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Bodrug T, Welsh KA, Bolhuis DL, Paulаkonis E, Martinez-Chacin RC, Liu B, Pinkin N, Bonacci T, Cui L, Xu P, Roscow O, Amann SJ, Grishkovskaya I, Emanuele MJ, Harrison JS, Steimel JP, Hahn KM, Zhang W, Zhong ED, Haselbach D, Brown NG. Time-resolved cryo-EM (TR-EM) analysis of substrate polyubiquitination by the RING E3 anaphase-promoting complex/cyclosome (APC/C). Nat Struct Mol Biol 2023; 30:1663-1674. [PMID: 37735619 PMCID: PMC10643132 DOI: 10.1038/s41594-023-01105-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 08/21/2023] [Indexed: 09/23/2023]
Abstract
Substrate polyubiquitination drives a myriad of cellular processes, including the cell cycle, apoptosis and immune responses. Polyubiquitination is highly dynamic, and obtaining mechanistic insight has thus far required artificially trapped structures to stabilize specific steps along the enzymatic process. So far, how any ubiquitin ligase builds a proteasomal degradation signal, which is canonically regarded as four or more ubiquitins, remains unclear. Here we present time-resolved cryogenic electron microscopy studies of the 1.2 MDa E3 ubiquitin ligase, known as the anaphase-promoting complex/cyclosome (APC/C), and its E2 co-enzymes (UBE2C/UBCH10 and UBE2S) during substrate polyubiquitination. Using cryoDRGN (Deep Reconstructing Generative Networks), a neural network-based approach, we reconstruct the conformational changes undergone by the human APC/C during polyubiquitination, directly visualize an active E3-E2 pair modifying its substrate, and identify unexpected interactions between multiple ubiquitins with parts of the APC/C machinery, including its coactivator CDH1. Together, we demonstrate how modification of substrates with nascent ubiquitin chains helps to potentiate processive substrate polyubiquitination, allowing us to model how a ubiquitin ligase builds a proteasomal degradation signal.
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Affiliation(s)
- Tatyana Bodrug
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Kaeli A Welsh
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Derek L Bolhuis
- Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Ethan Paulаkonis
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Raquel C Martinez-Chacin
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Bei Liu
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
- College of Future Technology, National Biomedical Imaging Center, Peking University, Beijing, China
| | - Nicholas Pinkin
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Thomas Bonacci
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Liying Cui
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Pengning Xu
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Olivia Roscow
- Department of Molecular and Cellular Biology, College of Biological Science, University of Guelph, Guelph, Ontario, Canada
| | - Sascha Josef Amann
- Research Institute of Molecular Pathology, Vienna BioCenter, Vienna, Austria
| | - Irina Grishkovskaya
- Research Institute of Molecular Pathology, Vienna BioCenter, Vienna, Austria
| | - Michael J Emanuele
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Joseph S Harrison
- Department of Chemistry, University of the Pacific, Stockton, CA, USA
| | - Joshua P Steimel
- School of Engineering, California Polytechnic State University Humboldt, Arcata, CA, USA
| | - Klaus M Hahn
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Wei Zhang
- Department of Molecular and Cellular Biology, College of Biological Science, University of Guelph, Guelph, Ontario, Canada
| | - Ellen D Zhong
- Department of Computer Science, Princeton University, Princeton, NJ, USA
| | - David Haselbach
- Research Institute of Molecular Pathology, Vienna BioCenter, Vienna, Austria.
| | - Nicholas G Brown
- Department of Pharmacology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA.
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Liu D, Guan X, Liu W, Jia Y, Zhou H, Xi C, Zhao M, Fang Y, Wu L, Li K. Identification of transcriptome characteristics of granulosa cells and the possible role of UBE2C in the pathogenesis of premature ovarian insufficiency. J Ovarian Res 2023; 16:203. [PMID: 37848988 PMCID: PMC10580542 DOI: 10.1186/s13048-023-01266-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 08/17/2023] [Indexed: 10/19/2023] Open
Abstract
BACKGROUND Premature ovarian insufficiency (POI) is an important cause of infertility characterized by the functional decline of the ovary. Granulosa cells (GCs) around oocytes are critical for folliculogenesis, and GC dysfunction is one of the important etiologies of POI. The aim of this study was to explore the potential biomarkers of POI by identifying hub genes and analyze the correlation of biomarkers with immune infiltration in POI using RNA profiling and bioinformatics analysis. METHODS RNA sequencing was performed on GCs from biochemical POI (bPOI) patients and controls. Differential expression analysis and weighted gene co-expression network analysis (WGCNA) were used to explore the candidate genes. qRT‒PCR was performed to verify the expression of hub genes. Western blot, Cell Counting Kit-8, 5-ethynyl-2'-deoxyuridine (EdU) assays, TUNEL (TdT-mediated dUTP Nick-End Labeling) and flow cytometry analysis were used to validate the possible role of ubiquitin-conjugating enzyme 2C (UBE2C) in POI. CIBERSORT was adopted to explore immune cell infiltration and the correlation between UBE2C and immune cells in bPOI. RESULTS Through analysis of differentially expressed genes (DEGs) and WGCNA, we obtained 143 candidate genes. After construction of the protein‒protein interaction (PPI) network and analysis with Cytoscape, 10 hub genes, including UBE2C, PBK, BUB1, CDC20, NUSAP1, CENPA, CCNB2, TOP2A, AURKB, and FOXM1, were identified and verified by qRT‒PCR. Subsequently, UBE2C was chosen as a possible biomarker of POI because knockdown of UBE2C could inhibit the proliferation and promote the apoptosis of GCs. Immune infiltration analysis indicated that monocytes and M1 macrophages may be associated with the pathogenesis of POI. In addition, UBE2C was negatively correlated with monocytes and M1 macrophages in POI. CONCLUSIONS This study identified a hub gene in GCs that might be important in the pathogenesis of POI and revealed the key role of UBE2C in driving POI. Immune infiltration may be highly related with the onset and etiology of POI.
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Affiliation(s)
- Dan Liu
- Centre for Assisted Reproduction, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, 2699 Gaoke West Road, Pudong District, Shanghai, 201204, China
| | - Xiaohong Guan
- Department of Obstetrics and Gynecology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Wenqiang Liu
- Centre for Assisted Reproduction, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, 2699 Gaoke West Road, Pudong District, Shanghai, 201204, China
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Yanping Jia
- Centre for Assisted Reproduction, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, 2699 Gaoke West Road, Pudong District, Shanghai, 201204, China
| | - Hong Zhou
- Centre for Assisted Reproduction, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, 2699 Gaoke West Road, Pudong District, Shanghai, 201204, China
| | - Chenxiang Xi
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Mei Zhao
- Centre for Assisted Reproduction, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, 2699 Gaoke West Road, Pudong District, Shanghai, 201204, China
| | - Yuan Fang
- Department of Obstetrics and Gynecology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Li Wu
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
| | - Kunming Li
- Centre for Assisted Reproduction, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, 2699 Gaoke West Road, Pudong District, Shanghai, 201204, China.
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3
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Wang Z, Yuan Q, Chen X, Luo F, Shi X, Guo F, Ren J, Li S, Shang D. A prospective prognostic signature for pancreatic adenocarcinoma based on ubiquitination-related mRNA-lncRNA with experimental validation in vitro and vivo. Funct Integr Genomics 2023; 23:263. [PMID: 37540295 PMCID: PMC10403435 DOI: 10.1007/s10142-023-01158-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 08/05/2023]
Abstract
Ubiquitination-related genes (URGs) exerted a crucial part in a variety of human disease disorders; however, their association with pancreatic adenocarcinoma (PAAD) had yet to be clearly described. We aimed to comprehensively characterize the contributions of URGs in PAAD through in silico analysis and experimental validation, and then identified a robust mRNA-lncRNA-based molecular prognostic panel for patients with PAAD using bulk RNA-sequencing and single-cell RNA-sequencing data. Initially, we collected the multi-omics data from TCGA platform to depict a comprehensive landscape of URGs in pan-cancer. Furthermore, we were accurate to PAAD for in-depth analysis. Significant differences of the activation of ubiquitination pathways and the expression of URGs were detected between normal and malignant cells. Unsupervised hierarchical clustering determined two PAAD subtypes with distinct clinical outcomes, ubiquitination pathway activities, immune microenvironment, and functional annotation characteristics. The expression profiles of ubiquitination-associated mRNAs and lncRNAs in the training and validation datasets were utilized to develop and verify a novel ubiquitination-related mRNA-lncRNA prognostic panel, which had a satisfied prediction efficiency. Our ubiquitination-associated model could function as an effective prognostic index and outperformed four other recognized panels in evaluating PAAD patients' survival status. Tumor immune microenvironment, mutation burden, and chemotherapy response were intensively explored to demonstrate the underlying mechanism of prognostic difference according to our panel. Our findings also revealed that FTI-277, a farnesyltransferase inhibitor, had a better curative effect in high-risk patients, while MK-2206, an Akt allosteric inhibitor, had a superior therapeutic effect in low-risk patients. The real-time PCR results uncovered the RNA expression of AC005062.1 in all the three PAAD cell lines was elevated several thousandfold. In conclusion, our URGs-based classification panel could be triumphantly served as a prediction tool for survival evaluation in patients with PAAD, and the genes in this panel could be developed as a potential target in PAAD therapy.
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Affiliation(s)
- Zhizhou Wang
- Department of General Surgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- Laboratory of Integrative Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Qihang Yuan
- Department of General Surgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Xu Chen
- Department of General Surgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Fei Luo
- Laboratory of Integrative Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Xueying Shi
- Laboratory of Integrative Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Fangyue Guo
- Laboratory of Integrative Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Jie Ren
- Department of Oncology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China.
| | - Shuang Li
- Department of General Surgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China.
- Laboratory of Integrative Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China.
| | - Dong Shang
- Department of General Surgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China.
- Laboratory of Integrative Medicine, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China.
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China.
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Kim JH, Lee KW, Yang HJ, Park JJ, Lee CH, Jeon YS, Yun JH, Park S, Song SJ, Kim YH, Lee JH, Moon A, Song YS. The correlation between the expression of ubiquitin-conjugating enzyme 2C and prostate cancer prognosis. J Cancer Res Clin Oncol 2023:10.1007/s00432-023-04611-7. [PMID: 36752909 DOI: 10.1007/s00432-023-04611-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 01/27/2023] [Indexed: 02/09/2023]
Abstract
PURPOSE Ubiquitin-conjugating enzyme E2 C (UBE2C) is known to show a causal relationship with cancer development and advancement. The role of UBE2C is to control the mitotic spindle checkpoint. Excess UBE2C has been identified in patients with advanced prostate cancer. The objective of the present study was to examine positive connections between the expression of UBE2C and prognostic factors for prostate cancer. METHODS Prostate cancer patients' clinical data were analysed. Tissue microarrays (TMAs) were also performed for human prostate cancer tissues (n = 335) and adjacent non-neoplastic tissues (n = 22). TMA slides were incubated with antibodies against UBE2C. Cores were scored by a pathologist who was blind to cancer results. RESULTS Of 335 prostate cancer patients, 200 could be assessed for biochemical recurrence, clinical recurrence, and overall survival. Human prostate cancer tissues showed higher expression of UBE2C than adjacent non-neoplastic tissues. High expression level of UBE2C showed a strong positive relationship with a high prostate-specific antigen (PSA), Gleason's score, and pathological stage of prostate cancer. Patients with a higher UBE2C grade demonstrated greater lymphatic engagement of prostate cancer than those with a lower UBE2C grade. CONCLUSION The expression of UBE2C has positive correlations with several prognostic factors for prostate cancer. Thus, investigating the expression level of UBE2C staining is a promising tool for predicting prostate cancer prognosis.
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Affiliation(s)
- Jae Heon Kim
- Department of Urology, Soonchunhyang University School of Medicine, 59, Daesagwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea
| | - Kwang Woo Lee
- Department of Urology, Soonchunhyang University School of Medicine, Bucheon, Republic of Korea
| | - Hee Jo Yang
- Department of Urology, Soonchunhyang University School of Medicine, Cheonan, Republic of Korea
| | - Jae Joon Park
- Department of Urology, Soonchunhyang University School of Medicine, 59, Daesagwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea
| | - Chang Ho Lee
- Department of Urology, Soonchunhyang University School of Medicine, Cheonan, Republic of Korea
| | - Youn Soo Jeon
- Department of Urology, Soonchunhyang University School of Medicine, Cheonan, Republic of Korea
| | - Jong Hyun Yun
- Department of Urology, Soonchunhyang University School of Medicine, Gumi, Republic of Korea
| | - Suyeon Park
- Department of Biostatistics, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea
- Department of Applied Statistics, Chung-Ang University, Seoul, Republic of Korea
| | - Su Jung Song
- Soonchunhyang Institute of Medi-Bio Science, Soonchunhyang University, Cheonan, Republic of Korea
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan, Republic of Korea
| | - Yon Hee Kim
- Department of Pathology, Soonchunhyang University School of Medicine, Seoul, Republic of Korea
| | - Ji-Hye Lee
- Department of Pathology, Soonchunhyang University School of Medicine, Cheonan, Republic of Korea
| | - Ahrim Moon
- Department of Pathology, Soonchunhyang University School of Medicine, 170, Jomaru-ro, Bucheon-si, Bucheon, 14584, Gyeonggi-do, Republic of Korea.
| | - Yun Seob Song
- Department of Urology, Soonchunhyang University School of Medicine, 59, Daesagwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea.
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Lou Y, Ye M, Xu C, Tao F. Insight into the physiological and pathological roles of USP44, a potential tumor target (Review). Oncol Lett 2022; 24:455. [PMID: 36380875 PMCID: PMC9650596 DOI: 10.3892/ol.2022.13575] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 10/06/2022] [Indexed: 11/24/2022] Open
Abstract
Ubiquitin-specific peptidase 44 (USP44) is a member of the ubiquitin-specific proteases (USPs) family and its functions in various biological processes have been gradually elucidated in recent years. USP44 targets multiple downstream factors and regulates multiple mechanisms through its deubiquitination activity. Ubiquitination is, in essence, a process in which a single ubiquitin molecule or a multiubiquitin chain binds to a substrate protein to form an isopeptide bond. Deubiquitination is the catalyzing of the isopeptide bonds between ubiquitin and substrate proteins through deubiquitylating enzymes. These two processes serve an important role in the regulation of the expression, conformation, localization and function of substrate proteins by regulating their binding to ubiquitin. Based on existing research, this paper summarized the current state of knowledge about USP44. The physiological roles of USP44 in various cellular events and its pathophysiological roles in different cancer types are evaluated and the therapeutic potential of USP44 for cancer treatment is evaluated.
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Affiliation(s)
- Yuming Lou
- Department of Breast and Thyroid Surgery, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang 321000, P.R. China,Department of Stomach and Intestine Surgery, Shaoxing Hospital, Zhejiang University School of Medicine, Shaoxing, Zhejiang 312000, P.R. China
| | - Minfeng Ye
- Department of Stomach and Intestine Surgery, Shaoxing Hospital, Zhejiang University School of Medicine, Shaoxing, Zhejiang 312000, P.R. China
| | - Chaoyang Xu
- Department of Breast and Thyroid Surgery, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang 321000, P.R. China,Department of Stomach and Intestine Surgery, Shaoxing Hospital, Zhejiang University School of Medicine, Shaoxing, Zhejiang 312000, P.R. China,Correspondence to: Dr Chaoyang Xu, Department of Breast and Thyroid Surgery, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, 365 Renmin East Road, Jinhua, Zhejiang 321000, P.R. China, E-mail:
| | - Feng Tao
- Department of Stomach and Intestine Surgery, Shaoxing Hospital, Zhejiang University School of Medicine, Shaoxing, Zhejiang 312000, P.R. China,Professor Feng Tao, Department of Stomach and Intestine Surgery, Shaoxing Hospital, Zhejiang University School of Medicine, 568 Zhongxing North Road, Shaoxing, Zhejiang 312000, P.R. China, E-mail:
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Das A, Foglizzo M, Padala P, Zhu J, Day CL. TRAF trimers form immune signalling networks via RING domain dimerization. FEBS Lett 2022; 597:1213-1224. [PMID: 36310378 DOI: 10.1002/1873-3468.14530] [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: 08/11/2022] [Revised: 10/05/2022] [Accepted: 10/07/2022] [Indexed: 12/13/2022]
Abstract
For many inflammatory cytokines, the response elicited is dependent on the recruitment of the tumour necrosis factor receptor-associated factor (TRAF) family of adaptor proteins. All TRAF proteins have a trimeric C-terminal TRAF domain, while at the N-terminus most TRAFs have a RING domain that forms dimers. The symmetry mismatch of the N- and C-terminal halves of TRAF proteins means that when receptors cluster, it is presumed that RING dimers connect TRAF trimers to form a network. Here, using purified TRAF6 proteins, we provide direct evidence in support of this model, and we show that TRAF6 trimers bind Lys63-linked ubiquitin chains to promote their processive assembly. This study provides critical evidence in support of TRAF trimers as key players in signalling.
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Affiliation(s)
- Anubrita Das
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Martina Foglizzo
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Prasanth Padala
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Jingyi Zhu
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Catherine L Day
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
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7
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Brio L, Wasserman D, Michaely-Barbiro E, Barazany-Gal G, Gerber D, Tzur A. Affinity microfluidics enables high-throughput protein degradation analysis in cell-free extracts. Commun Biol 2022; 5:1147. [DOI: 10.1038/s42003-022-04103-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/12/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractProtein degradation mediated by the ubiquitin-proteasome pathway regulates signaling events in many physiological and pathological conditions. In vitro degradation assays have been instrumental in the understanding of how cell proliferation and other fundamental cellular processes are regulated. These assays are direct, time-specific and highly informative but also laborious, typically relying on low-throughput polyacrylamide gel-electrophoresis followed by autoradiography or immunoblotting. We present protein degradation on chip (pDOC), a MITOMI-based integrated microfluidic technology for discovery and analysis of proteins degradation in cell-free extracts. The platform accommodates hundreds of microchambers on which protein degradation is assayed quickly, simultaneously and using minute amounts of reagents in one or many physiochemical environments. Essentially, pDOC provides a sensitive multiplex alternative to the conventional degradation assay, with relevance to biomedical and translational research associated with regulated proteolysis.
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Wang X, Ye F, Xiong M, Xiu B, Chi W, Zhang Q, Xue J, Chen M, Zhang L, Wu J, Chi Y. Cross-talk of four types of RNA modification proteins with adenosine reveals the landscape of multivariate prognostic patterns in breast cancer. Front Genet 2022; 13:943378. [PMID: 36118888 PMCID: PMC9479131 DOI: 10.3389/fgene.2022.943378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/10/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Breast cancer (BC) is the most common malignant tumour, and its heterogeneity is one of its major characteristics. N6-methyladenosine (m6A), N1-methyladenosine (m1A), alternative polyadenylation (APA), and adenosine-to-inosine (A-to-I) RNA editing constitute the four most common adenosine-associated RNA modifications and represent the most typical and critical forms of epigenetic regulation contributing to the immunoinflammatory response, tumorigenesis and tumour heterogeneity. However, the cross-talk and potential combined profiles of these RNA-modified proteins (RMPs) in multivariate prognostic patterns of BC remain unknown.Methods: A total of 48 published RMPs were analysed and found to display significant expression alterations and genomic mutation rates between tumour and normal tissues in the TCGA-BRCA cohort. Data from 4188 BC patients with clinical outcomes were downloaded from the Gene Expression Omnibus (GEO), the Cancer Genome Atlas (TCGA), and the Molecular Taxonomy of Breast Cancer International Consortium (METABRIC), normalized and merged into one cohort. The prognostic value and interconnections of these RMPs were also studied. The four prognosis-related genes (PRGs) with the greatest prognostic value were then selected to construct diverse RMP-associated prognostic models through univariate Cox (uniCox) regression analysis, differential expression analysis, Least absolute shrinkage and selection operator (LASSO) regression and multivariate Cox (multiCox) regression. Alterations in biological functional pathways, genomic mutations, immune infiltrations, RNAss scores and drug sensitivities among different models, as well as their prognostic value, were then explored.Results: Utilizing a large number of samples and a comprehensive set of genes contributing to adenosine-associated RNA modification, our study revealed the joint potential bio-functions and underlying features of these diverse RMPs and provided effective models (PRG clusters, gene clusters and the risk model) for predicting the clinical outcomes of BC. The individuals with higher risk scores showed poor prognoses, cell cycle function enrichment, upregulation of stemness scores, higher tumour mutation burdens (TMBs), immune activation and specific drug resistance. This work highlights the significance of comprehensively examining post-transcriptional RNA modification genes.Conclusion: Here, we designed and verified an advanced forecasting model to reveal the underlying links between BC and RMPs and precisely predict the clinical outcomes of multivariate prognostic patterns for individuals.
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Affiliation(s)
- Xuliren Wang
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Fangdie Ye
- Department of Urology, Huashan Hospital, Fudan University, Shanghai, China
| | - Min Xiong
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Bingqiu Xiu
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Weiru Chi
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Qi Zhang
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Jingyan Xue
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Ming Chen
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Liyi Zhang
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Jiong Wu
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
- Collaborative Innovation Center for Cancer Medicine, Shanghai, China
- *Correspondence: Jiong Wu, ; Yayun Chi,
| | - Yayun Chi
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
- *Correspondence: Jiong Wu, ; Yayun Chi,
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9
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Kim JH, Yang HJ, Lee CH, Jeon YS, Park JJ, Lee KW, Kim JH, Park SY, Song SJ, Kim YH, Moon AR, Lee JH, Song YS. The Positive Correlations between the Expression of Histopathological Ubiquitin-Conjugating Enzyme 2O Staining and Prostate Cancer Advancement. Pharmaceuticals (Basel) 2021; 14:ph14080778. [PMID: 34451875 PMCID: PMC8398491 DOI: 10.3390/ph14080778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 07/19/2021] [Accepted: 08/06/2021] [Indexed: 12/04/2022] Open
Abstract
Background: The mTOR signaling pathway is inactivated by AMPK’s tumor-suppressing function. It is recognized that ubiquitin conjugating enzyme 2O (UBE2O), which directly targets AMPK for ubiquitination and degradation, is intensified in human cancers. Methods: This study investigated the clinical data about prostate cancer. Examination was also carried out into tissue microarrays (TMA) of human prostate cancer (n = 382) and adjacent non-neoplastic tissues around prostate cancer (n = 61). The TMA slides were incubated with antibodies against UBE2O, and the cores were scored by the pathologist blind to cancer results. Results: Very strong positive correlations were identified between the expression of UBE2O staining and high PSA and pathological stage of prostate cancer. Cox’s proportional hazard analysis established correlations between the following: (1) positive surgical margin and biochemical recurrence free survival, (2) PSA grade and clinical recurrence free survival, (3) regional lymph node positive and clinical recurrence free survival, (4) adjuvant treatment and overall survival, and (5) pathological T stage and overall survival. Conclusion: There is a positive correlation between the expression of UBE2O staining and prognosis for prostate cancer. Thus, a prostate cancer prognosis can be assessed with the expression of UBE2O staining.
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Affiliation(s)
- Jae-Heon Kim
- Department of Urology, Soonchunhyang University School of Medicine, Seoul 04404, Korea; (J.-H.K.); (J.-J.P.)
- Department of Microbiology, Soonchunhyang University School of Medicine, Seoul 04404, Korea
| | - Hee-Jo Yang
- Department of Urology, Soonchunhyang University School of Medicine, Cheonan 31151, Korea; (H.-J.Y.); (C.-H.L.); (Y.-S.J.)
| | - Chang-Ho Lee
- Department of Urology, Soonchunhyang University School of Medicine, Cheonan 31151, Korea; (H.-J.Y.); (C.-H.L.); (Y.-S.J.)
| | - Youn-Soo Jeon
- Department of Urology, Soonchunhyang University School of Medicine, Cheonan 31151, Korea; (H.-J.Y.); (C.-H.L.); (Y.-S.J.)
| | - Jae-Joon Park
- Department of Urology, Soonchunhyang University School of Medicine, Seoul 04404, Korea; (J.-H.K.); (J.-J.P.)
| | - Kwang-Woo Lee
- Department of Urology, Soonchunhyang University School of Medicine, Bucheon 14584, Korea;
| | - Jae-Ho Kim
- Department of Urology, Soonchunhyang University School of Medicine, Gumi 39371, Korea;
| | - Su-Yeon Park
- Department of Data Innovation, Soonchunhyang University Seoul Hospital, Seoul 04404, Korea;
- Department of Applied Statistics, Chung-Ang University, Seoul 06974, Korea
| | - Su-Jung Song
- Soonchunhyang Institute of Medi-bio Science, Soonchunhyang University, Cheonan 31151, Korea;
- Department of Integrated Biomedical Science, Soonchunhyang University, Cheonan 31151, Korea
| | - Yon-Hee Kim
- Department of Pathology, Soonchunhyang University School of Medicine, Seoul 04404, Korea;
| | - Ah-Rim Moon
- Department of Pathology, Soonchunhyang University School of Medicine, Bucheon 14584, Korea;
| | - Ji-Hye Lee
- Department of Pathology, Soonchunhyang University School of Medicine, Cheonan 31151, Korea
- Correspondence: (J.-H.L.); (Y.-S.S.); Tel.: +82-51-570-3580 (J.-H.L.); +82-2-709-9375 (Y.-S.S.)
| | - Yun-Seob Song
- Department of Urology, Soonchunhyang University School of Medicine, Seoul 04404, Korea; (J.-H.K.); (J.-J.P.)
- Correspondence: (J.-H.L.); (Y.-S.S.); Tel.: +82-51-570-3580 (J.-H.L.); +82-2-709-9375 (Y.-S.S.)
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10
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Bodrug T, Welsh KA, Hinkle M, Emanuele MJ, Brown NG. Intricate Regulatory Mechanisms of the Anaphase-Promoting Complex/Cyclosome and Its Role in Chromatin Regulation. Front Cell Dev Biol 2021; 9:687515. [PMID: 34109183 PMCID: PMC8182066 DOI: 10.3389/fcell.2021.687515] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 04/26/2021] [Indexed: 02/04/2023] Open
Abstract
The ubiquitin (Ub)-proteasome system is vital to nearly every biological process in eukaryotes. Specifically, the conjugation of Ub to target proteins by Ub ligases, such as the Anaphase-Promoting Complex/Cyclosome (APC/C), is paramount for cell cycle transitions as it leads to the irreversible destruction of cell cycle regulators by the proteasome. Through this activity, the RING Ub ligase APC/C governs mitosis, G1, and numerous aspects of neurobiology. Pioneering cryo-EM, biochemical reconstitution, and cell-based studies have illuminated many aspects of the conformational dynamics of this large, multi-subunit complex and the sophisticated regulation of APC/C function. More recent studies have revealed new mechanisms that selectively dictate APC/C activity and explore additional pathways that are controlled by APC/C-mediated ubiquitination, including an intimate relationship with chromatin regulation. These tasks go beyond the traditional cell cycle role historically ascribed to the APC/C. Here, we review these novel findings, examine the mechanistic implications of APC/C regulation, and discuss the role of the APC/C in previously unappreciated signaling pathways.
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Affiliation(s)
- Tatyana Bodrug
- Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Kaeli A Welsh
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, United States
| | - Megan Hinkle
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, United States
| | - Michael J Emanuele
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, United States
| | - Nicholas G Brown
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC, United States
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11
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E3 Ubiquitin Ligase APC/C Cdh1 Negatively Regulates FAH Protein Stability by Promoting Its Polyubiquitination. Int J Mol Sci 2020; 21:ijms21228719. [PMID: 33218190 PMCID: PMC7699203 DOI: 10.3390/ijms21228719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/13/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022] Open
Abstract
Fumarylacetoacetate hydrolase (FAH) is the last enzyme in the degradation pathway of the amino acids tyrosine and phenylalanine in mammals that catalyzes the hydrolysis of 4-fumarylacetoacetate into acetoacetate and fumarate. Mutations of the FAH gene are associated with hereditary tyrosinemia type I (HT1), resulting in reduced protein stability, misfolding, accelerated degradation and deficiency in functional proteins. Identifying E3 ligases, which are necessary for FAH protein stability and degradation, is essential. In this study, we demonstrated that the FAH protein level is elevated in liver cancer tissues compared to that in normal tissues. Further, we showed that the FAH protein undergoes 26S proteasomal degradation and its protein turnover is regulated by the anaphase-promoting complex/cyclosome-Cdh1 (APC/C)Cdh1 E3 ubiquitin ligase complex. APC/CCdh1 acts as a negative stabilizer of FAH protein by promoting FAH polyubiquitination and decreases the half-life of FAH protein. Thus, we envision that Cdh1 might be a key factor in the maintenance of FAH protein level to regulate FAH-mediated physiological functions.
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12
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Holder J, Mohammed S, Barr FA. Ordered dephosphorylation initiated by the selective proteolysis of cyclin B drives mitotic exit. eLife 2020; 9:e59885. [PMID: 32869743 PMCID: PMC7529458 DOI: 10.7554/elife.59885] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/31/2020] [Indexed: 12/13/2022] Open
Abstract
APC/C-mediated proteolysis of cyclin B and securin promotes anaphase entry, inactivating CDK1 and permitting chromosome segregation, respectively. Reduction of CDK1 activity relieves inhibition of the CDK1-counteracting phosphatases PP1 and PP2A-B55, allowing wide-spread dephosphorylation of substrates. Meanwhile, continued APC/C activity promotes proteolysis of other mitotic regulators. Together, these activities orchestrate a complex series of events during mitotic exit. However, the relative importance of regulated proteolysis and dephosphorylation in dictating the order and timing of these events remains unclear. Using high temporal-resolution proteomics, we compare the relative extent of proteolysis and protein dephosphorylation. This reveals highly-selective rapid proteolysis of cyclin B, securin and geminin at the metaphase-anaphase transition, followed by slow proteolysis of other substrates. Dephosphorylation requires APC/C-dependent destruction of cyclin B and was resolved into PP1-dependent categories with unique sequence motifs. We conclude that dephosphorylation initiated by selective proteolysis of cyclin B drives the bulk of changes observed during mitotic exit.
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Affiliation(s)
- James Holder
- Department of Biochemistry, University of OxfordOxfordUnited Kingdom
| | - Shabaz Mohammed
- Department of Biochemistry, University of OxfordOxfordUnited Kingdom
| | - Francis A Barr
- Department of Biochemistry, University of OxfordOxfordUnited Kingdom
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13
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Alfieri C, Tischer T, Barford D. A unique binding mode of Nek2A to the APC/C allows its ubiquitination during prometaphase. EMBO Rep 2020; 21:e49831. [PMID: 32307883 PMCID: PMC7271329 DOI: 10.15252/embr.201949831] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 03/11/2020] [Accepted: 03/17/2020] [Indexed: 11/09/2022] Open
Abstract
The anaphase-promoting complex (APC/C) is the key E3 ubiquitin ligase which directs mitotic progression and exit by catalysing the sequential ubiquitination of specific substrates. The activity of the APC/C in mitosis is restrained by the spindle assembly checkpoint (SAC), which coordinates chromosome segregation with the assembly of the mitotic spindle. The SAC effector is the mitotic checkpoint complex (MCC), which binds and inhibits the APC/C. It is incompletely understood how the APC/C switches substrate specificity in a cell cycle-specific manner. For instance, it is unclear how in prometaphase, when APC/C activity towards cyclin B and securin is repressed by the MCC, the kinase Nek2A is ubiquitinated. Here, we combine biochemical and structural analysis with functional studies in cells to show that Nek2A is a conformational-specific binder of the APC/C-MCC complex (APC/CMCC ) and that, in contrast to cyclin A, Nek2A can be ubiquitinated efficiently by the APC/C in conjunction with both the E2 enzymes UbcH10 and UbcH5. We propose that these special features of Nek2A allow its prometaphase-specific ubiquitination.
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Affiliation(s)
- Claudio Alfieri
- MRC Laboratory of Molecular BiologyCambridgeUK
- Present address:
Institute of Cancer ResearchLondonUK
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14
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Wasserman D, Nachum S, Cohen M, Enrico TP, Noach-Hirsh M, Parasol J, Zomer-Polak S, Auerbach N, Sheinberger-Chorni E, Nevenzal H, Levi-Dadon N, Wang X, Lahmi R, Michaely E, Gerber D, Emanuele MJ, Tzur A. Cell cycle oscillators underlying orderly proteolysis of E2F8. Mol Biol Cell 2020; 31:725-740. [PMID: 31995441 PMCID: PMC7185961 DOI: 10.1091/mbc.e19-12-0725] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
E2F8 is a transcriptional repressor that antagonizes E2F1 at the crossroads of the cell cycle, apoptosis, and cancer. Previously, we discovered that E2F8 is a direct target of the APC/C ubiquitin ligase. Nevertheless, it remains unknown how E2F8 is dynamically controlled throughout the entirety of the cell cycle. Here, using newly developed human cell-free systems that recapitulate distinct inter-mitotic and G1 phases and a continuous transition from prometaphase to G1, we reveal an interlocking dephosphorylation switch coordinating E2F8 degradation with mitotic exit and the activation of APC/CCdh1. Further, we uncover differential proteolysis rates for E2F8 at different points within G1 phase, accounting for its accumulation in late G1 while APC/CCdh1 is still active. Finally, we demonstrate that the F-box protein Cyclin F regulates E2F8 in G2-phase. Altogether, our data define E2F8 regulation throughout the cell cycle, illuminating an extensive coordination between phosphorylation, ubiquitination and transcription in mammalian cell cycle.
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Affiliation(s)
- Danit Wasserman
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Sapir Nachum
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Meital Cohen
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Taylor P Enrico
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Meirav Noach-Hirsh
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Jasmin Parasol
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Sarit Zomer-Polak
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Naomi Auerbach
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Evelin Sheinberger-Chorni
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Hadas Nevenzal
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Nofar Levi-Dadon
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Xianxi Wang
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Roxane Lahmi
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Efrat Michaely
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Doron Gerber
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
| | - Michael J Emanuele
- Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Amit Tzur
- Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan 5290002, Israel
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15
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Alafate W, Zuo J, Deng Z, Guo X, Wu W, Zhang W, Xie W, Wang M, Wang J. Combined elevation of AURKB and UBE2C predicts severe outcomes and therapy resistance in glioma. Pathol Res Pract 2019; 215:152557. [DOI: 10.1016/j.prp.2019.152557] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 07/02/2019] [Accepted: 07/22/2019] [Indexed: 11/30/2022]
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16
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Liu J, Yao Q, Xiao L, Li F, Ma W, Zhang Z, Xie X, Yang C, Cui Q, Tian Y, Zhang C, Lai B, Wang N. APC/Cdh1 targets PECAM-1 for ubiquitination and degradation in endothelial cells. J Cell Physiol 2019; 235:2521-2531. [PMID: 31489637 DOI: 10.1002/jcp.29156] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 08/26/2019] [Indexed: 01/13/2023]
Abstract
Platelet endothelial cell adhesion molecule-1 (PECAM-1) is a member of the immunoglobulin superfamily and is expressed by hematopoietic and endothelial cells (ECs). Recent studies have shown that PECAM-1 plays a crucial role in promoting the development of the EC inflammatory response in the context of disturbed flow. However, the mechanistic pathways that control PECAM-1 protein stability remain largely unclear. Here, we identified PECAM-1 as a novel substrate of the APC/Cdh1 E3 ubiquitin ligase. Specifically, lentivirus-mediated Cdh1 depletion stabilized PECAM-1 in ECs. Conversely, overexpression of Cdh1 destabilized PECAM-1. The proteasome inhibitor MG132 blocked Cdh1-mediated PECAM-1 degradation. In addition, Cdh1 promoted K48-linked polyubiquitination of PECAM-1 in a destruction box-dependent manner. Furthermore, we demonstrated that compared with pulsatile shear stress (PS), oscillatory shear stress decreased the expression of Cdh1 and the ubiquitination of PECAM-1, therefore stabilizing PECAM-1 to promote inflammation in ECs. Hence, our study revealed a novel mechanism by which fluid flow patterns regulate EC homeostasis via Cdh1-dependent ubiquitination and subsequent degradation of PECAM-1.
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Affiliation(s)
- Jia Liu
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Qinyu Yao
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Lei Xiao
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Fan Li
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Wen Ma
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Zihui Zhang
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Xinya Xie
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Chunmiao Yang
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Qi Cui
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, China
| | - Ying Tian
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Chao Zhang
- Bioinspired Engineering and Biomechanics Center, Xi'an Jiaotong University, Xi'an, China
| | - Baochang Lai
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Nanping Wang
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, China.,College of Basic Medical Sciences, Dalian Medical University, Dalian, China
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17
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Zhang S, Tischer T, Barford D. Cyclin A2 degradation during the spindle assembly checkpoint requires multiple binding modes to the APC/C. Nat Commun 2019; 10:3863. [PMID: 31455778 PMCID: PMC6712056 DOI: 10.1038/s41467-019-11833-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 07/29/2019] [Indexed: 12/19/2022] Open
Abstract
The anaphase-promoting complex/cyclosome (APC/C) orchestrates cell cycle progression by controlling the temporal degradation of specific cell cycle regulators. Although cyclin A2 and cyclin B1 are both targeted for degradation by the APC/C, during the spindle assembly checkpoint (SAC), the mitotic checkpoint complex (MCC) represses APC/C's activity towards cyclin B1, but not cyclin A2. Through structural, biochemical and in vivo analysis, we identify a non-canonical D box (D2) that is critical for cyclin A2 ubiquitination in vitro and degradation in vivo. During the SAC, cyclin A2 is ubiquitinated by the repressed APC/C-MCC, mediated by the cooperative engagement of its KEN and D2 boxes, ABBA motif, and the cofactor Cks. Once the SAC is satisfied, cyclin A2 binds APC/C-Cdc20 through two mutually exclusive binding modes, resulting in differential ubiquitination efficiency. Our findings reveal that a single substrate can engage an E3 ligase through multiple binding modes, affecting its degradation timing and efficiency.
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Affiliation(s)
- Suyang Zhang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
- Max Planck Institute for Biophysical Chemistry, Göttingen, 37077, Germany
| | - Thomas Tischer
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - David Barford
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK.
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18
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UBE2C Induces Cisplatin Resistance via ZEB1/2-Dependent Upregulation of ABCG2 and ERCC1 in NSCLC Cells. JOURNAL OF ONCOLOGY 2019; 2019:8607859. [PMID: 30693031 PMCID: PMC6333017 DOI: 10.1155/2019/8607859] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 10/19/2018] [Accepted: 11/19/2018] [Indexed: 02/07/2023]
Abstract
Objectives Cisplatin (DDP) is one of the most commonly used chemotherapeutic drugs for several cancers, including non-small-cell lung cancer (NSCLC). However, resistance to DDP eventually develops, limiting its further application. New therapy targets are urgently needed to reverse DDP resistance. Methods The mRNA expression of UBE2C, ZEB1/2, ABCG2, and ERCC1 was analyzed by reverse transcription-polymerase chain reaction. The protein levels of these molecules were analyzed by Western blotting and immunofluorescent staining. Cell proliferation was detected by CCK8 and MTT assays. Cell migration and invasion were analyzed by wound healing assay and Transwell assays. Promoter activities and gene transcription were analyzed by luciferase reporter assay. Results In this study, we examined the effect of UBE2C and ZEB1/2 expression levels in DDP-resistant cells of NSCLC. We confirmed that aberrant expression of UBE2C and ZEB1/2 plays a critical role in repressing the DDP sensitivity to NSCLC cells. Additionally, knockdown of UBE2C significantly sensitized resistant cells to DDP by repressing the expression of ZEB1/2. Mechanistic investigations indicated that UBE2C transcriptionally regulated ZEB1/2 by accelerating promoter activity. This study revealed that ZEB1/2 promotes the epithelial mesenchymal transition and expression of ABCG2 and ERCC1 to participate in UBE2C-mediated NSCLC DDP-resistant cell progression, metastasis, and invasion. Conclusion UBE2C may be a novel therapy target for NSCLC for sensitizing cells to the chemotherapeutic agent DDP.
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19
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Traynard P, Fauré A, Fages F, Thieffry D. Logical model specification aided by model-checking techniques: application to the mammalian cell cycle regulation. Bioinformatics 2017; 32:i772-i780. [PMID: 27587700 DOI: 10.1093/bioinformatics/btw457] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
MOTIVATION Understanding the temporal behaviour of biological regulatory networks requires the integration of molecular information into a formal model. However, the analysis of model dynamics faces a combinatorial explosion as the number of regulatory components and interactions increases. RESULTS We use model-checking techniques to verify sophisticated dynamical properties resulting from the model regulatory structure in the absence of kinetic assumption. We demonstrate the power of this approach by analysing a logical model of the molecular network controlling mammalian cell cycle. This approach enables a systematic analysis of model properties, the delineation of model limitations, and the assessment of various refinements and extensions based on recent experimental observations. The resulting logical model accounts for the main irreversible transitions between cell cycle phases, the sequential activation of cyclins, and the inhibitory role of Skp2, and further emphasizes the multifunctional role for the cell cycle inhibitor Rb. AVAILABILITY AND IMPLEMENTATION The original and revised mammalian cell cycle models are available in the model repository associated with the public modelling software GINsim (http://ginsim.org/node/189). CONTACT thieffry@ens.fr SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Pauline Traynard
- Computational Systems Biology Team, Institut de Biologie de L'Ecole Normale Supérieure (IBENS), CNRS, Inserm, Ecole Normale Supérieure, PSL Research University, Paris, France EPI Lifeware, Inria Inria Saclay Ile-de-France, Palaiseau, France
| | - Adrien Fauré
- Graduate School of Science and Engineering, Yamaguchi University, Yamaguchi, Japan
| | - François Fages
- EPI Lifeware, Inria Inria Saclay Ile-de-France, Palaiseau, France
| | - Denis Thieffry
- Computational Systems Biology Team, Institut de Biologie de L'Ecole Normale Supérieure (IBENS), CNRS, Inserm, Ecole Normale Supérieure, PSL Research University, Paris, France EPI Lifeware, Inria Inria Saclay Ile-de-France, Palaiseau, France
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20
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Rahimi H, Shokrgozar MA, Madadkar-Sobhani A, Mahdian R, Foroumadi A, Karimipoor M. Structural Insight into Anaphase Promoting Complex 3 Structure and Docking with a Natural Inhibitory Compound. Adv Biomed Res 2017; 6:26. [PMID: 28401073 PMCID: PMC5359995 DOI: 10.4103/2277-9175.201683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Anaphase promoting complex (APC) is the biggest Cullin-RING E3 ligase and is very important in cell cycle control; many anti-cancer agents target this. APC controls the onset of chromosome separation and mitotic exit through securin and cyclin B degradation, respectively. Its APC3 subunit identifies the APC activators-Cdh1 and Cdc20. MATERIALS AND METHODS The structural model of the APC3 subunit of APC was developed by means of computational techniques; the binding of a natural inhibitory compound to APC3 was also investigated. RESULTS It was found that APC3 structure consists of numerous helices organized in anti-parallel and the overall model is superhelical of tetratrico-peptide repeat (TPR) domains. Furthermore, binding pocket of the natural inhibitory compound as APC3 inhibitor was shown. CONCLUSION The findings are beneficial to understand the mechanism of the APC activation and design inhibitory compounds.
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Affiliation(s)
- Hamzeh Rahimi
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | | | - Armin Madadkar-Sobhani
- Department of Life Sciences, Barcelona Supercomputing Center, Barcelona, Spain; Department of Bioinformatics, Institute of Biophysics and Biochemistry, University of Tehran, Tehran, Iran
| | - Reza Mahdian
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Alireza Foroumadi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Morteza Karimipoor
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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21
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Yoshimura S, Kasamatsu A, Nakashima D, Iyoda M, Kasama H, Saito T, Takahara T, Endo-Sakamoto Y, Shiiba M, Tanzawa H, Uzawa K. UBE2S associated with OSCC proliferation by promotion of P21 degradation via the ubiquitin-proteasome system. Biochem Biophys Res Commun 2017; 485:820-825. [PMID: 28257844 DOI: 10.1016/j.bbrc.2017.02.138] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 02/27/2017] [Indexed: 12/12/2022]
Abstract
Ubiquitin-conjugating enzyme E2S (UBE2S), a family of E2 protein in the ubiquitin-proteasome system, is highly expressed in several types of cancers; however, its roles in oral squamous cell carcinoma (OSCC) have not yet been well elucidated. The purpose of this study was to clarify the functional activities of UBE2S in OSCCs. We analyzed the expression levels of UBE2S in nine OSCC cell lines and primary OSCC tissues by quantitative reverse transcriptase-polymerase chain reaction, Western blotting, and immunohistochemistry (IHC). The correlations between UBE2S expression and clinical classifications of OSCCs were analyzed using the IHC scoring system. We also used UBE2S knockdown OSCC cells for functional assays (proliferation assay, flow cytometry, and Western blotting). UBE2S was overexpressed in OSCCs in vitro and in vivo and was correlated significantly (P < 0.05) with the primary tumoral size. The cellular growth was decreased and the cell-cycle was arrested in the G2/M phase in the UBE2S knockdown (shUBE2S) cells. The expression level of P21, a target of the ubiquitin-proteasome system, was increased in the shUBE2S cells because of lower anaphase activity that promotes complex subunit 3 (APC3), an E3 ubiquitin ligase, compared with shMock cells. These findings might promote the understanding of the relationship between UBE2S overexpression and oral cancer proliferation, indicating that UBE2S would be a potential biomarker of and therapeutic target in OSCCs.
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Affiliation(s)
- Shusaku Yoshimura
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Atsushi Kasamatsu
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan.
| | - Dai Nakashima
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Manabu Iyoda
- Division of Oral Surgery, Chiba Rosai Hospital, Chiba, Japan
| | - Hiroki Kasama
- Division of Oral Surgery, Chiba Rosai Hospital, Chiba, Japan
| | - Tomoaki Saito
- Division of Oral Surgery, Chiba Rosai Hospital, Chiba, Japan
| | - Toshikazu Takahara
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yosuke Endo-Sakamoto
- Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
| | - Masashi Shiiba
- Department of Medical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hideki Tanzawa
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan; Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan
| | - Katsuhiro Uzawa
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan; Department of Dentistry and Oral-Maxillofacial Surgery, Chiba University Hospital, Chiba, Japan.
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22
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Li Q, Chang L, Aibara S, Yang J, Zhang Z, Barford D. WD40 domain of Apc1 is critical for the coactivator-induced allosteric transition that stimulates APC/C catalytic activity. Proc Natl Acad Sci U S A 2016; 113:10547-52. [PMID: 27601667 PMCID: PMC5035875 DOI: 10.1073/pnas.1607147113] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The anaphase-promoting complex/cyclosome (APC/C) is a large multimeric cullin-RING E3 ubiquitin ligase that orchestrates cell-cycle progression by targeting cell-cycle regulatory proteins for destruction via the ubiquitin proteasome system. The APC/C assembly comprises two scaffolding subcomplexes: the platform and the TPR lobe that together coordinate the juxtaposition of the catalytic and substrate-recognition modules. The platform comprises APC/C subunits Apc1, Apc4, Apc5, and Apc15. Although the role of Apc1 as an APC/C scaffolding subunit has been characterized, its specific functions in contributing toward APC/C catalytic activity are not fully understood. Here, we report the crystal structure of the N-terminal domain of human Apc1 (Apc1N) determined at 2.2-Å resolution and provide an atomic-resolution description of the architecture of its WD40 (WD40 repeat) domain (Apc1(WD40)). To understand how Apc1(WD40) contributes to APC/C activity, a mutant form of the APC/C with Apc1(WD40) deleted was generated and evaluated biochemically and structurally. We found that the deletion of Apc1(WD40) abolished the UbcH10-dependent ubiquitination of APC/C substrates without impairing the Ube2S-dependent ubiquitin chain elongation activity. A cryo-EM structure of an APC/C-Cdh1 complex with Apc1(WD40) deleted showed that the mutant APC/C is locked into an inactive conformation in which the UbcH10-binding site of the catalytic module is inaccessible. Additionally, an EM density for Apc15 is not visible. Our data show that Apc1(WD40) is required to mediate the coactivator-induced conformational change of the APC/C that is responsible for stimulating APC/C catalytic activity by promoting UbcH10 binding. In contrast, Ube2S activity toward APC/C substrates is not dependent on the initiation-competent conformation of the APC/C.
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Affiliation(s)
- Qiuhong Li
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom; Section of Structural Biology, Chester Beatty Laboratories, Institute of Cancer Research, London SW3 6JB, United Kingdom
| | - Leifu Chang
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom
| | - Shintaro Aibara
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom
| | - Jing Yang
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom
| | - Ziguo Zhang
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom
| | - David Barford
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom;
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23
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Alfieri C, Chang L, Zhang Z, Yang J, Maslen S, Skehel M, Barford D. Molecular basis of APC/C regulation by the spindle assembly checkpoint. Nature 2016; 536:431-436. [PMID: 27509861 PMCID: PMC5019344 DOI: 10.1038/nature19083] [Citation(s) in RCA: 150] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 07/06/2016] [Indexed: 12/12/2022]
Abstract
In the dividing eukaryotic cell, the spindle assembly checkpoint (SAC) ensures that each daughter cell inherits an identical set of chromosomes. The SAC coordinates the correct attachment of sister chromatid kinetochores to the mitotic spindle with activation of the anaphase-promoting complex (APC/C), the E3 ubiquitin ligase responsible for initiating chromosome separation. In response to unattached kinetochores, the SAC generates the mitotic checkpoint complex (MCC), which inhibits the APC/C and delays chromosome segregation. By cryo-electron microscopy, here we determine the near-atomic resolution structure of a human APC/C–MCC complex (APC/C(MCC)). Degron-like sequences of the MCC subunit BubR1 block degron recognition sites on Cdc20, the APC/C coactivator subunit responsible for substrate interactions. BubR1 also obstructs binding of the initiating E2 enzyme UbcH10 to repress APC/C ubiquitination activity. Conformational variability of the complex enables UbcH10 association, and structural analysis shows how the Cdc20 subunit intrinsic to the MCC (Cdc20(MCC)) is ubiquitinated, a process that results in APC/C reactivation when the SAC is silenced.
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Affiliation(s)
- Claudio Alfieri
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Leifu Chang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Ziguo Zhang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Jing Yang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Sarah Maslen
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Mark Skehel
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - David Barford
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
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24
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Cdh1 regulates craniofacial development via APC-dependent ubiquitination and activation of Goosecoid. Cell Res 2016; 26:699-712. [PMID: 27126000 DOI: 10.1038/cr.2016.51] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 11/12/2015] [Accepted: 03/02/2016] [Indexed: 02/05/2023] Open
Abstract
Craniofacial anomalies (CFAs) characterized by birth defects of skull and facial bones are the most frequent congenital disease. Genomic analysis has identified multiple genes responsible for CFAs; however, the underlying genetic mechanisms for the majority of CFAs remain largely unclear. Our previous study revealed that the Wwp2 E3 ubiquitin ligase facilitates craniofacial development in part through inducing monoubiquitination and activation of the paired-like homeobox transcription factor, Goosecoid (Gsc). Here we report that Gsc is also ubiquitinated and activated by the APC(Cdh1) E3 ubiquitin ligase, leading to transcriptional activation of various Gsc target genes crucial for craniofacial development. Consistenly, neural crest-specific Cdh1-knockout mice display similar bone malformation as Wwp2-deficient mice in the craniofacial region, characterized by a domed skull, a short snout and a twisted nasal bone. Mechanistically, like Wwp2-deficient mice, mice with Cdh1 deficiency in neural crest cells exhibit reduced Gsc/Sox6 transcriptional activities. Simultaneous deletion of Cdh1 and Wwp2 results in a more severe craniofacial defect compared with single gene deletion, suggesting a synergistic augmentation of Gsc activity by these two E3 ubiquitin ligases. Hence, our study reveals a novel role for Cdh1 in craniofacial development through promoting APC-dependent non-proteolytic ubiquitination and activation of Gsc.
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25
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Boekhout M, Yuan R, Wondergem AP, Segeren HA, van Liere EA, Awol N, Jansen I, Wolthuis RMF, de Bruin A, Westendorp B. Feedback regulation between atypical E2Fs and APC/CCdh1 coordinates cell cycle progression. EMBO Rep 2016; 17:414-27. [PMID: 26882548 DOI: 10.15252/embr.201540984] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 01/07/2016] [Indexed: 01/20/2023] Open
Abstract
E2F transcription factors control the oscillating expression pattern of multiple target genes during the cell cycle. Activator E2Fs, E2F1-3, induce an upswing of E2F targets, which is essential for the G1-to-S phase transition, whereas atypical E2Fs, E2F7 and E2F8, mediate a downswing of the same targets during late S, G2, and M phases. Expression of atypical E2Fs is induced by E2F1-3, but it is unknown how atypical E2Fs are inactivated in a timely manner. Here, we demonstrate that E2F7 and E2F8 are substrates of the anaphase-promoting complex/cyclosome (APC/C). Removal of CDH1, or mutating the CDH1-interacting KEN boxes, stabilized E2F7/8 from anaphase onwards and during G1. Expressing KEN mutant E2F7 during G1 impairs S phase entry and eventually results in cell death. Furthermore, we show that E2F8, but not E2F7, interacts also with APC/C(C) (dc20). Importantly, atypical E2Fs can activate APC/C(C) (dh1) by repressing its inhibitors cyclin A, cyclin E, and Emi1. In conclusion, we discovered a feedback loop between atypical E2Fs and APC/C(C) (dh1), which ensures balanced expression of cell cycle genes and normal cell cycle progression.
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Affiliation(s)
- Michiel Boekhout
- Division of Cell Biology I (B5), The Netherlands Cancer Institute (NKI-AvL), Amsterdam, The Netherlands
| | - Ruixue Yuan
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Annelotte P Wondergem
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Hendrika A Segeren
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Elsbeth A van Liere
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Nesibu Awol
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Imke Jansen
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Rob M F Wolthuis
- Division of Cell Biology I (B5), The Netherlands Cancer Institute (NKI-AvL), Amsterdam, The Netherlands
| | - Alain de Bruin
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands Department of Pediatrics, Division of Molecular Genetics, University Medical Center Groningen University of Groningen, Groningen, The Netherlands
| | - Bart Westendorp
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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26
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Lindon C, Grant R, Min M. Ubiquitin-Mediated Degradation of Aurora Kinases. Front Oncol 2016; 5:307. [PMID: 26835416 PMCID: PMC4716142 DOI: 10.3389/fonc.2015.00307] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/25/2015] [Indexed: 11/18/2022] Open
Abstract
The Aurora kinases are essential regulators of mitosis in eukaryotes. In somatic cell divisions of higher eukaryotes, the paralogs Aurora kinase A (AurA) and Aurora kinase B (AurB) play non-overlapping roles that depend on their distinct spatiotemporal activities. These mitotic roles of Aurora kinases depend on their interactions with different partners that direct them to different mitotic destinations and different substrates: AurB is a component of the chromosome passenger complex that orchestrates the tasks of chromosome segregation and cytokinesis, while AurA has many known binding partners and mitotic roles, including a well-characterized interaction with TPX2 that mediates its role in mitotic spindle assembly. Beyond the spatial control conferred by different binding partners, Aurora kinases are subject to temporal control of their activation and inactivation. Ubiquitin-mediated proteolysis is a critical route to irreversible inactivation of these kinases, which must occur for ordered transition from mitosis back to interphase. Both AurA and AurB undergo targeted proteolysis after anaphase onset as substrates of the anaphase-promoting complex/cyclosome (APC/C) ubiquitin ligase, even while they continue to regulate steps during mitotic exit. Temporal control of Aurora kinase destruction ensures that AurB remains active at the midbody during cytokinesis long after AurA activity has been largely eliminated from the cell. Differential destruction of Aurora kinases is achieved despite the fact that they are targeted at the same time and by the same ubiquitin ligase, making these substrates an interesting case study for investigating molecular determinants of ubiquitin-mediated proteolysis in higher eukaryotes. The prevalence of Aurora overexpression in cancers and their potential as therapeutic targets add importance to the task of understanding the molecular determinants of Aurora kinase stability. Here, we review what is known about ubiquitin-mediated targeting of these critical mitotic regulators and discuss the different factors that contribute to proteolytic control of Aurora kinase activity in the cell.
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Affiliation(s)
- Catherine Lindon
- Department of Pharmacology, University of Cambridge , Cambridge , UK
| | - Rhys Grant
- Department of Pharmacology, University of Cambridge , Cambridge , UK
| | - Mingwei Min
- Department of Cell Biology, Harvard Medical School , Boston, MA , USA
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27
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Cedeño C, La Monaca E, Esposito M, Gutierrez GJ. Detection and Analysis of Cell Cycle-Associated APC/C-Mediated Cellular Ubiquitylation In Vitro and In Vivo. Methods Mol Biol 2016; 1449:251-265. [PMID: 27613041 DOI: 10.1007/978-1-4939-3756-1_15] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The anaphase-promoting complex or cyclosome (APC/C) is one of the major orchestrators of the cell division cycle in mammalian cells. The APC/C acts as a ubiquitin ligase that triggers sequential ubiquitylation of a significant number of substrates which will be eventually degraded by proteasomes during major transitions of the cell cycle. In this chapter, we present accessible methodologies to assess both in in vitro conditions and in cellular systems ubiquitylation reactions mediated by the APC/C. In addition, we also describe techniques to evidence the changes in protein stability provoked by modulation of the activity of the APC/C. Finally, specific methods to analyze interactors or posttranslational modifications of particular APC/C subunits are also discussed. Given the crucial role played by the APC/C in the regulation of the cell cycle, this review only focuses on its action and effects in actively proliferating cells.
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Affiliation(s)
- Cesyen Cedeño
- Department of Structural Biology, Vlaams Instituut voor Biotechnologie (VIB), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels, 1050, Belgium
| | - Esther La Monaca
- Laboratory of Pathophysiological Cell Signaling (PACS), Department of Biology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels, 1050, Belgium
| | - Mara Esposito
- Laboratory of Pathophysiological Cell Signaling (PACS), Department of Biology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels, 1050, Belgium
| | - Gustavo J Gutierrez
- Laboratory of Pathophysiological Cell Signaling (PACS), Department of Biology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels, 1050, Belgium.
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28
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Cronin NB, Yang J, Zhang Z, Kulkarni K, Chang L, Yamano H, Barford D. Atomic-Resolution Structures of the APC/C Subunits Apc4 and the Apc5 N-Terminal Domain. J Mol Biol 2015; 427:3300-3315. [PMID: 26343760 PMCID: PMC4590430 DOI: 10.1016/j.jmb.2015.08.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 08/19/2015] [Accepted: 08/26/2015] [Indexed: 10/25/2022]
Abstract
Many essential biological processes are mediated by complex molecular machines comprising multiple subunits. Knowledge on the architecture of individual subunits and their positions within the overall multimeric complex is key to understanding the molecular mechanisms of macromolecular assemblies. The anaphase-promoting complex/cyclosome (APC/C) is a large multisubunit complex that regulates cell cycle progression by ubiquitinating cell cycle proteins for proteolysis by the proteasome. The holo-complex is composed of 15 different proteins that assemble to generate a complex of 20 subunits. Here, we describe the crystal structures of Apc4 and the N-terminal domain of Apc5 (Apc5(N)). Apc4 comprises a WD40 domain split by a long α-helical domain, whereas Apc5(N) has an α-helical fold. In a separate study, we had fitted these atomic models to a 3.6-Å-resolution cryo-electron microscopy map of the APC/C. We describe how, in the context of the APC/C, regions of Apc4 disordered in the crystal assume order through contacts to Apc5, whereas Apc5(N) shows small conformational changes relative to its crystal structure. We discuss the complementary approaches of high-resolution electron microscopy and protein crystallography to the structure determination of subunits of multimeric complexes.
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Affiliation(s)
- Nora B Cronin
- Division of Structural Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom
| | - Jing Yang
- Division of Structural Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom; MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom
| | - Ziguo Zhang
- Division of Structural Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom; MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom
| | - Kiran Kulkarni
- Division of Structural Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom; Division of Biochemical Sciences, Council of Scientific and Industrial Research National Chemical Laboratory, Pune 411008, India
| | - Leifu Chang
- Division of Structural Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom; MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom
| | - Hiroyuki Yamano
- Cancer Institute, University College London, Paul O'Gorman Building, 72 Huntley Street, London WC1E 6BT, United Kingdom
| | - David Barford
- Division of Structural Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, United Kingdom; MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, United Kingdom.
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29
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Ayesha AK, Hyodo T, Asano E, Sato N, Mansour MA, Ito S, Hamaguchi M, Senga T. UBE2S is associated with malignant characteristics of breast cancer cells. Tumour Biol 2015; 37:763-72. [DOI: 10.1007/s13277-015-3863-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 07/29/2015] [Indexed: 02/06/2023] Open
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30
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Nguyen LK. Dynamics of ubiquitin-mediated signalling: insights from mathematical modelling and experimental studies. Brief Bioinform 2015. [DOI: 10.1093/bib/bbv052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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31
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Chang L, Zhang Z, Yang J, McLaughlin SH, Barford D. Atomic structure of the APC/C and its mechanism of protein ubiquitination. Nature 2015; 522:450-454. [PMID: 26083744 PMCID: PMC4608048 DOI: 10.1038/nature14471] [Citation(s) in RCA: 164] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 04/10/2015] [Indexed: 12/12/2022]
Abstract
The anaphase-promoting complex (APC/C) is a multimeric RING E3 ubiquitin ligase that controls chromosome segregation and mitotic exit. Its regulation by coactivator subunits, phosphorylation, the mitotic checkpoint complex and interphase early mitotic inhibitor 1 (Emi1) ensures the correct order and timing of distinct cell-cycle transitions. Here we use cryo-electron microscopy to determine atomic structures of APC/C-coactivator complexes with either Emi1 or a UbcH10-ubiquitin conjugate. These structures define the architecture of all APC/C subunits, the position of the catalytic module and explain how Emi1 mediates inhibition of the two E2s UbcH10 and Ube2S. Definition of Cdh1 interactions with the APC/C indicates how they are antagonized by Cdh1 phosphorylation. The structure of the APC/C with UbcH10-ubiquitin reveals insights into the initiating ubiquitination reaction. Our results provide a quantitative framework for the design of future experiments to investigate APC/C functions in vivo.
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MESH Headings
- Anaphase-Promoting Complex-Cyclosome/chemistry
- Anaphase-Promoting Complex-Cyclosome/metabolism
- Anaphase-Promoting Complex-Cyclosome/ultrastructure
- Antigens, CD
- Apc1 Subunit, Anaphase-Promoting Complex-Cyclosome/chemistry
- Apc1 Subunit, Anaphase-Promoting Complex-Cyclosome/metabolism
- Apc1 Subunit, Anaphase-Promoting Complex-Cyclosome/ultrastructure
- Apc10 Subunit, Anaphase-Promoting Complex-Cyclosome/chemistry
- Apc10 Subunit, Anaphase-Promoting Complex-Cyclosome/metabolism
- Apc10 Subunit, Anaphase-Promoting Complex-Cyclosome/ultrastructure
- Apc11 Subunit, Anaphase-Promoting Complex-Cyclosome/chemistry
- Apc11 Subunit, Anaphase-Promoting Complex-Cyclosome/metabolism
- Apc3 Subunit, Anaphase-Promoting Complex-Cyclosome/chemistry
- Apc3 Subunit, Anaphase-Promoting Complex-Cyclosome/metabolism
- Apc8 Subunit, Anaphase-Promoting Complex-Cyclosome/chemistry
- Apc8 Subunit, Anaphase-Promoting Complex-Cyclosome/metabolism
- Apc8 Subunit, Anaphase-Promoting Complex-Cyclosome/ultrastructure
- Cadherins/chemistry
- Cadherins/metabolism
- Cadherins/ultrastructure
- Catalytic Domain
- Cell Cycle Proteins/chemistry
- Cell Cycle Proteins/metabolism
- Cell Cycle Proteins/ultrastructure
- Cryoelectron Microscopy
- Cytoskeletal Proteins/chemistry
- Cytoskeletal Proteins/metabolism
- F-Box Proteins/chemistry
- F-Box Proteins/metabolism
- F-Box Proteins/ultrastructure
- Humans
- Lysine/metabolism
- Models, Molecular
- Phosphorylation
- Protein Binding
- Protein Subunits/chemistry
- Protein Subunits/metabolism
- Structure-Activity Relationship
- Substrate Specificity
- Ubiquitin/chemistry
- Ubiquitin/metabolism
- Ubiquitin/ultrastructure
- Ubiquitin-Conjugating Enzymes/chemistry
- Ubiquitin-Conjugating Enzymes/metabolism
- Ubiquitin-Conjugating Enzymes/ultrastructure
- Ubiquitination
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Affiliation(s)
- Leifu Chang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Ziguo Zhang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Jing Yang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Stephen H McLaughlin
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - David Barford
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
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32
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Cacciola NA, Calabrese C, Malapelle U, Pellino G, De Stefano A, Sepe R, Sgariglia R, Quintavalle C, Federico A, Bianco A, Uchimura Bastos A, Milone M, Bellevicine C, Milone F, Carlomagno C, Selvaggi F, Troncone G, Fusco A, Pallante P. UbcH10 expression can predict prognosis and sensitivity to the antineoplastic treatment for colorectal cancer patients. Mol Carcinog 2015; 55:793-807. [PMID: 25917796 DOI: 10.1002/mc.22322] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 03/10/2015] [Accepted: 03/16/2015] [Indexed: 01/13/2023]
Abstract
Colorectal cancer (CRC) is one of the most frequent and deadly malignancies worldwide. Despite the progresses made in diagnosis and treatment, the identification of tumor markers is still a strong clinical need, because current treatments are efficacious only in a subgroup of patients. UbcH10 represents a potential candidate biomarker, whose expression levels could be employed to predict response or resistance to chemotherapy or targeted agents. UbcH10 mRNA and protein expression levels have been evaluated in a large group of CRC patients and correlated with clinico-pathological characteristics, including KRAS mutations. Moreover, the endogenous levels of UbcH10 and its role on cell growth have been evaluated in CRC cells. Finally, to investigate the impact of UbcH10 protein expression on the response to irinotecan, its active metabolite SN-38 and cetuximab treatment, UbcH10 silencing experiments were carried-out on two colon carcinoma cell lines, Caco-2, and DLD1. Overexpression of UbcH10 mRNA and protein was observed in the vast majority of patients analyzed. UbcH10 suppression decreased CRC cell growth rate (at least in part through deregulation of Cyclin B and ERK1) and sensitized them to pharmacological treatments with irinotecan, SN-38 and cetuximab (at least in part through a down-regulation of AKT). Taken together, these findings indicate that UbcH10 expression regulates CRC growth and could play an important role in the personalization of the therapy of CRC patients.
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Affiliation(s)
- Nunzio Antonio Cacciola
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Chiara Calabrese
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Umberto Malapelle
- Department of Public Health, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Gianluca Pellino
- Unit of General Surgery, Second University of Naples, Piazza Miraglia 2, Naples, Italy
| | - Alfonso De Stefano
- Department of Clinical Medicine and Surgery, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Romina Sepe
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Roberta Sgariglia
- Department of Public Health, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Cristina Quintavalle
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy.,Institute of Pathology, Molecular Pathology Division, University of Basel, Schonbeinstrasse 40, Basel, Switzerland
| | - Antonella Federico
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Antonio Bianco
- Department of Public Health, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - André Uchimura Bastos
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy.,Genetic Bases of Thyroid Tumors Laboratory, Division of Genetics, Department of Morphology and Genetics, Federal University of São Paulo, São Paulo, Brazil
| | - Marco Milone
- Department of Advanced Biomedical Sciences, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Claudio Bellevicine
- Department of Public Health, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Francesco Milone
- Department of Advanced Biomedical Sciences, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Chiara Carlomagno
- Department of Clinical Medicine and Surgery, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Francesco Selvaggi
- Unit of General Surgery, Second University of Naples, Piazza Miraglia 2, Naples, Italy
| | - Giancarlo Troncone
- Department of Public Health, University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
| | - Alfredo Fusco
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy.,National Cancer Institute-INCA, Rua André Cavalcanti, 37-Centro, CEP 20231-050, Rio de Janeiro, Brazil
| | - Pierlorenzo Pallante
- Institute of Experimental Endocrinology and Oncology (IEOS), National Research Council (CNR), Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples "Federico II", Via S. Pansini 5, Naples, Italy
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33
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Lu Y, Wang W, Kirschner MW. Specificity of the anaphase-promoting complex: a single-molecule study. Science 2015; 348:1248737. [PMID: 25859049 DOI: 10.1126/science.1248737] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 02/21/2015] [Indexed: 11/02/2022]
Abstract
Biological processes require specific enzymatic reactions, paradoxically involving short recognition sequences. As an example, cell-cycle timing depends on a sequence of ubiquitylation events mediated by the anaphase-promoting complex (APC) based on short redundant motifs. To understand the origin of specificity, we designed single-molecule fluorescence assays that capture transient ubiquitylation reactions. We find that the APC-mediated ubiquitylation involves a highly processive initial reaction on the substrate, followed by multiple encounters and reactions at a slower rate. The initial ubiquitylation greatly enhances the substrate's binding affinity in subsequent reactions, by both increasing the on-rate and decreasing the off-rate. We postulate that these cycles of positive feedback enable high specificity for substrates with short recognition motifs in a complex cellular environment.
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Affiliation(s)
- Ying Lu
- Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
| | - Weiping Wang
- Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
| | - Marc W Kirschner
- Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA.
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34
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Sivakumar S, Gorbsky GJ. Spatiotemporal regulation of the anaphase-promoting complex in mitosis. Nat Rev Mol Cell Biol 2015; 16:82-94. [PMID: 25604195 DOI: 10.1038/nrm3934] [Citation(s) in RCA: 201] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The appropriate timing of events that lead to chromosome segregation during mitosis and cytokinesis is essential to prevent aneuploidy, and defects in these processes can contribute to tumorigenesis. Key mitotic regulators are controlled through ubiquitylation and proteasome-mediated degradation. The APC/C (anaphase-promoting complex; also known as the cyclosome) is an E3 ubiquitin ligase that has a crucial function in the regulation of the mitotic cell cycle, particularly at the onset of anaphase and during mitotic exit. Co-activator proteins, inhibitor proteins, protein kinases and phosphatases interact with the APC/C to temporally and spatially control its activity and thus ensure accurate timing of mitotic events.
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Affiliation(s)
- Sushama Sivakumar
- Cell Cycle and Cancer Biology, Oklahoma Medical Research Foundation, 825 NE 13th Street, Oklahoma City, Oklahoma 73104, USA
| | - Gary J Gorbsky
- Cell Cycle and Cancer Biology, Oklahoma Medical Research Foundation, 825 NE 13th Street, Oklahoma City, Oklahoma 73104, USA
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35
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Chang L, Barford D. Insights into the anaphase-promoting complex: a molecular machine that regulates mitosis. Curr Opin Struct Biol 2014; 29:1-9. [PMID: 25174288 DOI: 10.1016/j.sbi.2014.08.003] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 08/01/2014] [Accepted: 08/05/2014] [Indexed: 12/13/2022]
Abstract
The anaphase-promoting complex/cyclosome (APC/C) is a large multimeric complex that functions as a RING domain E3 ubiquitin ligase to regulate ordered transitions through the cell cycle. It does so by controlling the ubiquitin-mediated proteolysis of cell cycle proteins, notably cyclins and securins, whose degradation triggers sister chromatid disjunction and mitotic exit. Regulation of APC/C activity and modulation of its substrate specificity are subject to intricate cell cycle checkpoints and control mechanisms involving the switching of substrate-specifying cofactors, association of regulatory protein complexes and post-translational modifications. This review discusses the recent progress towards understanding the overall architecture of the APC/C, the molecular basis for degron recognition and ubiquitin chain synthesis, and how these activities are regulated.
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Affiliation(s)
- Leifu Chang
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - David Barford
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.
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36
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Structural and Functional Framework for the Autoinhibition of Nedd4-Family Ubiquitin Ligases. Structure 2014; 22:1639-49. [DOI: 10.1016/j.str.2014.09.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 09/03/2014] [Accepted: 09/10/2014] [Indexed: 01/22/2023]
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37
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Min M, Mayor U, Dittmar G, Lindon C. Using in vivo biotinylated ubiquitin to describe a mitotic exit ubiquitome from human cells. Mol Cell Proteomics 2014; 13:2411-25. [PMID: 24857844 PMCID: PMC4159658 DOI: 10.1074/mcp.m113.033498] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 05/19/2014] [Indexed: 11/06/2022] Open
Abstract
Mitotic division requires highly regulated morphological and biochemical changes to the cell. Upon commitment to exit mitosis, cells begin to remove mitotic regulators in a temporally and spatially controlled manner to bring about the changes that reestablish interphase. Ubiquitin-dependent pathways target these regulators to generate polyubiquitin-tagged substrates for degradation by the 26S proteasome. However, the lack of cell-based assays to investigate in vivo ubiquitination limits our knowledge of the identity of substrates of ubiquitin-mediated regulation in mitosis. Here we report an in vivo ubiquitin tagging system used in human cells that allows efficient purification of ubiquitin conjugates from synchronized cell populations. Coupling purification with mass spectrometry, we have identified a series of mitotic regulators targeted for polyubiquitination in mitotic exit. We show that some are new substrates of the anaphase-promoting complex/cyclosome and validate KIFC1 and RacGAP1/Cyk4 as two such targets involved respectively in timely mitotic spindle disassembly and cell spreading. We conclude that in vivo biotin tagging of ubiquitin can provide valuable information about the role of ubiquitin-mediated regulation in processes required for rebuilding interphase cells.
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Affiliation(s)
- Mingwei Min
- From the ‡Department of Genetics, University of Cambridge, Downing St., Cambridge CB2 3EH, UK
| | - Ugo Mayor
- §CIC Biogune, Bizkaia Teknology Park, 48160 Derio, Basque Country, Spain; ¶Ikerbasque, Basque Foundation for Science, 48011, Bilbao, Spain
| | - Gunnar Dittmar
- ‖Max Delbrück Center for Molecular Medicine, 13125 Berlin, Germany
| | - Catherine Lindon
- From the ‡Department of Genetics, University of Cambridge, Downing St., Cambridge CB2 3EH, UK;
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38
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Emi2 mediates meiotic MII arrest by competitively inhibiting the binding of Ube2S to the APC/C. Nat Commun 2014; 5:3667. [PMID: 24770399 DOI: 10.1038/ncomms4667] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 03/17/2014] [Indexed: 11/08/2022] Open
Abstract
In vertebrates, unfertilized eggs are arrested at metaphase of meiosis II by Emi2, a direct inhibitor of the APC/C ubiquitin ligase. Two different ubiquitin-conjugating enzymes, UbcH10 and Ube2S, work with the APC/C to target APC/C substrates for degradation. However, their possible roles and regulations in unfertilized/fertilized eggs are not known. Here we use Xenopus egg extracts to show that both UbcH10 and Ube2S are required for rapid cyclin B degradation at fertilization, when APC/C binding of Ube2S, but not of UbcH10, increases several fold, coincidently with (SCF(β-TrCP)-dependent) Emi2 degradation. Interestingly, before fertilization, Emi2 directly inhibits APC/C-Ube2S binding via the C-terminal tail, but on fertilization, its degradation allows the binding mediated by the Ube2S C-terminal tail. Significantly, Emi2 and Ube2S bind commonly to the APC/C catalytic subunit APC10 via their similar C-terminal tails. Thus, Emi2 competitively inhibits APC/C-Ube2S binding before fertilization, while its degradation on fertilization relieves the inhibition for APC/C activation.
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39
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Xie C, Powell C, Yao M, Wu J, Dong Q. Ubiquitin-conjugating enzyme E2C: a potential cancer biomarker. Int J Biochem Cell Biol 2013; 47:113-7. [PMID: 24361302 DOI: 10.1016/j.biocel.2013.11.023] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 11/28/2013] [Indexed: 10/25/2022]
Abstract
The ubiquitin-conjugating enzymes 2C (UBE2C) is an integral component of the ubiquitin proteasome system. UBE2C consists of a conserved core domain containing the catalytic Cys residue and an N-terminal extension. The core domain is required for ubiquitin adduct formation by interacting with the ubiquitin-fold domain in the E1 enzyme, and contributes to the E3 enzyme binding. UBE2C N-terminal extension regulates E3 enzyme activity as a part of an intrinsic inhibitory mechanism. UBE2C is required for the destruction of mitotic cyclins and securin, which are essential for spindle assembly checkpoint and mitotic exit. The UBE2C mRNA and/or protein levels are aberrantly increased in many cancer types with poor clinical outcomes. Accumulation of UBE2C stimulates cell proliferation and anchorage-independent growth. UBE2C transgenic mice are prone to develop spontaneous tumors and carcinogen-induced tumor with evidence of chromosome aneuploidy.
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Affiliation(s)
- Chanlu Xie
- School of Science and Health, The University of Western Sydney, Australia
| | - Chris Powell
- School of Science and Health, The University of Western Sydney, Australia
| | - Mu Yao
- Central Clinical School and Bosch Institute, The University of Sydney and Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia
| | - Jianmin Wu
- The Kinghorn Cancer Centre & Cancer Division, Garvan Institute of Medical Research, Sydney, Australia; St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Qihan Dong
- School of Science and Health, The University of Western Sydney, Australia; Central Clinical School and Bosch Institute, The University of Sydney and Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia.
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40
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Min M, Mayor U, Lindon C. Ubiquitination site preferences in anaphase promoting complex/cyclosome (APC/C) substrates. Open Biol 2013; 3:130097. [PMID: 24004664 PMCID: PMC3787748 DOI: 10.1098/rsob.130097] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 08/06/2013] [Indexed: 01/13/2023] Open
Abstract
Ordered progression of mitosis requires precise control in abundance of mitotic regulators. The anaphase promoting complex/cyclosome (APC/C) ubiquitin ligase plays a key role by directing ubiquitin-mediated destruction of targets in a temporally and spatially defined manner. Specificity in APC/C targeting is conferred through recognition of substrate D-box and KEN degrons, while the specificity of ubiquitination sites, as another possible regulated dimension, has not yet been explored. Here, we present the first analysis of ubiquitination sites in the APC/C substrate ubiquitome. We show that KEN is a preferred ubiquitin acceptor in APC/C substrates and that acceptor sites are enriched in predicted disordered regions and flanked by serine residues. Our experimental data confirm a role for the KEN lysine as an ubiquitin acceptor contributing to substrate destruction during mitotic progression. Using Aurora A and Nek2 kinases as examples, we show that phosphorylation on the flanking serine residue could directly regulate ubiquitination and subsequent degradation of substrates. We propose a novel layer of regulation in substrate ubiquitination, via phosphorylation adjacent to the KEN motif, in APC/C-mediated targeting.
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Affiliation(s)
- Mingwei Min
- Department of Genetics, University of Cambridge, Downing Street, Cambridge CB2 3EH, UK
| | - Ugo Mayor
- CIC bioGUNE, Bizkaia Technology Park, Building 801-A, Derio 48160, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
| | - Catherine Lindon
- Department of Genetics, University of Cambridge, Downing Street, Cambridge CB2 3EH, UK
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41
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Electron microscopy structure of human APC/C(CDH1)-EMI1 reveals multimodal mechanism of E3 ligase shutdown. Nat Struct Mol Biol 2013; 20:827-35. [PMID: 23708605 PMCID: PMC3742808 DOI: 10.1038/nsmb.2593] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 04/09/2013] [Indexed: 12/20/2022]
Abstract
The Anaphase Promoting Complex/Cyclosome (APC/C) is a ~1.5 MDa multiprotein E3 ligase enzyme that regulates cell division by promoting timely ubiquitin-mediated proteolysis of key cell cycle regulatory proteins. Inhibition of human APC/CCDH1 during interphase by Early Mitotic Inhibitor 1 (EMI1) is essential for accurate coordination of DNA synthesis and mitosis. Here, we report a hybrid structural approach involving NMR, electron microscopy, and enzymology, which reveal that EMI1’s 143-residue C-terminal domain inhibits multiple APC/CCDH1 functions. The intrinsically disordered D-box, Linker, and Tail elements, together with a structured zinc-binding domain, bind distinct regions of APC/CCDH1 to synergistically both block the substrate-binding site and inhibit ubiquitin chain elongation. The functional importance of intrinsic structural disorder is explained by enabling a small inhibitory domain to bind multiple sites to shut down multiple functions of a “molecular machine” nearly 100 times its size.
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42
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Emi1 preferentially inhibits ubiquitin chain elongation by the anaphase-promoting complex. Nat Cell Biol 2013; 15:797-806. [PMID: 23708001 PMCID: PMC3812805 DOI: 10.1038/ncb2755] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 04/10/2013] [Indexed: 12/14/2022]
Abstract
The anaphase promoting complex (APC) is the crucial ubiquitin ligase targeting the regulatory machinery of the cell cycle. Emi1, a major modulator of APC activity, is thought to act competitively as a pseudosubstrate. We show that the modulation of APC activity is more subtle: Emi1 inhibits ubiquitylation at both substrate binding and separately at the step of ubiquitin transfer to APC-bound substrates. The zinc-binding region of Emi1 allows multiple monoubiquitylation of substrates, but preferentially suppresses the ubiquitin chain elongation by UBCH10. Furthermore, the C-terminal tail of Emi1 antagonizes chain elongation by Ube2S, via competitively preventing its binding to APC cullin subunit through electrostatic interaction. Combinatorially, Emi1 effectively stabilizes APC substrates by suppressing ubiquitin chain extension. Deubiquitylating enzymes can then convert inhibited substrates to their basal state. Chain elongation may be a particularly sensitive step for controlling degradation and this study provides the first kinetic evidence for how it is inhibited.
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43
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Tu Y, Chen C, Pan J, Xu J, Zhou ZG, Wang CY. The Ubiquitin Proteasome Pathway (UPP) in the regulation of cell cycle control and DNA damage repair and its implication in tumorigenesis. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2012; 5:726-738. [PMID: 23071855 PMCID: PMC3466981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 09/11/2012] [Indexed: 06/01/2023]
Abstract
Accumulated evidence supports that the ubiquitin proteasome pathway (UPP) plays a crucial role in protein metabolism implicated in the regulation of many biological processes such as cell cycle control, DNA damage response, apoptosis, and so on. Therefore, alterations for the ubiquitin proteasome signaling or functional impairments for the ubiquitin proteasome components are involved in the etiology of many diseases, particularly in cancer development. In this minireview, we first give a brief outline for the ubiquitin proteasome pathway, we then discuss with focus for the ubiquitin proteasome pathway in the regulation of cell cycle control and DNA damage response, the relevance for the altered regulation of these signaling pathways in tumorigenesis is also reviewed. We finally assess and summarize the advancement for targeting the ubiquitin proteasome pathway in cancer therapy. A better understanding of the biological functions underlying ubiquitin regulatory mechanisms would provide us a wider prospective on cancer treatment.
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Affiliation(s)
- Yaqin Tu
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Cai Chen
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Junru Pan
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Junfa Xu
- The Department of Clinical Immunology, Guangdong Medical College1 Xincheng Ave. Dongguan, 523808, Guangdong, China
| | - Zhi-Guang Zhou
- Diabetes Center, the Second Xiangya Hospital and Key Laboratory of Diabetes Immunology, Central South UniversityChangsha, China
| | - Cong-Yi Wang
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
- The Department of Clinical Immunology, Guangdong Medical College1 Xincheng Ave. Dongguan, 523808, Guangdong, China
- The Center for Biotechnology & Genomic Medicine, Georgia Health Sciences University1120 15th Street, CA4098, Augusta, GA 30912, USA
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44
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Min M, Lindon C. Substrate targeting by the ubiquitin-proteasome system in mitosis. Semin Cell Dev Biol 2012; 23:482-91. [PMID: 22326960 DOI: 10.1016/j.semcdb.2012.01.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Revised: 01/11/2012] [Accepted: 01/23/2012] [Indexed: 12/15/2022]
Abstract
Both cell cycle progression and the ubiquitin-proteasome system (UPS) that drives it are precisely regulated. Enzymatically, many ubiquitylation and degradation reactions have been characterized in in vitro systems, providing insights into the fundamental mechanisms of the UPS. Biologically, a range of degradation events depending on a ubiquitin ligase called the Anaphase-Promoting Complex (APC/C), have been shown to control mitotic progression through removal of key substrates with extreme temporal precision. However we are only just beginning to understand how the different enzymatic activities of the UPS act collectively - and in cooperation with other cellular factors - for accurate temporal and spatial control of mitotic substrate levels in vivo.
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Affiliation(s)
- Mingwei Min
- University of Cambridge, Department of Genetics, Downing St., Cambridge CB2 3EH, UK
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