinical success of several classes of conventional and molecular targeted agents can be ascribed to their impact on both tumor cell-associated intrinsic as well as microenvironment-related extrinsic NOA. The integration of genetic, computational and pharmacological high-throughput approaches led to the identification of an expanded repertoire of synthetic lethality interactions implicating NOA targets. Only a few of them have been translated into the clinics as most NOA vulnerabilities are not easily druggable or appealing targets. Nonetheless, their identification has provided in-depth knowledge of tumor pathobiology and suggested novel therapeutic opportunities. Here, we summarize conceptual framework of intrinsic and extrinsic NOA providing exploitable vulnerabilities. Conventional and emerging methodological approaches used to disclose NOA dependencies are reported together with their limits. We illustrate NOA paradigmatic and peculiar examples and outline the functional/mechanistic aspects, potential druggability and translational interest. Finally, we comment on difficulties in exploiting the NOA-generated knowledge to develop novel therapeutic approaches to be translated into the clinics and to fully harness the potential of clinically available drugs.
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Affiliation(s)
- Tiziana Di Marco
- Integrated Biology of Rare Tumors Unit, Experimental Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milan, Italy
| | - Mara Mazzoni
- Integrated Biology of Rare Tumors Unit, Experimental Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milan, Italy
| | - Angela Greco
- Integrated Biology of Rare Tumors Unit, Experimental Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milan, Italy
| | - Giuliana Cassinelli
- Molecular Pharmacology Unit, Experimental Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milan, Italy.
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3
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Byford O, Shaw AB, Tse HN, Todd EJAA, Álvarez-Rodríguez B, Hewson R, Fontana J, Barr JN. Lymphocytic choriomeningitis arenavirus requires cellular COPI and AP-4 complexes for efficient virion production. J Virol 2024; 98:e0200623. [PMID: 38334330 PMCID: PMC10949467 DOI: 10.1128/jvi.02006-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 01/16/2024] [Indexed: 02/10/2024] Open
Abstract
Lymphocytic choriomeningitis virus (LCMV) is a bisegmented negative-sense RNA virus classified within the Arenaviridae family of the Bunyavirales order. LCMV is associated with fatal disease in immunocompromized populations, and as the prototypical arenavirus, acts as a model for the many serious human pathogens within this group. Here, we examined the dependence of LCMV multiplication on cellular trafficking components using a recombinant LCMV expressing enhanced green fluorescent protein in conjunction with a curated siRNA library. The screen revealed a requirement for subunits of both the coat protein 1 (COPI) coatomer and adapter protein 4 (AP-4) complexes. By rescuing a recombinant LCMV harboring a FLAG-tagged glycoprotein (GP-1) envelope spike (rLCMV-GP1-FLAG), we showed infection resulted in marked co-localization of individual COPI and AP-4 components with both LCMV nucleoprotein (NP) and GP-1, consistent with their involvement in viral processes. To further investigate the role of both COPI and AP-4 complexes during LCMV infection, we utilized the ARF-I inhibitor brefeldin A (BFA) that prevents complex formation. Within a single 12-h cycle of virus multiplication, BFA pre-treatment caused no significant change in LCMV-specific RNA synthesis, alongside no significant change in LCMV NP expression, as measured by BFA time-of-addition experiments. In contrast, BFA addition resulted in a significant drop in released virus titers, approaching 50-fold over the same 12-h period, rising to over 600-fold over 24 h. Taken together, these findings suggest COPI and AP-4 complexes are important host cell factors required for the formation and release of infectious LCMV. IMPORTANCE Arenaviruses are rodent-borne, segmented, negative-sense RNA viruses, with several members responsible for fatal human disease, with the prototypic member lymphocytic choriomeningitis virus (LCMV) being under-recognised as a pathogen capable of inflicting neurological infections with fatal outcome. A detailed understanding of how arenaviruses subvert host cell processes to complete their multiplication cycle is incomplete. Here, using a combination of gene ablation and pharmacological inhibition techniques, we showed that host cellular COPI and AP-4 complexes, with native roles in cellular vesicular transport, were required for efficient LCMV growth. We further showed these complexes acted on late stages of the multiplication cycle, post-gene expression, with a significant impact on infectious virus egress. Collectively, our findings improve the understanding of arenaviruses host-pathogen interactions and reveal critical cellular trafficking pathways required during infection.
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Affiliation(s)
- Owen Byford
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Amelia B. Shaw
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Hiu Nam Tse
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Eleanor J. A. A. Todd
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Beatriz Álvarez-Rodríguez
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Roger Hewson
- Virology and Pathogenesis Group, National Infection Service, Public Health England, Porton Down, United Kingdom
| | - Juan Fontana
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - John N. Barr
- School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
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4
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Feng Z, Liu S, Su M, Song C, Lin C, Zhao F, Li Y, Zeng X, Zhu Y, Hou Y, Ren C, Zhang H, Yi P, Ji Y, Wang C, Li H, Ma M, Luo L, Li L. TANGO6 regulates cell proliferation via COPI vesicle-mediated RPB2 nuclear entry. Nat Commun 2024; 15:2371. [PMID: 38490996 PMCID: PMC10943085 DOI: 10.1038/s41467-024-46720-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 03/01/2024] [Indexed: 03/18/2024] Open
Abstract
Coat protein complex I (COPI) vesicles mediate the retrograde transfer of cargo between Golgi cisternae and from the Golgi to the endoplasmic reticulum (ER). However, their roles in the cell cycle and proliferation are unclear. This study shows that TANGO6 associates with COPI vesicles via two transmembrane domains. The TANGO6 N- and C-terminal cytoplasmic fragments capture RNA polymerase II subunit B (RPB) 2 in the cis-Golgi during the G1 phase. COPI-docked TANGO6 carries RPB2 to the ER and then to the nucleus. Functional disruption of TANGO6 hinders the nuclear entry of RPB2, which accumulates in the cytoplasm, causing cell cycle arrest in the G1 phase. The conditional depletion or overexpression of TANGO6 in mouse hematopoietic stem cells results in compromised or expanded hematopoiesis. Our study results demonstrate that COPI vesicle-associated TANGO6 plays a role in the regulation of cell cycle progression by directing the nuclear transfer of RPB2, making it a potential target for promoting or arresting cell expansion.
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Affiliation(s)
- Zhi Feng
- Research center of Stem cells and Ageing, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, PR China
| | - Shengnan Liu
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, PR China
| | - Ming Su
- Research center of Stem cells and Ageing, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, PR China
| | - Chunyu Song
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, PR China
| | - Chenyu Lin
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, PR China
| | - Fangying Zhao
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, PR China
| | - Yang Li
- Research center of Stem cells and Ageing, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, PR China
| | - Xianyan Zeng
- Institute of Life Sciences, Laboratory of Developmental Biology, Department of Cell Biology and Genetics, Chongqing Medical University, Chongqing, 400016, PR China
| | - Yong Zhu
- Institute of Life Sciences, Laboratory of Developmental Biology, Department of Cell Biology and Genetics, Chongqing Medical University, Chongqing, 400016, PR China
| | - Yu Hou
- Institute of Life Sciences, Laboratory of Developmental Biology, Department of Cell Biology and Genetics, Chongqing Medical University, Chongqing, 400016, PR China
| | - Chunguang Ren
- Institute of Life Sciences, Laboratory of Developmental Biology, Department of Cell Biology and Genetics, Chongqing Medical University, Chongqing, 400016, PR China
| | - Huan Zhang
- Institute of Life Sciences, Laboratory of Developmental Biology, Department of Cell Biology and Genetics, Chongqing Medical University, Chongqing, 400016, PR China
| | - Ping Yi
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, 401120, PR China
| | - Yong Ji
- Key Laboratory of Cardiovascular and Cerebrovascular Medicine; Key Laboratory of Targeted Intervention of Cardiovascular Disease; Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, 211166, PR China
- National Key Laboratory of Frigid Zone Cardiovascular Diseases (NKLFZCD), Harbin Medical University, Harbin, 150076, Heilongjiang, PR China
| | - Chao Wang
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, 230027, PR China
| | - Hongtao Li
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, PR China
| | - Ming Ma
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, PR China
| | - Lingfei Luo
- Institute of Developmental Biology and Regenerative Medicine, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Southwest University, Chongqing, 400715, PR China.
| | - Li Li
- Research center of Stem cells and Ageing, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, PR China.
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5
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Xia Y, Pei T, Zhao J, Wang Z, Shen Y, Yang Y, Liang J. Long noncoding RNA H19: functions and mechanisms in regulating programmed cell death in cancer. Cell Death Discov 2024; 10:76. [PMID: 38355574 PMCID: PMC10866971 DOI: 10.1038/s41420-024-01832-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/16/2024] [Accepted: 01/25/2024] [Indexed: 02/16/2024] Open
Abstract
Long noncoding RNAs (lncRNAs) are a group of noncoding RNAs with transcript lengths of >200 nucleotides. Mounting evidence suggests that lncRNAs are closely associated with tumorigenesis. LncRNA H19 (H19) was the first lncRNA to function as an oncogene in many malignant tumors. Apart from the established role of H19 in promoting cell growth, proliferation, invasion, migration, epithelial-mesenchymal transition (EMT), and metastasis, it has been recently discovered that H19 also inhibits programmed cell death (PCD) of cancer cells. In this review, we summarize the mechanisms by which H19 regulates PCD in cancer cells through various signaling pathways, molecular mechanisms, and epigenetic modifications. H19 regulates PCD through the Wnt/β-catenin pathway and the PI3K-Akt-mTOR pathway. It also acts as a competitive endogenous RNA (ceRNA) in PCD regulation. The interaction between H19 and RNA-binding proteins (RBP) regulates apoptosis in cancer. Moreover, epigenetic modifications, including DNA and RNA methylation and histone modifications, are also involved in H19-associated PCD regulation. In conclusion, we summarize the role of H19 signaling via PCD in cancer chemoresistance, highlighting the promising research significance of H19 as a therapeutic target. We hope that our study will contribute to a broader understanding of H19 in cancer development and treatment.
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Affiliation(s)
- Yuyang Xia
- Department of Urology, Institute of Urology, West China Hospital, West China School of Medicine, Sichuan University, 610041, Chengdu, China
| | - Tianjiao Pei
- Department of Reproductive Medicine, West China Second University Hospital of Sichuan University, Chengdu, China.
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital of Sichuan University, Chengdu, China.
| | - Junjie Zhao
- Department of Urology, Institute of Urology, West China Hospital, West China School of Medicine, Sichuan University, 610041, Chengdu, China
| | - Zilin Wang
- Department of Urology, Institute of Urology, West China Hospital, West China School of Medicine, Sichuan University, 610041, Chengdu, China
| | - Yu Shen
- Department of Urology, Institute of Urology, West China Hospital, West China School of Medicine, Sichuan University, 610041, Chengdu, China
| | - Yang Yang
- Department of Urology, Institute of Urology, West China Hospital, West China School of Medicine, Sichuan University, 610041, Chengdu, China
| | - Jiayu Liang
- Department of Urology, Institute of Urology, West China Hospital, West China School of Medicine, Sichuan University, 610041, Chengdu, China.
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6
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Liu X, Wang X, Xu T, Liu X, Li L. Effects of Different Delivery Modes on the Expression of Vesicle Transport-Related Genes in Female Pelvic Floor Muscle Repair After Injury. Appl Biochem Biotechnol 2024; 196:667-678. [PMID: 37171760 DOI: 10.1007/s12010-023-04510-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2023] [Indexed: 05/13/2023]
Abstract
A sudden rise in intra-abdominal pressure that causes the pressure in the bladder to rise during physical movement and/or activity, such as coughing, sneezing, laughing, running, or weightlifting, is known as stress urinary incontinence. This condition causes an uncontrollable overflow of urine. The study's goal was to determine whether effector molecules, specifically ADP ribosylation factor GTPase activated protein 3, might play a part in the female pelvic floor muscle's ability to heal after suffering damage during vaginal delivery. Pelvic floor muscle samples were taken from women who had at least one vaginal delivery and were enrolled in either the IU group (n = 45; issue of stress urinary incontinence) or the NL group (n = 85; no issue of stress urinary incontinence) depending on whether they had a problem with stress urinary incontinence. Vesicle transport-related genes in female pelvic floor muscle injury repair were discovered using Gene Expression Omnibus. For gene analysis and screening, RT-qPCR was employed. On the first day following injury, the expression level of ARFGAP3 mRNA increased by 2.8 times (p 0.05) and by 5 times (p 0.01) on the third day. On the first day following damage, STMN1 mRNA expression rose by 0.3 times (p 0.05). On the first day following injury, the expression level of THBS2 mRNA increased by 1.6 times (p 0.01). On the third day following the injury, the expression level of PLXNB2 mRNA increased by 1.2 times (p 0. 01), and on the fifth day following the injury, it increased by 2.5 times (p 0. 01). After pelvic floor muscle damage, the mRNA expression levels of the CSF1R, ANXA4, and EMR1 genes dropped. Between those with and without pelvic floor muscle damage, there was no statistically significant difference in the expression levels of LGARLS3, KDELR3, and KIF20A mRNA (p > 0. 05 for all). The differential expression of genes after pelvic floor muscle injury can identify the target in the process of pelvic floor muscle injury repair and regeneration.
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Affiliation(s)
- Xin Liu
- Obstetrics Department of Hebei Hospital of Traditional Chinese Medicine, Shijiazhuang, 050013, China.
| | - Xiaohui Wang
- Obstetrics Department of Hebei Hospital of Traditional Chinese Medicine, Shijiazhuang, 050013, China
| | - Tingna Xu
- Obstetrics Department of Hebei Hospital of Traditional Chinese Medicine, Shijiazhuang, 050013, China
| | - Xia Liu
- Obstetrics Department of Hebei Hospital of Traditional Chinese Medicine, Shijiazhuang, 050013, China
| | - Lingge Li
- Obstetrics Department of Hebei Hospital of Traditional Chinese Medicine, Shijiazhuang, 050013, China
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7
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Dey D, Qing E, He Y, Chen Y, Jennings B, Cohn W, Singh S, Gakhar L, Schnicker NJ, Pierce BG, Whitelegge JP, Doray B, Orban J, Gallagher T, Hasan SS. A single C-terminal residue controls SARS-CoV-2 spike trafficking and incorporation into VLPs. Nat Commun 2023; 14:8358. [PMID: 38102143 PMCID: PMC10724246 DOI: 10.1038/s41467-023-44076-3] [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: 01/30/2023] [Accepted: 11/29/2023] [Indexed: 12/17/2023] Open
Abstract
The spike (S) protein of SARS-CoV-2 is delivered to the virion assembly site in the ER-Golgi Intermediate Compartment (ERGIC) from both the ER and cis-Golgi in infected cells. However, the relevance and modulatory mechanism of this bidirectional trafficking are unclear. Here, using structure-function analyses, we show that S incorporation into virus-like particles (VLP) and VLP fusogenicity are determined by coatomer-dependent S delivery from the cis-Golgi and restricted by S-coatomer dissociation. Although S mimicry of the host coatomer-binding dibasic motif ensures retrograde trafficking to the ERGIC, avoidance of the host-like C-terminal acidic residue is critical for S-coatomer dissociation and therefore incorporation into virions or export for cell-cell fusion. Because this C-terminal residue is the key determinant of SARS-CoV-2 assembly and fusogenicity, our work provides a framework for the export of S protein encoded in genetic vaccines for surface display and immune activation.
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Affiliation(s)
- Debajit Dey
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Enya Qing
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, IL, 60153, USA
| | - Yanan He
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD, 20850, USA
| | - Yihong Chen
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD, 20850, USA
| | - Benjamin Jennings
- Department of Internal Medicine, Hematology Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Whitaker Cohn
- Pasarow Mass Spectrometry Laboratory, The Jane and Terry Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Suruchi Singh
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Lokesh Gakhar
- Department of Biochemistry and Molecular Biology, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
- Protein and Crystallography Facility, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
- PAQ Therapeutics, Burlington, MA, 01803, USA
| | - Nicholas J Schnicker
- Protein and Crystallography Facility, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
- Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - Brian G Pierce
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD, 20850, USA
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, 20742, USA
| | - Julian P Whitelegge
- Pasarow Mass Spectrometry Laboratory, The Jane and Terry Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Balraj Doray
- Department of Internal Medicine, Hematology Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - John Orban
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD, 20850, USA
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA
| | - Tom Gallagher
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, IL, 60153, USA
| | - S Saif Hasan
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.
- University of Maryland Marlene and Stewart Greenebaum Cancer Center, University of Maryland Medical Center, Baltimore, MD, 21201, USA.
- Center for Biomolecular Therapeutics, University of Maryland School of Medicine, Rockville, MD, 20850, USA.
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8
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Dey D, Hasan SS. Strategies for rapid production of crystallization quality coatomer WD40 domains. Protein Expr Purif 2023; 212:106358. [PMID: 37625737 PMCID: PMC10529451 DOI: 10.1016/j.pep.2023.106358] [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: 04/05/2023] [Revised: 08/19/2023] [Accepted: 08/22/2023] [Indexed: 08/27/2023]
Abstract
The vesicular secretion of soluble cargo proteins from the endoplasmic reticulum (ER) is accompanied by the export of ER-resident membrane proteins that are co-packaged in secretory vesicles. The cytosolic coatomer protein complex I (COPI) utilizes the N-terminal WD40 domains of α-COPI and β'-COPI subunits to bind these membrane protein "clients" for ER retrieval. These "αWD40" and "β'WD40" domains are structural homologs that demonstrate distinct selectivity for client proteins. However, elucidation of the atomic-level principles of coatomer-client interactions has been challenging due to the tendency of αWD40 domain to undergo aggregation during expression and purification. Here we describe a rapid recombinant production strategy from E. coli, which substantially enhances the quality of the purified αWD40 domain. The αWD40 purification and crystallization are completed within one day, which minimizes aggregation losses and yields a 1.9 Å resolution crystal structure. We demonstrate the versatility of this strategy by applying it to purify the β'WD40 domain, which yields crystal structures in the 1.2-1.3 Å resolution range. As an alternate recombinant production system, we develop a cost-effective strategy for αWD40 production in human Expi293 cells. Finally, we suggest a roadmap to simplify these protocols further, which is of significance for the production of WD40 mutants prone to rapid aggregation. The WD40 production strategies presented here are likely to have broad applications because the WD40 domain represents one of the largest families of biomolecular interaction modules in the eukaryotic proteome and is critical for trafficking of host as well as viral proteins such as the SARS-CoV-2 spike protein.
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Affiliation(s)
- Debajit Dey
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - S Saif Hasan
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA; University of Maryland Marlene and Stewart Greenebaum Cancer Center, University of Maryland Medical Center, Baltimore, MD, 21201, USA; Center for Biomolecular Therapeutics, University of Maryland School of Medicine, Rockville, MD, 20850, USA.
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9
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Victorelli S, Passos JF. COPIng with senescence. Nat Cell Biol 2023; 25:1724-1725. [PMID: 38012404 DOI: 10.1038/s41556-023-01276-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Affiliation(s)
- Stella Victorelli
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA
| | - João F Passos
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA.
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA.
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10
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Custer SK, Gilson T, Astroski JW, Nanguneri SR, Iurillo AM, Androphy EJ. COPI coatomer subunit α-COP interacts with the RNA binding protein Nucleolin via a C-terminal dilysine motif. Hum Mol Genet 2023; 32:3263-3275. [PMID: 37658769 PMCID: PMC10656708 DOI: 10.1093/hmg/ddad140] [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: 04/17/2023] [Revised: 08/07/2023] [Accepted: 08/30/2023] [Indexed: 09/05/2023] Open
Abstract
The COPI coatomer subunit α-COP has been shown to co-precipitate mRNA in multiple settings, but it was unclear whether the interaction with mRNA was direct or mediated by interaction with an adapter protein. The COPI complex often interacts with proteins via C-terminal dilysine domains. A search for candidate RNA binding proteins with C-terminal dilysine motifs yielded Nucleolin, which terminates in a KKxKxx sequence. This protein was an especially intriguing candidate as it has been identified as an interacting partner for Survival Motor Neuron protein (SMN). Loss of SMN causes the neurodegenerative disease Spinal Muscular Atrophy. We have previously shown that SMN and α-COP interact and co-migrate in axons, and that overexpression of α-COP reduced phenotypic severity in cell culture and animal models of SMA. We show here that in an mRNA independent manner, endogenous Nucleolin co-precipitates endogenous α-COP and ε-COP but not β-COP which may reflect an interaction with the so-called B-subcomplex rather a complete COPI heptamer. The ability of Nucleolin to bind to α-COP requires the presence of the C-terminal KKxKxx domain of Nucleolin. Furthermore, we have generated a point mutant in the WD40 domain of α-COP which eliminates its ability to co-precipitate Nucleolin but does not interfere with precipitation of partners mediated by non-KKxKxx motifs such as the kainate receptor subunit 2. We propose that via interaction between the C-terminal dilysine motif of Nucleolin and the WD40 domain of α-COP, Nucleolin acts an adaptor to allow α-COP to interact with a population of mRNA.
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Affiliation(s)
- Sara K Custer
- Dermatology, Indiana University School of Medicine, 545 Barnhill Drive, Emerson Hall 139, Indianapolis, IN 46202, United States
| | - Timra Gilson
- Dermatology, Indiana University School of Medicine, 545 Barnhill Drive, Emerson Hall 139, Indianapolis, IN 46202, United States
| | - Jacob W Astroski
- Dermatology, Indiana University School of Medicine, 545 Barnhill Drive, Emerson Hall 139, Indianapolis, IN 46202, United States
| | - Siddarth R Nanguneri
- Dermatology, Indiana University School of Medicine, 545 Barnhill Drive, Emerson Hall 139, Indianapolis, IN 46202, United States
| | - Alyssa M Iurillo
- Indiana University School of Medicine, 340 West 10 St, Indianapolis, IN 46202, United States
| | - Elliot J Androphy
- Dermatology, Indiana University School of Medicine, 545 Barnhill Drive, Emerson Hall 139, Indianapolis, IN 46202, United States
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11
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Zhu X, Yin J, Guo H, Wang Y, Ma B. Vesicle trafficking in rice: too little is known. FRONTIERS IN PLANT SCIENCE 2023; 14:1263966. [PMID: 37790794 PMCID: PMC10543891 DOI: 10.3389/fpls.2023.1263966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 08/28/2023] [Indexed: 10/05/2023]
Abstract
The vesicle trafficking apparatus is a fundamental machinery to maintain the homeostasis of membrane-enclosed organelles in eukaryotic cells. Thus, it is broadly conserved in eukaryotes including plants. Intensive studies in the model organisms have produced a comprehensive picture of vesicle trafficking in yeast and human. However, with respect to the vesicle trafficking of plants including rice, our understanding of the components and their coordinated regulation is very limited. At present, several vesicle trafficking apparatus components and cargo proteins have been identified and characterized in rice, but there still remain large unknowns concerning the organization and function of the rice vesicle trafficking system. In this review, we outline the main vesicle trafficking pathways of rice based on knowledge obtained in model organisms, and summarize current advances of rice vesicle trafficking. We also propose to develop methodologies applicable to rice and even other crops for further exploring the mysteries of vesicle trafficking in plants.
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Affiliation(s)
- Xiaobo Zhu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University at Wenjiang, Chengdu, Sichuan, China
| | - Junjie Yin
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University at Wenjiang, Chengdu, Sichuan, China
| | - Hongming Guo
- Environment-friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province, Sichuan Academy of Agricultural Sciences, Chengdu, China
| | - Yuping Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University at Wenjiang, Chengdu, Sichuan, China
| | - Bingtian Ma
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University at Wenjiang, Chengdu, Sichuan, China
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12
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Yang Y, Chen H, Zhang C, Shin HJ, Qian Y, Jung YS. HDAC-Specific Inhibitors Induce the Release of Porcine Epidemic Diarrhea Virus via the COPII-Coated Vesicles. Viruses 2023; 15:1874. [PMID: 37766280 PMCID: PMC10534748 DOI: 10.3390/v15091874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/31/2023] [Accepted: 09/01/2023] [Indexed: 09/29/2023] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) is an alpha-coronavirus causing acute diarrhea and high mortality in neonatal suckling piglets, resulting in huge economic losses for the global swine industry. The replication, assembly and cell egression of PEDV, an enveloped RNA virus, are mediated via altered intracellular trafficking. The underlying mechanisms of PEDV secretion are poorly understood. In this study, we found that the histone deacetylase (HDAC)-specific inhibitors, trichostatin A (TSA) and sodium butyrate (NaB), facilitate the secretion of infectious PEDV particles without interfering with its assembly. We found that PEDV N protein and its replicative intermediate dsRNA colocalize with coat protein complex II (COPII)-coated vesicles. We also showed that the colocalization of PEDV and COPII is enhanced by the HDAC-specific inhibitors. In addition, ultrastructural analysis revealed that the HDAC-specific inhibitors promote COPII-coated vesicles carrying PEDV virions and the secretion of COPII-coated vesicles. Consistently, HDAC-specific inhibitors-induced PEDV particle secretion was abolished by Sec24B knockdown, implying that the HDAC-specific inhibitors-mediated COPII-coated vesicles are required for PEDV secretion. Taken together, our findings provide initial evidence suggesting that PEDV virions can assemble in the endoplasmic reticulum (ER) and bud off from the ER in the COPII-coated vesicles. HDAC-specific inhibitors promote PEDV release by hijacking the COPII-coated vesicles.
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Affiliation(s)
- Ying Yang
- One Health Laboratory, Jiangsu Foreign Expert Workstation, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Huan Chen
- One Health Laboratory, Jiangsu Foreign Expert Workstation, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Caisheng Zhang
- One Health Laboratory, Jiangsu Foreign Expert Workstation, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Hyun-Jin Shin
- College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yingjuan Qian
- One Health Laboratory, Jiangsu Foreign Expert Workstation, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Jiangsu Agri-Animal Husbandry Vocational College, Veterinary Bio-Pharmaceutical, Taizhou 225300, China
| | - Yong-Sam Jung
- One Health Laboratory, Jiangsu Foreign Expert Workstation, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
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13
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Walton K, Nawara TJ, Angermeier AR, Rosengrant H, Lee E, Wynn B, Victorova E, Belov G, Sztul E. Site-specific phosphorylations of the Arf activator GBF1 differentially regulate GBF1 function in Golgi homeostasis and secretion versus cytokinesis. Sci Rep 2023; 13:13609. [PMID: 37604968 PMCID: PMC10442430 DOI: 10.1038/s41598-023-40705-5] [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] [Received: 10/13/2022] [Accepted: 08/16/2023] [Indexed: 08/23/2023] Open
Abstract
Diverse cellular processes, including membrane traffic, lipid homeostasis, cytokinesis, mitochondrial positioning, and cell motility are critically dependent on the Sec7 domain guanine nucleotide exchange factor GBF1. Yet, how the participation of GBF1 in a particular cellular function is regulated is unknown. Here, we show that the phosphorylation of specific highly conserved serine and tyrosine residues within the N-terminal domain of GBF1 differentially regulates its function in maintaining Golgi homeostasis and facilitating secretion versus its role in cytokinesis. Specifically, GBF1 mutants containing single amino acid substitutions that mimic a stably phosphorylated S233, S371, Y377, and Y515 or the S233A mutant that can't be phosphorylated are fully able to maintain Golgi architecture and support cargo traffic through the secretory pathway when assessed in multiple functional assays. However, the same mutants cause multi-nucleation when expressed in cells, and appear to inhibit the progression through mitosis and the resolution of cytokinetic bridges. Thus, GBF1 participates in distinct interactive networks when mediating Golgi homeostasis and secretion versus facilitating cytokinesis, and GBF1 integration into such networks is differentially regulated by the phosphorylation of specific GBF1 residues.
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Affiliation(s)
- Kendall Walton
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA.
| | - Tomasz J Nawara
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA
| | - Allyson R Angermeier
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA
| | - Hadley Rosengrant
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA
| | - Eunjoo Lee
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA
| | - Bridge Wynn
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA
| | - Ekaterina Victorova
- Department of Veterinary Medicine, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - George Belov
- Department of Veterinary Medicine, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, MD, 20742, USA
| | - Elizabeth Sztul
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, MCLM 668, Birmingham, AL, 35233-2008, USA
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14
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Rossi S, Di Salvio M, Balì M, De Simone A, Apolloni S, D’Ambrosi N, Arisi I, Cipressa F, Cozzolino M, Cestra G. C9orf72 Toxic Species Affect ArfGAP-1 Function. Cells 2023; 12:2007. [PMID: 37566088 PMCID: PMC10416972 DOI: 10.3390/cells12152007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/12/2023] Open
Abstract
Compelling evidence indicates that defects in nucleocytoplasmic transport contribute to the pathogenesis of amyotrophic lateral sclerosis (ALS). In particular, hexanucleotide (G4C2) repeat expansions in C9orf72, the most common cause of genetic ALS, have a widespread impact on the transport machinery that regulates the nucleocytoplasmic distribution of proteins and RNAs. We previously reported that the expression of G4C2 hexanucleotide repeats in cultured human and mouse cells caused a marked accumulation of poly(A) mRNAs in the cell nuclei. To further characterize the process, we set out to systematically identify the specific mRNAs that are altered in their nucleocytoplasmic distribution in the presence of C9orf72-ALS RNA repeats. Interestingly, pathway analysis showed that the mRNAs involved in membrane trafficking are particularly enriched among the identified mRNAs. Most importantly, functional studies in cultured cells and Drosophila indicated that C9orf72 toxic species affect the membrane trafficking route regulated by ADP-Ribosylation Factor 1 GTPase Activating Protein (ArfGAP-1), which exerts its GTPase-activating function on the small GTPase ADP-ribosylation factor 1 to dissociate coat proteins from Golgi-derived vesicles. We demonstrate that the function of ArfGAP-1 is specifically affected by expanded C9orf72 RNA repeats, as well as by C9orf72-related dipeptide repeat proteins (C9-DPRs), indicating the retrograde Golgi-to-ER vesicle-mediated transport as a target of C9orf72 toxicity.
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Affiliation(s)
- Simona Rossi
- Institute of Translational Pharmacology (IFT), National Research Council (CNR), 00133 Rome, Italy; (S.R.); (I.A.)
- Fondazione Santa Lucia IRCCS, c/o CERC, 00143 Rome, Italy;
| | - Michela Di Salvio
- Institute of Molecular Biology and Pathology (IBPM), National Research Council (CNR), 00185 Rome, Italy;
| | - Marilisa Balì
- Department of Biology and Biotechnology, University of Rome “La Sapienza”, 00185 Rome, Italy; (M.B.); (A.D.S.)
| | - Assia De Simone
- Department of Biology and Biotechnology, University of Rome “La Sapienza”, 00185 Rome, Italy; (M.B.); (A.D.S.)
| | - Savina Apolloni
- Department of Biology, University of Rome “Tor Vergata”, 00133 Rome, Italy;
| | - Nadia D’Ambrosi
- Fondazione Santa Lucia IRCCS, c/o CERC, 00143 Rome, Italy;
- Department of Biology, University of Rome “Tor Vergata”, 00133 Rome, Italy;
| | - Ivan Arisi
- Institute of Translational Pharmacology (IFT), National Research Council (CNR), 00133 Rome, Italy; (S.R.); (I.A.)
- European Brain Research Institute “Rita Levi-Montalcini”, 00161 Rome, Italy
| | - Francesca Cipressa
- Department of Ecological and Biological Science, University of Tuscia, 01100 Viterbo, Italy;
| | - Mauro Cozzolino
- Institute of Translational Pharmacology (IFT), National Research Council (CNR), 00133 Rome, Italy; (S.R.); (I.A.)
| | - Gianluca Cestra
- Fondazione Santa Lucia IRCCS, c/o CERC, 00143 Rome, Italy;
- Institute of Molecular Biology and Pathology (IBPM), National Research Council (CNR), 00185 Rome, Italy;
- Department of Biology and Biotechnology, University of Rome “La Sapienza”, 00185 Rome, Italy; (M.B.); (A.D.S.)
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15
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Li FL, Guan KL. The Arf family GTPases: Regulation of vesicle biogenesis and beyond. Bioessays 2023; 45:e2200214. [PMID: 36998106 PMCID: PMC10282109 DOI: 10.1002/bies.202200214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 03/16/2023] [Accepted: 03/17/2023] [Indexed: 04/01/2023]
Abstract
The Arf family proteins are best known for their roles in the vesicle biogenesis. However, they also play fundamental roles in a wide range of cellular regulation besides vesicular trafficking, such as modulation of lipid metabolic enzymes, cytoskeleton remodeling, ciliogenesis, lysosomal, and mitochondrial morphology and functions. Growing studies continue to expand the downstream effector landscape of Arf proteins, especially for the less-studied members, revealing new biological functions, such as amino acid sensing. Experiments with cutting-edge technologies and in vivo functional studies in the last decade help to provide a more comprehensive view of Arf family functions. In this review, we summarize the cellular functions that are regulated by at least two different Arf members with an emphasis on those beyond vesicle biogenesis.
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Affiliation(s)
- Fu-Long Li
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Kun-Liang Guan
- Department of Pharmacology and Moores Cancer Center, University of California San Diego, La Jolla, CA, USA
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16
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Gurriaran-Rodriguez U, Datzkiw D, Radusky LG, Esper M, Xiao F, Ming H, Fisher S, Rojas MA, De Repentigny Y, Kothary R, Rojas AL, Serrano L, Hierro A, Rudnicki MA. Wnt binding to Coatomer proteins directs secretion on exosomes independently of palmitoylation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.30.542914. [PMID: 37398399 PMCID: PMC10312507 DOI: 10.1101/2023.05.30.542914] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Wnt proteins are secreted hydrophobic glycoproteins that act over long distances through poorly understood mechanisms. We discovered that Wnt7a is secreted on extracellular vesicles (EVs) following muscle injury. Structural analysis identified the motif responsible for Wnt7a secretion on EVs that we term the Exosome Binding Peptide (EBP). Addition of the EBP to an unrelated protein directed secretion on EVs. Disruption of palmitoylation, knockdown of WLS, or deletion of the N-terminal signal peptide did not affect Wnt7a secretion on purified EVs. Bio-ID analysis identified Coatomer proteins as candidates responsible for loading Wnt7a onto EVs. The crystal structure of EBP bound to the COPB2 coatomer subunit, the binding thermodynamics, and mutagenesis experiments, together demonstrate that a dilysine motif in the EBP mediates binding to COPB2. Other Wnts contain functionally analogous structural motifs. Mutation of the EBP results in a significant impairment in the ability of Wnt7a to stimulate regeneration, indicating that secretion of Wnt7a on exosomes is critical for normal regeneration in vivo . Our studies have defined the structural mechanism that mediates binding of Wnt7a to exosomes and elucidated the singularity of long-range Wnt signalling.
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17
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Hong Y, Xia Z, Sun Y, Lan Y, Di T, Yang J, Sun J, Qiu M, Luo Q, Yang D. A Comprehensive Pan-Cancer Analysis of the Regulation and Prognostic Effect of Coat Complex Subunit Zeta 1. Genes (Basel) 2023; 14:genes14040889. [PMID: 37107648 PMCID: PMC10137353 DOI: 10.3390/genes14040889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/26/2023] [Accepted: 04/08/2023] [Indexed: 04/29/2023] Open
Abstract
The Coatomer protein complex Zeta 1 (COPZ1) has been reported to play an essential role in maintaining the survival of some types of tumors. In this study, we sought to explore the molecular characteristics of COPZ1 and its clinical prognostic value through a pan-cancers bioinformatic analysis. We found that COPZ1 was extremely prevalent in a variety of cancer types, and high expression of COPZ1 was linked to poor overall survival in many cancers, while low expression in LAML and PADC was correlated with tumorigenesis. Besides, the CRISPR Achilles' knockout analysis revealed that COPZ1 was vital for many tumor cells' survival. We further demonstrated that the high expression level of COPZ1 in tumors was regulated in multi-aspects, including abnormal CNV, DNA-methylation, transcription factor and microRNAs. As for the functional exploration of COPZ1, we found a positive relationship between COPZ1's expression and stemness and hypoxia signature, especially the contribution of COPZ1 on EMT ability in SARC. GSEA analysis revealed that COPZ1 was associated with many immune response pathways. Further investigation demonstrated that COPZ expression was negatively correlated with immune score and stromal score, and low expression of COPZ1 has been associated to more antitumor immune cell infiltration and pro-inflammatory cytokines. The further analysis of COPZ1 expression and anti-inflammatory M2 cells showed a consistent result. Finally, we verified the expression of COPZ1 in HCC cells, and proved its ability of sustaining tumor growth and invasion with biological experiments. Our study provides a multi-dimensional pan-cancer analysis of COPZ and demonstrates that COPZ1 can serve as both a prospective target for the treatment of cancer and a prognostic marker for a variety of cancer types.
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Affiliation(s)
- Ye Hong
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Pediatric Oncology, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Zengfei Xia
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Experimental Research, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Yuting Sun
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Yingxia Lan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Pediatric Oncology, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Tian Di
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Experimental Research, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Jing Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Jian Sun
- Department of Clinical Research, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510060, China
| | - Miaozhen Qiu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
| | - Qiuyun Luo
- Department of Cancer Research, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen 518033, China
| | - Dajun Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Experimental Research, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China
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18
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He R, Li Y, Bernards MA, Wang A. Manipulation of the Cellular Membrane-Cytoskeleton Network for RNA Virus Replication and Movement in Plants. Viruses 2023; 15:744. [PMID: 36992453 PMCID: PMC10056259 DOI: 10.3390/v15030744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/10/2023] [Accepted: 03/11/2023] [Indexed: 03/15/2023] Open
Abstract
Viruses infect all cellular life forms and cause various diseases and significant economic losses worldwide. The majority of viruses are positive-sense RNA viruses. A common feature of infection by diverse RNA viruses is to induce the formation of altered membrane structures in infected host cells. Indeed, upon entry into host cells, plant-infecting RNA viruses target preferred organelles of the cellular endomembrane system and remodel organellar membranes to form organelle-like structures for virus genome replication, termed as the viral replication organelle (VRO) or the viral replication complex (VRC). Different viruses may recruit different host factors for membrane modifications. These membrane-enclosed virus-induced replication factories provide an optimum, protective microenvironment to concentrate viral and host components for robust viral replication. Although different viruses prefer specific organelles to build VROs, at least some of them have the ability to exploit alternative organellar membranes for replication. Besides being responsible for viral replication, VROs of some viruses can be mobile to reach plasmodesmata (PD) via the endomembrane system, as well as the cytoskeleton machinery. Viral movement protein (MP) and/or MP-associated viral movement complexes also exploit the endomembrane-cytoskeleton network for trafficking to PD where progeny viruses pass through the cell-wall barrier to enter neighboring cells.
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Affiliation(s)
- Rongrong He
- London Research and Development Centre, Agriculture and Agri-Food Canada, 1391 Sandford St., London, ON N5V 4T3, Canada
- Department of Biology, University of Western Ontario, 1151 Richmond St. N., London, ON N6A 5B7, Canada
| | - Yinzi Li
- London Research and Development Centre, Agriculture and Agri-Food Canada, 1391 Sandford St., London, ON N5V 4T3, Canada
| | - Mark A. Bernards
- Department of Biology, University of Western Ontario, 1151 Richmond St. N., London, ON N6A 5B7, Canada
| | - Aiming Wang
- London Research and Development Centre, Agriculture and Agri-Food Canada, 1391 Sandford St., London, ON N5V 4T3, Canada
- Department of Biology, University of Western Ontario, 1151 Richmond St. N., London, ON N6A 5B7, Canada
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A Data-Mining Approach to Identify NF-kB-Responsive microRNAs in Tissues Involved in Inflammatory Processes: Potential Relevance in Age-Related Diseases. Int J Mol Sci 2023; 24:ijms24065123. [PMID: 36982191 PMCID: PMC10049099 DOI: 10.3390/ijms24065123] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/02/2023] [Accepted: 03/04/2023] [Indexed: 03/11/2023] Open
Abstract
The nuclear factor NF-kB is the master transcription factor in the inflammatory process by modulating the expression of pro-inflammatory genes. However, an additional level of complexity is the ability to promote the transcriptional activation of post-transcriptional modulators of gene expression as non-coding RNA (i.e., miRNAs). While NF-kB’s role in inflammation-associated gene expression has been extensively investigated, the interplay between NF-kB and genes coding for miRNAs still deserves investigation. To identify miRNAs with potential NF-kB binding sites in their transcription start site, we predicted miRNA promoters by an in silico analysis using the PROmiRNA software, which allowed us to score the genomic region’s propensity to be miRNA cis-regulatory elements. A list of 722 human miRNAs was generated, of which 399 were expressed in at least one tissue involved in the inflammatory processes. The selection of “high-confidence” hairpins in miRbase identified 68 mature miRNAs, most of them previously identified as inflammamiRs. The identification of targeted pathways/diseases highlighted their involvement in the most common age-related diseases. Overall, our results reinforce the hypothesis that persistent activation of NF-kB could unbalance the transcription of specific inflammamiRNAs. The identification of such miRNAs could be of diagnostic/prognostic/therapeutic relevance for the most common inflammatory-related and age-related diseases.
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20
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Hamidi AA, Taghehchian N, Zangouei AS, Akhlaghipour I, Maharati A, Basirat Z, Moghbeli M. Molecular mechanisms of microRNA-216a during tumor progression. Cancer Cell Int 2023; 23:19. [PMID: 36740668 PMCID: PMC9899407 DOI: 10.1186/s12935-023-02865-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/02/2023] [Indexed: 02/07/2023] Open
Abstract
MicroRNAs (miRNAs) as the members of non-coding RNAs family are involved in post-transcriptional regulation by translational inhibiting or mRNA degradation. They have a critical role in regulation of cell proliferation and migration. MiRNAs aberrations have been reported in various cancers. Considering the importance of these factors in regulation of cellular processes and their high stability in body fluids, these factors can be suggested as suitable non-invasive markers for the cancer diagnosis. MiR-216a deregulation has been frequently reported in different cancers. Therefore, in the present review we discussed the molecular mechanisms of the miR-216a during tumor progression. It has been reported that miR-216a mainly functioned as a tumor suppressor through the regulation of signaling pathways and transcription factors. This review paves the way to suggest the miR-216a as a probable therapeutic and diagnostic target in cancer patients.
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Affiliation(s)
- Amir Abbas Hamidi
- grid.411583.a0000 0001 2198 6209Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Negin Taghehchian
- grid.411583.a0000 0001 2198 6209Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Sadra Zangouei
- grid.411583.a0000 0001 2198 6209Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Iman Akhlaghipour
- grid.411583.a0000 0001 2198 6209Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amirhosein Maharati
- grid.411583.a0000 0001 2198 6209Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Basirat
- grid.411583.a0000 0001 2198 6209Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meysam Moghbeli
- grid.411583.a0000 0001 2198 6209Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran ,grid.411583.a0000 0001 2198 6209Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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21
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Korade Z, Tallman KA, Kim HYH, Balog M, Genaro-Mattos TC, Pattnaik A, Mirnics K, Pattnaik AK, Porter NA. Dose-Response Effects of 7-Dehydrocholesterol Reductase Inhibitors on Sterol Profiles and Vesicular Stomatitis Virus Replication. ACS Pharmacol Transl Sci 2022; 5:1086-1096. [PMID: 36407960 PMCID: PMC9667548 DOI: 10.1021/acsptsci.2c00051] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Indexed: 11/29/2022]
Abstract
Cholesterol is ubiquitous in cells; it plays a critical role in membrane structure and transport as well as in intracellular trafficking processes. There are suggestions that cholesterol metabolism is linked to innate immunity with inhibitors of DHCR7, the last enzyme in the cholesterol pathway, suggested to have potential as viral therapeutics nearly a decade ago. In fact, there are a number of highly prescribed pharmaceuticals that are off-target inhibitors of DHCR7, causing increased cellular levels of 7-dehydrodesmosterol (7-DHD) and 7-dehydrocholesterol (7-DHC). We report here dose-response studies of six such inhibitors on late-stage cholesterol biosynthesis in Neuro2a cells as well as their effect on infection of vesicular stomatitis virus (VSV). Four of the test compounds are FDA-approved drugs (cariprazine, trazodone, metoprolol, and tamoxifen), one (ifenprodil) has been the object of a recent Phase 2b COVID trial, and one (AY9944) is an experimental compound that has seen extensive use as a DHCR7 inhibitor. The three FDA-approved drugs inhibit replication of a GFP-tagged VSV with efficacies that mirror their effect on DHCR7. Ifenprodil and AY9944 have complex inhibitory profiles, acting on both DHCR7 and DHCR14, while tamoxifen does not inhibit DHCR7 and is toxic to Neuro2a at concentrations where it inhibits the Δ7-Δ8 isomerase of the cholesterol pathway. VSV itself affects the sterol profile in Neuro2a cells, showing a dose-response increase of dehydrolathosterol and lathosterol, the substrates for DHCR7, with a corresponding decrease in desmosterol and cholesterol. 7-DHD and 7-DHC are orders of magnitude more vulnerable to free radical chain oxidation than other sterols as well as polyunsaturated fatty esters, and the effect of these sterols on viral infection is likely a reflection of this fact of Nature.
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Affiliation(s)
- Zeljka Korade
- Department
of Pediatrics, Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Keri A. Tallman
- Department
of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Hye-Young H. Kim
- Department
of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Marta Balog
- Munroe-Meyer
Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha, Nebraska 68105, United States
- Department
of Medical Biology and Genetics, Faculty of Medicine, J. J. Strossmayer University of Osijek, Osijek 31000, Croatia
| | - Thiago C. Genaro-Mattos
- Munroe-Meyer
Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha, Nebraska 68105, United States
| | - Aryamav Pattnaik
- Nebraska
Center for Virology and School of Veterinary Medicine and Biomedical
Sciences, University of Nebraska-Lincoln, Lincoln 68583, United States
| | - Károly Mirnics
- Munroe-Meyer
Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha, Nebraska 68105, United States
| | - Asit K. Pattnaik
- Nebraska
Center for Virology and School of Veterinary Medicine and Biomedical
Sciences, University of Nebraska-Lincoln, Lincoln 68583, United States
| | - Ned A. Porter
- Department
of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
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22
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Chen S, Li H, Chen S, Wang B, Zhang K. BMI1 promotes the proliferation and inhibits autophagy of breast cancer cells by activating COPZ1. Clin Transl Oncol 2022; 24:2166-2174. [PMID: 35789980 DOI: 10.1007/s12094-022-02869-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
PURPOSE This study was designed to explore the role of COPZ1 in breast cancer as well as discuss its specific reaction mechanism. METHODS With the help of RT-qPCR and western blot, the expression of BMI1 and COPZ1 were measured. Then, the proliferation, colony formation and apoptosis were evaluated by CCK-8, colony formation and TUNEL assays, separately. Luciferase reporter assay and ChIP were applied to assess the relative activity of COPZ1 promoter as well as its binding with BMI1. Moreover, western blot was utilized to measure the expression of proliferation-, apoptosis- and autophagy-related proteins. RESULTS According to GEPIA2 database, COPZ1 was upregulated in breast cancer tissues and was associated with the poor prognosis (P = 0.03). Results obtained from RT-qPCR and western blot verified that COPZ1 expression was greatly increased at both mRNA and protein levels in breast cancer cells as compared to control cells (P < 0.05 or P < 0.001). COPZ1 knockdown inhibited the proliferation, induced the autophagy and promoted the apoptosis of breast cancer cells. HumanTFDB predicted the binding sites of BMI1 and COPZ1. The increased relative luciferase activity of COPZ1 promoter following BMI1 overexpression (P < 0.001) and the binding of BMI1 with COPZ1 promoter indicated that BMI1 could activate COPZ1. Further experiments suggested that the effects of COPZ1 knockdown on the proliferation, apoptosis and autophagy of breast cancer cells were reversed by BMI1 overexpression, implying that BMI1 promoted the proliferation and repressed the autophagy of breast cancer cells via activating COPZ1. CONCLUSIONS To sum up, BMI1 exhibited promotive effects on the malignant progression of breast cancer through the activation of COPZ1. These findings might offer a preliminary theoretical basis for COPZ1 participation in autophagy in breast cancer cells.
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Affiliation(s)
- Shuming Chen
- Department of General Surgery, 900 Hospital of the Joint Logistics Supports Force, Fuzhou, 350025, Fujian, China
| | - He Li
- Department of General Surgery, 900 Hospital of the Joint Logistics Supports Force, Fuzhou, 350025, Fujian, China
| | - Siyu Chen
- Department of Oncology, 900 Hospital of the Joint Logistics Supports Force, No.156 West Second Ring North Road, Gulou District, Fuzhou, 350025, Fujian, China
| | - Bing Wang
- Department of General Surgery, 900 Hospital of the Joint Logistics Supports Force, Fuzhou, 350025, Fujian, China
| | - Kaixiang Zhang
- Department of Oncology, 900 Hospital of the Joint Logistics Supports Force, No.156 West Second Ring North Road, Gulou District, Fuzhou, 350025, Fujian, China.
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23
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Identification of two pathways mediating protein targeting from ER to lipid droplets. Nat Cell Biol 2022; 24:1364-1377. [PMID: 36050470 PMCID: PMC9481466 DOI: 10.1038/s41556-022-00974-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 07/05/2022] [Indexed: 11/20/2022]
Abstract
Pathways localizing proteins to their sites of action are essential for eukaryotic cell organization and function. Although mechanisms of protein targeting to many organelles have been defined, how proteins, such as metabolic enzymes, target from the endoplasmic reticulum (ER) to cellular lipid droplets (LDs) is poorly understood. Here we identify two distinct pathways for ER-to-LD protein targeting: early targeting at LD formation sites during formation, and late targeting to mature LDs after their formation. Using systematic, unbiased approaches in Drosophila cells, we identified specific membrane-fusion machinery, including regulators, a tether and SNARE proteins, that are required for the late targeting pathway. Components of this fusion machinery localize to LD–ER interfaces and organize at ER exit sites. We identified multiple cargoes for early and late ER-to-LD targeting pathways. Our findings provide a model for how proteins target to LDs from the ER either during LD formation or by protein-catalysed formation of membrane bridges. Song et al. identify two protein-targeting pathways from the endoplasmic reticulum to (1) early lipid droplets (LDs) and (2) mature lipid droplets. They define key factors mediating the second, late pathway and its many cargoes.
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24
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Rui Q, Tan X, Liu F, Bao Y. An Update on the Key Factors Required for Plant Golgi Structure Maintenance. FRONTIERS IN PLANT SCIENCE 2022; 13:933283. [PMID: 35837464 PMCID: PMC9274083 DOI: 10.3389/fpls.2022.933283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Plant Golgi apparatus serves as the central station of the secretory pathway and is the site where protein modification and cell wall matrix polysaccharides synthesis occur. The polarized and stacked cisternal structure is a prerequisite for Golgi function. Our understanding of Golgi structure maintenance and trafficking are largely obtained from mammals and yeast, yet, plant Golgi has many different aspects. In this review, we summarize the key players in Golgi maintenance demonstrated by genetic studies in plants, which function in ER-Golgi, intra-Golgi and post-Golgi transport pathways. Among these, we emphasize on players in intra-Golgi trafficking.
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25
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Herrera-Estala AL, Fuentes-Garibay JA, Guerrero-Olazarán M, Viader-Salvadó JM. Low specific growth rate and temperature in fed-batch cultures of a beta-propeller phytase producing Pichia pastoris strain under GAP promoter trigger increased KAR2 and PSA1-1 gene expression yielding enhanced extracellular productivity. J Biotechnol 2022; 352:59-67. [PMID: 35618082 DOI: 10.1016/j.jbiotec.2022.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 01/30/2023]
Abstract
Previously, we showed that the methylotrophic yeast Pichia pastoris (syn. Komagataella phaffii) could produce and secrete the beta-propeller phytase FTEII in an active form under the control of the AOX1 promoter and methanol as the inductor. In this work, we engineered P. pastoris strains to construct a constitutive P. pastoris expression system (GAP promoter) and extracellularly produce the phytase FTEII. We optimized the culture conditions to increase the extracellular volumetric phytase productivity (Qp) and evaluated the impact of the optimization process on the physiological response of the host. Moreover, we analyzed the expression levels of the FTEII gene and endogenous genes for P. pastoris cells in cultures with the lowest and highest Qp to understand which processes (from heterologous gene expression to protein secretion) might be responsible for the increase in Qp. The results indicate that a low specific growth rate and temperature in the fed-batch phase increases the Qp, which was correlated with an upregulation of the KAR2 and PSA1-1/MPG1 genes rather than increased heterologous gene transcription.
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Affiliation(s)
- Ana Lucía Herrera-Estala
- Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Biológicas, Instituto de Biotecnología, 66455 San Nicolás de los Garza, N.L., Mexico
| | - José Antonio Fuentes-Garibay
- Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Biológicas, Instituto de Biotecnología, 66455 San Nicolás de los Garza, N.L., Mexico
| | - Martha Guerrero-Olazarán
- Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Biológicas, Instituto de Biotecnología, 66455 San Nicolás de los Garza, N.L., Mexico
| | - José María Viader-Salvadó
- Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Biológicas, Instituto de Biotecnología, 66455 San Nicolás de los Garza, N.L., Mexico.
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26
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Feng Y, Sun C, Zhang L, Wan H, Zhou H, Chen Y, Zhu L, Xia G, Mi Y. Upregulation of COPB2 Promotes Prostate Cancer Proliferation and Invasion Through the MAPK/TGF-β Signaling Pathway. Front Oncol 2022; 12:865317. [PMID: 35600351 PMCID: PMC9120942 DOI: 10.3389/fonc.2022.865317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 04/11/2022] [Indexed: 12/29/2022] Open
Abstract
There is increasing evidence that coatomer protein complex subunit beta 2 (COPB2) plays an important role in various cancer types. This study explored the role and the downstream mediators of COPB2 in prostate cancer (PCa). The expression of COPB2 was determined by the Cancer Genome Atlas database and enzyme-linked immunosorbent assay. COPB2 expression was upregulated in PCa tissues and correlated with Gleason score, biochemical recurrence, and poor prognosis. The functional roles of COPB2 in PCa were verified through a series of experiments. Knocking down COPB2 expression inhibited the growth and clonogenesis of PCa cells, promoted cell apoptosis, and inhibited the ability of scratch repair, invasion of PCa cells, and tumor growth in Nude mice. To analyze downstream signaling pathways, ingenuity pathway analysis, GSEA, and whole-genome expression spectrum GeneChip analysis were used. Western blot revealed that COPB2 expression promoted the proliferation and invasion of PCa cells by regulating the MAPK/TGF-β signaling pathway. The interacting protein (nuclear protein 1, NUPR1) was identified via Co-IP, real-time PCR, Western blot, and TCGA database in sampled tissues. The expressions of the interaction proteins NUPR1 and COPB2 were negatively regulated by each other. COPB2 could be a new biomarker for PCa diagnosis and monitoring and to provide a theoretical basis for identifying effective drug intervention targets through in-depth mechanistic studies.
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Affiliation(s)
- Yanyan Feng
- Wuxi Medical College, Jiangnan University, Wuxi, China
- Department of Urology, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Chuanyu Sun
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, China
| | - Lifeng Zhang
- Department of Urology, Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou, China
| | - Hongyuan Wan
- Wuxi Medical College, Jiangnan University, Wuxi, China
- Department of Urology, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Hangsheng Zhou
- Wuxi Medical College, Jiangnan University, Wuxi, China
- Department of Urology, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Yongquan Chen
- Wuxi Medical College, Jiangnan University, Wuxi, China
| | - Lijie Zhu
- Department of Urology, Affiliated Hospital of Jiangnan University, Wuxi, China
- *Correspondence: Yuanyuan Mi, ; Lijie Zhu, ; Guowei Xia, ;
| | - Guowei Xia
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, China
- *Correspondence: Yuanyuan Mi, ; Lijie Zhu, ; Guowei Xia, ;
| | - Yuanyuan Mi
- Department of Urology, Affiliated Hospital of Jiangnan University, Wuxi, China
- *Correspondence: Yuanyuan Mi, ; Lijie Zhu, ; Guowei Xia, ;
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27
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Steiner A, Hrovat-Schaale K, Prigione I, Yu CH, Laohamonthonkul P, Harapas CR, Low RRJ, De Nardo D, Dagley LF, Mlodzianoski MJ, Rogers KL, Zillinger T, Hartmann G, Gantier MP, Gattorno M, Geyer M, Volpi S, Davidson S, Masters SL. Deficiency in coatomer complex I causes aberrant activation of STING signalling. Nat Commun 2022; 13:2321. [PMID: 35484149 PMCID: PMC9051092 DOI: 10.1038/s41467-022-29946-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 04/05/2022] [Indexed: 12/15/2022] Open
Abstract
Coatomer complex I (COPI) mediates retrograde vesicular trafficking from Golgi to the endoplasmic reticulum (ER) and within Golgi compartments. Deficiency in subunit alpha causes COPA syndrome and is associated with type I IFN signalling, although the upstream innate immune sensor involved was unknown. Using in vitro models we find aberrant activation of the STING pathway due to deficient retrograde but probably not intra-Golgi transport. Further we find the upstream cytosolic DNA sensor cGAS as essentially required to drive type I IFN signalling. Genetic deletion of COPI subunits COPG1 or COPD similarly induces type I IFN activation in vitro, which suggests that inflammatory diseases associated with mutations in other COPI subunit genes may exist. Finally, we demonstrate that inflammation in COPA syndrome patient peripheral blood mononuclear cells and COPI-deficient cell lines is ameliorated by treatment with the small molecule STING inhibitor H-151, suggesting targeted inhibition of the cGAS/STING pathway as a promising therapeutic approach.
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Affiliation(s)
- Annemarie Steiner
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
- Institute of Structural Biology, University Hospital Bonn, 53127, Bonn, Germany
| | - Katja Hrovat-Schaale
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Ignazia Prigione
- Centre for Autoinflammatory Diseases and Primary Immunodeficiencies, IRCCS Istituto Giannina Gaslini, 16147, Genoa, Italy
| | - Chien-Hsiung Yu
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Pawat Laohamonthonkul
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Cassandra R Harapas
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Ronnie Ren Jie Low
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
- Personalised Oncology Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Dominic De Nardo
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3168, Australia
| | - Laura F Dagley
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
- Advanced Technology and Biology, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Michael J Mlodzianoski
- Center for Dynamic Imaging, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Kelly L Rogers
- Center for Dynamic Imaging, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Thomas Zillinger
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, 53127, Bonn, Germany
- Institute of Immunology, Philipps-University Marburg, BMFZ, 35043, Marburg, Germany
| | - Gunther Hartmann
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, 53127, Bonn, Germany
- German Centre for Infection Research (DZIF), partner site Bonn-Cologne, 53127, Bonn, Germany
| | - Michael P Gantier
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC, 3168, Australia
- Department of Molecular and Translational Science, Monash University, Clayton, VIC, 3168, Australia
| | - Marco Gattorno
- Centre for Autoinflammatory Diseases and Primary Immunodeficiencies, IRCCS Istituto Giannina Gaslini, 16147, Genoa, Italy
| | - Matthias Geyer
- Institute of Structural Biology, University Hospital Bonn, 53127, Bonn, Germany
| | - Stefano Volpi
- Centre for Autoinflammatory Diseases and Primary Immunodeficiencies, IRCCS Istituto Giannina Gaslini, 16147, Genoa, Italy
- University of Genoa, 16126, Genoa, Italy
| | - Sophia Davidson
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Seth L Masters
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia.
- Department of Medical Biology, University of Melbourne, Parkville, VIC, 3010, Australia.
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28
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Phenotype to genotype in Neurospora crassa: Association of the scumbo phenotype with mutations in the gene encoding ceramide C9-methyltransferase. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100117. [PMID: 35909622 PMCID: PMC9325734 DOI: 10.1016/j.crmicr.2022.100117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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29
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Zhang Y, Lin Y, Lv D, Wu X, Li W, Wang X, Jiang D. Identification and validation of a novel signature for prediction the prognosis and immunotherapy benefit in bladder cancer. PeerJ 2022; 10:e12843. [PMID: 35127296 PMCID: PMC8796709 DOI: 10.7717/peerj.12843] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 01/06/2022] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Bladder cancer (BC) is a common urinary tract system tumor with high recurrence rate and different populations show distinct response to immunotherapy. Novel biomarkers that can accurately predict prognosis and therapeutic responses are urgently needed. Here, we aim to identify a novel prognostic and therapeutic responses immune-related gene signature of BC through a comprehensive bioinformatics analysis. METHODS The robust rank aggregation was conducted to integrate differently expressed genes (DEGs) in datasets of the Cancer Genome Atlas (TCGA) and the gene expression omnibus (GEO). Lasso and Cox regression analyses were performed to formulate a novel mRNA signature that could predict prognosis of BC patients. Subsequently, the prognostic value and predictive value of the signature was validated with two independent cohorts GSE13507 and IMvigor210. Finally, quantitative Real-time PCR (qRT-PCR) analysis was conducted to determine the expression of mRNAs in BC cell lines (UM-UC-3, EJ-1, SW780 and T24). RESULTS We built a signature comprised the eight mRNAs: CNKSR1, COPZ2, CXorf57, FASN, PCOLCE2, RGS1, SPINT1 and TPST1. Our prognostic signature could be used to stratify BC population into two risk groups with distinct immune profile and responsiveness to immunotherapy. The results of qRT-PCR demonstrated that the eight mRNAs exhibited different expression levels in BC cell lines. CONCLUSION Our study constructed a convenient and reliable 8-mRNA gene signature, which might provide prognostic prediction and aid treatment decision making of BC patients in clinical practice.
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Affiliation(s)
- Yichi Zhang
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China,Nanshan School, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yifeng Lin
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China,Department of Urology, Meizhou Hospital of Traditional Chinese Medicine, Meizhou, China
| | - Daojun Lv
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiangkun Wu
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wenjie Li
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xueqing Wang
- Department of Ultrasound, Shantou Central Hospital, Shantou, Guangdong, China
| | - Dongmei Jiang
- Department of Pathology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangzhou, China
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30
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Saito-Nakano Y, Makiuchi T, Tochikura M, Gilchrist CA, Petri WA, Nozaki T. ArfX2 GTPase Regulates Trafficking From the Trans-Golgi to Lysosomes and Is Necessary for Liver Abscess Formation in the Protozoan Parasite Entamoeba histolytica. Front Cell Infect Microbiol 2022; 11:794152. [PMID: 34976870 PMCID: PMC8719317 DOI: 10.3389/fcimb.2021.794152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 11/24/2021] [Indexed: 02/03/2023] Open
Abstract
Entamoeba histolytica is the causative agent of amoebic dysentery and liver abscess in humans. The parasitic lifestyle and the virulence of the protist require elaborate biological processes, including vesicular traffic and stress management against a variety of reactive oxygen and nitrogen species produced by the host immune response. Although the mechanisms for intracellular traffic of representative virulence factors have been investigated at molecular levels, it remains poorly understood whether and how intracellular traffic is involved in the defense against reactive oxygen and nitrogen species. Here, we demonstrate that EhArfX2, one of the Arf family of GTPases known to be involved in the regulation of vesicular traffic, was identified by comparative transcriptomic analysis of two isogenic strains: an animal-passaged highly virulent HM-1:IMSS Cl6 and in vitro maintained attenuated avirulent strain. EhArfX2 was identified as one of the most highly upregulated genes in the highly virulent strain. EhArfX2 was localized to small vesicle-like structures and largely colocalized with the marker for the trans-Golgi network SNARE, EhYkt6, but neither with the endoplasmic reticulum (ER)-resident chaperon, EhBip, nor the cis-Golgi SNARE, EhSed5, and Golgi-luminal galactosyl transferase, EhGalT. Expression of the dominant-active mutant form of EhArfX2 caused an increase in the number of lysosomes, while expression of the dominant-negative mutant led to a defect in lysosome formation and cysteine protease transport to lysosomes. Expression of the dominant-negative mutant in the virulent E. histolytica strain caused a reduction of the size of liver abscesses in a hamster model. This defect in liver abscess formation was likely at least partially attributed to reduced resistance to nitrosative, but not oxidative stress in vitro. These results showed that the EhArfX2-mediated traffic is necessary for the nitrosative stress response and virulence in the host.
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Affiliation(s)
- Yumiko Saito-Nakano
- Department of Parasitology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Takashi Makiuchi
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Mami Tochikura
- Department of Parasitology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo, Japan
| | - Carol A Gilchrist
- Department of Medicine, University of Virginia, Charlottesville, VA, United States
| | - William A Petri
- Department of Medicine, University of Virginia, Charlottesville, VA, United States
| | - Tomoyoshi Nozaki
- Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan
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31
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Hellicar J, Stevenson NL, Stephens DJ, Lowe M. Supply chain logistics - the role of the Golgi complex in extracellular matrix production and maintenance. J Cell Sci 2022; 135:273996. [PMID: 35023559 PMCID: PMC8767278 DOI: 10.1242/jcs.258879] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The biomechanical and biochemical properties of connective tissues are determined by the composition and quality of their extracellular matrix. This, in turn, is highly dependent on the function and organisation of the secretory pathway. The Golgi complex plays a vital role in directing matrix output by co-ordinating the post-translational modification and proteolytic processing of matrix components prior to their secretion. These modifications have broad impacts on the secretion and subsequent assembly of matrix components, as well as their function in the extracellular environment. In this Review, we highlight the role of the Golgi in the formation of an adaptable, healthy matrix, with a focus on proteoglycan and procollagen secretion as example cargoes. We then discuss the impact of Golgi dysfunction on connective tissue in the context of human disease and ageing.
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Affiliation(s)
- John Hellicar
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK.,Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673
| | - Nicola L Stevenson
- Cell Biology Laboratories, School of Biochemistry, Faculty of Life Sciences, University Walk, University of Bristol, Bristol, BS8 1TD, UK
| | - David J Stephens
- Cell Biology Laboratories, School of Biochemistry, Faculty of Life Sciences, University Walk, University of Bristol, Bristol, BS8 1TD, UK
| | - Martin Lowe
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK
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Chen SY, Xu XX, Li X, Yi NB, Li SZ, Xiang XC, Cheng DB, Sun T. Recent advances in the intracellular delivery of macromolecule therapeutics. Biomater Sci 2022; 10:6642-6655. [DOI: 10.1039/d2bm01348g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review summarizes the uptake pathway of intracellular delivery vehicles for macromolecule therapeutics, and provides in-depth discussions and prospects about intracellular delivery of macromolecule therapeutics.
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Affiliation(s)
- Si-Yi Chen
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
| | - Xiao-Xue Xu
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
| | - Xin Li
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
| | - Ning-Bo Yi
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
| | - Shi-Zhuo Li
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
| | - Xing-Cheng Xiang
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
| | - Dong-Bing Cheng
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
| | - Taolei Sun
- School of Chemistry, Chemical Engineering & Life Science, Wuhan University of Technology, No. 122 Luoshi Road, Wuhan, 430070, PR China
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Qiu S, Lavallée-Adam M, Côté M. Proximity Interactome Map of the Vac14-Fig4 Complex Using BioID. J Proteome Res 2021; 20:4959-4973. [PMID: 34554760 DOI: 10.1021/acs.jproteome.1c00408] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Conversion between phosphatidylinositol-3-phosphate and phosphatidylinositol-3,5-bisphosphate on endosomal membranes is critical for the maturation of early endosomes to late endosomes/lysosomes and is regulated by the PIKfyve-Vac14-Fig4 complex. Despite the importance of this complex for endosomal homeostasis and vesicular trafficking, there is little known about how its activity is regulated or how it interacts with other cellular proteins. Here, we screened for the cellular interactome of Vac14 and Fig4 using proximity-dependent biotin labeling (BioID). After independently screening the interactomes of Vac14 and Fig4, we identified 89 high-confidence protein hits shared by both proteins. Network analysis of these hits revealed pathways with known involvement of the PIKfyve-Vac14-Fig4 complex, including vesicular organization and PI3K/Akt signaling, as well as novel pathways including cell cycle and mitochondrial regulation. We also identified subunits of coatomer complex I (COPI), a Golgi-associated complex with an emerging role in endosomal dynamics. Using proximity ligation assays, we validated the interaction between Vac14 and COPI subunit COPB1 and between Vac14 and Arf1, a GTPase required for COPI assembly. In summary, this study used BioID to comprehensively map the Vac14-Fig4 interactome, revealing potential roles for these proteins in diverse cellular processes and pathways, including preliminary evidence of an interaction between Vac14 and COPI. Data are available via ProteomeXchange with the identifier PXD027917.
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Affiliation(s)
- Shirley Qiu
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada.,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa K1H 8M5, Canada.,Centre for Infection, Immunity, and Inflammation, University of Ottawa, Ottawa K1H 8M5, Canada
| | - Mathieu Lavallée-Adam
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada.,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa K1H 8M5, Canada
| | - Marceline Côté
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa K1H 8M5, Canada.,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa K1H 8M5, Canada.,Centre for Infection, Immunity, and Inflammation, University of Ottawa, Ottawa K1H 8M5, Canada
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Faria M, Domingues R, Bugalho MJ, Silva AL, Matos P. Analysis of NIS Plasma Membrane Interactors Discloses Key Regulation by a SRC/RAC1/PAK1/PIP5K/EZRIN Pathway with Potential Implications for Radioiodine Re-Sensitization Therapy in Thyroid Cancer. Cancers (Basel) 2021; 13:5460. [PMID: 34771624 PMCID: PMC8582450 DOI: 10.3390/cancers13215460] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/14/2021] [Accepted: 10/27/2021] [Indexed: 12/25/2022] Open
Abstract
The functional expression of the sodium-iodide symporter (NIS) at the membrane of differentiated thyroid cancer (DTC) cells is the cornerstone for the use of radioiodine (RAI) therapy in these malignancies. However, NIS gene expression is frequently downregulated in malignant thyroid tissue, and 30% to 50% of metastatic DTCs become refractory to RAI treatment, which dramatically decreases patient survival. Several strategies have been attempted to increase the NIS mRNA levels in refractory DTC cells, so as to re-sensitize refractory tumors to RAI. However, there are many RAI-refractory DTCs in which the NIS mRNA and protein levels are relatively abundant but only reduced levels of iodide uptake are detected, suggesting a posttranslational failure in the delivery of NIS to the plasma membrane (PM), or an impaired residency at the PM. Because little is known about the molecules and pathways regulating NIS delivery to, and residency at, the PM of thyroid cells, we here employed an intact-cell labeling/immunoprecipitation methodology to selectively purify NIS-containing macromolecular complexes from the PM. Using mass spectrometry, we characterized and compared the composition of NIS PM complexes to that of NIS complexes isolated from whole cell (WC) lysates. Applying gene ontology analysis to the obtained MS data, we found that while both the PM-NIS and WC-NIS datasets had in common a considerable number of proteins involved in vesicle transport and protein trafficking, the NIS PM complexes were particularly enriched in proteins associated with the regulation of the actin cytoskeleton. Through a systematic validation of the detected interactions by co-immunoprecipitation and Western blot, followed by the biochemical and functional characterization of the contribution of each interactor to NIS PM residency and iodide uptake, we were able to identify a pathway by which the PM localization and function of NIS depends on its binding to SRC kinase, which leads to the recruitment and activation of the small GTPase RAC1. RAC1 signals through PAK1 and PIP5K to promote ARP2/3-mediated actin polymerization, and the recruitment and binding of the actin anchoring protein EZRIN to NIS, promoting its residency and function at the PM of normal and TC cells. Besides providing novel insights into the regulation of NIS localization and function at the PM of TC cells, our results open new venues for therapeutic intervention in TC, namely the possibility of modulating abnormal SRC signaling in refractory TC from a proliferative/invasive effect to the re-sensitization of these tumors to RAI therapy by inducing NIS retention at the PM.
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Affiliation(s)
- Márcia Faria
- Serviço de Endocrinologia, Diabetes e Metabolismo do CHULN-Hospital Santa Maria, 1649-028 Lisboa, Portugal; (M.F.); (R.D.); (M.J.B.); (A.L.S.)
- BioISI-Biosystems and Integrative Sciences Institute, Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, Portugal
- Departamento de Genética Humana, Instituto Nacional de Saúde Doutor Ricardo Jorge, 1649-016 Lisboa, Portugal
| | - Rita Domingues
- Serviço de Endocrinologia, Diabetes e Metabolismo do CHULN-Hospital Santa Maria, 1649-028 Lisboa, Portugal; (M.F.); (R.D.); (M.J.B.); (A.L.S.)
- ISAMB-Instituto de Saúde Ambiental, Faculdade de Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Maria João Bugalho
- Serviço de Endocrinologia, Diabetes e Metabolismo do CHULN-Hospital Santa Maria, 1649-028 Lisboa, Portugal; (M.F.); (R.D.); (M.J.B.); (A.L.S.)
- Serviço de Endocrinologia, Diabetes e Metabolismo, CHULN and Faculdade de Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Ana Luísa Silva
- Serviço de Endocrinologia, Diabetes e Metabolismo do CHULN-Hospital Santa Maria, 1649-028 Lisboa, Portugal; (M.F.); (R.D.); (M.J.B.); (A.L.S.)
- ISAMB-Instituto de Saúde Ambiental, Faculdade de Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
- Serviço de Endocrinologia, Diabetes e Metabolismo, CHULN and Faculdade de Medicina da Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Paulo Matos
- BioISI-Biosystems and Integrative Sciences Institute, Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, Portugal
- Departamento de Genética Humana, Instituto Nacional de Saúde Doutor Ricardo Jorge, 1649-016 Lisboa, Portugal
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An Integrative Pan-Cancer Analysis of the Oncogenic Role of COPB2 in Human Tumors. BIOMED RESEARCH INTERNATIONAL 2021; 2021:7405322. [PMID: 34676262 PMCID: PMC8526247 DOI: 10.1155/2021/7405322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/09/2021] [Accepted: 09/23/2021] [Indexed: 01/13/2023]
Abstract
Several studies have suggested that coatomer protein complex subunit beta 2 (COPB2) may act as an oncogene in various cancer types. However, no systematic pan-cancer analysis has been performed to date. Therefore, the present study analyzed the potential oncogenic role of COPB2 using TCGA (The Cancer Genome Atlas) and GEO (Gene Expression Omnibus) datasets. The majority of the cancer types overexpressed the COPB2 protein, and its expression significantly correlated with tumor prognosis. In certain tumors, such as those found in breast and ovarian tissues, phosphorylated S859 exhibited high expression. It was found that mutations of the COPB2 protein in kidney and endometrial cancers exhibited a significant impact on patient prognosis. It is interesting to note that COPB2 expression correlated with the number of cancer-associated fibroblasts in certain tumors, such as cervical and endocervical cancers and colon adenocarcinomas. In addition, COPB2 was involved in the transport of substances and correlated with chemotherapy sensitivity. This is considered the first pan-tumor study, which provided a relatively comprehensive understanding of the mechanism by which COPB2 promotes cancer growth.
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36
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Sui B, Wang M, Cheng C, Zhang Q, Zhang J, Fan D, Xu P. Nanogel-facilitated Protein Intracellular Specific Degradation through Trim-Away. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2010556. [PMID: 34421476 PMCID: PMC8376022 DOI: 10.1002/adfm.202010556] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Indexed: 05/10/2023]
Abstract
Recently discovered "Trim-Away" mechanism opens a new window for fast and selective degradation of endogenous proteins. However, the in vivo and clinical application of this approach is stuck by the requirement of special skills and equipment needed for the intracellular delivery of antibodies. Hereby, an antibody conjugated polymer nanogel system, Nano-ERASER, for intracellular delivery and release of antibody, and degradation of a specific endogenous protein has been developed. After being delivered into cells, the antibody is released and forms complex with its target protein, and subsequently binds to the Fc receptor of TRIM21. The resulted complex of target protein/antibody/TRIM21 is then degraded by the proteasome. The efficacy of Nano-ERASER has been validated by depleting GFP protein in a GFP expressing cell line. Furthermore, Nano-ERASER successfully degrades COPZ1, a vital protein for cancer cells, and kills those cells while sparing normal cells. Benefit from its convenience and targeted delivery merit, Nano-ERASER technique is promising in providing a reliable tool for endogenous protein function study as well as paves the way for novel antibody-based Trim-Away therapeutic modalities for cancer and other diseases.
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Affiliation(s)
- Binglin Sui
- Department of Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, 715 Sumter, Columbia, SC 29208 (USA)
| | - Mingming Wang
- Department of Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, 715 Sumter, Columbia, SC 29208 (USA)
| | - Chen Cheng
- Department of Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, 715 Sumter, Columbia, SC 29208 (USA)
| | - Quanguang Zhang
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia at Augusta University
| | - Jiajia Zhang
- Department of Epidemiology and Biostatistics, University of South Carolina
| | - Daping Fan
- Department of Cell Biology and Anatomy, University of South Carolina
| | - Peisheng Xu
- Department of Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, 715 Sumter, Columbia, SC 29208 (USA)
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Chen L, Li Q, Jiang Z, Li C, Hu H, Wang T, Gao Y, Wang D. Chrysin Induced Cell Apoptosis Through H19/let-7a/ COPB2 Axis in Gastric Cancer Cells and Inhibited Tumor Growth. Front Oncol 2021; 11:651644. [PMID: 34150620 PMCID: PMC8209501 DOI: 10.3389/fonc.2021.651644] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 05/10/2021] [Indexed: 12/17/2022] Open
Abstract
Background Chrysin is a natural flavone that is present in honey and has exhibited anti-tumor properties. It has been widely studied as a therapeutic agent for the treatment of various types of cancers. The objectives of this present study were to elucidate how chrysin regulates non-coding RNA expression to exert anti-tumor effects in gastric cancer cells. Methods Through the use of RNA sequencing, we investigated the differential expression of mRNAs in gastric cancer cells treated with chrysin. Furthermore, COPB2, H19 and let-7a overexpression and knockdown were conducted. Other features, including cell growth, apoptosis, migration and invasion, were also analyzed. Knockout of the COPB2 gene was generated using the CRISPR/Cas9 system for tumor growth analysis in vivo. Results Our results identified COPB2 as a differentially expressed mRNA that is down-regulated following treatment with chrysin. Moreover, the results showed that chrysin can induce cellular apoptosis and inhibit cell migration and invasion. To further determine the underlying mechanism of COPB2 expression, we investigated the expression of the long non-coding RNA (lncRNA) H19 and microRNA let-7a. Our results showed that treatment with chrysin significantly increased let-7a expression and reduced the expression of H19 and COPB2. In addition, our results demonstrated that reduced expression of COPB2 markedly promotes cell apoptosis. Finally, in vivo data suggested that COPB2 expression is related to tumor growth. Conclusions This study suggests that chrysin exhibited anti-tumor effects through a H19/let-7a/COPB2 axis.
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Affiliation(s)
- Lin Chen
- Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, China
| | - Qirong Li
- Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, China
| | - Ziping Jiang
- Department of Hand Surgery, The First Hospital of Jilin University, Changchun, China
| | - Chengshun Li
- Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, China
| | - Haobo Hu
- Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, China
| | - Tiedong Wang
- Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, China
| | - Yan Gao
- Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, China
| | - Dongxu Wang
- Laboratory Animal Center, College of Animal Science, Jilin University, Changchun, China
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Fujita Y, Hoshina T, Matsuzaki J, Yoshioka Y, Kadota T, Hosaka Y, Fujimoto S, Kawamoto H, Watanabe N, Sawaki K, Sakamoto Y, Miyajima M, Lee K, Nakaharai K, Horino T, Nakagawa R, Araya J, Miyato M, Yoshida M, Kuwano K, Ochiya T. Early prediction of COVID-19 severity using extracellular vesicle COPB2. J Extracell Vesicles 2021; 10:e12092. [PMID: 34122778 PMCID: PMC8172627 DOI: 10.1002/jev2.12092] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/27/2021] [Accepted: 04/22/2021] [Indexed: 01/08/2023] Open
Abstract
The clinical manifestations of COVID-19 vary broadly, ranging from asymptomatic infection to acute respiratory failure and death. But the predictive biomarkers for characterizing the variability are still lacking. Since emerging evidence indicates that extracellular vesicles (EVs) and extracellular RNAs (exRNAs) are functionally involved in a number of pathological processes, we hypothesize that these extracellular components may be key determinants and/or predictors of COVID-19 severity. To test our hypothesis, we collected serum samples from 31 patients with mild COVID-19 symptoms at the time of their admission for discovery cohort. After symptomatic treatment without corticosteroids, 9 of the 31 patients developed severe/critical COVID-19 symptoms. We analyzed EV protein and exRNA profiles to look for correlations between these profiles and COVID-19 severity. Strikingly, we identified three distinct groups of markers (antiviral response-related EV proteins, coagulation-related markers, and liver damage-related exRNAs) with the potential to serve as early predictive biomarkers for COVID-19 severity. As the best predictive marker, EV COPB2 protein, a subunit of the Golgi coatomer complex, exhibited significantly higher abundance in patients remained mild than developed severe/critical COVID-19 and healthy controls in discovery cohort (AUC 1.00 (95% CI: 1.00-1.00)). The validation set included 40 COVID-19 patients and 39 healthy controls, and showed exactly the same trend between the three groups with excellent predictive value (AUC 0.85 (95% CI: 0.73-0.97)). These findings highlight the potential of EV COPB2 expression for patient stratification and for making early clinical decisions about strategies for COVID-19 therapy.
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Affiliation(s)
- Yu Fujita
- Department of Translational Research for Exosomes The Jikei University School of Medicine Tokyo Japan.,Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Tokio Hoshina
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | - Juntaro Matsuzaki
- Department of Molecular and Cellular Medicine Institute of Medical Science Tokyo Medical University Tokyo Japan
| | - Yusuke Yoshioka
- Department of Molecular and Cellular Medicine Institute of Medical Science Tokyo Medical University Tokyo Japan
| | - Tsukasa Kadota
- Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Yusuke Hosaka
- Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Shota Fujimoto
- Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Hironori Kawamoto
- Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Naoaki Watanabe
- Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Kenji Sawaki
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | - Yohei Sakamoto
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | - Makiko Miyajima
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | - Kwangyole Lee
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | - Kazuhiko Nakaharai
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | - Tetsuya Horino
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | | | - Jun Araya
- Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Mitsuru Miyato
- Department of Molecular and Cellular Medicine Institute of Medical Science Tokyo Medical University Tokyo Japan
| | - Masaki Yoshida
- Department of Infectious Diseases and Infection Control The Jikei University School of Medicine Tokyo Japan
| | - Kazuyoshi Kuwano
- Division of Respiratory Diseases Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
| | - Takahiro Ochiya
- Department of Molecular and Cellular Medicine Institute of Medical Science Tokyo Medical University Tokyo Japan
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Wu W, Wang C, Wang F, Wang Y, Jin Y, Luo J, Wang M, Zhang C, Wang S, Zhang F, Li M. Silencing the COPB2 gene decreases the proliferation, migration and invasion of human triple-negative breast cancer cells. Exp Ther Med 2021; 22:792. [PMID: 34093748 PMCID: PMC8170640 DOI: 10.3892/etm.2021.10224] [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: 11/11/2020] [Accepted: 04/23/2021] [Indexed: 12/27/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is highly invasive, has a high rate of recurrence and is associated with a poor clinical outcome when compared with non-TNBC due to a lack of effective and targeted treatments. The coatomer protein complex subunit β2 (COPB2) is upregulated in various types of malignant cancer. The present study demonstrated that COPB2 expression levels were significantly upregulated in breast carcinoma HS-578T cells (clonal cells originating from TNBC) when compared with non-TNBC MCF-7 cells. HS-578T cells also exhibited higher rates of proliferation, invasion and transendothelial migration when compared with MCF-7 cells. Moreover, it was identified that genetically silencing the COPB2 gene using a lentivirus-short hairpin RNA inhibited the proliferative, colony formation, migratory and invasive properties of the TNBC HS-578T cells. Mediation of the COPB2 silencing effect may be associated with regulating the phosphorylation of serine/threonine kinase AKT in the PI3K/AKT signaling pathway. These results suggested the importance of COPB2 in promoting the proliferation of TNBC cells and identified COPB2 as a potential novel therapeutic target.
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Affiliation(s)
- Wencheng Wu
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Chenyu Wang
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Fengxia Wang
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Yan Wang
- Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
| | - Yanling Jin
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Jing Luo
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Min Wang
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Chenli Zhang
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Shuya Wang
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Fangfang Zhang
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Min Li
- Department of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China.,Gansu Provincial Key Laboratory of Preclinical Study for New Drug Development, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
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40
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De Niz M, Caldelari R, Kaiser G, Zuber B, Heo WD, Heussler VT, Agop-Nersesian C. Hijacking of the host cell Golgi by Plasmodium berghei liver stage parasites. J Cell Sci 2021; 134:jcs252213. [PMID: 34013963 PMCID: PMC8186485 DOI: 10.1242/jcs.252213] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 04/12/2021] [Indexed: 12/28/2022] Open
Abstract
The intracellular lifestyle represents a challenge for the rapidly proliferating liver stage Plasmodium parasite. In order to scavenge host resources, Plasmodium has evolved the ability to target and manipulate host cell organelles. Using dynamic fluorescence-based imaging, we here show an interplay between the pre-erythrocytic stages of Plasmodium berghei and the host cell Golgi during liver stage development. Liver stage schizonts fragment the host cell Golgi into miniaturized stacks, which increases surface interactions with the parasitophorous vacuolar membrane of the parasite. Expression of specific dominant-negative Arf1 and Rab GTPases, which interfere with the host cell Golgi-linked vesicular machinery, results in developmental delay and diminished survival of liver stage parasites. Moreover, functional Rab11a is critical for the ability of the parasites to induce Golgi fragmentation. Altogether, we demonstrate that the structural integrity of the host cell Golgi and Golgi-associated vesicular traffic is important for optimal pre-erythrocytic development of P. berghei. The parasite hijacks the Golgi structure of the hepatocyte to optimize its own intracellular development. This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Mariana De Niz
- Institute of Cell Biology, University of Bern, CH-3012 Bern, Switzerland
| | - Reto Caldelari
- Institute of Cell Biology, University of Bern, CH-3012 Bern, Switzerland
| | - Gesine Kaiser
- Institute of Cell Biology, University of Bern, CH-3012 Bern, Switzerland
| | - Benoit Zuber
- Institute for Anatomy, University of Bern, CH-3012 Bern, Switzerland
| | - Won Do Heo
- Dept. of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Volker T. Heussler
- Institute of Cell Biology, University of Bern, CH-3012 Bern, Switzerland
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Ma Z, Chen S, Wang Z, Liu J, Zhang B. Proteome analysis of bermudagrass stolons and rhizomes provides new insights into the adaptation of plant stems to aboveground and underground growth. J Proteomics 2021; 241:104245. [PMID: 33901681 DOI: 10.1016/j.jprot.2021.104245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 12/16/2022]
Abstract
As an important perennial warm-season turfgrass species, bermudagrass (Cynodon dactylon L.) forms underground-growing rhizomes and aboveground-growing stolons simultaneously, making it a fast propagating clonal plant with strong regeneration ability. In the current study, we compared the internode proteomes of rhizomes and stolons at the same developmental stage in the bermudagrass cultivar Yangjiang using iTRAQ. The results indicated that 228 protein species were differentially accumulated in the two specialized stems. In agreement with the different contents of starch, chlorophyll, anthocyanin and H2O2 in the two types of stems, photosynthesis and flavonoid biosynthesis were enriched with differentially accumulated protein species (DAPs) in stolons, whereas starch and sucrose metabolism, glycolysis, and H2O2 metabolism were enriched with DAPs in rhizomes. Burying stolons in the soil resulted in the gradual degradation of chlorophyll and anthocyanin, accumulation of starch, and increment of H2O2, which is similar to the physiological characteristics of rhizomes. These results collectively revealed that stolons and rhizomes of bermudagrass have significant differences at the proteome level and light might play important regulatory roles in the discrepancy of the proteome profiles and specialization of the two stems, providing new insights into the adaptation of plant stems to aboveground and underground growth. BIOLOGICAL SIGNIFICANCE: As two types of specialized stems that grow underground and aboveground respectively, rhizomes and stolons play important roles in overwintering and ecological invasion of many perennial and clonal plants. However, because rhizomes and stolons rarely coexist in single plant species, the differences between the two stems remain unclear at the molecular level. In this study, through an iTRAQ comparative proteomic analysis, we reported the identification of 228 differentially accumulated protein species (DAPs) in rhizomes and stolons of bermudagrass for the first time. We found that the 228 DAPs were interconnected to form protein networks in regulating diverse cellular activities and biochemical reactions. We also observed that stolons growing underground showed similar physiological activities and DAP expression as those of underground-growing rhizomes, suggesting that light might play important regulatory roles in the specialization of stolons and rhizomes. These results expanded our understanding of the mysterious adaption of plant stems to different growth conditions.
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Affiliation(s)
- Ziyan Ma
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Si Chen
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Zhizhi Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Jianxiu Liu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Bing Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
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RNAi efficacy is enhanced by chronic dsRNA feeding in pollen beetle. Commun Biol 2021; 4:444. [PMID: 33824392 PMCID: PMC8024372 DOI: 10.1038/s42003-021-01975-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 03/10/2021] [Indexed: 01/02/2023] Open
Abstract
Double-stranded RNAs (dsRNAs) represent a promising class of biosafe insecticidal compounds. We examined the ability to induce RNA interference (RNAi) in the pollen beetle Brassicogethes aeneus via anther feeding, and compared short-term (3 d) to chronic (17 d) feeding of various concentrations of dsRNA targeting αCOP (dsαCOP). In short-term dsαCOP feeding, only the highest concentration resulted in significant reductions in B. aeneus survival; whereas in chronic dsαCOP feeding, all three concentrations resulted in significant mortality. Chronic dsαCOP feeding also resulted in significantly greater mortality compared to short-term feeding of equivalent dsαCOP concentrations. Our results have implications for the economics and development of dsRNA spray approaches for managing crop pests, in that multiple lower-concentration dsRNA spray treatments across crop growth stages may result in greater pest management efficacy, compared to single treatments using higher dsRNA concentrations. Furthermore, our results highlight the need for research into the development of RNAi cultivars for oilseed rape protection, given the enhanced RNAi efficacy resulting from chronic, compared to short-term, dsRNA feeding in B. aeneus. Jonathan Willow et al. use dsαCOP-treated anthers to examine RNAi efficacy against pollen beetle, a major pest of oilseed rape. The authors found that chronic feeding resulted in significantly greater mortality compared to short-term feeding; and significant silencing of αCOP was detected only in beetles chronically exposed to dsαCOP.
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Tang BL. Defects in early secretory pathway transport machinery components and neurodevelopmental disorders. Rev Neurosci 2021; 32:851-869. [PMID: 33781010 DOI: 10.1515/revneuro-2021-0020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 03/12/2021] [Indexed: 12/23/2022]
Abstract
The early secretory pathway, provisionally comprising of vesicular traffic between the endoplasmic reticulum (ER) and the Golgi apparatus, occurs constitutively in mammalian cells. Critical for a constant supply of secretory and plasma membrane (PM) materials, the pathway is presumably essential for general cellular function and survival. Neurons exhibit a high intensity in membrane dynamics and protein/lipid trafficking, with differential and polarized trafficking towards the somatodendritic and axonal PM domains. Mutations in genes encoding early secretory pathway membrane trafficking machinery components are known to result in neurodevelopmental or neurological disorders with disease manifestation in early life. Here, such rare disorders associated with autosomal recessive mutations in coat proteins, membrane tethering complexes and membrane fusion machineries responsible for trafficking in the early secretory pathway are summarily discussed. These mutations affected genes encoding subunits of coat protein complex I and II, subunits of transport protein particle (TRAPP) complexes, members of the YIP1 domain family (YIPF) and a SNAP receptor (SNARE) family member. Why the ubiquitously present and constitutively acting early secretory pathway machinery components could specifically affect neurodevelopment is addressed, with the plausible underlying disease etiologies and neuropathological mechanisms resulting from these mutations explored.
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Affiliation(s)
- Bor Luen Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore117597, Singapore
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Haeussler S, Yeroslaviz A, Rolland SG, Luehr S, Lambie EJ, Conradt B. Genome-wide RNAi screen for regulators of UPRmt in Caenorhabditis elegans mutants with defects in mitochondrial fusion. G3-GENES GENOMES GENETICS 2021; 11:6204483. [PMID: 33784383 PMCID: PMC8495942 DOI: 10.1093/g3journal/jkab095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 03/18/2021] [Indexed: 01/22/2023]
Abstract
Mitochondrial dynamics plays an important role in mitochondrial quality control and the adaptation of metabolic activity in response to environmental changes. The disruption of mitochondrial dynamics has detrimental consequences for mitochondrial and cellular homeostasis and leads to the activation of the mitochondrial unfolded protein response (UPRmt), a quality control mechanism that adjusts cellular metabolism and restores homeostasis. To identify genes involved in the induction of UPRmt in response to a block in mitochondrial fusion, we performed a genome-wide RNAi screen in Caenorhabditis elegans mutants lacking the gene fzo-1, which encodes the ortholog of mammalian Mitofusin, and identified 299 suppressors and 86 enhancers. Approximately 90% of these 385 genes are conserved in humans, and one third of the conserved genes have been implicated in human disease. Furthermore, many have roles in developmental processes, which suggests that mitochondrial function and the response to stress are defined during development and maintained throughout life. Our dataset primarily contains mitochondrial enhancers and non-mitochondrial suppressors of UPRmt, indicating that the maintenance of mitochondrial homeostasis has evolved as a critical cellular function, which, when disrupted, can be compensated for by many different cellular processes. Analysis of the subsets 'non-mitochondrial enhancers' and 'mitochondrial suppressors' suggests that organellar contact sites, especially between the ER and mitochondria, are of importance for mitochondrial homeostasis. In addition, we identified several genes involved in IP3 signaling that modulate UPRmt in fzo-1 mutants and found a potential link between pre-mRNA splicing and UPRmt activation.
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Affiliation(s)
- Simon Haeussler
- Faculty of Biology, Ludwig-Maximilians-University Munich, 82152 Planegg-Martinsried, Germany
| | - Assa Yeroslaviz
- Computational Biology Group, Max Planck Institute of Biochemistry, 82152 Planegg-Martinsried, Germany
| | - Stéphane G Rolland
- Faculty of Biology, Ludwig-Maximilians-University Munich, 82152 Planegg-Martinsried, Germany.,Center for Genomic Integrity, Institute for Basic Science (IBS), Ulsan 44919, South Korea
| | - Sebastian Luehr
- Faculty of Biology, Ludwig-Maximilians-University Munich, 82152 Planegg-Martinsried, Germany
| | - Eric J Lambie
- Center for Integrated Protein Science, Ludwig-Maximilians-University Munich, 82152 Planegg-Martinsried, Germany
| | - Barbara Conradt
- Faculty of Biology, Ludwig-Maximilians-University Munich, 82152 Planegg-Martinsried, Germany.,Center for Integrated Protein Science, Ludwig-Maximilians-University Munich, 82152 Planegg-Martinsried, Germany.,Research Department of Cell and Developmental Biology, Division of Biosciences, University College London, London WC1E 6AP, United Kingdom
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COPB2: A Novel Prognostic Biomarker That Affects Progression of HCC. BIOMED RESEARCH INTERNATIONAL 2021; 2021:6648078. [PMID: 33824874 PMCID: PMC8007342 DOI: 10.1155/2021/6648078] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/04/2021] [Accepted: 03/06/2021] [Indexed: 12/12/2022]
Abstract
Purpose This study is aimed at investigating the expression, underlying biological function, and clinical significance of coatomer protein complex subunit beta 2 (COPB2) in hepatocellular carcinoma (HCC). Methods HCC-related data were extracted from The Cancer Genome Atlas (TCGA) database, International Cancer Genome Consortium (ICGC) database, and Gene Expression Omnibus (GEO) database. A logistic regression module was applied to analyze the relationship between the expression of COPB2 and clinicopathologic characteristics. The Cox proportional hazard regression model and Kaplan–Meier method were used for survival analysis. Gene set enrichment analysis (GSEA) was used to annotate the underlying biological functions. Loss-of-function experiments were conducted to determine the underlying mechanisms. Results COPB2 was overexpressed in HCC, and high expression of COPB2 was significantly correlated with higher alpha fetoprotein (AFP) (odds ratio (OR) = 1.616, >20 vs. ≤20, p < 0.05), stage (OR = 1.744, III vs. I, p < 0.05), and grade (OR = 1.746, G4+G3 vs. G2+G1, p < 0.05). Kaplan–Meier survival analysis showed that HCC patients with high COPB2 expression had a worse prognosis than those with low COPB2 expression (p < 0.0001 for TCGA cohort, p < 0.05 for ICGC cohort). The univariate Cox (hazard ratio (HR) = 1.068, p < 0.0001) and multivariate Cox (HR = 2.011, p < 0.05) regression analyses suggested that COPB2 was an independent risk factor. GSEA showed that mTOR and other tumor-related signaling pathways were differentially enriched in the high COPB2 expression phenotype. Silencing of COPB2 inhibited the proliferation, migration, and invasion abilities by suppressing epithelial-mesenchymal transition and mTOR signaling. Conclusion COPB2 is a novel prognostic biomarker and a promising therapeutic target for HCC.
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Auclair N, Sané AT, Delvin E, Spahis S, Levy E. Phospholipase D as a Potential Modulator of Metabolic Syndrome: Impact of Functional Foods. Antioxid Redox Signal 2021; 34:252-278. [PMID: 32586106 DOI: 10.1089/ars.2020.8081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Significance: Cardiometabolic disorders (CMD) are composed of a plethora of metabolic dysfunctions such as dyslipidemia, nonalcoholic fatty liver disease, insulin resistance, and hypertension. The development of these disorders is highly linked to inflammation and oxidative stress (OxS), two metabolic states closely related to physiological and pathological conditions. Given the drastically rising CMD prevalence, the discovery of new therapeutic targets/novel nutritional approaches is of utmost importance. Recent Advances: The tremendous progress in methods/technologies and animal modeling has allowed the clarification of phospholipase D (PLD) critical roles in multiple cellular processes, whether directly or indirectly via phosphatidic acid, the lipid product mediating signaling functions. In view of its multiple features and implications in various diseases, PLD has emerged as a drug target. Critical Issues: Although insulin stimulates PLD activity and, in turn, PLD regulates insulin signaling, the impact of the two important PLD isoforms on the metabolic syndrome components remains vague. Therefore, after outlining PLD1/PLD2 characteristics and functions, their role in inflammation, OxS, and CMD has been analyzed and critically reported in the present exhaustive review. The influence of functional foods and nutrients in the regulation of PLD has also been examined. Future Directions: Available evidence supports the implication of PLD in CMD, but only few studies emphasize its mechanisms of action and specific regulation by nutraceutical compounds. Therefore, additional investigations are first needed to clarify the functional role of nutraceutics and, second, to elucidate whether targeting PLDs with food compounds represents an appropriate therapeutic strategy to treat CMD. Antioxid. Redox Signal. 34, 252-278.
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Affiliation(s)
- Nickolas Auclair
- Research Center, CHU Sainte-Justine, Université de Montréal, Montreal, Quebec, Canada.,Department of Pharmacology & Physiology and Université de Montréal, Montreal, Quebec, Canada
| | - Alain T Sané
- Research Center, CHU Sainte-Justine, Université de Montréal, Montreal, Quebec, Canada
| | - Edgard Delvin
- Research Center, CHU Sainte-Justine, Université de Montréal, Montreal, Quebec, Canada
| | - Schohraya Spahis
- Research Center, CHU Sainte-Justine, Université de Montréal, Montreal, Quebec, Canada.,Department of Nutrition, Université de Montréal, Montreal, Quebec, Canada
| | - Emile Levy
- Research Center, CHU Sainte-Justine, Université de Montréal, Montreal, Quebec, Canada.,Department of Pharmacology & Physiology and Université de Montréal, Montreal, Quebec, Canada.,Department of Nutrition, Université de Montréal, Montreal, Quebec, Canada
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47
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Astroski JW, Akporyoe LK, Androphy EJ, Custer SK. Mutations in the COPI coatomer subunit α-COP induce release of Aβ-42 and amyloid precursor protein intracellular domain and increase tau oligomerization and release. Neurobiol Aging 2021; 101:57-69. [PMID: 33582567 DOI: 10.1016/j.neurobiolaging.2021.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 12/02/2020] [Accepted: 01/06/2021] [Indexed: 12/14/2022]
Abstract
Understanding the cellular processes that lead to Alzheimer's disease (AD) is critical, and one key lies in the genetics of families with histories of AD. Mutations a complex known as COPI were found in families with AD. The COPI complex is involved in protein processing and trafficking. Intriguingly, several recent publications have found components of the COPI complex can affect the metabolism of pathogenic AD proteins. We reduced levels of the COPI subunit α-COP, altering maturation and cleavage of amyloid precursor protein (APP), resulting in decreased release of Aβ-42 and decreased accumulation of the AICD. Depletion of α-COP reduced uptake of proteopathic Tau seeds and reduces intracellular Tau self-association. Expression of AD-associated mutant α-COP altered APP processing, resulting in increased release of Aβ-42 and increased intracellular Tau aggregation and release of Tau oligomers. These results show that COPI coatomer function modulates processing of both APP and Tau, and expression of AD-associated α-COP confers a toxic gain of function, resulting in potentially pathogenic changes in both APP and Tau.
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Affiliation(s)
- Jacob W Astroski
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Elliot J Androphy
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Sara K Custer
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN, USA.
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48
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Zhang Y, Kong Y, Ma Y, Ni S, Wikerholmen T, Xi K, Zhao F, Zhao Z, Wang J, Huang B, Chen A, Yao Z, Han M, Feng Z, Hu Y, Thorsen F, Wang J, Li X. Loss of COPZ1 induces NCOA4 mediated autophagy and ferroptosis in glioblastoma cell lines. Oncogene 2021; 40:1425-1439. [PMID: 33420375 PMCID: PMC7906905 DOI: 10.1038/s41388-020-01622-3] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 11/25/2020] [Accepted: 12/11/2020] [Indexed: 01/29/2023]
Abstract
Dysregulated iron metabolism is a hallmark of many cancers, including glioblastoma (GBM). However, its role in tumor progression remains unclear. Herein, we identified coatomer protein complex subunit zeta 1 (COPZ1) as a therapeutic target candidate which significantly dysregulated iron metabolism in GBM cells. Overexpression of COPZ1 was associated with increasing tumor grade and poor prognosis in glioma patients based on analysis of expression data from the publicly available database The Cancer Genome Atlas (P < 0.001). Protein levels of COPZ1 were significantly increased in GBM compared to non-neoplastic brain tissue samples in immunohistochemistry and western blot analysis. SiRNA knockdown of COPZ1 suppressed proliferation of U87MG, U251 and P3#GBM in vitro. Stable expression of a COPZ1 shRNA construct in U87MG inhibited tumor growth in vivo by ~60% relative to controls at day 21 after implantation (P < 0.001). Kaplan-Meier analysis of the survival data demonstrated that the overall survival of tumor bearing animals increased from 20.8 days (control) to 27.8 days (knockdown, P < 0.05). COPZ1 knockdown also led to the increase in nuclear receptor coactivator 4 (NCOA4), resulting in the degradation of ferritin, and a subsequent increase in the intracellular levels of ferrous iron and ultimately ferroptosis. These data demonstrate that COPZ1 is a critical mediator in iron metabolism. The COPZ1/NCOA4/FTH1 axis is therefore a novel therapeutic target for the treatment of human GBM.
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Affiliation(s)
- Yulin Zhang
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,grid.7914.b0000 0004 1936 7443Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway
| | - Yang Kong
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,grid.7914.b0000 0004 1936 7443Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway
| | - Yuan Ma
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Shilei Ni
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Tobias Wikerholmen
- grid.7914.b0000 0004 1936 7443Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway
| | - Kaiyan Xi
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Feihu Zhao
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Zhimin Zhao
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Junpeng Wang
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Bin Huang
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Anjing Chen
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Zhong Yao
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Mingzhi Han
- grid.7914.b0000 0004 1936 7443Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway
| | - Zichao Feng
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Yaotian Hu
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
| | - Frits Thorsen
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,grid.7914.b0000 0004 1936 7443Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway ,grid.7914.b0000 0004 1936 7443Molecular Imaging Center, Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway
| | - Jian Wang
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,grid.7914.b0000 0004 1936 7443Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway
| | - Xingang Li
- grid.27255.370000 0004 1761 1174Department of Neurosurgery, Qilu Hospital and Institute of Brain and Brain-Inspired Science, Cheeloo College of Medicine, Shandong University, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China ,Shandong Key Laboratory of Brain Function Remodeling, Shandong 107 Wenhua Xi Road, Jinan, 250012 P.R. China
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The Close Relationship between the Golgi Trafficking Machinery and Protein Glycosylation. Cells 2020; 9:cells9122652. [PMID: 33321764 PMCID: PMC7764369 DOI: 10.3390/cells9122652] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 12/12/2022] Open
Abstract
Glycosylation is the most common post-translational modification of proteins; it mediates their correct folding and stability, as well as their transport through the secretory transport. Changes in N- and O-linked glycans have been associated with multiple pathological conditions including congenital disorders of glycosylation, inflammatory diseases and cancer. Glycoprotein glycosylation at the Golgi involves the coordinated action of hundreds of glycosyltransferases and glycosidases, which are maintained at the correct location through retrograde vesicle trafficking between Golgi cisternae. In this review, we describe the molecular machinery involved in vesicle trafficking and tethering at the Golgi apparatus and the effects of mutations in the context of glycan biosynthesis and human diseases.
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50
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Abu Irqeba A, Ogilvie JM. Di-arginine and FFAT-like motifs retain a subpopulation of PRA1 at ER-mitochondria membrane contact sites. PLoS One 2020; 15:e0243075. [PMID: 33259547 PMCID: PMC7707580 DOI: 10.1371/journal.pone.0243075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 11/14/2020] [Indexed: 11/19/2022] Open
Abstract
Prenylated Rab Acceptor 1 (PRA1/Rabac1) is a four-pass transmembrane protein that has been found to localize to the Golgi and promiscuously associate with a diverse array of Rab GTPases. We have previously identified PRA1 to be among the earliest significantly down-regulated genes in the rd1 mouse model of retinitis pigmentosa, a retinal degenerative disease. Here, we show that an endogenous subpopulation of PRA1 resides within the endoplasmic reticulum (ER) at ER-mitochondria membrane contact sites in cultured mammalian cells. We also demonstrate that PRA1 contains two previously unidentified ER retention/retrieval amino acid sequences on its cytosolic N-terminal region: a membrane distal di-arginine motif and a novel membrane proximal FFAT-like motif. Using a truncation construct that lacks complete Golgi targeting information, we show that mutation of either motif leads to an increase in cell surface localization, while mutation of both motifs exhibits an additive effect. We also present evidence that illustrates that N- or C- terminal addition of a tag to full-length PRA1 leads to differential localization to either the Golgi or reticular ER, phenotypes that do not completely mirror endogenous protein localization. The presence of multiple ER retention motifs on the PRA1 N-terminal region further suggests that it has a functional role within the ER.
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Affiliation(s)
- Ameair Abu Irqeba
- Department of Biology, Saint Louis University, St. Louis, Missouri, United States of America
- * E-mail: (AAI); (JMO)
| | - Judith Mosinger Ogilvie
- Department of Biology, Saint Louis University, St. Louis, Missouri, United States of America
- * E-mail: (AAI); (JMO)
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