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Yang Y, Song R, Gao Y, Yu H, Wang S. Regulatory mechanisms and therapeutic potential of JAB1 in neurological development and disorders. Mol Med 2023; 29:80. [PMID: 37365502 DOI: 10.1186/s10020-023-00675-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 05/30/2023] [Indexed: 06/28/2023] Open
Abstract
c-Jun activation domain binding protein-1 (JAB1) is a multifunctional regulator that plays vital roles in diverse cellular processes. It regulates AP-1 transcriptional activity and also acts as the fifth component of the COP9 signalosome complex. While JAB1 is considered an oncoprotein that triggers tumor development, recent studies have shown that it also functions in neurological development and disorders. In this review, we summarize the general features of the JAB1 gene and protein, and present recent updates on the regulation of JAB1 expression. Moreover, we also highlight the functional roles and regulatory mechanisms of JAB1 in neurodevelopmental processes such as neuronal differentiation, synaptic morphogenesis, myelination, and hair cell development and in the pathogenesis of some neurological disorders such as Alzheimer's disease, multiple sclerosis, neuropathic pain, and peripheral nerve injury. Furthermore, current challenges and prospects are discussed, including updates on drug development targeting JAB1.
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Affiliation(s)
- Yu Yang
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China
| | - Ruying Song
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China
| | - Yiming Gao
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China
| | - Hao Yu
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China.
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China.
| | - Shuai Wang
- Department of Psychiatry, Jining Medical University, Jianshe South Road No. 45, Jining, Shandong, China.
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Jining Medical University, Jining, Shandong, China.
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Rao F, Lin H, Su Y. Cullin-RING Ligase Regulation by the COP9 Signalosome: Structural Mechanisms and New Physiologic Players. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1217:47-60. [PMID: 31898221 DOI: 10.1007/978-981-15-1025-0_4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The Cullin-RING E3 ligases (CRLs) are major ubiquitylation machineries regulated by reversible cycles of neddylation and deneddylation. The deneddylase COP9 Signalosome (CSN) terminates CRL catalytic cycle. CSN also provides a docking platform for several kinases and deubiquitinases that might play a role in regulating CRL. Recently, remarkable progress has been made in elucidating the biochemical principles and physiological implications of such exquisite regulation. The cryo-EM structures of CRL-CSN complexes provide the biochemical basis of their cognate interactions and reveal potential regulatory mechanisms during complex disassembly. Moreover, novel players beyond the canonical eight subunits of CSN were identified. This includes CSNAP, a potential 9th CSN subunit with regulatory functions, and the metabolite inositol hexakisphosphate (IP6), which enhances CRL-CSN complex formation, with IP6-metabolizing enzymes possibly instilling dynamics to the CRL-CSN system. Here, we review and summarize these new mechanistic insights along with progress in understanding CSN biology based on model organisms with genetically edited CSN subunits.
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Affiliation(s)
- Feng Rao
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, Guangdong, China.
| | - Hong Lin
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Yang Su
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, Guangdong, China
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Gaspar L, Howald C, Popadin K, Maier B, Mauvoisin D, Moriggi E, Gutierrez-Arcelus M, Falconnet E, Borel C, Kunz D, Kramer A, Gachon F, Dermitzakis ET, Antonarakis SE, Brown SA. The genomic landscape of human cellular circadian variation points to a novel role for the signalosome. eLife 2017; 6:e24994. [PMID: 28869038 PMCID: PMC5601996 DOI: 10.7554/elife.24994] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 09/01/2017] [Indexed: 11/18/2022] Open
Abstract
The importance of natural gene expression variation for human behavior is undisputed, but its impact on circadian physiology remains mostly unexplored. Using umbilical cord fibroblasts, we have determined by genome-wide association how common genetic variation impacts upon cellular circadian function. Gene set enrichment points to differences in protein catabolism as one major source of clock variation in humans. The two most significant alleles regulated expression of COPS7B, a subunit of the COP9 signalosome. We further show that the signalosome complex is imported into the nucleus in timed fashion to stabilize the essential circadian protein BMAL1, a novel mechanism to oppose its proteasome-mediated degradation. Thus, circadian clock properties depend in part upon a genetically-encoded competition between stabilizing and destabilizing forces, and genetic alterations in these mechanisms provide one explanation for human chronotype.
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Affiliation(s)
- Ludmila Gaspar
- Institute of Pharmacology and ToxicologyUniversity of ZurichZurichSwitzerland
| | - Cedric Howald
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Konstantin Popadin
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
| | - Bert Maier
- Charité–UniversitätsmedizinLaboratory of ChronobiologyBerlinGermany
| | - Daniel Mauvoisin
- Department of Pharmacology and ToxicologyUniversity of LausanneLausanneSwitzerland
| | - Ermanno Moriggi
- Institute of Pharmacology and ToxicologyUniversity of ZurichZurichSwitzerland
| | - Maria Gutierrez-Arcelus
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Emilie Falconnet
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Christelle Borel
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Dieter Kunz
- Institute of Physiology, Charité-Universitätsmedizin Berlin, Working Group Sleep Research & Clinical ChronobiologyBerlinGermany
| | - Achim Kramer
- Charité–UniversitätsmedizinLaboratory of ChronobiologyBerlinGermany
| | - Frederic Gachon
- Department of Pharmacology and ToxicologyUniversity of LausanneLausanneSwitzerland
| | - Emmanouil T Dermitzakis
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Stylianos E Antonarakis
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Steven A Brown
- Institute of Pharmacology and ToxicologyUniversity of ZurichZurichSwitzerland
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Su H, Li J, Osinska H, Li F, Robbins J, Liu J, Wei N, Wang X. The COP9 signalosome is required for autophagy, proteasome-mediated proteolysis, and cardiomyocyte survival in adult mice. Circ Heart Fail 2013; 6:1049-57. [PMID: 23873473 DOI: 10.1161/circheartfailure.113.000338] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The COP9 signalosome (CSN) is an evolutionarily conserved protein complex composed of 8 unique protein subunits (CSN1 through CSN8). We have recently discovered in perinatal mouse hearts that CSN regulates not only proteasome-mediated proteolysis but also macroautophagy. However, the physiological significance of CSN in a post-mitotic organ of adult vertebrates has not been determined. We sought to study the physiological role of CSN8/CSN in adult mouse hearts. METHODS AND RESULTS Csn8 was conditionally ablated in the cardiomyocytes of adult mice (CSN8(CKO)) using a temporally controlled Cre-LoxP system. Loss of CSN8 accumulated the neddylated forms of cullins and noncullin proteins, increased ubiquitinated proteins, and stabilized a surrogate substrate of the proteasome in the heart. Autophagic flux was significantly decreased, whereas autophagosomes were markedly increased in CSN8(CKO) hearts, indicative of impaired autophagosome removal. Furthermore, we observed increased oxidized proteins, massive necrotic cardiomyocytes, and morphological and functional changes characteristic of dilated cardiomyopathy in CSN8(CKO) mice. CONCLUSIONS CSN deneddylates substrates more than cullins and is indispensable to cardiomyocyte survival in not only perinatal hearts but also adult hearts. CSN8/CSN regulates both proteasome-mediated proteolysis and the autophagic-lysosomal pathway, critical to the removal of oxidized proteins in the heart.
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Affiliation(s)
- Huabo Su
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, SD
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