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Levy E, Fallet-Bianco C, Auclair N, Patey N, Marcil V, Sané AT, Spahis S. Unraveling Chylomicron Retention Disease Enhances Insight into SAR1B GTPase Functions and Mechanisms of Actions, While Shedding Light of Intracellular Chylomicron Trafficking. Biomedicines 2024; 12:1548. [PMID: 39062121 PMCID: PMC11274388 DOI: 10.3390/biomedicines12071548] [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: 05/22/2024] [Revised: 06/28/2024] [Accepted: 07/08/2024] [Indexed: 07/28/2024] Open
Abstract
Over the past three decades, significant efforts have been focused on unraveling congenital intestinal disorders that disrupt the absorption of dietary lipids and fat-soluble vitamins. The primary goal has been to gain deeper insights into intra-enterocyte sites, molecular steps, and crucial proteins/regulatory pathways involved, while simultaneously identifying novel therapeutic targets and diagnostic tools. This research not only delves into specific and rare malabsorptive conditions, such as chylomicron retention disease (CRD), but also contributes to our understanding of normal physiology through the utilization of cutting-edge cellular and animal models alongside advanced research methodologies. This review elucidates how modern techniques have facilitated the decoding of CRD gene defects, the identification of dysfunctional cellular processes, disease regulatory mechanisms, and the essential role of coat protein complex II-coated vesicles and cargo receptors in chylomicron trafficking and endoplasmic reticulum (ER) exit sites. Moreover, experimental approaches have shed light on the multifaceted functions of SAR1B GTPase, wherein loss-of-function mutations not only predispose individuals to CRD but also exacerbate oxidative stress, inflammation, and ER stress, potentially contributing to clinical complications associated with CRD. In addition to dissecting the primary disease pathology, genetically modified animal models have emerged as invaluable assets in exploring various ancillary aspects, including responses to environmental challenges such as dietary alterations, gender-specific disparities in disease onset and progression, and embryonic lethality or developmental abnormalities. In summary, this comprehensive review provides an in-depth and contemporary analysis of CRD, offering a meticulous examination of the CRD current landscape by synthesizing the latest research findings and advancements in the field.
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Affiliation(s)
- Emile Levy
- Azrieli Research Center, CHU Ste-Justine and Department of Nutrition, Université de Montréal, Montreal, QC H3T 1C5, Canada
| | - Catherine Fallet-Bianco
- Azrieli Research Center, CHU Ste-Justine and Pathology & Cell Biology, Université de Montréal, Montreal, QC H3T 1C5, Canada
| | - Nickolas Auclair
- Azrieli Research Center, CHU Ste-Justine and Pharmacology, Université de Montréal, Montreal, QC H3T 1C5, Canada
| | - Natalie Patey
- Azrieli Research Center, CHU Ste-Justine and Pathology & Cell Biology, Université de Montréal, Montreal, QC H3T 1C5, Canada
| | - Valérie Marcil
- Azrieli Research Center, CHU Ste-Justine and Department of Nutrition, Université de Montréal, Montreal, QC H3T 1C5, Canada
| | | | - Schohraya Spahis
- Azrieli Research Center, CHU Ste-Justine and Biochemistry & Molecular Medicine, Université de Montréal, Montreal, QC H3T 1C5, Canada;
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2
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Rezigue H, Chamouni P, Fretigny M, Barbay V, Le Cam-Duchez V, Bobee V, Lanne S, Dumesnil C, Vinciguerra C, Schneider P, Jourdy Y. Heterozygous large deletion mimicking homozygous substitution in MCFD2 in a patient with combined Factor V and Factor VIII deficiency. Haemophilia 2024; 30:1089-1091. [PMID: 38764219 DOI: 10.1111/hae.15038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 05/07/2024] [Accepted: 05/13/2024] [Indexed: 05/21/2024]
Affiliation(s)
- Hamdi Rezigue
- Service d'hématologie biologique, Hospices Civils de Lyon, Groupe Hospitalier Est, Bron, France
- Université Claude Bernard Lyon 1, UR4609 Hémostase et thrombose, Lyon, France
| | - Pierre Chamouni
- Université Claude Bernard Lyon 1, UR4609 Hémostase et thrombose, Lyon, France
| | - Mathilde Fretigny
- Service d'hématologie biologique, Hospices Civils de Lyon, Groupe Hospitalier Est, Bron, France
| | - Virginie Barbay
- CHU de Rouen, Hôpital Charles-Nicolle, Centre de ressources et de compétences - Maladies hémorragiques constitutionnelles, Rouen, France
- Service d'hématologie biologique, CHU de Rouen, Hôpital Charles Nicolle, Rouen, France
| | - Véronique Le Cam-Duchez
- CHU de Rouen, Hôpital Charles-Nicolle, Centre de ressources et de compétences - Maladies hémorragiques constitutionnelles, Rouen, France
- Service d'hématologie biologique, CHU de Rouen, Hôpital Charles Nicolle, Rouen, France
| | - Victor Bobee
- Service d'hématologie biologique, CHU de Rouen, Hôpital Charles Nicolle, Rouen, France
| | - Simon Lanne
- Laboratoire Defrance, Le Petit Quevilly, France
| | | | - Christine Vinciguerra
- Service d'hématologie biologique, Hospices Civils de Lyon, Groupe Hospitalier Est, Bron, France
- Université Claude Bernard Lyon 1, UR4609 Hémostase et thrombose, Lyon, France
| | - Pascale Schneider
- Service d'immuno-hémato-oncologie pédiatrique, CHU de Rouen, Hôpital Charles-Nicolle, Rouen, France
| | - Yohann Jourdy
- Service d'hématologie biologique, Hospices Civils de Lyon, Groupe Hospitalier Est, Bron, France
- Université Claude Bernard Lyon 1, UR4609 Hémostase et thrombose, Lyon, France
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3
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Brockmöller S, Worek F, Rothmiller S. Protein networking: nicotinic acetylcholine receptors and their protein-protein-associations. Mol Cell Biochem 2024; 479:1627-1642. [PMID: 38771378 DOI: 10.1007/s11010-024-05032-x] [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: 01/22/2024] [Accepted: 05/04/2024] [Indexed: 05/22/2024]
Abstract
Nicotinic acetylcholine receptors (nAChR) are complex transmembrane proteins involved in neurotransmission in the nervous system and at the neuromuscular junction. nAChR disorders may lead to severe, potentially fatal pathophysiological states. To date, the receptor has been the focus of basic and applied research to provide novel therapeutic interventions. Since most studies have investigated only the nAChR itself, it is necessary to consider the receptor as part of its protein network to understand or elucidate-specific pathways. On its way through the secretory pathway, the receptor interacts with several chaperones and proteins. This review takes a closer look at these molecular interactions and focuses especially on endoplasmic reticulum biogenesis, secretory pathway sorting, Golgi maturation, plasma membrane presentation, retrograde internalization, and recycling. Additional knowledge regarding the nAChR protein network may lead to a more detailed comprehension of the fundamental pathomechanisms of diseases or may lead to the discovery of novel therapeutic drug targets.
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Affiliation(s)
- Sabrina Brockmöller
- Bundeswehr Institute of Pharmacology and Toxicology, Munich, Bavaria, Germany.
| | - Franz Worek
- Bundeswehr Institute of Pharmacology and Toxicology, Munich, Bavaria, Germany
| | - Simone Rothmiller
- Bundeswehr Institute of Pharmacology and Toxicology, Munich, Bavaria, Germany
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4
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Tang VT, Xiang J, Chen Z, McCormick J, Abbineni PS, Chen XW, Hoenerhoff M, Emmer BT, Khoriaty R, Lin JD, Ginsburg D. Functional overlap between the mammalian Sar1a and Sar1b paralogs in vivo. Proc Natl Acad Sci U S A 2024; 121:e2322164121. [PMID: 38687799 PMCID: PMC11087783 DOI: 10.1073/pnas.2322164121] [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: 03/29/2024] [Indexed: 05/02/2024] Open
Abstract
Proteins carrying a signal peptide and/or a transmembrane domain enter the intracellular secretory pathway at the endoplasmic reticulum (ER) and are transported to the Golgi apparatus via COPII vesicles or tubules. SAR1 initiates COPII coat assembly by recruiting other coat proteins to the ER membrane. Mammalian genomes encode two SAR1 paralogs, SAR1A and SAR1B. While these paralogs exhibit ~90% amino acid sequence identity, it is unknown whether they perform distinct or overlapping functions in vivo. We now report that genetic inactivation of Sar1a in mice results in lethality during midembryogenesis. We also confirm previous reports that complete deficiency of murine Sar1b results in perinatal lethality. In contrast, we demonstrate that deletion of Sar1b restricted to hepatocytes is compatible with survival, though resulting in hypocholesterolemia that can be rescued by adenovirus-mediated overexpression of either SAR1A or SAR1B. To further examine the in vivo function of these two paralogs, we genetically engineered mice with the Sar1a coding sequence replacing that of Sar1b at the endogenous Sar1b locus. Mice homozygous for this allele survive to adulthood and are phenotypically normal, demonstrating complete or near-complete overlap in function between the two SAR1 protein paralogs in mice. These data also suggest upregulation of SAR1A gene expression as a potential approach for the treatment of SAR1B deficiency (chylomicron retention disease) in humans.
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Affiliation(s)
- Vi T. Tang
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI48109
- Life Sciences Institute, University of Michigan, Ann Arbor, MI48109
| | - Jie Xiang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI48109
| | - Zhimin Chen
- Life Sciences Institute, University of Michigan, Ann Arbor, MI48109
| | - Joseph McCormick
- Life Sciences Institute, University of Michigan, Ann Arbor, MI48109
| | - Prabhodh S. Abbineni
- Life Sciences Institute, University of Michigan, Ann Arbor, MI48109
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, IL60153
| | - Xiao-Wei Chen
- State Key Laboratory of Membrane Biology, Peking University, Beijing100871, China
| | - Mark Hoenerhoff
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI48109
| | - Brian T. Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI48109
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI48109
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI48109
| | - Jiandie D. Lin
- Department of Human Genetics, University of Michigan, Ann Arbor, MI48109
| | - David Ginsburg
- Life Sciences Institute, University of Michigan, Ann Arbor, MI48109
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI48109
- Department of Human Genetics, University of Michigan, Ann Arbor, MI48109
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI48109
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5
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Tang VT, Xiang J, Chen Z, McCormick J, Abbineni PS, Chen XW, Hoenerhoff M, Emmer BT, Khoriaty R, Lin JD, Ginsburg D. Functional overlap between the mammalian Sar1a and Sar1b paralogs in vivo. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.27.582310. [PMID: 38463989 PMCID: PMC10925261 DOI: 10.1101/2024.02.27.582310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Proteins carrying a signal peptide and/or a transmembrane domain enter the intracellular secretory pathway at the endoplasmic reticulum (ER) and are transported to the Golgi apparatus via COPII vesicles or tubules. SAR1 initiates COPII coat assembly by recruiting other coat proteins to the ER membrane. Mammalian genomes encode two SAR1 paralogs, SAR1A and SAR1B. While these paralogs exhibit ~90% amino acid sequence identity, it is unknown whether they perform distinct or overlapping functions in vivo. We now report that genetic inactivation of Sar1a in mice results in lethality during mid-embryogenesis. We also confirm previous reports that complete deficiency of murine Sar1b results in perinatal lethality. In contrast, we demonstrate that deletion of Sar1b restricted to hepatocytes is compatible with survival, though resulting in hypocholesterolemia that can be rescued by adenovirus-mediated overexpression of either SAR1A or SAR1B. To further examine the in vivo function of these 2 paralogs, we genetically engineered mice with the Sar1a coding sequence replacing that of Sar1b at the endogenous Sar1b locus. Mice homozygous for this allele survive to adulthood and are phenotypically normal, demonstrating complete or near-complete overlap in function between the two SAR1 protein paralogs in mice. These data also suggest upregulation of SAR1A gene expression as a potential approach for the treatment of SAR1B deficiency (chylomicron retention disease) in humans.
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Affiliation(s)
- Vi T. Tang
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Jie Xiang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Zhimin Chen
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Joseph McCormick
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Prabhodh S. Abbineni
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, IL 60153
| | - Xiao-Wei Chen
- State Key Laboratory of Membrane Biology, Peking University, Beijing 100871, China
| | - Mark Hoenerhoff
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Brian T. Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Jiandie D. Lin
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109
| | - David Ginsburg
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI 48109
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6
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Shaw JL, Pablo JL, Greka A. Mechanisms of Protein Trafficking and Quality Control in the Kidney and Beyond. Annu Rev Physiol 2023; 85:407-423. [PMID: 36763970 DOI: 10.1146/annurev-physiol-031522-100639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Numerous trafficking and quality control pathways evolved to handle the diversity of proteins made by eukaryotic cells. However, at every step along the biosynthetic pathway, there is the potential for quality control system failure. This review focuses on the mechanisms of disrupted proteostasis. Inspired by diseases caused by misfolded proteins in the kidney (mucin 1 and uromodulin), we outline the general principles of protein biosynthesis, delineate the recognition and degradation pathways targeting misfolded proteins, and discuss the role of cargo receptors in protein trafficking and lipid homeostasis. We also discuss technical approaches including live-cell fluorescent microscopy, chemical screens to elucidate trafficking mechanisms, multiplexed single-cell CRISPR screening platforms to systematically delineate mechanisms of proteostasis, and the advancement of novel tools to degrade secretory and membrane-associated proteins. By focusing on components of trafficking that go awry, we highlight ongoing efforts to understand fundamental mechanisms of disrupted proteostasis and implications for the treatment of human proteinopathies.
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Affiliation(s)
- Jillian L Shaw
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA; .,Kidney Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Juan Lorenzo Pablo
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA; .,Kidney Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Anna Greka
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA; .,Kidney Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA.,Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
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7
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Tang VT, Ginsburg D. Cargo selection in endoplasmic reticulum-to-Golgi transport and relevant diseases. J Clin Invest 2023; 133:163838. [PMID: 36594468 PMCID: PMC9797344 DOI: 10.1172/jci163838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Most proteins destined for the extracellular space or various intracellular compartments must traverse the intracellular secretory pathway. The first step is the recruitment and transport of cargoes from the endoplasmic reticulum (ER) lumen to the Golgi apparatus by coat protein complex II (COPII), consisting of five core proteins. Additional ER transmembrane proteins that aid cargo recruitment are referred to as cargo receptors. Gene duplication events have resulted in multiple COPII paralogs present in the mammalian genome. Here, we review the functions of each COPII protein, human disorders associated with each paralog, and evidence for functional conservation between paralogs. We also provide a summary of current knowledge regarding two prototypical cargo receptors in mammals, LMAN1 and SURF4, and their roles in human health and disease.
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Affiliation(s)
- Vi T. Tang
- Department of Molecular and Integrative Physiology,,Life Sciences Institute
| | - David Ginsburg
- Life Sciences Institute,,Department of Internal Medicine,,Department of Human Genetics,,Department of Pediatrics and Communicable Diseases, and,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan, USA
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8
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Bioinformatics analysis of LMAN1 expression, clinical characteristics, and its effects on cell proliferation and invasion in glioma. Brain Res 2022; 1789:147952. [PMID: 35623391 DOI: 10.1016/j.brainres.2022.147952] [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: 03/09/2022] [Revised: 05/11/2022] [Accepted: 05/21/2022] [Indexed: 11/20/2022]
Abstract
Glioma is the most common primary central nervous system malignant tumor with high heterogeneity and poor prognosis. So far, the complex pathological process of glioma has not been fully elucidated, and there is a lack of effective biomarkers for the diagnosis and molecular targeted therapy of glioma. Using bioinformatics methods, 77 upregulated and 89 downregulated differentially expressed genes (DEGs) were detected by intersection analysis in different gene expression datasets of glioma cases from public databases. Then, GO and KEGG pathway analysis revealed that the biological functions of these upregulated DEGs were mainly focused on immune response, and the signaling pathways were mainly enriched in integrin family cell surface interactions. The overexpression of the LMAN1 gene of interest was then confirmed using the TCGA dataset and further verified by qRT-PCR in 29 clinical samples and 5 glioma cell lines. Furthermore, high expression of LMAN1 was found to be associated with higher WHO grade, IDH status, and 1p/19q co-deletion. Survival analysis showed that high expression of LMAN1 was associated with poor prognosis in glioma. Gene set enrichment analysis (GSEA) indicated that many cancer-related pathways were associated with LMAN1-high phenotype. Protein-protein interaction (PPI) analysis revealed significant interaction between LMAN1 and MCFD2, F8, and TMED10. Finally, cell experiments showed that LMAN1 knockdown significantly inhibited the proliferation, migration and invasion and promoted apoptosis in glioma cells. This study highlighted the malignant role of LMAN1 in gliomas and provided a potentially valuable biomarker for prognosis evaluation and molecular targeted therapy of glioma.
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King R, Gallagher PJ, Khoriaty R. The congenital dyserythropoieitic anemias: genetics and pathophysiology. Curr Opin Hematol 2022; 29:126-136. [PMID: 35441598 PMCID: PMC9021540 DOI: 10.1097/moh.0000000000000697] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
PURPOSE OF REVIEW The congenital dyserythropoietic anemias (CDA) are hereditary disorders characterized by ineffective erythropoiesis. This review evaluates newly developed CDA disease models, the latest advances in understanding the pathogenesis of the CDAs, and recently identified CDA genes. RECENT FINDINGS Mice exhibiting features of CDAI were recently generated, demonstrating that Codanin-1 (encoded by Cdan1) is essential for primitive erythropoiesis. Additionally, Codanin-1 was found to physically interact with CDIN1, suggesting that mutations in CDAN1 and CDIN1 result in CDAI via a common mechanism. Recent advances in CDAII (which results from SEC23B mutations) have also been made. SEC23B was found to functionally overlap with its paralogous protein, SEC23A, likely explaining the absence of CDAII in SEC23B-deficient mice. In contrast, mice with erythroid-specific deletion of 3 or 4 of the Sec23 alleles exhibited features of CDAII. Increased SEC23A expression rescued the CDAII erythroid defect, suggesting a novel therapeutic strategy for the disease. Additional recent advances included the identification of new CDA genes, RACGAP1 and VPS4A, in CDAIII and a syndromic CDA type, respectively. SUMMARY Establishing cellular and animal models of CDA is expected to result in improved understanding of the pathogenesis of these disorders, which may ultimately lead to the development of new therapies.
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Affiliation(s)
- Richard King
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| | - Patrick J. Gallagher
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan, USA
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
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10
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Wang F, Tan P, Zhang P, Ren Y, Zhou J, Li Y, Hou S, Li S, Zhang L, Ma Y, Wang C, Tang W, Wang X, Huo Y, Hu Y, Cui T, Niu C, Wang D, Liu B, Lan Y, Yu J. Single-cell architecture and functional requirement of alternative splicing during hematopoietic stem cell formation. SCIENCE ADVANCES 2022; 8:eabg5369. [PMID: 34995116 PMCID: PMC8741192 DOI: 10.1126/sciadv.abg5369] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Single-cell transcriptional profiling has rapidly advanced our understanding of the embryonic hematopoiesis; however, whether and what role RNA alternative splicing (AS) plays remains an enigma. This is important for understanding the mechanisms underlying splicing-associated hematopoietic diseases and for the derivation of therapeutic stem cells. Here, we used single-cell full-length transcriptome data to construct an isoform-based transcriptional atlas of the murine endothelial-to-hematopoietic stem cell (HSC) transition, which enables the identification of hemogenic signature isoforms and stage-specific AS events. We showed that the inclusion of these hemogenic-specific AS events was essential for hemogenic function in vitro. Expression data and knockout mouse studies highlighted the critical role of Srsf2: Early Srsf2 deficiency from endothelial cells affected the splicing pattern of several master hematopoietic regulators and significantly impaired HSC generation. These results redefine our understanding of the dynamic HSC developmental transcriptome and demonstrate that elaborately controlled RNA splicing governs cell fate in HSC formation.
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Affiliation(s)
- Fang Wang
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
- The Key Laboratory of RNA and Hematopoietic Regulation, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Puwen Tan
- Department of Bioinformatics, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Pengcheng Zhang
- State Key Laboratory of Experimental Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
- Department of Environmental Medicine, Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Yue Ren
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
- The Key Laboratory of RNA and Hematopoietic Regulation, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Jie Zhou
- State Key Laboratory of Experimental Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Yunqiao Li
- State Key Laboratory of Experimental Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Siyuan Hou
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou 510632, China
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, China
| | - Shuaili Li
- State Key Laboratory of Experimental Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Linlin Zhang
- State Key Laboratory of Experimental Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Yanni Ma
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
- The Key Laboratory of RNA and Hematopoietic Regulation, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Chaojie Wang
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou 510632, China
| | - Wanbo Tang
- State Key Laboratory of Experimental Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Xiaoshuang Wang
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
- The Key Laboratory of RNA and Hematopoietic Regulation, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Yue Huo
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
- The Key Laboratory of RNA and Hematopoietic Regulation, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Yongfei Hu
- Department of Bioinformatics, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Tianyu Cui
- Department of Bioinformatics, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Chao Niu
- Department of Environmental Medicine, Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Dong Wang
- Department of Bioinformatics, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
- Corresponding author. (D.W.); (B.L.); (Y.Lan); (J.Y.)
| | - Bing Liu
- State Key Laboratory of Experimental Hematology, Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
- Corresponding author. (D.W.); (B.L.); (Y.Lan); (J.Y.)
| | - Yu Lan
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou 510632, China
- Corresponding author. (D.W.); (B.L.); (Y.Lan); (J.Y.)
| | - Jia Yu
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing 100005, China
- The Key Laboratory of RNA and Hematopoietic Regulation, Chinese Academy of Medical Sciences, Beijing 100005, China
- Corresponding author. (D.W.); (B.L.); (Y.Lan); (J.Y.)
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11
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Adams EJ, Khoriaty R, Kiseleva A, Cleuren ACA, Tomberg K, van der Ent MA, Gergics P, Tang VT, Zhu G, Hoenerhoff MJ, O'Shea KS, Saunders TL, Ginsburg D. Murine SEC24D can substitute functionally for SEC24C during embryonic development. Sci Rep 2021; 11:21100. [PMID: 34702932 PMCID: PMC8548507 DOI: 10.1038/s41598-021-00579-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 10/07/2021] [Indexed: 11/30/2022] Open
Abstract
The COPII component SEC24 mediates the recruitment of transmembrane cargos or cargo adaptors into newly forming COPII vesicles on the ER membrane. Mammalian genomes encode four Sec24 paralogs (Sec24a-d), with two subfamilies based on sequence homology (SEC24A/B and C/D), though little is known about their comparative functions and cargo-specificities. Complete deficiency for Sec24d results in very early embryonic lethality in mice (before the 8 cell stage), with later embryonic lethality (E7.5) observed in Sec24c null mice. To test the potential overlap in function between SEC24C/D, we employed dual recombinase mediated cassette exchange to generate a Sec24cc-d allele, in which the C-terminal 90% of SEC24C has been replaced by SEC24D coding sequence. In contrast to the embryonic lethality at E7.5 of SEC24C-deficiency, Sec24cc-d/c-d pups survive to term, though dying shortly after birth. Sec24cc-d/c-d pups are smaller in size, but exhibit no other obvious developmental abnormality by pathologic evaluation. These results suggest that tissue-specific and/or stage-specific expression of the Sec24c/d genes rather than differences in cargo export function explain the early embryonic requirements for SEC24C and SEC24D.
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Affiliation(s)
- Elizabeth J Adams
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, 48109, USA
- Constellation Pharmaceuticals, Cambridge, MA, 02142, USA
| | - Rami Khoriaty
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA.
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
- Univeristy of Michigan Rogel Cancer Center, Ann Arbor, MI, 48109, USA.
| | - Anna Kiseleva
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Audrey C A Cleuren
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Kärt Tomberg
- Departement of Human Genetics, University of Michigan, Ann Arbor, MI, 48109, USA
| | | | - Peter Gergics
- Departement of Human Genetics, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Vi T Tang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Mark J Hoenerhoff
- In Vivo Animal Core, Unit of Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - K Sue O'Shea
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Thomas L Saunders
- Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, 48109, USA
| | - David Ginsburg
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA.
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA.
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, 48109, USA.
- Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI, 48109, USA.
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12
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Gücüm S, Sakson R, Hoffmann M, Grote V, Becker C, Pakari K, Beedgen L, Thiel C, Rapp E, Ruppert T, Thumberger T, Wittbrodt J. A patient-based medaka alg2 mutant as a model for hypo-N-glycosylation. Development 2021; 148:269015. [PMID: 34106226 PMCID: PMC8217707 DOI: 10.1242/dev.199385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 05/04/2021] [Indexed: 11/20/2022]
Abstract
Defects in the evolutionarily conserved protein-glycosylation machinery during embryonic development are often fatal. Consequently, congenital disorders of glycosylation (CDG) in human are rare. We modelled a putative hypomorphic mutation described in an alpha-1,3/1,6-mannosyltransferase (ALG2) index patient (ALG2-CDG) to address the developmental consequences in the teleost medaka (Oryzias latipes). We observed specific, multisystemic, late-onset phenotypes, closely resembling the patient's syndrome, prominently in the facial skeleton and in neuronal tissue. Molecularly, we detected reduced levels of N-glycans in medaka and in the patient's fibroblasts. This hypo-N-glycosylation prominently affected protein abundance. Proteins of the basic glycosylation and glycoprotein-processing machinery were over-represented in a compensatory response, highlighting the regulatory topology of the network. Proteins of the retinal phototransduction machinery, conversely, were massively under-represented in the alg2 model. These deficiencies relate to a specific failure to maintain rod photoreceptors, resulting in retinitis pigmentosa characterized by the progressive loss of these photoreceptors. Our work has explored only the tip of the iceberg of N-glycosylation-sensitive proteins, the function of which specifically impacts on cells, tissues and organs. Taking advantage of the well-described human mutation has allowed the complex interplay of N-glycosylated proteins and their contribution to development and disease to be addressed.
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Affiliation(s)
- Sevinç Gücüm
- COS, Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany.,HBIGS, Heidelberg Biosciences International Graduate School, Heidelberg University, 69120 Heidelberg, Germany
| | - Roman Sakson
- HBIGS, Heidelberg Biosciences International Graduate School, Heidelberg University, 69120 Heidelberg, Germany.,Core facility for Mass Spectrometry and Proteomics, Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH), DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany
| | - Marcus Hoffmann
- Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany
| | - Valerian Grote
- Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany
| | - Clara Becker
- COS, Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Kaisa Pakari
- COS, Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Lars Beedgen
- Center for Child and Adolescent Medicine, Department Pediatrics I, Heidelberg University, 69120 Heidelberg, Germany
| | - Christian Thiel
- Center for Child and Adolescent Medicine, Department Pediatrics I, Heidelberg University, 69120 Heidelberg, Germany
| | - Erdmann Rapp
- Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany.,glyXera GmbH, 39120 Magdeburg, Germany
| | - Thomas Ruppert
- Core facility for Mass Spectrometry and Proteomics, Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH), DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany
| | - Thomas Thumberger
- COS, Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Joachim Wittbrodt
- COS, Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
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13
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ATP7A-Regulated Enzyme Metalation and Trafficking in the Menkes Disease Puzzle. Biomedicines 2021; 9:biomedicines9040391. [PMID: 33917579 PMCID: PMC8067471 DOI: 10.3390/biomedicines9040391] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 12/12/2022] Open
Abstract
Copper is vital for numerous cellular functions affecting all tissues and organ systems in the body. The copper pump, ATP7A is critical for whole-body, cellular, and subcellular copper homeostasis, and dysfunction due to genetic defects results in Menkes disease. ATP7A dysfunction leads to copper deficiency in nervous tissue, liver, and blood but accumulation in other tissues. Site-specific cellular deficiencies of copper lead to loss of function of copper-dependent enzymes in all tissues, and the range of Menkes disease pathologies observed can now be explained in full by lack of specific copper enzymes. New pathways involving copper activated lysosomal and steroid sulfatases link patient symptoms usually related to other inborn errors of metabolism to Menkes disease. Additionally, new roles for lysyl oxidase in activation of molecules necessary for the innate immune system, and novel adapter molecules that play roles in ERGIC trafficking of brain receptors and other proteins, are emerging. We here summarize the current knowledge of the roles of copper enzyme function in Menkes disease, with a focus on ATP7A-mediated enzyme metalation in the secretory pathway. By establishing mechanistic relationships between copper-dependent cellular processes and Menkes disease symptoms in patients will not only increase understanding of copper biology but will also allow for the identification of an expanding range of copper-dependent enzymes and pathways. This will raise awareness of rare patient symptoms, and thus aid in early diagnosis of Menkes disease patients.
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14
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Kim S, Khoriaty R, Li L, McClune M, Kalfa TA, Wu J, Peltier D, Fujiwara H, Sun Y, Oravecz-Wilson K, King RA, Ginsburg D, Reddy P. ER-to-Golgi transport and SEC23-dependent COPII vesicles regulate T cell alloimmunity. J Clin Invest 2021; 131:136574. [PMID: 33463537 DOI: 10.1172/jci136574] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 11/12/2020] [Indexed: 01/24/2023] Open
Abstract
T cell-mediated responses are dependent on their secretion of key effector molecules. However, the critical molecular determinants of the secretion of these proteins are largely undefined. Here, we demonstrate that T cell activation increases trafficking via the ER-to-Golgi pathway. To study the functional role of this pathway, we generated mice with a T cell-specific deletion in SEC23B, a core subunit of coat protein complex II (COPII). We found that SEC23B critically regulated the T cell secretome following activation. SEC23B-deficient T cells exhibited a proliferative defect and reduced effector functions in vitro, as well as in experimental models of allogeneic and xenogeneic hematopoietic cell transplantation in vivo. However, T cells derived from 3 patients with congenital dyserythropoietic anemia II (CDAII), which results from Sec23b mutation, did not exhibit a similar phenotype. Mechanistic studies demonstrated that unlike murine KO T cells, T cells from patients with CDAII harbor increased levels of the closely related paralog, SEC23A. In vivo rescue of murine KO by expression of Sec23a from the Sec23b genomic locus restored T cell functions. Together, our data demonstrate a critical role for the COPII pathway, with evidence for functional overlap in vivo between SEC23 paralogs in the regulation of T cell immunity in both mice and humans.
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Affiliation(s)
- Stephanie Kim
- Department of Internal Medicine, Division of Hematology and Oncology.,Medical Scientist Training Program, and
| | - Rami Khoriaty
- Department of Internal Medicine, Division of Hematology and Oncology.,Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Lu Li
- Department of Internal Medicine, Division of Hematology and Oncology
| | - Madison McClune
- Department of Internal Medicine, Division of Hematology and Oncology
| | - Theodosia A Kalfa
- Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Julia Wu
- Department of Internal Medicine, Division of Hematology and Oncology.,Medical Scientist Training Program, and
| | - Daniel Peltier
- Department of Pediatrics, Division of Hematology and Oncology
| | - Hideaki Fujiwara
- Department of Internal Medicine, Division of Hematology and Oncology
| | - Yaping Sun
- Department of Internal Medicine, Division of Hematology and Oncology
| | | | - Richard A King
- Department of Internal Medicine, Division of Hematology and Oncology
| | - David Ginsburg
- Department of Internal Medicine, Division of Hematology and Oncology.,Department of Pediatrics, Division of Hematology and Oncology.,Department of Human Genetics.,Life Sciences Institute.,Howard Hughes Medical Institute, and.,Department of Internal Medicine, Division of Genetic Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Pavan Reddy
- Department of Internal Medicine, Division of Hematology and Oncology
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15
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Bisnett BJ, Condon BM, Lamb CH, Georgiou GR, Boyce M. Export Control: Post-transcriptional Regulation of the COPII Trafficking Pathway. Front Cell Dev Biol 2021; 8:618652. [PMID: 33511128 PMCID: PMC7835409 DOI: 10.3389/fcell.2020.618652] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 12/14/2020] [Indexed: 11/13/2022] Open
Abstract
The coat protein complex II (COPII) mediates forward trafficking of protein and lipid cargoes from the endoplasmic reticulum. COPII is an ancient and essential pathway in all eukaryotes and COPII dysfunction underlies a range of human diseases. Despite this broad significance, major aspects of COPII trafficking remain incompletely understood. For example, while the biochemical features of COPII vesicle formation are relatively well characterized, much less is known about how the COPII system dynamically adjusts its activity to changing physiologic cues or stresses. Recently, post-transcriptional mechanisms have emerged as a major mode of COPII regulation. Here, we review the current literature on how post-transcriptional events, and especially post-translational modifications, govern the COPII pathway.
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Affiliation(s)
- Brittany J Bisnett
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Brett M Condon
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Caitlin H Lamb
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - George R Georgiou
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Michael Boyce
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
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16
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Altered phenotype in LMAN1-deficient mice with low levels of residual LMAN1 expression. Blood Adv 2020; 4:5635-5643. [PMID: 33196840 PMCID: PMC7686883 DOI: 10.1182/bloodadvances.2020002523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 10/13/2020] [Indexed: 01/28/2023] Open
Abstract
Combined deficiency of coagulation factors V and VIII (F5F8D) is an autosomal recessive bleeding disorder caused by loss-of-function mutations in either LMAN1 or MCFD2. The latter genes encode 2 components of a mammalian cargo receptor that facilitates secretion of coagulation factor V (FV) and factor VIII (FVIII) from the endoplasmic reticulum (ER) to the Golgi via coat protein complex II vesicles. F5F8D patients exhibit FV and FVIII levels that are ∼10% to 15% of normal. We report herein a comparative analysis for a series of murine Lman1 alleles. Consistent with previous reports, mice completely deficient in LMAN1 (Lman1-/-) exhibit ∼50% FV and FVIII levels. In contrast, mice carrying a hypomorphic Lman1 allele (Lman1cgt/cgt) that expresses ∼6% to 8% of wild-type Lman1 mRNA levels exhibit intermediate plasma FV and FVIII reductions (∼70% of wild-type levels). Lman1-/- mice exhibit ER accumulation of another LMAN1 cargo, alpha-1 antitrypsin (A1AT), with an intermediate level of A1AT ER retention observed in Lman1cgt/cgt mice. Finally, the previously reported strain-specific, partially penetrant, perinatal lethality of LMAN1-deficient mice (Lman1gt1/gt1) was confirmed in Lman1-/- mice, although it was not observed in Lman1cgt/cgt mice. Taken together, these results show a dose-dependent effect of residual LMAN1 on the secretion of its cargo proteins. The results also suggest that human subjects with hypomorphic LMAN1 mutations might present with mild bleeding phenotypes resulting from more modest reductions in FV and FVIII, which could be missed by routine clinical evaluation. Finally, these findings suggest that therapeutic targeting of LMAN1 to reduce FV and FVIII as an anticoagulant strategy may only require partial inhibition of LMAN1 function.
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17
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Hepatitis B Virus Exploits ERGIC-53 in Conjunction with COPII to Exit Cells. Cells 2020; 9:cells9081889. [PMID: 32806600 PMCID: PMC7464876 DOI: 10.3390/cells9081889] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/05/2020] [Accepted: 08/10/2020] [Indexed: 12/20/2022] Open
Abstract
Several decades after its discovery, the hepatitis B virus (HBV) still displays one of the most successful pathogens in human populations worldwide. The identification and characterization of interactions between cellular and pathogenic components are essential for the development of antiviral treatments. Due to its small-sized genome, HBV highly depends on cellular functions to produce and export progeny particles. Deploying biochemical-silencing methods and molecular interaction studies in HBV-expressing liver cells, we herein identified the cellular ERGIC-53, a high-mannose-specific lectin, and distinct components of the endoplasmic reticulum (ER) export machinery COPII as crucial factors of viral trafficking and egress. Whereas the COPII subunits Sec24A, Sec23B and Sar1 are needed for both viral and subviral HBV particle exit, ERGIC-53 appears as an exclusive element of viral particle propagation, therefore interacting with the N146-glycan of the HBV envelope in a productive manner. Cell-imaging studies pointed to ER-derived, subcellular compartments where HBV assembly initiates. Moreover, our findings provide evidence that HBV exploits the functions of ERGIC-53 and Sec24A after the envelopment of nucleocapsids at these compartments in conjunction with endosomal sorting complexes required for transport (ESCRT) components. These data reveal novel insights into HBV assembly and trafficking, illustrating therapeutic prospects for intervening with the viral life cycle.
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18
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Yang C, Chen N, Li X, Lu D, Hou Z, Li Y, Jin Y, Gu J, Yin Y. Mutations in the coat complex II component SEC23B promote colorectal cancer metastasis. Cell Death Dis 2020; 11:157. [PMID: 32123160 PMCID: PMC7052170 DOI: 10.1038/s41419-020-2358-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 02/07/2023]
Abstract
Metastasis is the leading cause of death for colorectal cancer (CRC). However, the protein transport process involved in CRC metastasis remains unclear. In this report, we use whole-exome sequencing and bioinformatics analysis to identify somatic mutations in CRC samples and found mutations of the protein transport gene Sec23 homolog B (SEC23B) in patients with metachronous liver metastasis. We show that deletion of SEC23B suppresses the membrane localization of adhesion proteins and augments cell mobility. SEC23B mutations either cause a premature stop (C649T) or impair its protein transport activity (C1467G and T488C + G791A + G2153A). Furthermore, SEC23B mutations inhibit the transport of epithelial cell adhesion molecule (EPCAM) and CD9 molecule, thereby attenuating cell adhesion and promoting invasiveness both in vitro and in vivo. Taken together, these data demonstrate the important impact of SEC23B mutations on metastasis, and we propose that SEC23B is a potential suppressor of CRC metastasis.
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Affiliation(s)
- Chunyuan Yang
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China
| | - Nan Chen
- Department of Gastrointestinal Center, Peking University Cancer Hospital and Institute, 100142, Beijing, P. R. China
| | - Xiang Li
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China
| | - Dan Lu
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking-Tsinghua Center for Life Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China
| | - Zhiyuan Hou
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking-Tsinghua Center for Life Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China
| | - Yuhua Li
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking-Tsinghua Center for Life Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China
| | - Yan Jin
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking-Tsinghua Center for Life Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China
| | - Jin Gu
- Department of Gastrointestinal Center, Peking University Cancer Hospital and Institute, 100142, Beijing, P. R. China.
| | - Yuxin Yin
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China. .,Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking-Tsinghua Center for Life Sciences, Peking University Health Science Center, 100191, Beijing, P. R. China.
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19
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Jing J, Wang B, Liu P. The Functional Role of SEC23 in Vesicle Transportation, Autophagy and Cancer. Int J Biol Sci 2019; 15:2419-2426. [PMID: 31595159 PMCID: PMC6775307 DOI: 10.7150/ijbs.37008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 08/01/2019] [Indexed: 02/06/2023] Open
Abstract
SEC23, the core component of the coat protein complex II (COPII), functions to transport newly synthesized proteins and lipids from the endoplasmic reticulum (ER) to the Golgi apparatus in cells for secretion. SEC23 protein has two isoforms (SEC23A and SEC23B) and their aberrant expression and mutations were reported to cause human diseases and oncogenesis, whereas SEC23A and SEC23B may have the opposite activity in human cancer, for a reason that remains unclear. This review summarizes recent research in SEC23, COPII-vesicle transportation, autophagy, and cancer.
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Affiliation(s)
- Jingchen Jing
- Center for Translational Medicine, The First Affiliated Hospital, Xi'an Jiaotong University.,The Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Bo Wang
- Center for Translational Medicine, The First Affiliated Hospital, Xi'an Jiaotong University.,The Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Peijun Liu
- Center for Translational Medicine, The First Affiliated Hospital, Xi'an Jiaotong University.,The Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
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20
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Deng J, Li D, Mei H, Tang L, Wang HF, Hu Y. Combined deficiency of factors V and VIII in a Chinese family due to a novel nonsense mutation in lectin mannose binding protein 1. Int J Lab Hematol 2019; 42:e7-e9. [PMID: 31162802 DOI: 10.1111/ijlh.13054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 04/26/2019] [Accepted: 05/03/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Jun Deng
- Institute of Haematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Clinical and Research Centre of Thrombosis and Haemostasis, Wuhan, China
| | - Dan Li
- Institute of Haematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Heng Mei
- Institute of Haematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Clinical and Research Centre of Thrombosis and Haemostasis, Wuhan, China
| | - Liang Tang
- Institute of Haematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Clinical and Research Centre of Thrombosis and Haemostasis, Wuhan, China
| | - Hua-Fang Wang
- Institute of Haematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Clinical and Research Centre of Thrombosis and Haemostasis, Wuhan, China
| | - Yu Hu
- Institute of Haematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Clinical and Research Centre of Thrombosis and Haemostasis, Wuhan, China
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21
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Fu YL, Zhang B, Mu TW. LMAN1 (ERGIC-53) promotes trafficking of neuroreceptors. Biochem Biophys Res Commun 2019; 511:356-362. [PMID: 30791981 DOI: 10.1016/j.bbrc.2019.02.053] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 02/10/2019] [Indexed: 12/15/2022]
Abstract
The endoplasmic reticulum-Golgi intermediate compartment protein-53 (ERGIC-53, aka LMAN1), which cycles between the endoplasmic reticulum (ER) and Golgi, is a known cargo receptor for a number of soluble proteins. However, whether LMAN1 plays a role as a trafficking factor in the central nervous system is largely unknown. Here, we determined the role of LMAN1 on endogenous protein levels of the Cys-loop superfamily of neuroreceptors, including gamma-aminobutyric acid type A receptors (GABAARs), 5-hydroxytryptamine (serotonin) type 3 (5-HT3) receptors, and nicotinic acetylcholine receptors (nAChRs). Knockdown of LMAN1 reduces the surface trafficking of endogenous β3 subunits of GABAARs in mouse hypothalamic GT1-7 neurons. Furthermore, Western blot analysis of brain homogenates from LMAN1 knockout mice demonstrated that loss of LMAN1 decreases the total protein levels of 5HT3A receptors and γ2 subunits of GABAARs. LMAN1 knockout regulates the ER proteostasis network by upregulating ERP44 without changing calnexin levels. Interestingly, despite the critical role of the glycan-binding function of LMAN1 in its other known cargo clients, LMAN1 interacts with GABAARs in a glycan-independent manner. In summary, LMAN1 is a trafficking factor for certain neuroreceptors in the central nervous system. This is the first report of LMAN1 function in membrane protein trafficking.
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Affiliation(s)
- Yan-Lin Fu
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Bin Zhang
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, OH, USA
| | - Ting-Wei Mu
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
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22
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Halperin D, Kadir R, Perez Y, Drabkin M, Yogev Y, Wormser O, Berman EM, Eremenko E, Rotblat B, Shorer Z, Gradstein L, Shelef I, Birk R, Abdu U, Flusser H, Birk OS. SEC31A mutation affects ER homeostasis, causing a neurological syndrome. J Med Genet 2018; 56:139-148. [PMID: 30464055 DOI: 10.1136/jmedgenet-2018-105503] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 10/22/2018] [Accepted: 10/30/2018] [Indexed: 11/03/2022]
Abstract
BACKGROUND Consanguineous kindred presented with an autosomal recessive syndrome of intrauterine growth retardation, marked developmental delay, spastic quadriplegia with profound contractures, pseudobulbar palsy with recurrent aspirations, epilepsy, dysmorphism, neurosensory deafness and optic nerve atrophy with no eye fixation. Affected individuals died by the age of 4. Brain MRI demonstrated microcephaly, semilobar holoprosencephaly and agenesis of corpus callosum. We aimed at elucidating the molecular basis of this disease. METHODS Genome-wide linkage analysis combined with whole exome sequencing were performed to identify disease-causing variants. Functional consequences were investigated in fruit flies null mutant for the Drosophila SEC31A orthologue. SEC31A knockout SH-SY5Y and HEK293T cell-lines were generated using CRISPR/Cas9 and studied through qRT-PCR, immunoblotting and viability assays. RESULTS Through genetic studies, we identified a disease-associated homozygous nonsense mutation in SEC31A. We demonstrate that SEC31A is ubiquitously expressed, and that the mutation triggers nonsense-mediated decay of its transcript, comprising a practical null mutation. Similar to the human disease phenotype, knockdown SEC31A flies had defective brains and early lethality. Moreover, in line with SEC31A encoding one of the two coating layers comprising the Coat protein complex II (COP-II) complex, trafficking newly synthesised proteins from the endoplasmic reticulum (ER) to the Golgi, CRISPR/Cas9-mediated SEC31A null mutant cells demonstrated reduced viability through upregulation of ER-stress pathways. CONCLUSION We demonstrate through human and Drosophila genetic and in vitro molecular studies, that a severe neurological syndrome is caused by a null mutation in SEC31A, reducing cell viability through enhanced ER-stress response, in line with SEC31A's role in the COP-II complex.
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Affiliation(s)
- Daniel Halperin
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Rotem Kadir
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Yonatan Perez
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Max Drabkin
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Yuval Yogev
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ohad Wormser
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Erez M Berman
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ekaterina Eremenko
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Zlotowski Center for Neuroscience, The National Institute of Biotechnology in the Negev; Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Barak Rotblat
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Zamir Shorer
- Pediatric Neurology Unit, Division of Pediatrics, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Libe Gradstein
- Department of Ophthalmology, Clalit Health Services, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ilan Shelef
- Department of Imaging, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ruth Birk
- Department of Nutrition, Faculty of Health Sciences, Ariel University, Ariel, Israel
| | - Uri Abdu
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Hagit Flusser
- Zussman Child Development Center, Division of Pediatrics, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ohad S Birk
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,Genetics Institute, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer Sheva, Israel
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23
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PAQR3 Regulates Endoplasmic Reticulum-to-Golgi Trafficking of COPII Vesicle via Interaction with Sec13/Sec31 Coat Proteins. iScience 2018; 9:382-398. [PMID: 30466064 PMCID: PMC6249397 DOI: 10.1016/j.isci.2018.11.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 09/06/2018] [Accepted: 10/29/2018] [Indexed: 11/20/2022] Open
Abstract
Endoplasmic reticulum (ER)-to-Golgi anterograde transport is driven by COPII vesicles mainly composed of a Sec23/Sec24 inner shell and a Sec13/Sec31 outer cage. How COPII vesicles are tethered to the Golgi is not completely understood. We demonstrated here that PAQR3 can facilitate tethering of COPII vesicles to the Golgi. Proximity labeling using PAQR3 fused with APEX2 identified that many proteins involved in intracellular transport are in close proximity to PAQR3. ER-to-Golgi trafficking of N-acetylgalactosaminyltransferase-2 on removal of brefeldin A is delayed by PAQR3 deletion. RUSH assay also revealed that ER-to-Golgi trafficking is affected by PAQR3. The N-terminal end of PAQR3 can interact with the WD domains of Sec13 and Sec31A. PAQR3 enhances Golgi localization of Sec13 and Sec31A. Furthermore, PAQR3 is localized in the ERGIC and cis-Golgi structures, the acceptor sites for COPII vesicles. Taken together, our study uncovers a role for PAQR3 as a player in regulating ER-to-Golgi transport of COPII vesicles.
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24
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Functions of the COPII gene paralogs SEC23A and SEC23B are interchangeable in vivo. Proc Natl Acad Sci U S A 2018; 115:E7748-E7757. [PMID: 30065114 DOI: 10.1073/pnas.1805784115] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Approximately one-third of the mammalian proteome is transported from the endoplasmic reticulum-to-Golgi via COPII-coated vesicles. SEC23, a core component of coat protein-complex II (COPII), is encoded by two paralogous genes in vertebrates (Sec23a and Sec23b). In humans, SEC23B deficiency results in congenital dyserythropoietic anemia type-II (CDAII), while SEC23A deficiency results in a skeletal phenotype (with normal red blood cells). These distinct clinical disorders, together with previous biochemical studies, suggest unique functions for SEC23A and SEC23B. Here we show indistinguishable intracellular protein interactomes for human SEC23A and SEC23B, complementation of yeast Sec23 by both human and murine SEC23A/B, and rescue of the lethality of sec23b deficiency in zebrafish by a sec23a-expressing transgene. We next demonstrate that a Sec23a coding sequence inserted into the murine Sec23b locus completely rescues the lethal SEC23B-deficient pancreatic phenotype. We show that SEC23B is the predominantly expressed paralog in human bone marrow, but not in the mouse, with the reciprocal pattern observed in the pancreas. Taken together, these data demonstrate an equivalent function for SEC23A/B, with evolutionary shifts in the transcription program likely accounting for the distinct phenotypes of SEC23A/B deficiency within and across species, a paradigm potentially applicable to other sets of paralogous genes. These findings also suggest that enhanced erythroid expression of the normal SEC23A gene could offer an effective therapeutic approach for CDAII patients.
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25
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Cox NJ, Unlu G, Bisnett BJ, Meister TR, Condon BM, Luo PM, Smith TJ, Hanna M, Chhetri A, Soderblom EJ, Audhya A, Knapik EW, Boyce M. Dynamic Glycosylation Governs the Vertebrate COPII Protein Trafficking Pathway. Biochemistry 2017; 57:91-107. [PMID: 29161034 DOI: 10.1021/acs.biochem.7b00870] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The COPII coat complex, which mediates secretory cargo trafficking from the endoplasmic reticulum, is a key control point for subcellular protein targeting. Because misdirected proteins cannot function, protein sorting by COPII is critical for establishing and maintaining normal cell and tissue homeostasis. Indeed, mutations in COPII genes cause a range of human pathologies, including cranio-lenticulo-sutural dysplasia (CLSD), which is characterized by collagen trafficking defects, craniofacial abnormalities, and skeletal dysmorphology. Detailed knowledge of the COPII pathway is required to understand its role in normal cell physiology and to devise new treatments for disorders in which it is disrupted. However, little is known about how vertebrates dynamically regulate COPII activity in response to developmental, metabolic, or pathological cues. Several COPII proteins are modified by O-linked β-N-acetylglucosamine (O-GlcNAc), a dynamic form of intracellular protein glycosylation, but the biochemical and functional effects of these modifications remain unclear. Here, we use a combination of chemical, biochemical, cellular, and genetic approaches to demonstrate that site-specific O-GlcNAcylation of COPII proteins mediates their protein-protein interactions and modulates cargo secretion. In particular, we show that individual O-GlcNAcylation sites of SEC23A, an essential COPII component, are required for its function in human cells and vertebrate development, because mutation of these sites impairs SEC23A-dependent in vivo collagen trafficking and skeletogenesis in a zebrafish model of CLSD. Our results indicate that O-GlcNAc is a conserved and critical regulatory modification in the vertebrate COPII-dependent trafficking pathway.
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Affiliation(s)
| | - Gokhan Unlu
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
| | | | | | | | | | | | - Michael Hanna
- Department of Biomolecular Chemistry, University of Wisconsin-Madison School of Medicine and Public Health , Madison, Wisconsin 53706, United States
| | | | - Erik J Soderblom
- Duke Proteomics and Metabolomics Core Facility, Center for Genomic and Computational Biology, Duke University , Durham, North Carolina 27710, United States
| | - Anjon Audhya
- Department of Biomolecular Chemistry, University of Wisconsin-Madison School of Medicine and Public Health , Madison, Wisconsin 53706, United States
| | - Ela W Knapik
- Departments of Medicine and Cell and Developmental Biology, Vanderbilt University Medical Center , Nashville, Tennessee 37232, United States
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26
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Unravelling pathways downstream Sox6 induction in K562 erythroid cells by proteomic analysis. Sci Rep 2017; 7:14088. [PMID: 29074889 PMCID: PMC5658338 DOI: 10.1038/s41598-017-14336-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 10/03/2017] [Indexed: 11/25/2022] Open
Abstract
The Sox6 transcription factor is crucial for terminal maturation of definitive red blood cells. Sox6-null mouse fetuses present misshapen and nucleated erythrocytes, due to impaired actin assembly and cytoskeleton stability. These defects are accompanied with a reduced survival of Sox6−/− red blood cells, resulting in a compensated anemia. Sox6-overexpression in K562 cells and in human primary ex vivo erythroid cultures enhances erythroid differentiation and leads to hemoglobinization, the hallmark of erythroid maturation. To obtain an overview on processes downstream to Sox6 expression, we performed a differential proteomic analysis on human erythroid K562 cells overexpressing Sox6. Sox6-overexpression induces dysregulation of 64 proteins, involved in cytoskeleton remodeling and in protein synthesis, folding and trafficking, key processes for erythroid maturation. Moreover, 43 out of 64 genes encoding for differentially expressed proteins contain within their proximal regulatory regions sites that are bound by SOX6 according to ENCODE ChIP-seq datasets and are possible direct SOX6 targets. SAR1B, one of the most induced proteins upon Sox6 overexpression, shares a conserved regulatory module, composed by a double SOX6 binding site and a GATA1 consensus, with the adjacent SEC24 A gene. Since both genes encode for COPII components, this element could concur to the coordinated expression of these proteins during erythropoiesis.
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27
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Wang Y, Ru Y, Liu G, Dong S, Li Y, Zhu X, Zhang F, Chang YZ, Nie G. Identification of CDAN1, C15ORF41 and SEC23B mutations in Chinese patients affected by congenital dyserythropoietic anemia. Gene 2017; 640:73-78. [PMID: 29031773 DOI: 10.1016/j.gene.2017.10.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 09/18/2017] [Accepted: 10/10/2017] [Indexed: 02/03/2023]
Abstract
Congenital dyserythropoietic anaemias (CDAs) are a group of rare haematological disorders characterized by ineffective erythropoiesis and dyserythropoiesis and reduced numbers of red cells, often with an abnormal morphology. Pathogenic defects in CDAN1, C15ORF41, SEC23B, KIF23, KLF1 and GATA1 genes have been identified in CDAs patients. In this study, we described 13 unrelated Chinese CDAs patients and identified 21 mutations, including 5 novel mutations in CDAN1 gene, and 5 novel mutations in SEC23B gene. Additionally, we predicted the molecular consequence of these missense mutations with Polymorphism Phenotyping v2 (Polyphen), Sorting Intolerant From Tolerant (SIFT), MutPred (http://mutpred1.mutdb.org/) and Protein Variation Effect Analyzer (Provean, http://provean.jcvi.org/seq_submit.php) and analyzed the conservation of the mutated amino acid among proteins from several mammalian species.
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Affiliation(s)
- Yongwei Wang
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei Province, China; CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yongxin Ru
- Institute of Hematology & Blood Disease Hospital, Chinese Academy of Medical Science, Peking Union Medical College, State Key Laboratory of Experimental Haematology, Tianjin, China
| | - Gang Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China; Section on Human Iron Metabolism, National Institute of Child Health and Human Development/NIH, 35 Convent Drive Porter Neuroscience II, 2D995A, Bethesda, MD 20892, United States
| | - Shuxu Dong
- Institute of Hematology & Blood Disease Hospital, Chinese Academy of Medical Science, Peking Union Medical College, State Key Laboratory of Experimental Haematology, Tianjin, China
| | - Yuan Li
- Institute of Hematology & Blood Disease Hospital, Chinese Academy of Medical Science, Peking Union Medical College, State Key Laboratory of Experimental Haematology, Tianjin, China
| | - Xiaofan Zhu
- Institute of Hematology & Blood Disease Hospital, Chinese Academy of Medical Science, Peking Union Medical College, State Key Laboratory of Experimental Haematology, Tianjin, China
| | - Fengkui Zhang
- Institute of Hematology & Blood Disease Hospital, Chinese Academy of Medical Science, Peking Union Medical College, State Key Laboratory of Experimental Haematology, Tianjin, China.
| | - Yan-Zhong Chang
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang 050024, Hebei Province, China.
| | - Guangjun Nie
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
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28
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Khoriaty R, Vogel N, Hoenerhoff MJ, Sans MD, Zhu G, Everett L, Nelson B, Durairaj H, McKnight B, Zhang B, Ernst SA, Ginsburg D, Williams JA. SEC23B is required for pancreatic acinar cell function in adult mice. Mol Biol Cell 2017; 28:2146-2154. [PMID: 28539403 PMCID: PMC5509426 DOI: 10.1091/mbc.e17-01-0001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 05/08/2017] [Accepted: 05/19/2017] [Indexed: 12/27/2022] Open
Abstract
Inactivation of Sec23b exclusively in the pancreatic acinar cells of adult mice results in loss of pancreatic mass, with evidence of cell loss, degeneration of exocrine cells (with smaller-than-normal zymogen granules and ER dilation), ER stress, and increased pancreatic cell apoptosis. Mice with germline absence of SEC23B die perinatally, exhibiting massive pancreatic degeneration. We generated mice with tamoxifen-inducible, pancreatic acinar cell–specific Sec23b deletion. Inactivation of Sec23b exclusively in the pancreatic acinar cells of adult mice results in decreased overall pancreatic weights from pancreatic cell loss (decreased pancreatic DNA, RNA, and total protein content), as well as degeneration of exocrine cells, decreased zymogen granules, and alterations in the endoplasmic reticulum (ER), ranging from vesicular ER to markedly expanded cisternae with accumulation of moderate-density content or intracisternal granules. Acinar Sec23b deletion results in induction of ER stress and increased apoptosis in the pancreas, potentially explaining the loss of pancreatic cells and decreased pancreatic weight. These findings demonstrate that SEC23B is required for normal function of pancreatic acinar cells in adult mice.
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Affiliation(s)
- Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Nancy Vogel
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Mark J Hoenerhoff
- In Vivo Animal Core, Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - M Dolors Sans
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Lesley Everett
- University of Michigan Medical School, University of Michigan, Ann Arbor, MI 48109
| | - Bradley Nelson
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Haritha Durairaj
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Brooke McKnight
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, MI 48109
| | - Bin Zhang
- Genomic Medicine Institute, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195
| | - Stephen A Ernst
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109 .,Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109.,Departments of Human Genetics and Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI 48109.,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI 48109
| | - John A Williams
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109 .,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
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29
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Bruno J, Brumfield A, Chaudhary N, Iaea D, McGraw TE. SEC16A is a RAB10 effector required for insulin-stimulated GLUT4 trafficking in adipocytes. J Cell Biol 2016; 214:61-76. [PMID: 27354378 PMCID: PMC4932369 DOI: 10.1083/jcb.201509052] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 06/08/2016] [Indexed: 12/19/2022] Open
Abstract
Sec16A is known to be required for COPII vesicle formation from the ER. Here, Bruno et al. show that, independent of its role at the ER, Sec16A is a RAB10 effector involved in the insulin-stimulated formation of specialized transport vesicles that ferry the GLUT4 glucose transporter to the plasma membrane of adipocytes. RAB10 is a regulator of insulin-stimulated translocation of the GLUT4 glucose transporter to the plasma membrane (PM) of adipocytes, which is essential for whole-body glucose homeostasis. We establish SEC16A as a novel RAB10 effector in this process. Colocalization of SEC16A with RAB10 is augmented by insulin stimulation, and SEC16A knockdown attenuates insulin-induced GLUT4 translocation, phenocopying RAB10 knockdown. We show that SEC16A and RAB10 promote insulin-stimulated mobilization of GLUT4 from a perinuclear recycling endosome/TGN compartment. We propose RAB10–SEC16A functions to accelerate formation of the vesicles that ferry GLUT4 to the PM during insulin stimulation. Because GLUT4 continually cycles between the PM and intracellular compartments, the maintenance of elevated cell-surface GLUT4 in the presence of insulin requires accelerated biogenesis of the specialized GLUT4 transport vesicles. The function of SEC16A in GLUT4 trafficking is independent of its previously characterized activity in ER exit site formation and therefore independent of canonical COPII-coated vesicle function. However, our data support a role for SEC23A, but not the other COPII components SEC13, SEC23B, and SEC31, in the insulin stimulation of GLUT4 trafficking, suggesting that vesicles derived from subcomplexes of COPII coat proteins have a role in the specialized trafficking of GLUT4.
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Affiliation(s)
- Joanne Bruno
- Department of Biochemistry, Weill Cornell Medical College, New York, NY 10065 Weill Cornell/Rockefeller/Sloan Kettering Tri-Institutional MD-PhD Program, New York, NY 10065
| | | | - Natasha Chaudhary
- Department of Biochemistry, Weill Cornell Medical College, New York, NY 10065
| | - David Iaea
- Department of Biochemistry, Weill Cornell Medical College, New York, NY 10065
| | - Timothy E McGraw
- Department of Biochemistry, Weill Cornell Medical College, New York, NY 10065 Department of Cardiothoracic Surgery, Weill Cornell Medical College, New York, NY 10065
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30
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Khoriaty R, Everett L, Chase J, Zhu G, Hoenerhoff M, McKnight B, Vasievich MP, Zhang B, Tomberg K, Williams J, Maillard I, Ginsburg D. Pancreatic SEC23B deficiency is sufficient to explain the perinatal lethality of germline SEC23B deficiency in mice. Sci Rep 2016; 6:27802. [PMID: 27297878 PMCID: PMC4906273 DOI: 10.1038/srep27802] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 05/25/2016] [Indexed: 01/18/2023] Open
Abstract
In humans, loss of function mutations in SEC23B result in Congenital Dyserythropoietic Anemia type II (CDAII), a disease limited to defective erythroid development. Patients with two nonsense SEC23B mutations have not been reported, suggesting that complete SEC23B deficiency might be lethal. We previously reported that SEC23B-deficient mice die perinatally, exhibiting massive pancreatic degeneration and that mice with hematopoietic SEC23B deficiency do not exhibit CDAII. We now show that SEC23B deficiency restricted to the pancreas is sufficient to explain the lethality observed in mice with global SEC23B-deficiency. Immunohistochemical stains demonstrate an acinar cell defect but normal islet cells. Mammalian genomes contain two Sec23 paralogs, Sec23A and Sec23B. The encoded proteins share ~85% amino acid sequence identity. We generate mice with pancreatic SEC23A deficiency and demonstrate that these mice survive normally, exhibiting normal pancreatic weights and histology. Taken together, these data demonstrate that SEC23B but not SEC23A is essential for murine pancreatic development. We also demonstrate that two BAC transgenes spanning Sec23b rescue the lethality of mice homozygous for a Sec23b gene trap allele, excluding a passenger gene mutation as the cause of the pancreatic lethality, and indicating that the regulatory elements critical for Sec23b pancreatic function reside within the BAC transgenes.
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Affiliation(s)
- Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Lesley Everett
- University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jennifer Chase
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Mark Hoenerhoff
- In Vivo Animal Core, Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Brooke McKnight
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, MI, USA
| | | | - Bin Zhang
- Genomic Medicine Institute, Cleveland Clinic Lerner Research Institute, Cleveland, OH, USA
| | - Kärt Tomberg
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - John Williams
- Department of Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Ivan Maillard
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA.,Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI, USA.,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI, USA
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31
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Nadezhdina ES. Logistics in the cell: cargoes and transportation. BIOCHEMISTRY (MOSCOW) 2015; 79:847-8. [PMID: 25385012 DOI: 10.1134/s0006297914090016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Eukaryotic cells are large and thus require a vesicular transport system. The system involves the formation of membrane transport containers, their short- and long-distance movements, recognition of destination points, and fusion with other membranes. Understanding the molecular mechanisms of these processes is of theoretical and practical significance. This special issue of Biochemistry (Moscow) collects surveys and experimental articles describing various aspects of vesicular transport.
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32
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Kertai MD, Li YJ, Li YW, Ji Y, Alexander J, Newman MF, Smith PK, Joseph D, Mathew JP, Podgoreanu MV. Genome-wide association study of perioperative myocardial infarction after coronary artery bypass surgery. BMJ Open 2015; 5:e006920. [PMID: 25948407 PMCID: PMC4431169 DOI: 10.1136/bmjopen-2014-006920] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVES Identification of patient subpopulations susceptible to develop myocardial infarction (MI) or, conversely, those displaying either intrinsic cardioprotective phenotypes or highly responsive to protective interventions remain high-priority knowledge gaps. We sought to identify novel common genetic variants associated with perioperative MI in patients undergoing coronary artery bypass grafting using genome-wide association methodology. SETTING 107 secondary and tertiary cardiac surgery centres across the USA. PARTICIPANTS We conducted a stage I genome-wide association study (GWAS) in 1433 ethnically diverse patients of both genders (112 cases/1321 controls) from the Genetics of Myocardial Adverse Outcomes and Graft Failure (GeneMAGIC) study, and a stage II analysis in an expanded population of 2055 patients (225 cases/1830 controls) combined from the GeneMAGIC and Duke Perioperative Genetics and Safety Outcomes (PEGASUS) studies. Patients undergoing primary non-emergent coronary bypass grafting were included. PRIMARY AND SECONDARY OUTCOME MEASURES The primary outcome variable was perioperative MI, defined as creatine kinase MB isoenzyme (CK-MB) values ≥10× upper limit of normal during the first postoperative day, and not attributable to preoperative MI. Secondary outcomes included postoperative CK-MB as a quantitative trait, or a dichotomised phenotype based on extreme quartiles of the CK-MB distribution. RESULTS Following quality control and adjustment for clinical covariates, we identified 521 single nucleotide polymorphisms in the stage I GWAS analysis. Among these, 8 common variants in 3 genes or intergenic regions met p<10(-5) in stage II. A secondary analysis using CK-MB as a quantitative trait (minimum p=1.26×10(-3) for rs609418), or a dichotomised phenotype based on extreme CK-MB values (minimum p=7.72×10(-6) for rs4834703) supported these findings. Pathway analysis revealed that genes harbouring top-scoring variants cluster in pathways of biological relevance to extracellular matrix remodelling, endoplasmic reticulum-to-Golgi transport and inflammation. CONCLUSIONS Using a two-stage GWAS and pathway analysis, we identified and prioritised several potential susceptibility loci for perioperative MI.
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Affiliation(s)
- Miklos D Kertai
- Division of Cardiothoracic Anesthesiology, Duke University, Durham, North Carolina, USA
| | - Yi-Ju Li
- Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina, USA
- Duke Molecular Physiology Institute; Duke University, Durham, North Carolina, USA
| | - Yen-Wei Li
- Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina, USA
| | - Yunqi Ji
- Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina, USA
| | - John Alexander
- Division of Cardiology, Duke University, Durham, North Carolina, USA
- Duke Clinical Research Institute; Duke University, Durham, North Carolina, USA
| | - Mark F Newman
- Division of Cardiothoracic Anesthesiology, Duke University, Durham, North Carolina, USA
- Duke Clinical Research Institute; Duke University, Durham, North Carolina, USA
| | - Peter K Smith
- Cardiac Surgery; Duke University, Durham, North Carolina, USA
| | - Diane Joseph
- Duke Clinical Research Institute; Duke University, Durham, North Carolina, USA
| | - Joseph P Mathew
- Division of Cardiothoracic Anesthesiology, Duke University, Durham, North Carolina, USA
| | - Mihai V Podgoreanu
- Division of Cardiothoracic Anesthesiology, Duke University, Durham, North Carolina, USA
- Duke Clinical Research Institute; Duke University, Durham, North Carolina, USA
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33
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Absence of a red blood cell phenotype in mice with hematopoietic deficiency of SEC23B. Mol Cell Biol 2014; 34:3721-34. [PMID: 25071156 DOI: 10.1128/mcb.00287-14] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Congenital dyserythropoietic anemia type II (CDAII) is an autosomal recessive disease of ineffective erythropoiesis characterized by increased bi/multinucleated erythroid precursors in the bone marrow. CDAII results from mutations in SEC23B. The SEC23 protein is a core component of coat protein complex II-coated vesicles, which transport secretory proteins from the endoplasmic reticulum to the Golgi apparatus. Though the genetic defect underlying CDAII has been identified, the pathophysiology of this disease remains unknown. We previously reported that SEC23B-deficient mice die perinatally, exhibiting massive pancreatic degeneration, with this early mortality limiting evaluation of the adult hematopoietic compartment. We now report that mice with SEC23B deficiency restricted to the hematopoietic compartment survive normally and do not exhibit anemia or other CDAII characteristics. We also demonstrate that SEC23B-deficient hematopoietic stem cells (HSC) do not exhibit a disadvantage at reconstituting hematopoiesis when compared directly to wild-type HSC in a competitive repopulation assay. Secondary bone marrow transplants demonstrated continued equivalence of SEC23B-deficient and WT HSC in their hematopoietic reconstitution potential. The surprising discordance in phenotypes between SEC23B-deficient mice and humans may reflect an evolutionary shift in SEC23 paralog function and/or expression, or a change in a specific COPII cargo critical for erythropoiesis.
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Klaus J, Eisenhauer P, Russo J, Mason AB, Do D, King B, Taatjes D, Cornillez-Ty C, Boyson J, Thali M, Zheng C, Liao L, Yates J, Zhang B, Ballif B, Botten J. The intracellular cargo receptor ERGIC-53 is required for the production of infectious arenavirus, coronavirus, and filovirus particles. Cell Host Microbe 2014; 14:522-34. [PMID: 24237698 PMCID: PMC3999090 DOI: 10.1016/j.chom.2013.10.010] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 08/02/2013] [Accepted: 09/18/2013] [Indexed: 12/21/2022]
Abstract
Arenaviruses and hantaviruses cause severe human disease. Little is known regarding host proteins required for their propagation. We identified human proteins that interact with the glycoproteins (GPs) of a prototypic arenavirus and hantavirus and show that the lectin endoplasmic reticulum (ER)-Golgi intermediate compartment 53 kDa protein (ERGIC-53), a cargo receptor required for glycoprotein trafficking within the early exocytic pathway, associates with arenavirus, hantavirus, coronavirus, orthomyxovirus, and filovirus GPs. ERGIC-53 binds to arenavirus GPs through a lectin-independent mechanism, traffics to arenavirus budding sites, and is incorporated into virions. ERGIC-53 is required for arenavirus, coronavirus, and filovirus propagation; in its absence, GP-containing virus particles form but are noninfectious, due in part to their inability to attach to host cells. Thus, we have identified a class of pathogen-derived ERGIC-53 ligands, a lectin-independent basis for their association with ERGIC-53, and a role for ERGIC-53 in the propagation of several highly pathogenic RNA virus families.
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Affiliation(s)
- Joseph P. Klaus
- Department of Medicine, Division of Immunobiology, University of Vermont, Burlington, VT 05405, USA
- Cellular, Molecular and Biomedical Sciences Graduate Program, University of Vermont, Burlington, VT 05405, USA
| | - Philip Eisenhauer
- Department of Medicine, Division of Immunobiology, University of Vermont, Burlington, VT 05405, USA
| | - Joanne Russo
- Department of Medicine, Division of Immunobiology, University of Vermont, Burlington, VT 05405, USA
| | - Anne B. Mason
- Department of Biochemistry, University of Vermont, Burlington, VT 05405, USA
| | - Danh Do
- Department of Medicine, Division of Immunobiology, University of Vermont, Burlington, VT 05405, USA
| | - Benjamin King
- Department of Medicine, Division of Immunobiology, University of Vermont, Burlington, VT 05405, USA
- Cellular, Molecular and Biomedical Sciences Graduate Program, University of Vermont, Burlington, VT 05405, USA
| | - Douglas Taatjes
- Department of Pathology, University of Vermont, Burlington, VT 05405, USA
| | | | | | - Markus Thali
- Department of Microbiology and Molecular Genetics, University of Vermont, Burlington, VT 05405, USA
| | - Chunlei Zheng
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, OH 44195, USA
| | - Lujian Liao
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - John R. Yates
- The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Bin Zhang
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, OH 44195, USA
| | - Bryan A. Ballif
- Department of Biology, University of Vermont, Burlington, VT 05405, USA
| | - Jason W. Botten
- Department of Medicine, Division of Immunobiology, University of Vermont, Burlington, VT 05405, USA
- Department of Microbiology and Molecular Genetics, University of Vermont, Burlington, VT 05405, USA
- Corresponding author
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35
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Transcriptional divergence and conservation of human and mouse erythropoiesis. Proc Natl Acad Sci U S A 2014; 111:4103-8. [PMID: 24591581 DOI: 10.1073/pnas.1401598111] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Mouse models have been used extensively for decades and have been instrumental in improving our understanding of mammalian erythropoiesis. Nonetheless, there are several examples of variation between human and mouse erythropoiesis. We performed a comparative global gene expression study using data from morphologically identical stage-matched sorted populations of human and mouse erythroid precursors from early to late erythroblasts. Induction and repression of major transcriptional regulators of erythropoiesis, as well as major erythroid-important proteins, are largely conserved between the species. In contrast, at a global level we identified a significant extent of divergence between the species, both at comparable stages and in the transitions between stages, especially for the 500 most highly expressed genes during development. This suggests that the response of multiple developmentally regulated genes to key erythroid transcriptional regulators represents an important modification that has occurred in the course of erythroid evolution. In developing a systematic framework to understand and study conservation and divergence between human and mouse erythropoiesis, we show how mouse models can fail to mimic specific human diseases and provide predictions for translating findings from mouse models to potential therapies for human disease.
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36
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Eissenberg JC, Sly WS. The Nobel Path of Cellular Proteins. MISSOURI MEDICINE 2014; 111:114-119. [PMID: 30323516 PMCID: PMC6179482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
For one week every October, the world awaits the Nobel Prize announcements. While much publicity is focused on the laureates, the awards in the sciences also recognize high-impact fields of research. The 2013 Nobel Prize in Physiology or Medicine honored three scientists whose research defined the mechanisms by which cellular vesicles sort proteins to their final destinations. This research shaped a modern understanding of how protein sorting controls cellular identity and function.
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Affiliation(s)
- Joel C Eissenberg
- Joel C. Eissenberg, PhD, is a Professor and Associate Dean for Research, and William S. Sly, MD, is a Professor and the James B. and Joan C. Peter Endowed Chair in Biochemistry & Molecular Biology, Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine
| | - William S Sly
- Joel C. Eissenberg, PhD, is a Professor and Associate Dean for Research, and William S. Sly, MD, is a Professor and the James B. and Joan C. Peter Endowed Chair in Biochemistry & Molecular Biology, Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine
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37
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Schmiesing J, Schlüter H, Ullrich K, Braulke T, Mühlhausen C. Interaction of glutaric aciduria type 1-related glutaryl-CoA dehydrogenase with mitochondrial matrix proteins. PLoS One 2014; 9:e87715. [PMID: 24498361 PMCID: PMC3912011 DOI: 10.1371/journal.pone.0087715] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 01/02/2014] [Indexed: 01/15/2023] Open
Abstract
Glutaric aciduria type 1 (GA1) is an inherited neurometabolic disorder caused by mutations in the GCDH gene encoding glutaryl-CoA dehydrogenase (GCDH), which forms homo- and heteromeric complexes in the mitochondrial matrix. GA1 patients are prone to the development of encephalopathic crises which lead to an irreversible disabling dystonic movement disorder. The clinical and biochemical manifestations of GA1 vary considerably and lack correlations to the genotype. Using an affinity chromatography approach we report here for the first time on the identification of mitochondrial proteins interacting directly with GCDH. Among others, dihydrolipoamide S-succinyltransferase (DLST) involved in the formation of glutaryl-CoA, and the β-subunit of the electron transfer flavoprotein (ETFB) serving as electron acceptor, were identified as GCDH binding partners. We have adapted the yellow fluorescent protein-based fragment complementation assay and visualized the oligomerization of GCDH as well as its direct interaction with DLST and ETFB in mitochondria of living cells. These data suggest that GCDH is a constituent of multimeric mitochondrial dehydrogenase complexes, and the characterization of their interrelated functions may provide new insights into the regulation of lysine oxidation and the pathophysiology of GA1.
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Affiliation(s)
- Jessica Schmiesing
- Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hartmut Schlüter
- Department of Clinical Chemistry, Laboratory for Mass Spectrometric Proteomics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Kurt Ullrich
- Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Braulke
- Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- * E-mail: (TB); (CM)
| | - Chris Mühlhausen
- Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- * E-mail: (TB); (CM)
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38
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Circadian clock-dependent and -independent rhythmic proteomes implement distinct diurnal functions in mouse liver. Proc Natl Acad Sci U S A 2013; 111:167-72. [PMID: 24344304 DOI: 10.1073/pnas.1314066111] [Citation(s) in RCA: 237] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Diurnal oscillations of gene expression controlled by the circadian clock underlie rhythmic physiology across most living organisms. Although such rhythms have been extensively studied at the level of transcription and mRNA accumulation, little is known about the accumulation patterns of proteins. Here, we quantified temporal profiles in the murine hepatic proteome under physiological light-dark conditions using stable isotope labeling by amino acids quantitative MS. Our analysis identified over 5,000 proteins, of which several hundred showed robust diurnal oscillations with peak phases enriched in the morning and during the night and related to core hepatic physiological functions. Combined mathematical modeling of temporal protein and mRNA profiles indicated that proteins accumulate with reduced amplitudes and significant delays, consistent with protein half-life data. Moreover, a group comprising about one-half of the rhythmic proteins showed no corresponding rhythmic mRNAs, indicating significant translational or posttranslational diurnal control. Such rhythms were highly enriched in secreted proteins accumulating tightly during the night. Also, these rhythms persisted in clock-deficient animals subjected to rhythmic feeding, suggesting that food-related entrainment signals influence rhythms in circulating plasma factors.
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39
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Unlu G, Levic DS, Melville DB, Knapik EW. Trafficking mechanisms of extracellular matrix macromolecules: insights from vertebrate development and human diseases. Int J Biochem Cell Biol 2013; 47:57-67. [PMID: 24333299 DOI: 10.1016/j.biocel.2013.11.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Revised: 11/01/2013] [Accepted: 11/10/2013] [Indexed: 12/19/2022]
Abstract
Cellular life depends on protein transport and membrane traffic. In multicellular organisms, membrane traffic is required for extracellular matrix deposition, cell adhesion, growth factor release, and receptor signaling, which are collectively required to integrate the development and physiology of tissues and organs. Understanding the regulatory mechanisms that govern cargo and membrane flow presents a prime challenge in cell biology. Extracellular matrix (ECM) secretion remains poorly understood, although given its essential roles in the regulation of cell migration, differentiation, and survival, ECM secretion mechanisms are likely to be tightly controlled. Recent studies in vertebrate model systems, from fishes to mammals and in human patients, have revealed complex and diverse loss-of-function phenotypes associated with mutations in components of the secretory machinery. A broad spectrum of diseases from skeletal and cardiovascular to neurological deficits have been linked to ECM trafficking. These discoveries have directly challenged the prevailing view of secretion as an essential but monolithic process. Here, we will discuss the latest findings on mechanisms of ECM trafficking in vertebrates.
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Affiliation(s)
- Gokhan Unlu
- Department of Medicine, Division of Genetic Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Daniel S Levic
- Department of Medicine, Division of Genetic Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - David B Melville
- Department of Medicine, Division of Genetic Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Ela W Knapik
- Department of Medicine, Division of Genetic Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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40
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Satchwell TJ, Pellegrin S, Bianchi P, Hawley BR, Gampel A, Mordue KE, Budnik A, Fermo E, Barcellini W, Stephens DJ, van den Akker E, Toye AM. Characteristic phenotypes associated with congenital dyserythropoietic anemia (type II) manifest at different stages of erythropoiesis. Haematologica 2013; 98:1788-96. [PMID: 23935019 DOI: 10.3324/haematol.2013.085522] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Congenital dyserythropoietic anemia type II is an autosomally recessive form of hereditary anemia caused by SEC23B gene mutations. Patients exhibit characteristic phenotypes including multinucleate erythroblasts, erythrocytes with hypoglycosylated membrane proteins and an apparent double plasma membrane. Despite ubiquitous expression of SEC23B, the effects of mutations in this gene are confined to the erythroid lineage and the basis of this erythroid specificity remains to be defined. In addition, little is known regarding the stage at which the disparate phenotypes of this disease manifest during erythropoiesis. We employ an in vitro culture system to monitor the appearance of the defining phenotypes associated with congenital dyserythropoietic anemia type II during terminal differentiation of erythroblasts derived from small volumes of patient peripheral blood. Membrane protein hypoglycosylation was detected by the basophilic stage, preceding the onset of multinuclearity in orthochromatic erythroblasts that occurs coincident with the loss of secretory pathway proteins including SEC23A during erythropoiesis. Endoplasmic reticulum remnants were observed in nascent reticulocytes of both diseased and healthy donor cultures but were lost upon further maturation of normal reticulocytes, implicating a defect of ER clearance during reticulocyte maturation in congenital dyserythropoietic anemia type II. We also demonstrate distinct isoform and species-specific expression profiles of SEC23 during terminal erythroid differentiation and identify a prolonged expression of SEC23A in murine erythropoiesis compared to humans. We propose that SEC23A is able to compensate for the absence of SEC23B in mouse erythroblasts, providing a basis for the absence of phenotype within the erythroid lineage of a recently described SEC23B knockout mouse.
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41
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Zheng C, Zhang B. Combined deficiency of coagulation factors V and VIII: an update. Semin Thromb Hemost 2013; 39:613-20. [PMID: 23852824 DOI: 10.1055/s-0033-1349223] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Combined deficiency of factor V (FV) and FVIII (F5F8D) is an autosomal recessive bleeding disorder characterized by simultaneous decreases of both coagulation factors. This review summarizes recent reports on the clinical presentations, treatments, and molecular mechanism of F5F8D. Genetic studies identified LMAN1 and MCFD2 as causative genes for this disorder, revealing a previously unknown intracellular transport pathway shared by the two important blood coagulation factors. LMAN1 and MCFD2 form a Ca2+-dependent cargo receptor complex that functions in the transport of FV/FVIII from the endoplasmic reticulum (ER) to the Golgi. Disrupting the LMAN1-MCFD2 receptor, complex formation is the primary molecular defect of missense mutations leading to F5F8D. The EF-hand domains of MCFD2 are necessary and sufficient for the interactions with both LMAN1 and FV/FVIII. Similarly, the carbohydrate recognition domain of LMAN1 contains distinct and separable binding sites for both MCFD2 and FV/FVIII. Therefore, FV and FVIII likely carry duel sorting signals that are separately recognized by LMAN1 and MCFD2 and necessary for the efficient ER-to-Golgi transport. FV and FVIII likely bind LMAN1 through the high-mannose N-linked glycans under the higher Ca2+ conditions in the ER and dissociate in the lower Ca2+ environment of the ER-Golgi intermediate compartment.
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Affiliation(s)
- Chunlei Zheng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA
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42
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Elucidating the role of carbohydrate determinants in regulating hemostasis: insights and opportunities. Blood 2013; 121:3801-10. [DOI: 10.1182/blood-2012-10-415000] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Recent improvement in modern analytical technologies has stimulated an explosive growth in the study of glycobiology. In turn, this has lead to a richer understanding of the crucial role of N- and O-linked carbohydrates in dictating the properties of the proteins to which they are attached and, in particular, their centrality in the control of protein synthesis, longevity, and activity. Given their importance, it is unsurprising that both gross and subtle defects in glycosylation often contribute to human disease pathology. In this review, we discuss the accumulating evidence for the significance of glycosylation in mediating the functions of the plasma glycoproteins involved in hemostasis and thrombosis. In particular, the role of naturally occurring coagulation protein glycoforms and inherited defects in carbohydrate attachment in modulating coagulation is considered. Finally, we describe the therapeutic opportunities presented by new insights into the role of attached carbohydrates in shaping coagulation protein function and the promise of carbohydrate modification in the delivery of novel therapeutic biologics with enhanced functional properties for the treatment of hemostatic disorders.
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43
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Otsu W, Kurooka T, Otsuka Y, Sato K, Inaba M. A new class of endoplasmic reticulum export signal PhiXPhiXPhi for transmembrane proteins and its selective interaction with Sec24C. J Biol Chem 2013; 288:18521-32. [PMID: 23658022 DOI: 10.1074/jbc.m112.443325] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Protein export from the endoplasmic reticulum (ER) depends on the interaction between a signal motif on the cargo and a cargo recognition site on the coatomer protein complex II. A hydrophobic sequence in the N terminus of the bovine anion exchanger 1 (AE1) anion exchanger facilitated the ER export of human AE1Δ11, an ER-retained AE1 mutant, through interaction with a specific Sec24 isoform. The cell surface expression and N-glycan processing of various substitution mutants or chimeras of human and bovine AE1 proteins and their Δ11 mutants in HEK293 cells were examined. The N-terminal sequence (V/L/F)X(I/L)X(M/L), (26)VSIPM(30) in bovine AE1, which is comparable with ΦXΦXΦ, acted as the ER export signal for AE1 and AE1Δ11 (Φ is a hydrophobic amino acid, and X is any amino acid). The AE1-Ly49E chimeric protein possessing the ΦXΦXΦ motif exhibited effective cell surface expression and N-glycan maturation via the coatomer protein complex II pathway, whereas a chimera lacking this motif was retained in the ER. A synthetic polypeptide containing the N terminus of bovine AE1 bound the Sec23A-Sec24C complex through a selective interaction with Sec24C. Co-transfection of Sec24C-AAA, in which the residues (895)LIL(897) (the binding site for another ER export signal motif IXM on Sec24C and Sec24D) were mutated to (895)AAA(897), specifically increased ER retention of the AE1-Ly49E chimera. These findings demonstrate that the ΦXΦXΦ sequence functions as a novel signal motif for the ER export of cargo proteins through an exclusive interaction with Sec24C.
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Affiliation(s)
- Wataru Otsu
- Laboratory of Molecular Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
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44
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Baines AC, Adams EJ, Zhang B, Ginsburg D. Disruption of the Sec24d gene results in early embryonic lethality in the mouse. PLoS One 2013; 8:e61114. [PMID: 23596517 PMCID: PMC3626607 DOI: 10.1371/journal.pone.0061114] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 03/04/2013] [Indexed: 11/19/2022] Open
Abstract
Transport of newly synthesized proteins from the endoplasmic reticulum (ER) to the Golgi is mediated by the coat protein complex COPII. The inner coat of COPII is assembled from heterodimers of SEC23 and SEC24. Though mice with mutations in one of the four Sec24 paralogs, Sec24b, exhibit a neural tube closure defect, deficiency in humans or mice has not yet been described for any of the other Sec24 paralogs. We now report characterization of mice with targeted disruption of Sec24d. Early embryonic lethality is observed in mice completely deficient in SEC24D, while a hypomorphic Sec24d allele permits survival to mid-embryogenesis. Mice haploinsufficient for Sec24d exhibit no phenotypic abnormality. A BAC transgene containing Sec24d rescues the embryonic lethality observed in Sec24d-null mice. These results demonstrate an absolute requirement for SEC24D expression in early mammalian development that is not compensated by the other three Sec24 paralogs. The early embryonic lethality resulting from loss of SEC24D in mice contrasts with the previously reported mild skeletal phenotype of SEC24D deficiency in zebrafish and restricted neural tube phenotype of SEC24B deficiency in mice. Taken together, these observations suggest that the multiple Sec24 paralogs have developed distinct functions over the course of vertebrate evolution.
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Affiliation(s)
- Andrea C. Baines
- Johns Hopkins Bayview Internal Medicine Residency Program, The Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Elizabeth J. Adams
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Bin Zhang
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, United States of America
| | - David Ginsburg
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
- Departments of Internal Medicine, Human Genetics, and Pediatrics and the Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan, United States of America
- * E-mail:
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45
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Chen XW, Wang H, Bajaj K, Zhang P, Meng ZX, Ma D, Bai Y, Liu HH, Adams E, Baines A, Yu G, Sartor MA, Zhang B, Yi Z, Lin J, Young SG, Schekman R, Ginsburg D. SEC24A deficiency lowers plasma cholesterol through reduced PCSK9 secretion. eLife 2013; 2:e00444. [PMID: 23580231 PMCID: PMC3622177 DOI: 10.7554/elife.00444] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 02/19/2013] [Indexed: 12/14/2022] Open
Abstract
The secretory pathway of eukaryotic cells packages cargo proteins into COPII-coated vesicles for transport from the endoplasmic reticulum (ER) to the Golgi. We now report that complete genetic deficiency for the COPII component SEC24A is compatible with normal survival and development in the mouse, despite the fundamental role of SEC24 in COPII vesicle formation and cargo recruitment. However, these animals exhibit markedly reduced plasma cholesterol, with mutations in Apoe and Ldlr epistatic to Sec24a, suggesting a receptor-mediated lipoprotein clearance mechanism. Consistent with these data, hepatic LDLR levels are up-regulated in SEC24A-deficient cells as a consequence of specific dependence of PCSK9, a negative regulator of LDLR, on SEC24A for efficient exit from the ER. Our findings also identify partial overlap in cargo selectivity between SEC24A and SEC24B, suggesting a previously unappreciated heterogeneity in the recruitment of secretory proteins to the COPII vesicles that extends to soluble as well as trans-membrane cargoes. DOI:http://dx.doi.org/10.7554/eLife.00444.001.
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Affiliation(s)
- Xiao-Wei Chen
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - He Wang
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Kanika Bajaj
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Pengcheng Zhang
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Zhuo-Xian Meng
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Danjun Ma
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Wayne State University, Detroit, United States
| | - Yongsheng Bai
- Department of Bioinformatics, University of Michigan, Ann Arbor, United States
| | - Hui-Hui Liu
- Department of Molecular Medicine, Cleveland Clinic, Cleveland, United States
| | - Elizabeth Adams
- Program in Cell and Molecular Biology, University of Michigan, Ann Arbor, United States
| | - Andrea Baines
- Program in Cell and Molecular Biology, University of Michigan, Ann Arbor, United States
| | - Genggeng Yu
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Maureen A Sartor
- Department of Bioinformatics, University of Michigan, Ann Arbor, United States
| | - Bin Zhang
- Department of Molecular Medicine, Cleveland Clinic, Cleveland, United States
| | - Zhengping Yi
- Department of Pharmaceutical Sciences, Wayne State University, Detroit, United States
| | - Jiandie Lin
- Life Sciences Institute, University of Michigan, Ann Arbor, United States
| | - Stephen G Young
- Department of Medicine and Human Genetics, University of California, Los Angeles, Los Angeles, United States
| | - Randy Schekman
- Department of Molecular and Cell Biology, Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, United States
| | - David Ginsburg
- Division of Molecular Medicine & Genetics, Howard Hughes Medical Institute, University of Michigan, Ann Arbor, United States
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