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Shao M, Qi K, Wang L, Yu X, Zhang Q, Yu L, Wang L, Yang C, Fan L. E3 ubiquitin ligase CHIP interacts with transferrin receptor 1 for degradation and promotes cell proliferation through inhibiting ferroptosis in hepatocellular carcinoma. Cell Signal 2024; 118:111148. [PMID: 38521179 DOI: 10.1016/j.cellsig.2024.111148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 03/02/2024] [Accepted: 03/20/2024] [Indexed: 03/25/2024]
Abstract
Hepatocellular carcinoma (HCC) is the major form of liver malignancy with high incidence and mortality. Identifying novel biomarkers and understanding regulatory mechanisms underlying the development and progression of HCC are critical for improving diagnosis, treatment and patient outcomes. Carboxyl terminus of Hsc-70-interacting protein (CHIP) is a well-described U-box-type E3 ubiquitin ligase which promotes the ubiquitination and degradation of numerous tumor-associated proteins. Recent studies have shown that CHIP can play as a tumor-suppressor gene or an oncogene in different kinds of malignancies. To date, the function and mechanism of CHIP in hepatocellular carcinoma remains largely unknown. Based on TCGA data, we found that compared with high CHIP expression, the overall survival of HCC patients with low expression of CHIP was better. In addition, CHIP overexpression markedly enhanced HCC cell proliferation and colony formation. Conversely, knockdown of CHIP restrained the proliferation and colony formation of HCC cells. Meanwhile, knockdown of CHIP decreased mitochondrial cristae or ruptured outer mitochondrial membrane, promoted the accumulation of Fe2+ and ferroptosis of HCC cells. Further research for the first time confirmed that CHIP interacts and degrades transferrin receptor 1 (TfR1) by ubiquitin-proteasome pathway, which leads to the inhibition of ferroptosis and promotes the proliferation of HCC cells. The analysis of proteomics data from CPTAC revealed a negative correlation between CHIP and TfR1 protein expression levels in HCC. These findings indicate that CHIP acts as a negative modulator of ferroptosis and functions as an oncogene in HCC.
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Affiliation(s)
- Miaomiao Shao
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, PR China.
| | - Kangwei Qi
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Lanxin Wang
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Xiaoxuan Yu
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Qingyu Zhang
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Long Yu
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Lan Wang
- NHC Key Laboratory of Glycoconjugate Research, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, PR China
| | - Caiting Yang
- Institutes of Biomedical Sciences, Shanxi University, Taiyuan 030006, PR China; Shanxi Provincial Key Laboratory of Medical Molecular Cell Biology, Shanxi University, Taiyuan 030006, PR China.
| | - Lu Fan
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, PR China.
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Guo Y, Cheng R, Wang Y, Gonzalez ME, Zhang H, Liu Y, Kleer CG, Xue L. Regulation of EZH2 protein stability: new mechanisms, roles in tumorigenesis, and roads to the clinic. EBioMedicine 2024; 100:104972. [PMID: 38244292 PMCID: PMC10835131 DOI: 10.1016/j.ebiom.2024.104972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/13/2023] [Accepted: 01/04/2024] [Indexed: 01/22/2024] Open
Abstract
The importance of EZH2 as a key methyltransferase has been well documented theoretically. Practically, the first EZH2 inhibitor Tazemetostat (EPZ6438), was approved by FDA in 2020 and is used in clinic. However, for most solid tumors it is not as effective as desired and the scope of clinical indications is limited, suggesting that targeting its enzymatic activity may not be sufficient. Recent technologies focusing on the degradation of EZH2 protein have drawn attention due to their potential robust effects. This review focuses on the molecular mechanisms that regulate EZH2 protein stability via post-translational modifications (PTMs), mainly including ubiquitination, phosphorylation, and acetylation. In addition, we discuss recent advancements of multiple proteolysis targeting chimeras (PROTACs) strategies and the latest degraders that can downregulate EZH2 protein. We aim to highlight future directions to expand the application of novel EZH2 inhibitors by targeting both EZH2 enzymatic activity and protein stability.
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Affiliation(s)
- Yunyun Guo
- Cancer Center of Peking University Third Hospital, Beijing, China; Center of Basic Medical Research, Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing, China
| | - Rui Cheng
- Cancer Center of Peking University Third Hospital, Beijing, China; Center of Basic Medical Research, Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing, China
| | - Yuqing Wang
- Center of Basic Medical Research, Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing, China
| | - Maria E Gonzalez
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Hongshan Zhang
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Yang Liu
- Cancer Center of Peking University Third Hospital, Beijing, China; Center of Basic Medical Research, Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing, China.
| | - Celina G Kleer
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
| | - Lixiang Xue
- Cancer Center of Peking University Third Hospital, Beijing, China; Center of Basic Medical Research, Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing, China.
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Kal S, Chakraborty S, Karmakar S, Ghosh MK. Wnt/β-catenin signaling and p68 conjointly regulate CHIP in colorectal carcinoma. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119185. [PMID: 34890713 DOI: 10.1016/j.bbamcr.2021.119185] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 11/23/2021] [Accepted: 11/28/2021] [Indexed: 12/12/2022]
Abstract
Emerging evidences suggest abundant expression of Carboxy terminus of Hsc70 Interacting Protein or CHIP (alias STIP1 Homology and U-box Containing Protein 1 or STUB1) in colorectal carcinoma, but the mechanistic detail of this augmented expression pattern is unclear. The signature driver of canonical Wnt pathway, β-catenin, and its co-activator RNA helicase p68, are also overexpressed in colorectal carcinoma. In this study, we describe a novel mechanism of Wnt/β-catenin and p68 mediated transcriptional activation of CHIP gene leading to enhanced proliferation of colorectal carcinoma cells. Bioinformatic analyses reconfirmed an elevated CHIP expression level in colorectal carcinoma datasets. Wnt3A treatment and pharmacological activation of canonical Wnt signaling pathway resulted in increased nuclear translocation of β-catenin, augmenting CHIP expression. Likewise, immunoblotting and Real time PCR following overexpression and knockdown of β-catenin and p68 demonstrated upregulated and downregulated CHIP expression, respectively, at both mRNA and protein levels. p68 along with β-catenin were found to occupy Transcription Factor 4 (TCF4) binding sites on endogenous CHIP promoter and regulate its transcription. After cloning CHIP promoter, the increased and decreased promoter activities of CHIP induced by overexpression and knockdown of either β-catenin or p68 further confirmed transcriptional regulation of CHIP gene by Wnt/β-catenin signaling cascade. Finally, enhanced cellular propagation and migration of colorectal carcinoma cells induced by 'Wnt/β-catenin-p68-CHIP' axis established the significance of this pathway in oncogenesis. To the best of our knowledge, this is the first report elucidating the mechanistic details of transcriptional regulation of CHIP (STUB1) gene expression.
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Affiliation(s)
- Satadeepa Kal
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Shrabastee Chakraborty
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Subhajit Karmakar
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Mrinal K Ghosh
- Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata- 700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India.
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Xu Y, Xu G, Dang H, Qu W, Chang D, He X, Li M, Wang Q. Carboxy terminus of HSP70-interacting protein (CHIP) attenuates the stemness of thyroid cancer cells through decreasing OCT4 protein stability. ENVIRONMENTAL TOXICOLOGY 2021; 36:686-693. [PMID: 33270330 DOI: 10.1002/tox.23072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Cancer cell stemness results in the occurrence and progression of tumors and Oct4 (octamer-binding transcription factor) has been confirmed to be a critical contributor and marker of cancer cell stemness. Here, we aimed to explore the underlying mechanisms contributing to Oct4 protein stability, which is necessary for thyroid cancer (TC) cell stemness. We indicated that carboxy terminus of HSP70-interacting protein (CHIP) protein was lowly expressed in TC tissues and cells, and positively correlated with the overall survival of TC patients. By analyzing the co-expression network in TC tissues, we found that CHIP and Oct4 expression exhibited a negative correlation. Functional experiments showed that CHIP knockdown promoted the stemness of TC cells, while CHIP overexpression reduced the stemness of TC spheroids formed by TC cells, in which CHIP expression was significantly decreased. Furthermore, CHIP had no effect on TC cell viability. Mechanistic studies revealed that CHIP directly interacted with Oct4 protein and induced Oct4 ubiquitination, whereas a catalytic CHIP mutant (H260Q) did not. And CHIP regulated the stemness of TC cells in an Oct4-dependent manner. Overall, this work indicates that the CHIP/Oct4 axis is essential for TC cell stemness.
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Affiliation(s)
- Ying Xu
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Gang Xu
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Huimin Dang
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Wei Qu
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Dan Chang
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xin He
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Minmin Li
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Qian Wang
- Department of the Health Management, Neurosurgery, Traditional Chinese Medicine, Nuclear Medicine, Ultrasonic Examination Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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Li Z, Li M, Wang D, Hou P, Chen X, Chu S, Chai D, Zheng J, Bai J. Post-translational modifications of EZH2 in cancer. Cell Biosci 2020; 10:143. [PMID: 33308321 PMCID: PMC7731458 DOI: 10.1186/s13578-020-00505-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 11/27/2020] [Indexed: 02/07/2023] Open
Abstract
Enhancer of zeste homolog 2 (EZH2), as a main component of Polycomb Repressive Complex 2, catalyzes histone H3K27me3 to silence its target gene expression. EZH2 upregulation results in cancer development and poor prognosis of cancer patients. Post-translational modifications (PTMs) are important biological events in cancer progression. PTMs regulate protein conformation and diversity functions. Recently, mounting studies have demonstrated that EZH2 stability, histone methyltransferase activity, localization, and binding partners can be regulated by PTMs, including phosphorylation, O-GlcNAcylation, acetylation, methylation and ubiquitination. However, the detailed molecular mechanisms of the EZH2-PTMs and whether other types of PTMs occur in EZH2 remain largely unclear. This review presents an overview of different roles of EZH2 modification and EZH2-PTMs crosstalk during tumorigenesis and cancer metastasis. We also discussed the therapeutic potential of targeting EZH2 modifications for cancer therapy.
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Affiliation(s)
- Zhongwei Li
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China.,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, Jiangsu Province, China
| | - Minle Li
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China.,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, Jiangsu Province, China
| | - Diandian Wang
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China
| | - Pingfu Hou
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China.,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, Jiangsu Province, China
| | - Xintian Chen
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China
| | - Sufang Chu
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China
| | - Dafei Chai
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China.,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, Jiangsu Province, China
| | - Junnian Zheng
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China. .,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, Jiangsu Province, China.
| | - Jin Bai
- Cancer Institute, Xuzhou Medical University, 84 West Huaihai Road, Xuzhou, 221002, Jiangsu Province, China. .,Center of Clinical Oncology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, Jiangsu Province, China.
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Strous GJ, Almeida ADS, Putters J, Schantl J, Sedek M, Slotman JA, Nespital T, Hassink GC, Mol JA. Growth Hormone Receptor Regulation in Cancer and Chronic Diseases. Front Endocrinol (Lausanne) 2020; 11:597573. [PMID: 33312162 PMCID: PMC7708378 DOI: 10.3389/fendo.2020.597573] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 10/14/2020] [Indexed: 12/14/2022] Open
Abstract
The GHR signaling pathway plays important roles in growth, metabolism, cell cycle control, immunity, homeostatic processes, and chemoresistance via both the JAK/STAT and the SRC pathways. Dysregulation of GHR signaling is associated with various diseases and chronic conditions such as acromegaly, cancer, aging, metabolic disease, fibroses, inflammation and autoimmunity. Numerous studies entailing the GHR signaling pathway have been conducted for various cancers. Diverse factors mediate the up- or down-regulation of GHR signaling through post-translational modifications. Of the numerous modifications, ubiquitination and deubiquitination are prominent events. Ubiquitination by E3 ligase attaches ubiquitins to target proteins and induces proteasomal degradation or starts the sequence of events that leads to endocytosis and lysosomal degradation. In this review, we discuss the role of first line effectors that act directly on the GHR at the cell surface including ADAM17, JAK2, SRC family member Lyn, Ubc13/CHIP, proteasome, βTrCP, CK2, STAT5b, and SOCS2. Activity of all, except JAK2, Lyn and STAT5b, counteract GHR signaling. Loss of their function increases the GH-induced signaling in favor of aging and certain chronic diseases, exemplified by increased lung cancer risk in case of a mutation in the SOCS2-GHR interaction site. Insight in their roles in GHR signaling can be applied for cancer and other therapeutic strategies.
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Affiliation(s)
- Ger J. Strous
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
- BIMINI Biotech B.V., Leiden, Netherlands
| | - Ana Da Silva Almeida
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Joyce Putters
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Julia Schantl
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Magdalena Sedek
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Johan A. Slotman
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Tobias Nespital
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Gerco C. Hassink
- Department of Cell Biology, Centre for Molecular Medicine, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Jan A. Mol
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
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CHIP-mediated CIB1 ubiquitination regulated epithelial-mesenchymal transition and tumor metastasis in lung adenocarcinoma. Cell Death Differ 2020; 28:1026-1040. [PMID: 33082516 PMCID: PMC7937682 DOI: 10.1038/s41418-020-00635-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 09/30/2020] [Accepted: 10/05/2020] [Indexed: 11/18/2022] Open
Abstract
CIB1 is a homolog of calmodulin that regulates cell adhesion, migration, and differentiation. It has been considered as an oncogene in many tumor cells; however, its role in lung adenocarcinoma (LAC) has not been studied. In this study, the expression levels of CIB1 in LAC tissues and adjacent normal tissues were examined by immunohistochemistry, and the relationship between CIB1 expression and patient clinicopathological characteristics was analyzed. The effects of CIB1 on epithelial–mesenchymal transition (EMT), migration, and metastasis of LAC cells were determined in vitro and vivo. Proteins interacting with CIB1 were identified using electrospray mass spectrometry (LS-MS), and CHIP was selected in the following assays. Carboxyl-terminus of Hsp70-interacting protein (CHIP) is a ubiquitin E3 ligase. We show that CHIP can degrade CIB1 via promoting polyubiquitination of CIB1 and its subsequent proteasomal degradation. Besides, lysine residue 10 and 65 of CIB1 is the ubiquitinated site of CIB1. Furthermore, CHIP-mediated CIB1 downregulation is critical for the suppression of metastasis and migration of LAC. These results indicated that CHIP-mediated CIB1 ubiquitination could regulate epithelial–mesenchymal and tumor metastasis in LAC.
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Xu J, Wang H, Li W, Liu K, Zhang T, He Z, Guo F. E3 ubiquitin ligase CHIP attenuates cellular proliferation and invasion abilities in triple-negative breast cancer cells. Clin Exp Med 2020; 20:109-119. [PMID: 31845129 DOI: 10.1007/s10238-019-00594-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 11/03/2019] [Indexed: 12/24/2022]
Abstract
Carboxyl terminus of Hsc-70-interacting protein (CHIP), as U-box-type ubiquitin ligase, connects the chaperone and proteasome systems and plays a pivotal role in maintaining protein homeostasis in the cytoplasm. CHIP induces the ubiquitination and degradation of diverse oncogenic substrate proteins and therefore involves in the progression of tumorigenesis. In this study, the CHIP expression was examined in different human breast cancer cell lines and a group of breast cancer tissues. We found, for the first time, that CHIP expression was correlated with the molecular subtyping of breast cancer. CHIP was least expressed in the base-like subtype of breast cancer, which are triple-negative breast cancer (TNBC) breast cancer predominantly. Accordingly, CHIP expression was evidently decreased in the TNBC MDA-MB-231 breast cancer cell line. Enforced induction of CHIP in the MDA-MB-231 cells exerted no obvious influences on cellular growth and cell cycle. The apoptotic and proliferation cells in hCHIP cells were both reduced compared to the ctrl cells. The mRNA and protein expressions of the anti-apoptotic Bcl-2 and Bcl-xL were markedly increased in the hCHIP cells compared to that of the ctrl cells. The expression of RelA was significantly reduced in the nuclear extract in hCHIP cells compared to that in the ctrl cells. The protein expressions of IKKβ were markedly decreased in the hCHIP cells compared to the ctrl cells. The reduced cellular proliferation was largely due to the attenuated IKKβ-p65/NF-κB activity. Meanwhile, the invasion ability but not the migration ability was diminished when CHIP was overexpressed in the MDA-MB-231 cells. The activity of MMP2 but not MMP9 was significantly decreased in the hCHIP cells compared to the ctrl cells. Taken together, these observations here provide functional evidence for CHIP behaved as a tumor suppressor in the TNBC breast cancer cells. CHIP influenced diverse biological aspects of the MDA-MB-231 breast cancer cells. Importantly, CHIP expression is a useful indicator of the molecular subtyping of breast cancer.
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Affiliation(s)
- Jingjing Xu
- Center for Clinical Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Huan Wang
- Department of Oncology, Suining People's Hospital, Suining, 221200, China
| | - Wenjing Li
- Department of Oncology, Nanjing Medical University Affiliated Suzhou Hospital, Suzhou, 215001, China
| | - Kaili Liu
- Department of Oncology, Nanjing Medical University Affiliated Suzhou Hospital, Suzhou, 215001, China
| | - Tingli Zhang
- Department of Oncology, Nanjing Medical University Affiliated Suzhou Hospital, Suzhou, 215001, China
| | - Zhijie He
- Department of Oncology, Nanjing Medical University Affiliated Suzhou Hospital, Suzhou, 215001, China.
| | - Feng Guo
- Department of Oncology, Nanjing Medical University Affiliated Suzhou Hospital, Suzhou, 215001, China.
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Dai H, Chen H, Xu J, Zhou J, Shan Z, Yang H, Zhou X, Guo F. The ubiquitin ligase CHIP modulates cellular behaviors of gastric cancer cells by regulating TRAF2. Cancer Cell Int 2019; 19:132. [PMID: 31130821 PMCID: PMC6524225 DOI: 10.1186/s12935-019-0832-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 04/20/2019] [Indexed: 12/13/2022] Open
Abstract
Background CHIP is an E3 ubiquitin ligase that plays contrast roles in diverse human malignancies, depending on its targets. To date, the mechanisms underlying the function of CHIP in gastric cancer remains unclear. Here, we aim to further clarify the effects of CHIP on the development and progression of gastric cancer and explore its potential target. Methods Stably transfected CHIP-shRNA and TRAF2-shRNA AGS gastric cancer cell lines were established using Lipofectamine 2000. Cell growth was measured by an xCelligence real-time monitoring system and colony formation assay. Cell proliferation was detected using CCK-8, Ki-67, or CFSE assays. Apoptosis was detected by TUNEL assay or Annexin V/PI-staining followed by flow cytometric analysis. Cell cycle distribution was detected by PI-staining followed by flow cytometric analysis. Cell migration and invasion abilities were measured by a real-time xCelligence system, Transwell insert, and scratch assays. The expression of cell cycle-related proteins, apoptosis-related proteins, AKT, ERK, NF-κB signaling subunits, MMP2, MMP9, and Integrin β-1 were detected by Western blotting analysis. NF-κB DNA-binding capability was quantified using an ELISA-based NF-κB activity assay. Gastric cancer tissue microarray was analyzed to investigate the expression of both CHIP and TRAF2, and their clinical significance. Results The CHIP-silencing in the AGS cells was oncogenic evidenced by the appearance of capable of anchorage-independent growth. The CHIP-silencing significantly enhanced the AGS cell proliferation capability likely due to the induced phosphorylation of ERK. The CHIP-silencing significantly inhibited apoptosis due to increased expression of Bcl-2. The CHIP-silencing promoted the AGS cell migration and invasion abilities, likely by regulating the expression of Integrin β-1. TRAF2 expression was markedly decreased in the CHIP-overexpressing cells at protein level, but not at mRNA level. The TRAF2-silencing markedly inhibited the proliferation ability of the AGS cells, the defected cell proliferation and enhanced apoptosis were involved in. The TRAF2-silencing also attenuated the cell migration and invasion capacities of the AGS cells. Furthermore, the expression of CHIP was downregulated while the expression of TRAF2 was upregulated in gastric cancer tissues. TRAF2 expression is independent prognostic factors of gastric cancer. The expression of CHIP and TRAF2 was negatively correlated in the gastric cancer tissue. Lower CHIP or higher TRAF2 was significantly linked to shorter overall survival in gastric cancer patients. Conclusions TRAF2 influenced diverse aspects of cellular behavior of gastric cancer cells, including cell growth, migration, and invasion, which was in contrast to the functions of CHIP. TRAF2 could be considered as an independent prognostic factor in gastric cancer patients. It is possible that TRAF2 was a substrate of CHIP and CHIP regulated the TRAF2/NF-κB axis, which modulated diverse cellular behaviors in the AGS gastric cancer cells. Electronic supplementary material The online version of this article (10.1186/s12935-019-0832-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hanjue Dai
- 1Oncology center, Changzhou Second People's Hospital Affiliated Nanjing Medical University, Changzhou, 213003 China
| | - Hao Chen
- Department of Oncology, The Second People's Hospital of Taizhou, Taizhou, 225500 China
| | - Jingjing Xu
- 3Center for Clinical Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Jun Zhou
- 3Center for Clinical Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Zhili Shan
- 4Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Hengying Yang
- 4Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Xiaojun Zhou
- 4Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Feng Guo
- 5Department of Oncology, Nanjing Medical University Affiliated Suzhou Hospital, Baita West Road 16, Suzhou, 215001 China
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Cohen M, Amir S, Golan M, Ben-Neriah Y, Mabjeesh NJ. β-TrCP upregulates HIF-1 in prostate cancer cells. Prostate 2019; 79:403-413. [PMID: 30488478 DOI: 10.1002/pros.23746] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 11/02/2018] [Indexed: 11/06/2022]
Abstract
The substantial availability of hypoxia-inducible factor 1 (HIF-1) for pathophysiological states, such as malignancies and ischemia, is primarily regulated post-translationally through the ubiquitin proteolytic system. The balance between degradation and stabilization of HIF-1α protein is determined by specific E3 ligases. In our search for new E3 ligases that might affect HIF-1α protein expression, we studied the effects of beta-transducin repeat-containing protein (β-TrCP) on the hypoxic pathway in cancer cells. β-TrCP is overexpressed in many tumors and regulates various cellular processes through mediating the degradation of important targets. Unexpectedly, we found that β-TrCP overexpression increases HIF-1α protein expression level as well as HIF-1 transcriptional activity by stabilizing HIF-1α protein and preventing its ubiquitination and proteasomal degradation in prostate cancer cells. By using a proteomic approach, we succeeded in demonstrating that β-TrCP interferes with the association between HIF-1α and HSP70/CHIP, a HIF-1α established E3 ligase complex. Whereas the E3 ligase activity of β-TrCP is well known, antagonizing another E3 ligase is a new mechanism of action of this important E3. We suggest that destroying or suppressing β-TrCP and thereby interrupting the HIF-1 pathway, could be valuable antitumor therapy.
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Affiliation(s)
- Maya Cohen
- Prostate Cancer Research Laboratory, Department of Urology, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Sharon Amir
- Prostate Cancer Research Laboratory, Department of Urology, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Maya Golan
- Prostate Cancer Research Laboratory, Department of Urology, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yinon Ben-Neriah
- The Lautenberg Center for Immunology and Cancer Research, IMRIC, Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Nicola J Mabjeesh
- Prostate Cancer Research Laboratory, Department of Urology, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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11
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Xu J, Zhou J, Dai H, Liu F, Li W, Wang W, Guo F. CHIP functions as an oncogene by promoting colorectal cancer metastasis via activation of MAPK and AKT signaling and suppression of E-cadherin. J Transl Med 2018; 16:169. [PMID: 29921293 PMCID: PMC6008917 DOI: 10.1186/s12967-018-1540-5] [Citation(s) in RCA: 29] [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: 04/19/2018] [Accepted: 06/06/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The carboxyl terminus of Hsc70-interacting protein (CHIP) is an E3 ubiquitin ligase that plays a controversial role in different cancers, either as a tumor suppressor or a tumor promoter. To date, the exact function and underlying mechanism of CHIP in colorectal cancer (CRC) is not yet clear. Here we aimed to determine whether CHIP could affect the biological behaviors of CRC cells and its underlying mechanisms. METHODS Stably transfected CHIP overexpression and depletion DLD-1 and HT-29 cells were established using Lipofectamine 2000. Cell growth was monitored by x-Celligence system. Cell proliferation was detected using CCK-8 and Brdu proliferation assay. Cell apoptosis and cell cycle were detected by flow cytometry analysis. Cell migration and invasion abilities were monitored by x-Celligence system, wound healing assay and transwell assay. In vivo intraperitoneal metastasis assay was performed to investigate the influence of CHIP on the tumor metastasis of CRC cells in nude mice. The expression of ERK, AKT, NF-кB signaling subunits and EMT related proteins were detected by Western blotting. The influence and function of CHIP on the protein expression of CRC cells were also elucidated by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. CRC microarray tissue was analyzed to investigate the CHIP expression and its clinical significance. RESULTS CHIP depletion inhibited cell growth, migration and invasion potential of CRC cells, accompanied by downregulation of MAPK and AKT signaling activities and upregulation of E-cadherin. CHIP overexpression dramatically enhanced the migration and invasion abilities, due to the upregulation of MAPK and AKT signaling and downregulation of E-cadherin. The proteomic analysis confirmed that E-cadherin was decreased in CHIP-overexpressing CRC cells. Furthermore, clinical tissue data revealed that CHIP expression was upregulated in CRC samples and was significantly correlated with poor survival of CRC patients. Mechanically, CHIP probably activated the MAPK and AKT signaling, which inactivated GSK-3β. The GSK-3β inactivation, in turn, upregulated Slug and led to E-cadherin downregulation and EMT initiation. CONCLUSIONS Our finding suggested that CHIP functions as an oncogene in the migration and metastasis of CRC, and is a potential unfavorable independent predictive biomarker for CRC. CHIP activates the AKT pathway to promote EMT and metastasis in CRC through the CHIP-MAPK/AKT-GSK-3β-Slug-E-cadherin pathways.
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Affiliation(s)
- Jingjing Xu
- Center for Clinical Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Jun Zhou
- Center for Clinical Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Hanjue Dai
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Fei Liu
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Wenjing Li
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, 215006 China
| | - Wenjuan Wang
- State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, 250012 China
- Center for Gene and Immunotherapy, The Second Hospital of Shandong University, Jinan, 250012 China
| | - Feng Guo
- Department of Oncology, Nanjing Medical University Affiliated Suzhou Hospital, Baita West Road 16, Suzhou, 215001 China
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12
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Porpora M, Sauchella S, Rinaldi L, Delle Donne R, Sepe M, Torres-Quesada O, Intartaglia D, Garbi C, Insabato L, Santoriello M, Bachmann VA, Synofzik M, Lindner HH, Conte I, Stefan E, Feliciello A. Counterregulation of cAMP-directed kinase activities controls ciliogenesis. Nat Commun 2018; 9:1224. [PMID: 29581457 PMCID: PMC5964327 DOI: 10.1038/s41467-018-03643-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 02/28/2018] [Indexed: 01/13/2023] Open
Abstract
The primary cilium emanates from the cell surface of growth-arrested cells and plays a central role in vertebrate development and tissue homeostasis. The mechanisms that control ciliogenesis have been extensively explored. However, the intersection between GPCR signaling and the ubiquitin pathway in the control of cilium stability are unknown. Here we observe that cAMP elevation promotes cilia resorption. At centriolar satellites, we identify a multimeric complex nucleated by PCM1 that includes two kinases, NEK10 and PKA, and the E3 ubiquitin ligase CHIP. We show that NEK10 is essential for ciliogenesis in mammals and for the development of medaka fish. PKA phosphorylation primes NEK10 for CHIP-mediated ubiquitination and proteolysis resulting in cilia resorption. Disarrangement of this control mechanism occurs in proliferative and genetic disorders. These findings unveil a pericentriolar kinase signalosome that efficiently links the cAMP cascade with the ubiquitin-proteasome system, thereby controlling essential aspects of ciliogenesis.
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Affiliation(s)
- Monia Porpora
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy
| | - Simona Sauchella
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy
| | - Laura Rinaldi
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy
| | - Rossella Delle Donne
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy
| | - Maria Sepe
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy
| | - Omar Torres-Quesada
- Institute of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Daniela Intartaglia
- Telethon Institute of Genetics and Medicine, Pozzuoli (Naples), 80078, Italy
| | - Corrado Garbi
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy
| | - Luigi Insabato
- Department of Advanced Biomedical Sciences, University Federico II, Naples, 80131, Italy
| | - Margherita Santoriello
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy
| | - Verena A Bachmann
- Institute of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Matthis Synofzik
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen and German Center for Neurodegenerative Diseases (DZNE), 72076, Tübingen, Germany
| | - Herbert H Lindner
- Division of Clinical Biochemistry, Biocenter Medical University of Innsbruck, Innrain 80-82, A-6020, Innsbruck, Austria
| | - Ivan Conte
- Telethon Institute of Genetics and Medicine, Pozzuoli (Naples), 80078, Italy
| | - Eduard Stefan
- Institute of Biochemistry and Center for Molecular Biosciences Innsbruck, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Antonio Feliciello
- Department of Molecular Medicine and Medical Biotechnologies, University 'Federico II', Naples, 80131, Italy.
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13
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Yoo L, Yoon AR, Yun CO, Chung KC. Covalent ISG15 conjugation to CHIP promotes its ubiquitin E3 ligase activity and inhibits lung cancer cell growth in response to type I interferon. Cell Death Dis 2018; 9:97. [PMID: 29367604 PMCID: PMC5833375 DOI: 10.1038/s41419-017-0138-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 11/10/2017] [Accepted: 11/10/2017] [Indexed: 12/20/2022]
Abstract
The carboxyl terminus of Hsp70-interacting protein (CHIP) acts as a ubiquitin E3 ligase and a link between the chaperones Hsp70/90 and the proteasome system, playing a vital role in maintaining protein homeostasis. CHIP regulates a number of proteins involved in a myriad of physiological and pathological processes, but the underlying mechanism of action via posttranslational modification has not been extensively explored. In this study, we investigated a novel modulatory mode of CHIP and its effect on CHIP enzymatic activity. ISG15, an ubiquitin-like modifier, is induced by type I interferon (IFN) stimulation and can be conjugated to target proteins (ISGylation). Here we demonstrated that CHIP may be a novel target of ISGylation in HEK293 cells stimulated with type I IFN. We also found that Lys143/144/145 and Lys287 residues in CHIP are important for and target residues of ISGylation. Moreover, ISGylation promotes the E3 ubiquitin ligase activity of CHIP, subsequently causing a decrease in levels of oncogenic c-Myc, one of its many ubiquitination targets, in A549 lung cancer cells and inhibiting A549 cell and tumor growth. In conclusion, the present study demonstrates that covalent ISG15 conjugation produces a novel CHIP regulatory mode that enhances the tumor-suppressive activity of CHIP, thereby contributing to the antitumor effect of type I IFN.
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Affiliation(s)
- Lang Yoo
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - A-Rum Yoon
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, 04763, Korea
| | - Chae-Ok Yun
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, 04763, Korea
| | - Kwang Chul Chung
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea.
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14
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Cao Z, Li G, Shao Q, Yang G, Zheng L, Zhang T, Zhao Y. CHIP: A new modulator of human malignant disorders. Oncotarget 2018; 7:29864-74. [PMID: 27007160 PMCID: PMC5045438 DOI: 10.18632/oncotarget.8219] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 02/05/2016] [Indexed: 11/25/2022] Open
Abstract
Carboxyl terminus of Hsc70-interacting protein (CHIP) is known as a chaperone-associated E3 for a variety of protein substrates. It acts as a link between molecular chaperones and ubiquitin-proteasome system. Involved in the process of protein clearance, CHIP plays a critical role in maintaining protein homeostasis in diverse conditions. Here, we provide a comprehensive review of our current understanding of CHIP and summarize recent advances in CHIP biology, with a focus on CHIP in the setting of malignancies.
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Affiliation(s)
- Zhe Cao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Guanqiao Li
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Qianqian Shao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Gang Yang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Lianfang Zheng
- Department of Nuclear Medicine, Peking Union Medical Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Taiping Zhang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yupei Zhao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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15
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Bhuripanyo K, Wang Y, Liu X, Zhou L, Liu R, Duong D, Zhao B, Bi Y, Zhou H, Chen G, Seyfried NT, Chazin WJ, Kiyokawa H, Yin J. Identifying the substrate proteins of U-box E3s E4B and CHIP by orthogonal ubiquitin transfer. SCIENCE ADVANCES 2018; 4:e1701393. [PMID: 29326975 PMCID: PMC5756662 DOI: 10.1126/sciadv.1701393] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 12/01/2017] [Indexed: 06/07/2023]
Abstract
E3 ubiquitin (UB) ligases E4B and carboxyl terminus of Hsc70-interacting protein (CHIP) use a common U-box motif to transfer UB from E1 and E2 enzymes to their substrate proteins and regulate diverse cellular processes. To profile their ubiquitination targets in the cell, we used phage display to engineer E2-E4B and E2-CHIP pairs that were free of cross-reactivity with the native UB transfer cascades. We then used the engineered E2-E3 pairs to construct "orthogonal UB transfer (OUT)" cascades so that a mutant UB (xUB) could be exclusively used by the engineered E4B or CHIP to label their substrate proteins. Purification of xUB-conjugated proteins followed by proteomics analysis enabled the identification of hundreds of potential substrates of E4B and CHIP in human embryonic kidney 293 cells. Kinase MAPK3 (mitogen-activated protein kinase 3), methyltransferase PRMT1 (protein arginine N-methyltransferase 1), and phosphatase PPP3CA (protein phosphatase 3 catalytic subunit alpha) were identified as the shared substrates of the two E3s. Phosphatase PGAM5 (phosphoglycerate mutase 5) and deubiquitinase OTUB1 (ovarian tumor domain containing ubiquitin aldehyde binding protein 1) were confirmed as E4B substrates, and β-catenin and CDK4 (cyclin-dependent kinase 4) were confirmed as CHIP substrates. On the basis of the CHIP-CDK4 circuit identified by OUT, we revealed that CHIP signals CDK4 degradation in response to endoplasmic reticulum stress.
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Affiliation(s)
- Karan Bhuripanyo
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
- Department of Chemistry, University of Chicago, Chicago, IL 60637, USA
| | - Yiyang Wang
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Xianpeng Liu
- Department of Pharmacology, Northwestern University, Chicago, IL 60611, USA
| | - Li Zhou
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Ruochuan Liu
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Duc Duong
- Integrated Proteomics Core, Emory University, Atlanta, GA 30322, USA
| | - Bo Zhao
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yingtao Bi
- AbbVie Bioresearch Center, Worcester, MA 01605, USA
| | - Han Zhou
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Geng Chen
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Nicholas T. Seyfried
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Walter J. Chazin
- Departments of Biochemistry and Chemistry, Center for Structural Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Hiroaki Kiyokawa
- Department of Pharmacology, Northwestern University, Chicago, IL 60611, USA
| | - Jun Yin
- Department of Chemistry, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
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16
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Yoo L, Chung KC. The ubiquitin E3 ligase CHIP promotes proteasomal degradation of the serine/threonine protein kinase PINK1 during staurosporine-induced cell death. J Biol Chem 2017; 293:1286-1297. [PMID: 29242192 DOI: 10.1074/jbc.m117.803890] [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: 06/23/2017] [Revised: 11/10/2017] [Indexed: 11/06/2022] Open
Abstract
Mutations in the gene for the serine/threonine protein kinase PTEN-induced putative kinase 1 (PINK1) are the second most frequent cause of autosomal recessive Parkinson's disease (PD). Via its kinase activity, PINK1 regulates neuronal cell survival and mitochondrial quality control. Numerous reports have revealed that PINK1 has diverse and physiologically significant functions, and therefore its activity should be tightly regulated. However, the molecular mechanisms regulating PINK1 stability and the modulator(s) involved have not been elucidated. In this study, we demonstrate that the ubiquitin E3 ligase carboxyl terminus of Hsp70-interacting protein (CHIP) promotes PINK1 ubiquitination and decreases its steady-state levels. Moreover, PINK1 levels were strongly reduced in HEK293 and SH-SY5Y cells exposed to the apoptosis-inducer staurosporine. Of note, we found that this reduction resulted from CHIP-mediated PINK1 ubiquitination. Accordingly, siRNA-mediated CHIP knockdown reduced susceptibility to staurosporine-induced cell death. Taken together, these findings suggest that CHIP plays a role in negative regulation of PINK1 stability and may suppress PINK1's cytoprotective effect during staurosporine-induced mammalian cell death. We propose that this PINK1 regulatory pathway might contribute to Parkinson's disease pathogenesis.
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Affiliation(s)
- Lang Yoo
- From the Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Kwang Chul Chung
- From the Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
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17
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Shang Y, He J, Wang Y, Feng Q, Zhang Y, Guo J, Li J, Li S, Wang Y, Yan G, Ren F, Shi Y, Xu J, Zeps N, Zhai Y, He D, Chang Z. CHIP/Stub1 regulates the Warburg effect by promoting degradation of PKM2 in ovarian carcinoma. Oncogene 2017; 36:4191-4200. [PMID: 28346425 DOI: 10.1038/onc.2017.31] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 12/25/2016] [Accepted: 01/11/2017] [Indexed: 12/18/2022]
Abstract
Tumor cells preferentially adopt aerobic glycolysis for their energy supply, a phenomenon known as the Warburg effect. It remains a matter of debate as to how the Warburg effect is regulated during tumor progression. Here, we show that CHIP (carboxyl terminus of Hsc70-interacting protein), a U-box E3 ligase, suppresses tumor progression in ovarian carcinomas by inhibiting aerobic glycolysis. While CHIP is downregulated in ovarian carcinoma, induced expression of CHIP results in significant inhibition of the tumor growth examined by in vitro and in vivo experiments. Reciprocally, depletion of CHIP leads to promotion of tumor growth. By a SiLAD proteomics analysis, we identified pyruvate kinase isoenzyme M2 (PKM2), a critical regulator of glycolysis in tumors, as a target that CHIP mediated for degradation. Accordingly, we show that CHIP regulates PKM2 protein stability and thereafter the energy metabolic processes. Depletion or knockout of CHIP increased the glycolytic products in both tumor and mouse embryonic fibroblast cells. Simultaneously, we observed that CHIP expression inversely correlated with PKM2 levels in human ovarian carcinomas. This study reveals a mechanism that the Warburg effect is regulated by CHIP through its function as an E3 ligase, which mediates the degradation of PKM2 during tumor progression. Our findings shed new light into understanding of ovarian carcinomas and may provide a new therapeutic strategy for ovarian cancer.
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Affiliation(s)
- Y Shang
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, Department of Cell Biology, College of Life Sciences, Beijing Normal University, Beijing, China
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - J He
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, Department of Cell Biology, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Y Wang
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Q Feng
- Department of Gynecology and Obstetrics, The Third Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - Y Zhang
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - J Guo
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - J Li
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - S Li
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Y Wang
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - G Yan
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, Department of Cell Biology, College of Life Sciences, Beijing Normal University, Beijing, China
| | - F Ren
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Y Shi
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - J Xu
- School of Pathology and Laboratory Medicine, The University of Western Australia (M504), Crawley, WA, Australia
| | - N Zeps
- School of Surgery, The University of Western Australia (M509), Crawley, WA, Australia
- St John of God HealthCare, The Bendat Family Comprehensive Cancer Centre, Subiaco, WA, Australia
| | - Y Zhai
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, Department of Cell Biology, College of Life Sciences, Beijing Normal University, Beijing, China
| | - D He
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, Department of Cell Biology, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Z Chang
- State Key Laboratory of Membrane Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
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18
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Sarkar S, Brautigan DL, Larner JM. Aurora Kinase A Promotes AR Degradation via the E3 Ligase CHIP. Mol Cancer Res 2017; 15:1063-1072. [PMID: 28536143 DOI: 10.1158/1541-7786.mcr-17-0062] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 04/28/2017] [Accepted: 05/17/2017] [Indexed: 01/08/2023]
Abstract
Reducing the levels of the androgen receptor (AR) is one of the most viable approaches to combat castration-resistant prostate cancer. Previously, we observed that proteasomal-dependent degradation of AR in response to 2-methoxyestradiol (2-ME) depends primarily on the E3 ligase C-terminus of HSP70-interacting protein (STUB1/CHIP). Here, 2-ME stimulation activates CHIP by phosphorylation via Aurora kinase A (AURKA). Aurora A kinase inhibitors and RNAi knockdown of Aurora A transcript selectively blocked CHIP phosphorylation and AR degradation. Aurora A kinase is activated by 2-ME in the S-phase as well as during mitosis, and phosphorylates CHIP at S273. Prostate cancer cells expressing an S273A mutant of CHIP have attenuated AR degradation upon 2-ME treatment compared with cells expressing wild-type CHIP, supporting the idea that CHIP phosphorylation by Aurora A activates its E3 ligase activity for the AR. These results reveal a novel 2-ME→Aurora A→CHIP→AR pathway that promotes AR degradation via the proteasome that may offer novel therapeutic opportunities for prostate cancer. Mol Cancer Res; 15(8); 1063-72. ©2017 AACR.
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Affiliation(s)
- Sukumar Sarkar
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - David L Brautigan
- Center for Cell Signaling, Department of Microbiology, Immunology & Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - James M Larner
- Department of Radiation Oncology, University of Virginia School of Medicine, Charlottesville, Virginia.
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19
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Biswas K, Sarkar S, Du K, Brautigan DL, Abbas T, Larner JM. The E3 Ligase CHIP Mediates p21 Degradation to Maintain Radioresistance. Mol Cancer Res 2017; 15:651-659. [PMID: 28232384 DOI: 10.1158/1541-7786.mcr-16-0466] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/31/2017] [Accepted: 02/06/2017] [Indexed: 11/16/2022]
Abstract
Lung cancer resists radiotherapy, making it one of the deadliest forms of cancer. Here, we show that human lung cancer cell lines can be rendered sensitive to ionizing radiation (IR) by RNAi knockdown of C-terminus of Hsc70-interacting protein (CHIP/STUB1), a U-box-type E3 ubiquitin ligase that targets a number of stress-induced proteins. Mechanistically, ubiquitin-dependent degradation of the cyclin-dependent kinase (CDK) inhibitor, p21 protein, is reduced by CHIP knockdown, leading to enhanced senescence of cells in response to exposure to IR. Cellular senescence and sensitivity to IR is prevented by CRISPR/Cas9-mediated deletion of the p21 gene (CDKN1A) in CHIP knockdown cells. Conversely, overexpression of CHIP potentiates p21 degradation and promotes greater radioresistance of lung cancer cells. In vitro and cell-based assays demonstrate that p21 is a novel and direct ubiquitylation substrate of CHIP that also requires the CHIP-associated chaperone HSP70. These data reveal that the inhibition of the E3 ubiquitin ligase CHIP promotes radiosensitivity, thus suggesting a novel strategy for the treatment of lung cancer.Implications: The CHIP-HSP70-p21 ubiquitylation/degradation axis identified here could be exploited to enhance the efficacy of radiotherapy in patients with non-small cell lung cancer. Mol Cancer Res; 15(6); 651-9. ©2017 AACR.
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Affiliation(s)
- Kuntal Biswas
- Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia
| | - Sukumar Sarkar
- Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia
| | - Kangping Du
- Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia
| | - David L Brautigan
- Center for Cell Signaling and Department of Microbiology, Immunology & Cancer Biology, University of Virginia, Charlottesville, Virginia
| | - Tarek Abbas
- Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia.,Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, Virginia
| | - James M Larner
- Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia.
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PARP1 regulates the protein stability and proapoptotic function of HIPK2. Cell Death Dis 2016; 7:e2438. [PMID: 27787517 PMCID: PMC5134000 DOI: 10.1038/cddis.2016.345] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 09/23/2016] [Accepted: 09/23/2016] [Indexed: 12/30/2022]
Abstract
Homeodomain-interacting protein kinase 2 (HIPK2) is a nuclear serine/threonine kinase that functions in DNA damage response and development. In the present study, we propose that the protein stability and proapoptotic function of HIPK2 are regulated by poly(ADP-ribose) polymerase 1 (PARP1). We present evidence indicating that PARP1 promotes the proteasomal degradation of HIPK2. The tryptophan-glycine-arginine (WGR) domain of PARP1 was necessary and sufficient for the promotion of HIPK2 degradation independently of the PARP1 enzymatic activity. The WGR domain mediated the interaction between HIPK2 and C-terminus of HSP70-interacting protein (CHIP) via HSP70. We found that CHIP can function as a ubiquitin ligase for HIPK2. The interaction between PAPR1 and HIPK2 was weakened following DNA damage. Importantly, PARP1 reduced the HIPK2-mediated p53 phosphorylation, proapoptotic transcriptional activity and cell death. These results suggest that PARP1 can modulate the tumor-suppressing function of HIPK2 by regulating the protein stability of HIPK2.
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21
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Joshi V, Amanullah A, Upadhyay A, Mishra R, Kumar A, Mishra A. A Decade of Boon or Burden: What Has the CHIP Ever Done for Cellular Protein Quality Control Mechanism Implicated in Neurodegeneration and Aging? Front Mol Neurosci 2016; 9:93. [PMID: 27757073 PMCID: PMC5047891 DOI: 10.3389/fnmol.2016.00093] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 09/20/2016] [Indexed: 01/13/2023] Open
Abstract
Cells regularly synthesize new proteins to replace old and abnormal proteins for normal cellular functions. Two significant protein quality control pathways inside the cellular milieu are ubiquitin proteasome system (UPS) and autophagy. Autophagy is known for bulk clearance of cytoplasmic aggregated proteins, whereas the specificity of protein degradation by UPS comes from E3 ubiquitin ligases. Few E3 ubiquitin ligases, like C-terminus of Hsc70-interacting protein (CHIP) not only take part in protein quality control pathways, but also plays a key regulatory role in other cellular processes like signaling, development, DNA damage repair, immunity and aging. CHIP targets misfolded proteins for their degradation through proteasome, as well as autophagy; simultaneously, with the help of chaperones, it also regulates folding attempts for misfolded proteins. The broad range of CHIP substrates and their associations with multiple pathologies make it a key molecule to work upon and focus for future therapeutic interventions. E3 ubiquitin ligase CHIP interacts and degrades many protein inclusions formed in neurodegenerative diseases. The presence of CHIP at various nodes of cellular protein-protein interaction network presents this molecule as a potential candidate for further research. In this review, we have explored a wide range of functionality of CHIP inside cells by a detailed presentation of its co-chaperone, E3 and E4 enzyme like functions, with central focus on its protein quality control roles in neurodegenerative diseases. We have also raised many unexplored but expected fundamental questions regarding CHIP functions, which generate hopes for its future applications in research, as well as drug discovery.
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Affiliation(s)
- Vibhuti Joshi
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Ayeman Amanullah
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Arun Upadhyay
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Ribhav Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
| | - Amit Kumar
- Centre for Biosciences and Biomedical Engineering, Indian Institute of Technology Indore Madhya Pradesh, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur Rajasthan, India
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Shao M, Li L, Song S, Wu W, Peng P, Yang C, Zhang M, Duan F, Jia D, Zhang J, Wu H, Zhao R, Wang L, Ruan Y, Gu J. E3 ubiquitin ligase CHIP interacts with C-type lectin-like receptor CLEC-2 and promotes its ubiquitin-proteasome degradation. Cell Signal 2016; 28:1530-6. [PMID: 27443248 DOI: 10.1016/j.cellsig.2016.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 06/30/2016] [Accepted: 07/17/2016] [Indexed: 01/14/2023]
Abstract
C-type lectin-like receptor 2 (CLEC-2) was originally identified as a member of non-classical C-type lectin-like receptors in platelets and immune cells. Activation of CLEC-2 is involved in thrombus formation, lymphatic/blood vessel separation, platelet-mediated tumor metastasis and immune response. Nevertheless, the regulation of CLEC-2 expression is little understood. In this study, we identified that the C terminus of Hsc70-interacting protein (CHIP) interacted with CLEC-2 by mass spectrometry analysis, and CHIP decreased the protein expression of CLEC-2 through lysine-48-linked ubiquitination and proteasomal degradation. Deleted and point mutation also revealed that CHIP controlled CLEC-2 protein expression via both tetratricopeptide repeats (TPR) domain and Ubox domain in a HSP70/90-independent manner. Moreover, reduced CHIP expression was associated with decreased CLEC-2 polyubiquitination and increased CLEC-2 protein levels in PMA-induced differentiation of THP-1 monocytes into macrophages. These results indicate that CLEC-2 is the target substrate of E3 ubiquitin ligase CHIP, and suggest that the CHIP/CLEC-2 axis may play an important role in the modulation of immune response.
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Affiliation(s)
- Miaomiao Shao
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Lili Li
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Shushu Song
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Weicheng Wu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Peike Peng
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Caiting Yang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Mingming Zhang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Fangfang Duan
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Dongwei Jia
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Jie Zhang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Hao Wu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Ran Zhao
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Lan Wang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China.
| | - Yuanyuan Ruan
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China.
| | - Jianxin Gu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, PR China
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Zhao Z, Wang L, James T, Jung Y, Kim I, Tan R, Hoffmann FM, Xu W. Reciprocal Regulation of ERα and ERβ Stability and Activity by Diptoindonesin G. ACTA ACUST UNITED AC 2015; 22:1608-21. [PMID: 26670079 DOI: 10.1016/j.chembiol.2015.10.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 10/01/2015] [Accepted: 10/22/2015] [Indexed: 02/07/2023]
Abstract
ERβ is regarded as a "tumor suppressor" in breast cancer due to its anti-proliferative effects. However, unlike ERα, ERβ has not been developed as a therapeutic target in breast cancer due to loss of ERβ in aggressive cancers. In a small-molecule library screen for ERβ stabilizers, we identified Diptoindonesin G (Dip G), which significantly increases ERβ protein stability while decreasing ERα protein levels. Dip G enhances the transcription and anti-proliferative activities of ERβ, while attenuating the transcription and proliferative effects of ERα. Further investigation revealed that instead of targeting ER, Dip G targets the CHIP E3 ubiquitin ligase shared by ERα and ERβ. Thus, Dip G is a dual-functional moiety that reciprocally controls ERα and ERβ protein stability and activities via an indirect mechanism. The ERβ stabilization effects of Dip G may enable the development of ERβ-targeted therapies for human breast cancers.
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Affiliation(s)
- Zibo Zhao
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, WI 53705, USA
| | - Lu Wang
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, WI 53705, USA
| | - Taryn James
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, WI 53705, USA
| | - Youngeun Jung
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, Incheon 406-840, Republic of Korea
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, Incheon 406-840, Republic of Korea
| | - Renxiang Tan
- State Key Laboratory of Pharmaceutical Biotechnology, Institute of Functional Biomolecules, Nanjing University, Nanjing 210093, PR China
| | - F Michael Hoffmann
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, WI 53705, USA
| | - Wei Xu
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, WI 53705, USA.
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24
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Hu Z, Scott HS, Qin G, Zheng G, Chu X, Xie L, Adelson DL, Oftedal BE, Venugopal P, Babic M, Hahn CN, Zhang B, Wang X, Li N, Wei C. Revealing Missing Human Protein Isoforms Based on Ab Initio Prediction, RNA-seq and Proteomics. Sci Rep 2015; 5:10940. [PMID: 26156868 PMCID: PMC4496727 DOI: 10.1038/srep10940] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 05/05/2015] [Indexed: 01/02/2023] Open
Abstract
Biological and biomedical research relies on comprehensive understanding of protein-coding transcripts. However, the total number of human proteins is still unknown due to the prevalence of alternative splicing. In this paper, we detected 31,566 novel transcripts with coding potential by filtering our ab initio predictions with 50 RNA-seq datasets from diverse tissues/cell lines. PCR followed by MiSeq sequencing showed that at least 84.1% of these predicted novel splice sites could be validated. In contrast to known transcripts, the expression of these novel transcripts were highly tissue-specific. Based on these novel transcripts, at least 36 novel proteins were detected from shotgun proteomics data of 41 breast samples. We also showed L1 retrotransposons have a more significant impact on the origin of new transcripts/genes than previously thought. Furthermore, we found that alternative splicing is extraordinarily widespread for genes involved in specific biological functions like protein binding, nucleoside binding, neuron projection, membrane organization and cell adhesion. In the end, the total number of human transcripts with protein-coding potential was estimated to be at least 204,950.
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Affiliation(s)
- Zhiqiang Hu
- 1] School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China [2] Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai 201203, China
| | - Hamish S Scott
- 1] Department of Genetics and Molecular Pathology, Centre for Cancer Biology, Frome Road, Adelaide, SA 5000 Australia [2] School of Biological Sciences, University of Adelaide, SA 5005, Australia [3] School of Medicine, University of Adelaide, North Terrace, Adelaide, SA 5000, Australia [4] School of Pharmacy and Medical Sciences, Division of Health Sciences, University of South Australia, SA, Australia [5] ACRF Cancer Genomics Facility, Centre for Cancer Biology, SA Pathology, Frome Road, Adelaide, SA 5000, Australia
| | - Guangrong Qin
- Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai 201203, China
| | - Guangyong Zheng
- 1] Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai 201203, China [2] CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China
| | - Xixia Chu
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Lu Xie
- Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai 201203, China
| | - David L Adelson
- School of Biological Sciences, University of Adelaide, SA 5005, Australia
| | - Bergithe E Oftedal
- 1] Department of Genetics and Molecular Pathology, Centre for Cancer Biology, Frome Road, Adelaide, SA 5000 Australia [2] Department of Biomedical Informatics (DBMI), Vanderbilt University Medical Center (VUMC), 2525 West End Ave, Suite 800, Nashville, TN 37203, USA
| | - Parvathy Venugopal
- 1] Department of Genetics and Molecular Pathology, Centre for Cancer Biology, Frome Road, Adelaide, SA 5000 Australia [2] School of Biological Sciences, University of Adelaide, SA 5005, Australia
| | - Milena Babic
- Department of Genetics and Molecular Pathology, Centre for Cancer Biology, Frome Road, Adelaide, SA 5000 Australia
| | - Christopher N Hahn
- 1] Department of Genetics and Molecular Pathology, Centre for Cancer Biology, Frome Road, Adelaide, SA 5000 Australia [2] School of Biological Sciences, University of Adelaide, SA 5005, Australia [3] School of Medicine, University of Adelaide, North Terrace, Adelaide, SA 5000, Australia
| | - Bing Zhang
- Department of Biomedical Informatics (DBMI), Vanderbilt University Medical Center (VUMC), 2525 West End Ave, Suite 800, Nashville, TN 37203, USA
| | - Xiaojing Wang
- Department of Biomedical Informatics (DBMI), Vanderbilt University Medical Center (VUMC), 2525 West End Ave, Suite 800, Nashville, TN 37203, USA
| | - Nan Li
- Institute of Immunology, Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, China
| | - Chaochun Wei
- 1] School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China [2] Shanghai Center for Bioinformation Technology, 1278 Keyuan Road, Pudong District, Shanghai 201203, China
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25
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Sun C, Li HL, Chen HR, Shi ML, Liu QH, Pan ZQ, Bai J, Zheng JN. Decreased expression of CHIP leads to increased angiogenesis via VEGF-VEGFR2 pathway and poor prognosis in human renal cell carcinoma. Sci Rep 2015; 5:9774. [PMID: 26021863 PMCID: PMC4448523 DOI: 10.1038/srep09774] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Accepted: 01/22/2015] [Indexed: 02/08/2023] Open
Abstract
CHIP (c-terminal Hsp70-interacting protein) is an E3 ligase which may play different roles in different cancers. The elucidation of the VHL-HIF-1α (hypoxia inducible factor-1α)-VEGF (vascular endothelial growth factor) pathway has led to the development of targeted therapy in renal cell carcinoma (RCC). However, little is known about the role of CHIP and the relationship between CHIP and VEGF-VEGFR2 (VEGF receptor 2) pathway in RCC. In this study, we found that the expression of CHIP was downregulated and significantly correlated with pT status (P = 0.022) and TNM stage (P = 0.022) in 304 RCC and 35 normal renal tissues using tissue microarray. Moreover, low expression of CHIP is a strong and independent negative prognostic value for RCC. In vitro, CHIP negatively regulated RCC cell migration, invasion and angiogenesis. In addition, ELISA tests showed that restoration of CHIP inhibited, while knockdown promoted, the secreted level of VEGF. Furthermore, western blot indicated that the VEGFR2 protein level was reduced after CHIP overexpression. Our findings demonstrate for the first time that CHIP may be involved in RCC angiogenesis through regulating VEGF secretion and expression of VEGFR2. CHIP may serve as promising prognostic biomarker of angiogenesis and may constitute a potential therapeutic target in RCC.
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Affiliation(s)
- Chao Sun
- 1] The First Clinical Medical College, Nanjing Medical University, Nanjing, 210029, China [2] Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, 221002, China [3] Department of Urology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, 233000, China
| | - Hai-long Li
- 1] The First Clinical Medical College, Nanjing Medical University, Nanjing, 210029, China [2] Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, 221002, China
| | - Hai-rong Chen
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, 210029, China
| | - Mei-lin Shi
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, 221002, China
| | - Qing-hua Liu
- 1] Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, 221002, China [2] School of Pathology, Xuzhou Medical College, Xuzhou, 221002, China
| | - Zhen-qiang Pan
- 1] Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, 221002, China [2] Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, 10029, NY, USA
| | - Jin Bai
- 1] Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, 221002, China [2] Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, 10029, NY, USA
| | - Jun-nian Zheng
- 1] The First Clinical Medical College, Nanjing Medical University, Nanjing, 210029, China [2] Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, 221002, China [3] Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical College, Xuzhou, 221002, China
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26
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Liu F, Zhou J, Zhou P, Chen W, Guo F. The ubiquitin ligase CHIP inactivates NF-κB signaling and impairs the ability of migration and invasion in gastric cancer cells. Int J Oncol 2015; 46:2096-106. [PMID: 25672477 DOI: 10.3892/ijo.2015.2893] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 12/17/2014] [Indexed: 11/06/2022] Open
Abstract
Ubiquitin modification of proteins influences cellular processes related to carcinogenesis. The carboxyl terminus of Hsc-70-interacting protein (CHIP), as U-box-type ubiquitin ligase, induces ubiquitination and proteasome-mediated degradation of its substrate proteins. In this study, the role of CHIP in diverse aspects of gastric cancer cells was investigated. CHIP overexpression in the AGS gastric cancer cells caused impaired tumor growth. CHIP overexpression significantly inhibited the migration and invasion of the AGS cells. Moreover, we found that not only RelA/p65 but also RelB, the NF-κB subunits, was negatively regulated by CHIP, likely owing to the TRAF2 reduction. Downregulated target genes of NF-κB subunits, including MMP-2 and -9, integrin β-1 and Bcl-2 were involved in these processes. We also showed that the expression level of CHIP was frequently decreased in gastric cancer tissues and the low level of CHIP expression might be an indicator of an unfavorable prognosis. Taken together, these observations provide functional evidence for CHIP behaviors as a tumor suppressor in gastric cancer.
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Affiliation(s)
- Fei Liu
- Central Laboratory, The First Affiliated Hospital of Soochow University, Suzhou 215006, P.R. China
| | - Jun Zhou
- Central Laboratory, The First Affiliated Hospital of Soochow University, Suzhou 215006, P.R. China
| | - Peng Zhou
- Central Laboratory, The First Affiliated Hospital of Soochow University, Suzhou 215006, P.R. China
| | - Weichang Chen
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou 215006, P.R. China
| | - Feng Guo
- Central Laboratory, The First Affiliated Hospital of Soochow University, Suzhou 215006, P.R. China
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27
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Joshi AD, Catravas JD. Commentary: CHIPping away pancreatic tumors? ANNALS OF TRANSLATIONAL MEDICINE 2014; 2:105. [PMID: 25489579 DOI: 10.3978/j.issn.2305-5839.2014.11.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 10/10/2014] [Indexed: 11/14/2022]
Affiliation(s)
- Atul D Joshi
- Frank Reidy Research Center for Bioelectrics, Old Dominion University, Norfolk, VA 23508, USA
| | - John D Catravas
- Frank Reidy Research Center for Bioelectrics, Old Dominion University, Norfolk, VA 23508, USA
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28
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Dowling P, Pollard D, Larkin A, Henry M, Meleady P, Gately K, O'Byrne K, Barr MP, Lynch V, Ballot J, Crown J, Moriarty M, O'Brien E, Morgan R, Clynes M. Abnormal levels of heterogeneous nuclear ribonucleoprotein A2B1 (hnRNPA2B1) in tumour tissue and blood samples from patients diagnosed with lung cancer. MOLECULAR BIOSYSTEMS 2014; 11:743-52. [PMID: 25483567 DOI: 10.1039/c4mb00384e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Lung cancer is the second most common type of cancer in the world and is the most common cause of cancer-related death in both men and women. Research into causes, prevention and treatment of lung cancer is ongoing and much progress has been made recently in these areas, however survival rates have not significantly improved. Therefore, it is essential to develop biomarkers for early diagnosis of lung cancer, prediction of metastasis and evaluation of treatment efficiency, as well as using these molecules to provide some understanding about tumour biology and translate highly promising findings in basic science research to clinical application. In this investigation, two-dimensional difference gel electrophoresis and mass spectrometry were initially used to analyse conditioned media from a panel of lung cancer and normal bronchial epithelial cell lines. Significant proteins were identified with heterogeneous nuclear ribonucleoprotein A2B1 (hnRNPA2B1), pyruvate kinase M2 isoform (PKM2), Hsc-70 interacting protein and lactate dehydrogenase A (LDHA) selected for analysis in serum from healthy individuals and lung cancer patients. hnRNPA2B1, PKM2 and LDHA were found to be statistically significant in all comparisons. Tissue analysis and knockdown of hnRNPA2B1 using siRNA subsequently demonstrated both the overexpression and potential role for this molecule in lung tumorigenesis. The data presented highlights a number of in vitro derived candidate biomarkers subsequently verified in patient samples and also provides some insight into their roles in the complex intracellular mechanisms associated with tumour progression.
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Affiliation(s)
- Paul Dowling
- National Institute for Cellular Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
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29
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Shang Y, Zhao X, Tian B, Wang Y, Ren F, Jia B, Zhai Y, Chen W, He D, Chang Z. CHIP/Stub1 interacts with eIF5A and mediates its degradation. Cell Signal 2014; 26:1098-104. [PMID: 24509416 DOI: 10.1016/j.cellsig.2014.01.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 01/09/2014] [Accepted: 01/26/2014] [Indexed: 12/12/2022]
Abstract
eIF5A, containing the unusual amino acid hypusine, is a highly conserved protein essential for the proliferation of eukaryotic cells. Previous studies have demonstrated that the activity of eIF5A was regulated through modification of hypusine, phosphorylation and acetylation. However, no study was documented for regulation of the protein stability. Here, we report that eIF5A is a target of CHIP (the carboxyl terminus of Hsc70-interacting protein, also named Stub1), an E3 ligase with a U-box domain, through a proteomics analysis. CHIP directly interacted with eIF5A, preferably through the U-box domain, to mediate eIF5A ubiquitination and degradation. Simultaneously, we investigated that CHIP expression inversely correlated with eIF5A levels in colorectal cancers, consistent with the fact that the protein level of eIF5A was increased in the CHIP knock-out MEF cells. Taken together, we propose that CHIP regulates the eIF5A protein stability via a protein degradation mechanism. This study provides a new insight into understanding the regulation of the eIF5A stability.
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Affiliation(s)
- Yu Shang
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, College of Life Sciences, Beijing Normal University, Beijing 100875, China; State Key Laboratory of Biomembrane and Membrane Biotechnology, School of Medicine, Tsinghua University, Beijing 100084, China.
| | - Xinghui Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology, School of Medicine, Tsinghua University, Beijing 100084, China; State Key Laboratory of Pathogens and Biosecurity, Laboratory of Applied Molecular Biology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Bo Tian
- Department of Surgical Oncology, Affiliated Hospital of Shaanxi University of Chinese Medicine, Shaanxi, Xianyang 712083, China
| | - Yinyin Wang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, School of Medicine, Tsinghua University, Beijing 100084, China
| | - Fangli Ren
- State Key Laboratory of Biomembrane and Membrane Biotechnology, School of Medicine, Tsinghua University, Beijing 100084, China
| | - Baoqing Jia
- Department of General Surgery, Chinese PLA General Hospital, Beijing 100853, China
| | - Yonggong Zhai
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, College of Life Sciences, Beijing Normal University, Beijing 100875, China
| | - Wei Chen
- State Key Laboratory of Pathogens and Biosecurity, Laboratory of Applied Molecular Biology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Dacheng He
- The Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, College of Life Sciences, Beijing Normal University, Beijing 100875, China
| | - Zhijie Chang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, School of Medicine, Tsinghua University, Beijing 100084, China.
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