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Kuchitsu Y, Taguchi T. Lysosomal microautophagy: an emerging dimension in mammalian autophagy. Trends Cell Biol 2023:S0962-8924(23)00238-6. [PMID: 38104013 DOI: 10.1016/j.tcb.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 12/19/2023]
Abstract
Autophagy is a self-catabolic process through which cellular components are delivered to lysosomes for degradation. There are three types of autophagy, i.e., macroautophagy, chaperone-mediated autophagy (CMA), and microautophagy. In macroautophagy, a portion of the cytoplasm is wrapped by the autophagosome, which then fuses with lysosomes and delivers the engulfed cytoplasm for degradation. In CMA, the translocation of cytosolic substrates to the lysosomal lumen is directly across the limiting membrane of lysosomes. In microautophagy, lytic organelles, including endosomes or lysosomes, take up a portion of the cytoplasm directly. Although macroautophagy has been investigated extensively, microautophagy has received much less attention. Nonetheless, it has become evident that microautophagy plays a variety of cellular roles from yeast to mammals. Here we review the very recent updates of microautophagy. In particular, we focus on the feature of the degradative substrates and the molecular machinery that mediates microautophagy.
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Affiliation(s)
- Yoshihiko Kuchitsu
- Laboratory of Organelle Pathophysiology, Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
| | - Tomohiko Taguchi
- Laboratory of Organelle Pathophysiology, Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
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2
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Ying S, Liu L, Luo C, Liu Y, Zhao C, Ge W, Wu N, Ruan Y, Wang W, Zhang J, Qiu W, Wang Y. Sublytic C5b-9 induces TIMP3 expression by glomerular mesangial cells via TRAF6-dependent KLF5 K63-linked ubiquitination in rat Thy-1 nephritis. Int Immunopharmacol 2023; 124:110970. [PMID: 37748221 DOI: 10.1016/j.intimp.2023.110970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/07/2023] [Accepted: 09/18/2023] [Indexed: 09/27/2023]
Abstract
Rat Thy-1 nephritis (Thy-1N) is an experimental model for studying human mesangioproliferative glomerulonephritis (MsPGN), and its pathological features are glomerular mesangial cell (GMC) proliferation and extracellular matrix (ECM) accumulation. Although we have confirmed that renal lesions of Thy-1N rats are sublytic C5b-9-dependent, and ECM accumulation is related to tissue inhibitor of matrix metalloproteinase (TIMP) inhibiting matrix metalloproteinase (MMP) activity, whether sublytic C5b-9 can induce TIMP production by GMC in Thy-1N rat and the underlying mechanism remains unclear. In the study, we proved that the expressions of TIMP3, krϋppel-like transcription factor 5 (KLF5) and tumor necrosis factor receptor-associated factor 6 (TRAF6) were simultaneously up-regulated both in the renal tissues of Thy-1N rats (in vivo) and in the GMC exposed to sublytic C5b-9 (in vitro). Further mechanism exploration discovered that KLF5 and TRAF6 as two upstream molecules could induce TIMP3 gene transcription through binding to the same region i.e., -1801nt to -1554nt (GGGGAGGGGC) and -228nt to -46nt (GCCCCGCCCC) of TIMP3 promoter. In the process, TRAF6 mediated KLF5 K63-linked ubiquitination at K99 and K100 enhancing KLF5 nuclear localization and binding to TIMP3 promoter, augmenting its gene activation. Furthermore, the experiments in vivo exhibited that silencing KLF5, TRAF6 or TIMP3 gene could markedly lessen renal KLF5 K63-linked ubiquitination or TIMP3 induction, ECM accumulation and other pathological changes of Thy-1N rats. Besides, the positive expressions of above-mentioned these proteins and ECM accumulation and their correlation in the renal tissues of MsPGN patients were also demonstrated. Overall, our findings implicate that KLF5 and TRAF6 play a promoting role in sublytic C5b-9-triggered TIMP3 gene transcription and expression, which might provide a novel mechanistic insight into rat Thy-1N and human MsPGN.
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Affiliation(s)
- Shuai Ying
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China
| | - Longfei Liu
- Department of Central Laboratory, The Affiliated Huaian No. 1 People's Hospital, Nanjing Medical University, Huai'an, China
| | - Can Luo
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China
| | - Yu Liu
- Department of Microbiology and Immunology, Jiangsu Health Vocational College, Nanjing, China
| | - Chenhui Zhao
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Wen Ge
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China
| | - Ningxia Wu
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China
| | - Yuting Ruan
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China
| | - Weiming Wang
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China
| | - Jing Zhang
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China; Key Laboratory of Antibody Technology of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Wen Qiu
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China; Key Laboratory of Antibody Technology of Ministry of Health, Nanjing Medical University, Nanjing, China.
| | - Yingwei Wang
- Department of Immunology, and Key Laboratory of Immunological Environment and Disease, Nanjing Medical University, Nanjing, China; Key Laboratory of Antibody Technology of Ministry of Health, Nanjing Medical University, Nanjing, China.
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Tan SY, Jiang JX, Huang HX, Mo XP, Feng JR, Chen Y, Yang L, Long C. Neural mechanism underlies CYLD modulation of morphology and synaptic function of medium spiny neurons in dorsolateral striatum. Front Mol Neurosci 2023; 16:1107355. [PMID: 36846565 PMCID: PMC9945542 DOI: 10.3389/fnmol.2023.1107355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 01/17/2023] [Indexed: 02/11/2023] Open
Abstract
Although the deubiquitinase cylindromatosis (CYLD), an abundant protein in the postsynaptic density fraction, plays a crucial role in mediating the synaptic activity of the striatum, the precise molecular mechanism remains largely unclear. Here, using a Cyld-knockout mouse model, we demonstrate that CYLD regulates dorsolateral striatum (DLS) neuronal morphology, firing activity, excitatory synaptic transmission, and plasticity of striatal medium spiny neurons via, likely, interaction with glutamate receptor 1 (GluA1) and glutamate receptor 2 (GluA2), two key subunits of alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors (AMPARs). CYLD deficiency reduces levels of GluA1 and GluA2 surface protein and increases K63-linked ubiquitination, resulting in functional impairments both in AMPAR-mediated excitatory postsynaptic currents and in AMPAR-dependent long-term depression. The results demonstrate a functional association of CYLD with AMPAR activity, which strengthens our understanding of the role of CYLD in striatal neuronal activity.
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Affiliation(s)
- Shu-Yi Tan
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Jin-Xiang Jiang
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Hui-Xian Huang
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Xiu-Ping Mo
- School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Jing-Ru Feng
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Yu Chen
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Li Yang
- School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Cheng Long
- School of Life Sciences, South China Normal University, Guangzhou, China.,South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Panyu Central Hospital, Guangzhou, China
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Tan SY, Jiang JX, Huang HX, Mo XP, Feng JR, Chen Y, Yang L, Long C. Corrigendum: Neural mechanism underlies CYLD modulation of morphology and synaptic function of medium spiny neurons in dorsolateral striatum. Front Mol Neurosci 2023; 16:1162275. [PMID: 36910265 PMCID: PMC9996285 DOI: 10.3389/fnmol.2023.1162275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 02/13/2023] [Indexed: 02/25/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fnmol.2023.1107355.].
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Affiliation(s)
- Shu-Yi Tan
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Jin-Xiang Jiang
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Hui-Xian Huang
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Xiu-Ping Mo
- School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Jing-Ru Feng
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Yu Chen
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Li Yang
- School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Cheng Long
- School of Life Sciences, South China Normal University, Guangzhou, China.,South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Panyu Central Hospital, Guangzhou, China
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Hui X, Cao L, Xu T, Zhao L, Huang K, Zou Z, Ren P, Mao H, Yang Y, Gao S, Sun X, Lin X, Jin M. PSMD12-Mediated M1 Ubiquitination of Influenza A Virus at K102 Regulates Viral Replication. J Virol 2022;:e0078622. [PMID: 35861516 DOI: 10.1128/jvi.00786-22] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The M1 of influenza A virus (IAV) is important for the virus life cycle, especially for the assembly and budding of viruses, which is a multistep process that requires host factors. Identifying novel host proteins that interact with M1 and understanding their functions in IAV replication are of great interest in antiviral drug development. In this study, we identified 19 host proteins in DF1 cells suspected to interact with the M1 protein of an H5N6 virus through immunoprecipitation (IP)/mass spectrometry. Among them, PSMD12, a 26S proteasome regulatory subunit, was shown to interact with influenza M1, acting as a positive host factor in IAV replication in avian and human cells. The data showed that PSMD12 promoted K63-linked ubiquitination of M1 at the K102 site. H5N6 and PR8 with an M1-K102 site mutant displayed a significantly weaker replication ability than the wild-type viruses. Mechanistically, PSMD12 promoted M1-M2 virus-like particle (VLP) release, and an M1-K102 mutation disrupted the formation of supernatant M1-M2 VLPs. An H5N6 M1-K102 site mutation or knockdown PSMD12 disrupted the budding release of the virus in chicken embryo fibroblast (CEF) cells, which was confirmed by transmission electron microscopy. Further study confirmed that M1-K102 site mutation significantly affected the virulence of H5N6 and PR8 viruses in mice. In conclusion, we report the novel host factor PSMD12 which affects the replication of influenza virus by mediating K63-linked ubiquitination of M1 at K102. These findings provide novel insight into the interactions between IAV and host cells, while suggesting an important target for anti-influenza virus drug research. IMPORTANCE M1 is proposed to play multiple biologically important roles in the life cycle of IAV, which relies largely on host factors. This study is the first one to identify that PSMD12 interacts with M1, mediates K63-linked ubiquitination of M1 at the K102 site, and thus positively regulates influenza virus proliferation. PSMD12 promoted M1-M2 VLP egress, and an M1-K102 mutation affected the M1-M2 VLP formation. Furthermore, we demonstrate the importance of this site to the morphology and budding of influenza viruses by obtaining mutant viruses, and the M1 ubiquitination regulator PSMD12 has a similar function to the M1 K102 mutation in regulating virus release and virus morphology. Additionally, we confirm the reduced virulence of H5N6 and PR8 (H1N1) viruses carrying the M1-K102 site mutation in mice. These findings provide novel insights into IAV interactions with host cells and suggest a valid and highly conserved candidate target for antiviral drug development.
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Simões V, Cizubu BK, Harley L, Zhou Y, Pajak J, Snyder NA, Bouvette J, Borgnia MJ, Arya G, Bartesaghi A, Silva GM. Redox-sensitive E2 Rad6 controls cellular response to oxidative stress via K63-linked ubiquitination of ribosomes. Cell Rep 2022; 39:110860. [PMID: 35613580 PMCID: PMC9215706 DOI: 10.1016/j.celrep.2022.110860] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 03/31/2022] [Accepted: 05/02/2022] [Indexed: 01/11/2023] Open
Abstract
Protein ubiquitination is an essential process that rapidly regulates protein synthesis, function, and fate in dynamic environments. Within its non-proteolytic functions, we showed that K63-linked polyubiquitinated conjugates heavily accumulate in yeast cells exposed to oxidative stress, stalling ribosomes at elongation. K63-ubiquitinated conjugates accumulate mostly because of redox inhibition of the deubiquitinating enzyme Ubp2; however, the role and regulation of ubiquitin-conjugating enzymes (E2) in this pathway remained unclear. Here, we show that the E2 Rad6 associates and modifies ribosomes during stress. We further demonstrate that Rad6 and its human homolog UBE2A are redox regulated by forming a reversible disulfide with the E1 ubiquitin-activating enzyme (Uba1). This redox regulation is part of a negative feedback regulation, which controls the levels of K63 ubiquitination under stress. Finally, we show that Rad6 activity is necessary to regulate translation, antioxidant defense, and adaptation to stress, thus providing an additional physiological role for this multifunctional enzyme.
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Affiliation(s)
- Vanessa Simões
- Department of Biology, Duke University, Durham, NC 27708, USA
| | | | - Lana Harley
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Ye Zhou
- Department of Computer Science, Department of Biochemistry, and Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA
| | - Joshua Pajak
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Nathan A Snyder
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Jonathan Bouvette
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Durham, NC 27709, USA
| | - Mario J Borgnia
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Durham, NC 27709, USA
| | - Gaurav Arya
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Alberto Bartesaghi
- Department of Computer Science, Department of Biochemistry, and Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA
| | - Gustavo M Silva
- Department of Biology, Duke University, Durham, NC 27708, USA.
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Shao Y, Wang Z, Chen K, Li D, Lv Z, Zhang C, Zhang W, Li C. Xenophagy of invasive bacteria is differentially activated and modulated via a TLR-TRAF6-Beclin1 axis in echinoderms. J Biol Chem 2022; 298:101667. [PMID: 35120925 PMCID: PMC8902612 DOI: 10.1016/j.jbc.2022.101667] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/13/2022] [Accepted: 01/18/2022] [Indexed: 11/16/2022] Open
Abstract
In marine environments, organisms are confronted with numerous microbial challenges, although the differential regulation of xenophagy in response to different pathogenic bacterial species remains relatively unknown. Here, we addressed this issue using Apostichopus japonicus as a model. We identified 39 conserved autophagy-related genes by genome-wide screening, which provided a molecular basis for autophagy regulation in sea cucumbers. Furthermore, xenophagy of two Gram-negative bacteria, Vibrio splendidus and Escherichia coli, but not a Gram-positive bacteria, Micrococcus luteus, was observed in different autophagy assays. Surprisingly, a significantly higher autophagy capacity was found in the E. coli–challenged group than in the V. splendidus–challenged group. To confirm these findings, two different lipopolysaccharides, LPSV. splendidus and LPSE. coli, were isolated; we found that these LPS species differentially activated coelomocyte xenophagy. To explore the molecular mechanism mediating differential levels of xenophagy, we used an siRNA knockdown assay and confirmed that LPSV. splendidus-mediated xenophagy was dependent on an AjTLR3-mediated pathway, whereas LPSE. coli-mediated xenophagy was dependent on AjToll. Moreover, the activation of different AjTLRs resulted in AjTRAF6 ubiquitination and subsequent activation of K63-linked ubiquitination of AjBeclin1. Inversely, the LPSV. splendidus-induced AjTLR3 pathway simultaneously activated the expression of AjA20, which reduced the extent of K63-linked ubiquitination of AjBeclin1 and impaired the induction of autophagy; however, this finding was no t evident with LPSE. coli. Our present results provide the first evidence showing that xenophagy could be differentially induced by different bacterial species to yield differential autophagy levels in echinoderms.
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Affiliation(s)
- Yina Shao
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China
| | - Zhenhui Wang
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China
| | - Kaiyu Chen
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China
| | - Dongdong Li
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China
| | - Zhimeng Lv
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China
| | - Chundan Zhang
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China
| | - Weiwei Zhang
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China
| | - Chenghua Li
- State Key Laboratory for Quality and Safety of Agro-products, Ningbo University, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, PR China; State-Province Joint Laboratory of Marine Biotechnology and Engineering, Ningbo University, Ningbo 315211, China.
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8
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Cao H, Li Y, Chen L, Lu Z, You T, Wang X, Ji B. Tripartite motif-containing 54 promotes gastric cancer progression by upregulating K63-linked ubiquitination of filamin C. Asia Pac J Clin Oncol 2022; 18:669-677. [PMID: 35098666 DOI: 10.1111/ajco.13747] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 12/04/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Tripartite motif (TRIM) proteins have been proved to contribute to cancer progression, while whether tripartite motif-containing 54 (TRIM54) could functionally influence gastric cancer (GC) progression remains elusive. METHODS The expression level of TRIM54 and filamin C (FLNC) in GC was determined by Western blot and online database. Cell Counting Kit-8 (CCK-8) assay, colony formation assay and Ethylenediurea (EdU) staining were performed to explore the effects of TRIM54 on GC cell proliferation. Transwell assay and wound healing assay were applied to detect the influence of TRIM54 on GC cell migration and invasion. Bioinformatics analysis and Co-immunoprecipitation assay (Co-Ip), Ubiquitination assay and Half-life assay were involved to explore the regulatory mechanism of TRIM54 on FLNC. RESULTS TRIM54 was upregulated in GC tissues and cells, and a higher expression level of TRIM54 indicated a shorter overall survival of GC patients. The overexpression of TRIM54 significantly enhanced proliferation, migration, and invasion of GC cells, and inhibition of TRIM54 expression exerted reverse effects on GC cells. Mechanistically, TRIM54 was determined as a post-translational mediator of FLNC, and TRIM54 was co-immunoprecipitated with FLNC and degraded its protein level via K63-linked ubiquitination of FLNC. Notably, FLNC efficiently inhibited GC progression by TRIM54 overexpression. CONCLUSION Collectively, our findings suggested that the TRIM54/FLNC axis could be considered as a potential prognostic biomarker for GC.
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Affiliation(s)
- Hongtao Cao
- Department of Gastrointestinal Surgery, Huadu District People's Hospital, Southern Medical University, Guangzhou, China
| | - Ye Li
- Department of Radiotherapy, The Fifth People's Hospital of Qinghai Province, Xining, China
| | - Liang Chen
- Department of Gastrointestinal Surgery, Huadu District People's Hospital, Southern Medical University, Guangzhou, China
| | - Zhuocai Lu
- Department of Gastrointestinal Surgery, Huadu District People's Hospital, Southern Medical University, Guangzhou, China
| | - Tian You
- Department of Gastrointestinal Surgery, Huadu District People's Hospital, Southern Medical University, Guangzhou, China
| | - Xiaolong Wang
- Department of Gastrointestinal Surgery, Huadu District People's Hospital, Southern Medical University, Guangzhou, China
| | - Baoyan Ji
- Department of Oncology, Qinghai Provincial People's Hospital, Xining, China
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Abstract
Ubc13-catalyzed K63 ubiquitination is a major control point for immune signaling. Recent evidence has shown that the control of multiple immune functions, including chronic inflammation, pathogen responses, lymphocyte activation, and regulatory signaling, is altered by K63 ubiquitination. In this review, we detail the novel cellular sensors that are dependent on K63 ubiquitination for their function in the immune signaling network. Many pathogens, including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), can target K63 ubiquitination to inhibit pathogen immune responses; we describe novel details of the pathways involved and summarize recent clinically relevant SARS-CoV-2-specific responses. We also discuss recent evidence that regulatory T cell (Treg) versus T helper (TH) 1 and TH17 cell subset regulation might involve K63 ubiquitination. Knowledge gaps that merit future investigation and clinically relevant pathways are also addressed.
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Affiliation(s)
| | - Jeffrey P Novack
- Pacific Northwest University of Health Sciences, Yakima, WA, USA
| | - John C Reed
- Sanofi, Paris, France & University of Miami, Sylvester Comprehensive Cancer Center, Miami, FL, USA.
| | - Shu-Ichi Matsuzawa
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
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10
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Yao D, Arguez MA, He P, Bent AF, Song J. Coordinated regulation of plant immunity by poly(ADP-ribosyl)ation and K63-linked ubiquitination. Mol Plant 2021; 14:2088-2103. [PMID: 34418551 PMCID: PMC9070964 DOI: 10.1016/j.molp.2021.08.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 05/24/2021] [Accepted: 08/15/2021] [Indexed: 05/02/2023]
Abstract
Poly(ADP-ribosyl)ation (PARylation) is a posttranslational modification reversibly catalyzed by poly(ADP-ribose) polymerases (PARPs) and poly(ADP-ribose) glycohydrolases (PARGs) and plays a key role in multiple cellular processes. The molecular mechanisms by which PARylation regulates innate immunity remain largely unknown in eukaryotes. Here we show that Arabidopsis UBC13A and UBC13B, the major drivers of lysine 63 (K63)-linked polyubiquitination, directly interact with PARPs/PARGs. Activation of pathogen-associated molecular pattern (PAMP)-triggered immunity promotes these interactions and enhances PARylation of UBC13. Both parp1 parp2 and ubc13a ubc13b mutants are compromised in immune responses with increased accumulation of total pathogenesis-related (PR) proteins but decreased accumulation of secreted PR proteins. Protein disulfide-isomerases (PDIs), essential components of endoplasmic reticulum quality control (ERQC) that ensure proper folding and maturation of proteins destined for secretion, complex with PARPs/PARGs and are PARylated upon PAMP perception. Significantly, PARylation of UBC13 regulates K63-linked ubiquitination of PDIs, which may further promote their disulfide isomerase activities for correct protein folding and subsequent secretion. Taken together, these results indicate that plant immunity is coordinately regulated by PARylation and K63-linked ubiquitination.
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Affiliation(s)
- Dongsheng Yao
- Texas A&M AgriLife Research Center at Dallas, Texas A&M University System, Dallas, TX 75252, USA
| | - Marcus A Arguez
- Texas A&M AgriLife Research Center at Dallas, Texas A&M University System, Dallas, TX 75252, USA
| | - Ping He
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Andrew F Bent
- Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Junqi Song
- Texas A&M AgriLife Research Center at Dallas, Texas A&M University System, Dallas, TX 75252, USA; Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843, USA.
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11
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Zhu Y, Cai Q, Zheng X, Liu L, Hua Y, Du B, Zhao G, Yu J, Zhuo Z, Xie Z, Ji S. Aspirin Positively Contributes to Drosophila Intestinal Homeostasis and Delays Aging through Targeting Imd. Aging Dis 2021; 12:1821-1834. [PMID: 34631223 PMCID: PMC8460307 DOI: 10.14336/ad.2020.1008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 10/08/2020] [Indexed: 11/18/2022] Open
Abstract
The intestine, a high-turnover tissue, plays a critical role in regulating aging and health in both vertebrates and invertebrates. Maintaining the epithelial barrier function of the intestine by preserving innate immune homeostasis significantly delays aging and prevents mortality. In an effort to explore effective chemicals and materials that can improve intestinal integrity, we performed a nonbiased screen utilizing Drosophila as an animal model. We showed that long-term uptake of aspirin markedly prevented age-onset gut leakage, the over-proliferation of intestinal stem cells, and the dysbiosis of commensal microbiota in fruit flies. Mechanistically, aspirin efficiently downregulated chronic activation of intestinal immune deficiency signaling during aging. Furthermore, our in vivo and in vitro biochemical analyses indicated that aspirin is a negative modulator in control of the K63-linked ubiquitination of Imd. Our findings uncover a novel regulatory mechanism by which aspirin positively modulates intestinal homeostasis, thus delaying aging, in Drosophila.
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Affiliation(s)
- Yangyang Zhu
- 1Centre for Developmental Biology, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Qingshuang Cai
- 2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Xianrui Zheng
- 3Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, Fujian 363000, China
| | - Lei Liu
- 1Centre for Developmental Biology, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Yongzhi Hua
- 1Centre for Developmental Biology, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Beibei Du
- 1Centre for Developmental Biology, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Guomin Zhao
- 1Centre for Developmental Biology, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Jiangliu Yu
- 4School of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Zhao Zhuo
- 5College of Animal Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Zhongwen Xie
- 2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Shanming Ji
- 1Centre for Developmental Biology, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, China
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Chargui A, Belaid A, Ndiaye PD, Imbert V, Samson M, Guigonis JM, Tauc M, Peyron JF, Poujeol P, Brest P, Hofman P, Mograbi B. The Carcinogen Cadmium Activates Lysine 63 (K63)-Linked Ubiquitin-Dependent Signaling and Inhibits Selective Autophagy. Cancers (Basel) 2021; 13:2490. [PMID: 34065348 PMCID: PMC8161291 DOI: 10.3390/cancers13102490] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 05/11/2021] [Indexed: 01/18/2023] Open
Abstract
Signaling, proliferation, and inflammation are dependent on K63-linked ubiquitination-conjugation of a chain of ubiquitin molecules linked via lysine 63. However, very little information is currently available about how K63-linked ubiquitination is subverted in cancer. The present study provides, for the first time, evidence that cadmium (Cd), a widespread environmental carcinogen, is a potent activator of K63-linked ubiquitination, independently of oxidative damage, activation of ubiquitin ligase, or proteasome impairment. We show that Cd induces the formation of protein aggregates that sequester and inactivate cylindromatosis (CYLD) and selective autophagy, two tumor suppressors that deubiquitinate and degrade K63-ubiquitinated proteins, respectively. The aggregates are constituted of substrates of selective autophagy-SQSTM1, K63-ubiquitinated proteins, and mitochondria. These protein aggregates also cluster double-membrane remnants, which suggests an impairment in autophagosome maturation. However, failure to eliminate these selective cargos is not due to alterations in the general autophagy process, as degradation of long-lived proteins occurs normally. We propose that the simultaneous disruption of CYLD and selective autophagy by Cd feeds a vicious cycle that further amplifies K63-linked ubiquitination and downstream activation of the NF-κB pathway, processes that support cancer progression. These novel findings link together impairment of selective autophagy, K63-linked ubiquitination, and carcinogenesis.
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Affiliation(s)
- Abderrahman Chargui
- Université Côte d’Azur, Institute of Research on Cancer and Aging in Nice (IRCAN), Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Fédération Hospitalo-Universitaire (FHU) OncoAge, Centre Antoine Lacassagne, F-06189 Nice, France; (A.C.); (A.B.); (P.D.N.); (P.B.); (P.H.)
- Higher School of Agriculture of Kef, University Jendouba, Le Kef and Laboratory of Histology, Embryology and Cell Biology, Faculty of Medicine Tunis, 7110 Le Kef, Tunisia
| | - Amine Belaid
- Université Côte d’Azur, Institute of Research on Cancer and Aging in Nice (IRCAN), Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Fédération Hospitalo-Universitaire (FHU) OncoAge, Centre Antoine Lacassagne, F-06189 Nice, France; (A.C.); (A.B.); (P.D.N.); (P.B.); (P.H.)
| | - Papa Diogop Ndiaye
- Université Côte d’Azur, Institute of Research on Cancer and Aging in Nice (IRCAN), Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Fédération Hospitalo-Universitaire (FHU) OncoAge, Centre Antoine Lacassagne, F-06189 Nice, France; (A.C.); (A.B.); (P.D.N.); (P.B.); (P.H.)
| | - Véronique Imbert
- Université Côte d’Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), Institut National de la Santé et de la Recherche Médicale (INSERM), F-06204 Nice, France; (V.I.); (J.-F.P.)
| | - Michel Samson
- Université Côte d’Azur, Laboratory Transporter in Imaging and Radiotherapy in Oncology (TIRO), Direction de la Recherche Fondamentale (DRF), Institut des sciences du vivant Fréderic Joliot, Commissariat à l’Energie Atomique et aux énergies alternatives (CEA), F-06107 Nice, France; (M.S.); (J.-M.G.)
| | - Jean-Marie Guigonis
- Université Côte d’Azur, Laboratory Transporter in Imaging and Radiotherapy in Oncology (TIRO), Direction de la Recherche Fondamentale (DRF), Institut des sciences du vivant Fréderic Joliot, Commissariat à l’Energie Atomique et aux énergies alternatives (CEA), F-06107 Nice, France; (M.S.); (J.-M.G.)
| | - Michel Tauc
- Université Côte d’Azur, Laboratoire de Physiomédecine Moléculaire, LP2M, Labex ICST, Centre National de la Recherche Scientifique (CNRS), F-06107 Nice, France; (M.T.); (P.P.)
| | - Jean-François Peyron
- Université Côte d’Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), Institut National de la Santé et de la Recherche Médicale (INSERM), F-06204 Nice, France; (V.I.); (J.-F.P.)
| | - Philippe Poujeol
- Université Côte d’Azur, Laboratoire de Physiomédecine Moléculaire, LP2M, Labex ICST, Centre National de la Recherche Scientifique (CNRS), F-06107 Nice, France; (M.T.); (P.P.)
| | - Patrick Brest
- Université Côte d’Azur, Institute of Research on Cancer and Aging in Nice (IRCAN), Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Fédération Hospitalo-Universitaire (FHU) OncoAge, Centre Antoine Lacassagne, F-06189 Nice, France; (A.C.); (A.B.); (P.D.N.); (P.B.); (P.H.)
| | - Paul Hofman
- Université Côte d’Azur, Institute of Research on Cancer and Aging in Nice (IRCAN), Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Fédération Hospitalo-Universitaire (FHU) OncoAge, Centre Antoine Lacassagne, F-06189 Nice, France; (A.C.); (A.B.); (P.D.N.); (P.B.); (P.H.)
- Université Côte d’Azur, Laboratory of Clinical and Experimental Pathology, FHU OncoAge, Hospital-Integrated Biobank (BB-0033-00025), Centre Hospitalier Universitaire (CHU) de Nice, F-06001 Nice, France
| | - Baharia Mograbi
- Université Côte d’Azur, Institute of Research on Cancer and Aging in Nice (IRCAN), Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Fédération Hospitalo-Universitaire (FHU) OncoAge, Centre Antoine Lacassagne, F-06189 Nice, France; (A.C.); (A.B.); (P.D.N.); (P.B.); (P.H.)
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Sun L, Amraei R, Rahimi N. NEDD4 regulates ubiquitination and stability of the cell adhesion molecule IGPR-1 via lysosomal pathway. J Biomed Sci 2021; 28:35. [PMID: 33962630 PMCID: PMC8103646 DOI: 10.1186/s12929-021-00731-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 04/28/2021] [Indexed: 11/10/2022] Open
Abstract
Background The cell adhesion molecule IGPR-1 regulates various critical cellular processes including, cell–cell adhesion, mechanosensing and autophagy and plays important roles in angiogenesis and tumor growth; however, the molecular mechanism governing the cell surface levels of IGPR-1 remains unknown. Results In the present study, we used an in vitro ubiquitination assay and identified ubiquitin E3 ligase NEDD4 and the ubiquitin conjugating enzyme UbcH6 involved in the ubiquitination of IGPR-1. In vitro GST-pulldown and in vivo co-immunoprecipitation assays demonstrated that NEDD4 binds to IGPR-1. Over-expression of wild-type NEDD4 downregulated IGPR-1 and deletion of WW domains (1–4) of NEDD4 revoked its effects on IGPR-1. Knockdown of NEDD4 increased IGPR-1 levels in A375 melanoma cells. Deletion of 57 amino acids encompassing the polyproline rich (PPR) motifs on the C-terminus of IGPR-1 nullified its binding with NEDD4. Furthermore, we demonstrate that NEDD4 promotes K48- and K63-dependent polyubiquitination of IGPR-1. The NEDD4-mediated polyubiquitination of IGPR-1 stimulates lysosomal-dependent degradation of IGPR-1 as the treatment of cells with the lysosomal inhibitors, bafilomycine or ammonium chloride increased IGPR-1 levels ectopically expressed in HEK-293 cells and in multiple endogenously IGPR-1 expressing human skin melanoma cell lines. Conclusions NEDD4 ubiquitin E3 ligase binds to and mediates polyubiquitination of IGPR-1 leading to its lysosomal-dependent degradation. NEDD4 is a key regulator of IGPR-1 expression with implication in the therapeutic targeting of IGPR-1 in human cancers. Supplementary Information The online version contains supplementary material available at 10.1186/s12929-021-00731-9.
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Affiliation(s)
- Linzi Sun
- Department of Pathology, School of Medicine, Boston University Medical Campus, 670 Albany Street, Boston, MA, 02118, USA
| | - Razie Amraei
- Department of Pathology, School of Medicine, Boston University Medical Campus, 670 Albany Street, Boston, MA, 02118, USA
| | - Nader Rahimi
- Department of Pathology, School of Medicine, Boston University Medical Campus, 670 Albany Street, Boston, MA, 02118, USA.
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14
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Zhu L, Nie L, Xie S, Li M, Zhu C, Qiu X, Kuang J, Liu C, Lu C, Li W, Meng E, Zhang D, Zhu L. Attenuation of Antiviral Immune Response Caused by Perturbation of TRIM25-Mediated RIG-I Activation under Simulated Microgravity. Cell Rep 2021; 34:108600. [PMID: 33406425 DOI: 10.1016/j.celrep.2020.108600] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 10/20/2020] [Accepted: 12/14/2020] [Indexed: 12/14/2022] Open
Abstract
Microgravity is a major environmental factor of space flight that triggers dysregulation of the immune system and increases clinical risks for deep-space-exploration crews. However, systematic studies and molecular mechanisms of the adverse effects of microgravity on the immune system in animal models are limited. Here, we establish a ground-based zebrafish disease model of microgravity for the research of space immunology. RNA sequencing analysis demonstrates that the retinoic-acid-inducible gene (RIG)-I-like receptor (RLR) and the Toll-like receptor (TLR) signaling pathways are significantly compromised by simulated microgravity (Sμg). TRIM25, an essential E3 for RLR signaling, is inhibited under Sμg, hampering the K63-linked ubiquitination of RIG-I and the following function-induction positive feedback loop of antiviral immune response. These mechanisms provide insights into better understanding of the effects and principles of microgravity on host antiviral immunity and present broad potential implications for developing strategies that can prevent and control viral diseases during space flight.
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Affiliation(s)
- Lvyun Zhu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China.
| | - Li Nie
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Marine Sciences, Ningbo University, Ningbo, P.R. China
| | - Sisi Xie
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Ming Li
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Chushu Zhu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Xinyuan Qiu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Jingyu Kuang
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Chuanyang Liu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Chenyu Lu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Wenying Li
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Er Meng
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Dongyi Zhang
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China
| | - Lingyun Zhu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, Hunan, P.R. China.
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15
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Li ZT, Liu H, Zhang WQ. NLRC3 alleviates hypoxia/reoxygenation induced inflammation in RAW264.7 cells by inhibiting K63-linked ubiquitination of TRAF6. Hepatobiliary Pancreat Dis Int 2020; 19:455-460. [PMID: 32386989 DOI: 10.1016/j.hbpd.2020.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 04/07/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND NOD-like receptor family CARD domain containing 3 (NLRC3) plays an important role in both innate and adaptive immunity. This study was to explore the function and related mechanisms of NLRC3 in a hypoxia/reoxygenation (H/R)-induced inflammatory response in RAW264.7 cells. METHODS Liver ischemia-reperfusion (I/R) model in mice and H/R model in RAW264.7 cells were constructed. Western blotting was used to determine the protein expression level of NLRC3 in liver tissue and NLRC3, TRAF6, p-p65, p65, IκB-α, and the K63-linked ubiquitination level of TRAF6 in cells. The immunofluorescence assay was performed to evaluate the nuclear level of the NF-κB (p65). ELISA was conducted to measure the content of IL-1β in serum and cell supernatant. The interaction between NLRC3 and TRAF6 in cells was analyzed by the Co-IP assay. RESULTS The NLRC3 protein level in liver tissue was decreased with the prolongation of reperfusion time (P < 0.05). The expression of NLRC3 and IκB-α protein in RAW264.7 was decreased gradually, while the expression of p-p65 and TRAF6 proteins and K63-linked ubiquitination of TRAF6 were increased gradually with the prolongation of reoxgenation time (P < 0.05). The Co-IP assay revealed that NLRC3 and TRAF6 can bind to each other directly. However, NLRC3 had no effect on the expression of TRAF6 protein. The ubiquitination test results showed that the K63-linked ubiquitination level of TRAF6 in H/R + Lv-NLRC3 group was significantly lower than that in the H/R + negative control (NC) group (P < 0.05). Moreover, the activation of NF-κB in H/R + Lv-NLRC3 group was inhibited compared with that in the H/R + NC group, and the level of the inflammatory factor IL-1β in the cell culture supernatant was also decreased accordingly (P < 0.05). CONCLUSIONS NLRC3 might alleviate H/R-induced inflammation in RAW264.7 cells by inhibiting K63-linked ubiquitination of TRAF6.
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Affiliation(s)
- Zhong-Tang Li
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Hang Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Wan-Qiu Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
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16
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Zang Y, Gong Y, Wang Q, Guo H, Xiao W. Arabidopsis OTU1, a linkage-specific deubiquitinase, is required for endoplasmic reticulum-associated protein degradation. Plant J 2020; 101:141-155. [PMID: 31491807 DOI: 10.1111/tpj.14524] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 08/09/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Endoplasmic reticulum (ER)-associated degradation (ERAD) is part of the ER protein quality-control system (ERQC), which is critical for the conformation fidelity of most secretory and membrane proteins in eukaryotic organisms. ERAD is thought to operate in plants with core machineries highly conserved to those in human and yeast; however, little is known about the plant ERAD system. Here we report the characterization of a close homolog of human OTUB1 in Arabidopsis thaliana, designated as AtOTU1. AtOTU1 selectively hydrolyzes several types of ubiquitin chains and these activities depend on its conserved protease domain and/or the unique N-terminus. The otu1 null mutant is sensitive to high salinity stress, and particularly agents that cause protein misfolding. It turns out that AtOTU1 is required for the processing of known plant ERAD substrates such as barley powdery mildew O (MLO) alleles by virtue of its association with the CDC48 complex through its N-terminal region. These observations collectively define AtOTU1 as an OTU domain-containing deubiquitinase involved in Arabidopsis ERAD.
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Affiliation(s)
- Yuepeng Zang
- College of Life Sciences, Capital Normal University, Beijing, 100048, China
| | - Yingya Gong
- College of Life Sciences, Capital Normal University, Beijing, 100048, China
| | - Qian Wang
- College of Life Sciences, Capital Normal University, Beijing, 100048, China
| | - Huiping Guo
- College of Life Sciences, Capital Normal University, Beijing, 100048, China
| | - Wei Xiao
- College of Life Sciences, Capital Normal University, Beijing, 100048, China
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
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17
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Li P, Huang P, Li X, Yin D, Ma Z, Wang H, Song H. Tankyrase Mediates K63-Linked Ubiquitination of JNK to Confer Stress Tolerance and Influence Lifespan in Drosophila. Cell Rep 2019; 25:437-448. [PMID: 30304683 DOI: 10.1016/j.celrep.2018.09.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 07/18/2018] [Accepted: 09/12/2018] [Indexed: 01/25/2023] Open
Abstract
Tankyrase (Tnks) transfers poly(ADP-ribose) on substrates. Whereas studies have highlighted the pivotal roles of Tnks in cancer, cherubism, systemic sclerosis, and viral infection, the requirement for Tnks under physiological contexts remains unclear. Here, we report that the loss of Tnks or its muscle-specific knockdown impairs lifespan, stress tolerance, and energy homeostasis in adult Drosophila. We find that Tnks is a positive regulator in the JNK signaling pathway, and modest alterations in the activity of JNK signaling can strengthen or suppress the Tnks mutant phenotypes. We further identify JNK as a direct substrate of Tnks. Although Tnks-dependent poly-ADP-ribosylation is tightly coupled to proteolysis in the proteasome, we demonstrate that Tnks initiates degradation-independent ubiquitination on two lysine residues of JNK to promote its kinase activity and in vivo functions. Our study uncovers a type of posttranslational modification of Tnks substrates and provides insights into Tnks-mediated physiological roles.
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Affiliation(s)
- Ping Li
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China; School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Ping Huang
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiaojiao Li
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China; School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Dingzi Yin
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Zhiwei Ma
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Hui Wang
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Haiyun Song
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, China; School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
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18
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Mai J, Zhong ZY, Guo GF, Chen XX, Xiang YQ, Li X, Zhang HL, Chen YH, Xu XL, Wu RY, Yu Y, Li ZL, Peng XD, Huang Y, Zhou LH, Feng GK, Guo X, Deng R, Zhu XF. Polo-Like Kinase 1 phosphorylates and stabilizes KLF4 to promote tumorigenesis in nasopharyngeal carcinoma. Theranostics 2019; 9:3541-3554. [PMID: 31281496 PMCID: PMC6587166 DOI: 10.7150/thno.32908] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 04/24/2019] [Indexed: 12/11/2022] Open
Abstract
Rationale: Advanced nasopharyngeal carcinoma (NPC) is an aggressive disease with no targeted therapies and poor outcomes. New innovative targets are urgently needed. KLF4 has been extensively studied in the context of tumors, and current data suggest that it can act as either a tissue-specific tumor-inhibiting or a tumor-promoting gene. Here, we found that KLF4 played as a tumor-promoting gene in NPC, and could be mediated by PLK1. Methods: Tissue immunohistochemistry (IHC) assay was performed to identify the role of KLF4 in NPC. Global gene expression experiments were performed to explore the molecular mechanisms underlying KLF4-dependent tumorigenesis. Small-molecule kinase inhibitor screening was performed to identify potential upstream kinases of KLF4. The pharmacologic activity of polo-like kinase inhibitor volasertib (BI6727) in vitro and in vivo was determined. Result: Our investigation showed that high expression of KLF4 was correlated with poor prognosis in NPC. Moreover, genome-wide profiling revealed that KLF4 directly activated oncogenic programmes, including gene sets associated with KRAS, VEGF, and MYC signalling. We further found that inhibition of polo-like kinase 1 could downregulate the expression of KLF4 and that PLK1 directly phosphorylated KLF4 at Ser234. Notably, phosphorylation of KLF4 by PLK1 caused the recruitment and binding of the E3 ligase TRAF6, which resulted in KLF4 K32 K63-linked ubiquitination and stabilization. Moreover, KLF4 could enhance TRAF6 expression at the transcriptional level, thus initiating a KLF4-TRAF6 feed-forward loop. Treatment with the PLK1 inhibitor volasertib (BI6727) significantly inhibited tumor growth in nude mice. Conclusion: Our study unveiled a new PLK1-TRAF6-KLF4 feed-forward loop. The resulting increase in KLF4 ubiquitination leads to stabilization and upregulation of KLF4, which leads to tumorigenesis in NPC. These results expand our understanding of the role of KLF4 in NPC and validate PLK1 inhibitors as potential therapeutic agents for NPC, especially cancer patients with KLF4 overexpression.
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Affiliation(s)
- Jia Mai
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhuo-Yan Zhong
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Gui-Fang Guo
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
- Department of VIP Inpatient, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xiu-Xing Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
- Department of VIP Inpatient, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yan-Qun Xiang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xuan Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Hai-Liang Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yu-Hong Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xue-Lian Xu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Rui-Yan Wu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yan Yu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Zhi-Ling Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xiao-Dan Peng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yun Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Li-Huan Zhou
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Gong-Kan Feng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xiang Guo
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
- Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Rong Deng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xiao-Feng Zhu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
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Chan CH, Jo U, Kohrman A, Rezaeian AH, Chou PC, Logothetis C, Lin HK. Posttranslational regulation of Akt in human cancer. Cell Biosci 2014; 4:59. [PMID: 25309720 DOI: 10.1186/2045-3701-4-59] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 09/04/2014] [Indexed: 12/19/2022] Open
Abstract
Akt regulates critical cellular processes including cell survival and proliferation, glucose metabolism, cell migration, cancer progression and metastasis through phosphorylation of a variety of downstream targets. The Akt pathway is one of the most prevalently hyperactivated signaling pathways in human cancer, thus, research deciphering molecular mechanisms which underlie the aberrant Akt activation has received enormous attention. The PI3K-dependent Akt serine/threonine phosphorylation by PDK1 and mTORC2 has long been thought to be the primary mechanism accounting for Akt activation. However, this regulation alone does not sufficiently explain how Akt hyperactivation can occur in tumors with normal levels of PI3K/PTEN activity. Mounting evidence demonstrates that aberrant Akt activation can be attributed to other posttranslational modifications, which include tyrosine phosphorylation, O-GlcNAcylation, as well as lysine modifications: ubiquitination, SUMOylation and acetylation. Among them, K63-linked ubiquitination has been shown to be a critical step for Akt signal activation by facilitating its membrane recruitment. Deficiency of E3 ligases responsible for growth factor-induced Akt activation leads to tumor suppression. Therefore, a comprehensive understanding of posttranslational modifications in Akt regulation will offer novel strategies for cancer therapy.
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Seo TW, Lee JS, Yoo SJ. Cellular inhibitor of apoptosis protein 1 ubiquitinates endonuclease G but does not affect endonuclease G-mediated cell death. Biochem Biophys Res Commun 2014; 451:644-9. [PMID: 25139236 DOI: 10.1016/j.bbrc.2014.08.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 08/09/2014] [Indexed: 11/30/2022]
Abstract
Inhibitors of Apoptosis Proteins (IAPs) are evolutionarily well conserved and have been recognized as the key negative regulators of apoptosis. Recently, the role of IAPs as E3 ligases through the Ring domain was revealed. Using proteomic analysis to explore potential target proteins of DIAP1, we identified Drosophila Endonuclease G (dEndoG), which is known as an effector of caspase-independent cell death. In this study, we demonstrate that human EndoG interacts with IAPs, including human cellular Inhibitor of Apoptosis Protein 1 (cIAP1). EndoG was ubiquitinated by IAPs in vitro and in human cell lines. Interestingly, cIAP1 was capable of ubiquitinating EndoG in the presence of wild-type and mutant Ubiquitin, in which all lysines except K63 were mutated to arginine. cIAP1 expression did not change the half-life of EndoG and cIAP1 depletion did not alter its levels. Expression of dEndoG 54310, in which the mitochondrial localization sequence was deleted, led to cell death that could not be suppressed by DIAP1 in S2 cells. Moreover, EndoG-mediated cell death induced by oxidative stress in HeLa cells was not affected by cIAP1. Therefore, these results indicate that IAPs interact and ubiquitinate EndoG via K63-mediated isopeptide linkages without affecting EndoG levels and EndoG-mediated cell death, suggesting that EndoG ubiquitination by IAPs may serve as a regulatory signal independent of proteasomal degradation.
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Affiliation(s)
- Tae Woong Seo
- Department of Biology, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701, Republic of Korea
| | - Ji Sun Lee
- Department of Nanopharmaceutical Life Sciences, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701, Republic of Korea
| | - Soon Ji Yoo
- Department of Biology, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701, Republic of Korea; Department of Nanopharmaceutical Life Sciences, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701, Republic of Korea.
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