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Nie Z, Zhai F, Zhang H, Zheng H, Pei J. The multiple roles of viral 3D pol protein in picornavirus infections. Virulence 2024; 15:2333562. [PMID: 38622757 PMCID: PMC11020597 DOI: 10.1080/21505594.2024.2333562] [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: 12/18/2023] [Accepted: 03/17/2024] [Indexed: 04/17/2024] Open
Abstract
The Picornaviridae are a large group of positive-sense, single-stranded RNA viruses, and most research has focused on the Enterovirus genus, given they present a severe health risk to humans. Other picornaviruses, such as foot-and-mouth disease virus (FMDV) and senecavirus A (SVA), affect agricultural production with high animal mortality to cause huge economic losses. The 3Dpol protein of picornaviruses is widely known to be used for genome replication; however, a growing number of studies have demonstrated its non-polymerase roles, including modulation of host cell biological processes, viral replication complex assembly and localization, autophagy, and innate immune responses. Currently, there is no effective vaccine to control picornavirus diseases widely, and clinical therapeutic strategies have limited efficiency in combating infections. Many efforts have been made to develop different types of drugs to prohibit virus survival; the most important target for drug development is the virus polymerase, a necessary element for virus replication. For picornaviruses, there are also active efforts in targeted 3Dpol drug development. This paper reviews the interaction of 3Dpol proteins with the host and the progress of drug development targeting 3Dpol.
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Affiliation(s)
- Zhenyu Nie
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou, China
| | - Fengge Zhai
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou, China
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Han Zhang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou, China
| | - Haixue Zheng
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou, China
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Jingjing Pei
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
- Gansu Province Research Center for Basic Disciplines of Pathogen Biology, Lanzhou, China
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2
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Mohapatra D, Panda S, Mohanty N, Panda S, Lewkowicz N, Lapinska B. Comparison of Immunohistochemical Markers in Oral Submucous Fibrosis and Oral Submucous Fibrosis Transformed to Oral Squamous Cell Carcinoma-A Systematic Review and Meta-Analysis. Int J Mol Sci 2023; 24:11771. [PMID: 37511530 PMCID: PMC10380386 DOI: 10.3390/ijms241411771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/18/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
The objective of the study was to compare the expression of immunohistochemical (IHC) markers of oral submucous fibrosis (OSMF) (non-transformed group) to those of oral squamous cell carcinoma (OSCC) transformed from OSMF (transformed group). The search for comparative cross-sectional studies was carried out in PubMed and Scopus abiding to the PICO criteria, where expression of IHC markers in OSMF were compared with that of OSCC transformed from OSMF. The cellular distribution, number of positive cases, staining intensity, and mean immunoreactive score (IRS) of each IHC marker were evaluated in both groups. A total of 14 studies were included in the systematic review, in which immunoexpression of 15 epithelial and 4 connective tissue biomarkers were evaluated. Expression of β1-integrin, OCT-3, CD1a, CD207, survivin, Dickkopf-1, COX-2, hTERT, CTGF, MDM2, Ki-67, and α-SMA were increased during transformation of OSMF to OSCC. Conversely, expression of PTEN and lysyl oxidase decreased during transformation of OSMF to OSCC. Expression of a group of epithelial markers, such as COX2, hTERT, CTGF, survivin, MDM2, and p53, was 38 times lower in the non-transformed group cases compared to transformed group cases (95% CI: 58% to 10%; p = 0.01; and I2 = 90%). Meta-analysis of all markers involved in cell metabolism/apoptosis, which included β1-integrin along with the above markers also suggested 42 times lower expression in the non-transformed group as compared to the transformed group (95% CI: 58% to 10%; p = 0.01; and I2 = 90%). Sub-group analyses on cytoplasmic and nuclear epithelial markers were inconclusive. Meta-analysis of connective tissue markers was also inconclusive. No publication bias was found. Instead of delving into numerous markers without a strong basis for their use, it is advisable to further study the markers identified in this study to explore their clinical utility.
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Affiliation(s)
- Diksha Mohapatra
- Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha 'O' Anusandhan University, Bhubaneswar 751003, Odisha, India
| | - Swagatika Panda
- Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha 'O' Anusandhan University, Bhubaneswar 751003, Odisha, India
| | - Neeta Mohanty
- Department of Oral Pathology and Microbiology, Institute of Dental Sciences, Siksha 'O' Anusandhan University, Bhubaneswar 751003, Odisha, India
| | - Saurav Panda
- Department of Periodontics and Oral Implantology, Institute of Dental Sciences, Siksha 'O' Anusandhan University, Bhubaneswar 751003, Odisha, India
| | - Natalia Lewkowicz
- Department of Periodontology and Oral Diseases, Medical University of Lodz, 251 Pomorska St., 92-213 Lodz, Poland
| | - Barbara Lapinska
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska St., 92-213 Lodz, Poland
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3
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Shift in G1-Checkpoint from ATM-Alone to a Cooperative ATM Plus ATR Regulation with Increasing Dose of Radiation. Cells 2021; 11:cells11010063. [PMID: 35011623 PMCID: PMC8750242 DOI: 10.3390/cells11010063] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/23/2021] [Accepted: 12/24/2021] [Indexed: 12/13/2022] Open
Abstract
The current view of the involvement of PI3-kinases in checkpoint responses after DNA damage is that ATM is the key regulator of G1-, S- or G2-phase checkpoints, that ATR is only partly involved in the regulation of S- and G2-phase checkpoints and that DNA-PKcs is not involved in checkpoint regulation. However, further analysis of the contributions of these kinases to checkpoint responses in cells exposed to ionizing radiation (IR) recently uncovered striking integrations and interplays among ATM, ATR and DNA-PKcs that adapt not only to the phase of the cell cycle in which cells are irradiated, but also to the load of DNA double-strand breaks (DSBs), presumably to optimize their processing. Specifically, we found that low IR doses in G2-phase cells activate a G2-checkpoint that is regulated by epistatically coupled ATM and ATR. Thus, inhibition of either kinase suppresses almost fully its activation. At high IR doses, the epistatic ATM/ATR coupling relaxes, yielding to a cooperative regulation. Thus, single-kinase inhibition suppresses partly, and only combined inhibition suppresses fully G2-checkpoint activation. Interestingly, DNA-PKcs integrates with ATM/ATR in G2-checkpoint control, but functions in its recovery in a dose-independent manner. Strikingly, irradiation during S-phase activates, independently of dose, an exclusively ATR-dependent G2 checkpoint. Here, ATM couples with DNA-PKcs to regulate checkpoint recovery. In the present work, we extend these studies and investigate organization and functions of these PI3-kinases in the activation of the G1 checkpoint in cells irradiated either in the G0 or G1 phase. We report that ATM is the sole regulator of the G1 checkpoint after exposure to low IR doses. At high IR doses, ATM remains dominant, but contributions from ATR also become detectable and are associated with limited ATM/ATR-dependent end resection at DSBs. Under these conditions, only combined ATM + ATR inhibition fully abrogates checkpoint and resection. Contributions of DNA-PKcs and CHK2 to the regulation of the G1 checkpoint are not obvious in these experiments and may be masked by the endpoint employed for checkpoint analysis and perturbations in normal progression through the cell cycle of cells exposed to DNA-PKcs inhibitors. The results broaden our understanding of organization throughout the cell cycle and adaptation with increasing IR dose of the ATM/ATR/DNA-PKcs module to regulate checkpoint responses. They emphasize notable similarities and distinct differences between G1-, G2- and S-phase checkpoint regulation that may guide DSB processing decisions.
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Dai X, Zhang T, Hua D. Ubiquitination and SUMOylation: protein homeostasis control over cancer. Epigenomics 2021; 14:43-58. [PMID: 34875856 DOI: 10.2217/epi-2021-0371] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Ubiquitination and SUMOylation are two essential components of the ubiquitination proteasome system playing fundamental roles in protein homeostasis maintenance and signal transduction, perturbation of which is associated with tumorigenesis. By comparing the mechanisms of ubiquitination and SUMOylation, assessing their crosstalk, reviewing their differential associations with cancer and identifying unaddressed yet important questions that may lead the field trend, this review sheds light on the similarities and differences of ubiquitination and SUMOylation toward the improved harnessing of both post-translational modification machineries, as well as forecasts novel onco-therapeutic opportunities through cell homeostasis control.
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Affiliation(s)
- Xiaofeng Dai
- Wuxi School of Medicine, Jiangnan University, Wuxi, 214122,China
| | - Tongxin Zhang
- Wuxi School of Medicine, Jiangnan University, Wuxi, 214122,China
| | - Dong Hua
- Wuxi School of Medicine, Jiangnan University, Wuxi, 214122,China.,Wuxi People's Hospital, Wuxi, 214023, China.,Affiliated Hospital of Jiangnan University, Wuxi, 214122, China
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5
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Ghazi N, Khorasanchi M. Markers associated with malignant transformation of oral lichen planus: A review article. Arch Oral Biol 2021; 127:105158. [PMID: 34022545 DOI: 10.1016/j.archoralbio.2021.105158] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 11/29/2022]
Abstract
Oral lichen planus (OLP) is one of the autoimmune diseases associated with chronic inflammation that involves several complications including the potential for malignant transformation into oral squamous cell carcinoma. Pathogenesis of OLP are yet to be fully comprehended however, it has been demonstrated that the epithelial cells in OLP lesions are affected by cytotoxic T lymphocytes leading to immunological reactions. Various factors are reported to act as diagnostic markers for predicting and monitoring the cancerous progression. Hence, in this review, we summarize and present the latest studies regarding the predictive markers associated with malignant potential of OLP.
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Affiliation(s)
- Narges Ghazi
- Department of Oral and Maxillofacial Pathology, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Maryam Khorasanchi
- Student Research Committee, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
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Yu F, Zhang W, Yan C, Yan D, Zhou M, Chen J, Zhao X, Zhu A, Zhou J, Liu H, Sun H, Fu Y. PAX6, modified by SUMOylation, plays a protective role in corneal endothelial injury. Cell Death Dis 2020; 11:683. [PMID: 32826860 PMCID: PMC7442823 DOI: 10.1038/s41419-020-02848-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/30/2020] [Accepted: 07/30/2020] [Indexed: 11/21/2022]
Abstract
Treating corneal endothelial diseases tends to be challenging as human corneal endothelial cells (CECs) do not proliferate in vivo. The pathogenesis or mechanisms underlying injured CECs need further studies. The abnormal expression of PAX6, which is an essential transcription factor for corneal homeostasis, exhibits corneal endothelial defects. However, the effects of PAX6 protein involved in corneal endothelial wound process are still unknown. Here, we found the upregulated protein levels of PAX6 in human corneal endothelial monolayer after injury; the expression of PAX6 also increased in murine and rat corneal endothelium injury models. Enforced PAX6 expression could alleviate the damages to CECs via regulating permeability by prompting cellular tight junction. In addition, SUMOylation mainly happened on both K53 and K89 residues of 48-kD PAX6 (the longest and main isoform expressed in cornea), and de-SUMOylation promoted the stability of PAX6 protein in vitro. In CECs of SENP1+/− mice, increased SUMOylation levels leading to instability and low expression of PAX6, delayed the repair of CECs after injury. Furthermore, overexpression of PAX6 accelerated the rate of corneal endothelial repair of SENP1+/− mice. Our findings indicate that SENP1-mediated de-SUMOylation improving the stability of PAX6, amplifies the protective effects of PAX6 on corneal endothelial injuries, highlighting potentials of PAX6 and/or SUMOylation to be used as a treatment target for corneal endothelial disorders.
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Affiliation(s)
- Fei Yu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China
| | - Weijie Zhang
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China
| | - Chenxi Yan
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China
| | - Dan Yan
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China
| | - Meng Zhou
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China
| | - Junzhao Chen
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China
| | - Xiangteng Zhao
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Aoxue Zhu
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Jie Zhou
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Huiqing Liu
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.,Department of Pediatric Neurosurgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Hao Sun
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China. .,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China.
| | - Yao Fu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China. .,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China.
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Li W, Peng X, Lang J, Xu C. Targeting Mouse Double Minute 2: Current Concepts in DNA Damage Repair and Therapeutic Approaches in Cancer. Front Pharmacol 2020; 11:631. [PMID: 32477121 PMCID: PMC7232544 DOI: 10.3389/fphar.2020.00631] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/21/2020] [Indexed: 01/14/2023] Open
Abstract
Defects in DNA damage repair may cause genome instability and cancer development. The tumor suppressor gene p53 regulates cell cycle arrest to allow time for DNA repair. The oncoprotein mouse double minute 2 (MDM2) promotes cell survival, proliferation, invasion, and therapeutic resistance in many types of cancer. The major role of MDM2 is to inhibit p53 activity and promote its degradation. In this review, we describe the influence of MDM2 on genomic instability, the role of MDM2 on releasing p53 and binding DNA repair proteins to inhibit repair, and the regulation network of MDM2 including its transcriptional modifications, protein stability, and localization following DNA damage in genome integrity maintenance and in MDM2-p53 axis control. We also discuss p53-dependent and p53 independent oncogenic function of MDM2 and the outcomes of clinical trials that have been used with clinical inhibitors targeting p53-MDM2 to treat certain cancers.
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Affiliation(s)
- Wen Li
- Cancer Clinical Research Center & Integrative Cancer Center, Sichuan Cancer Hospital & Institute Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Xinhao Peng
- Cancer Clinical Research Center & Integrative Cancer Center, Sichuan Cancer Hospital & Institute Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China.,Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Cancer Hospital & Institute Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Jinyi Lang
- Cancer Clinical Research Center & Integrative Cancer Center, Sichuan Cancer Hospital & Institute Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China.,Radiation Oncology Key Laboratory of Sichuan Province, Sichuan Cancer Hospital & Institute Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Chuan Xu
- Cancer Clinical Research Center & Integrative Cancer Center, Sichuan Cancer Hospital & Institute Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
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Kaur J, Daoud A, Eblen ST. Targeting Chromatin Remodeling for Cancer Therapy. Curr Mol Pharmacol 2020; 12:215-229. [PMID: 30767757 PMCID: PMC6875867 DOI: 10.2174/1874467212666190215112915] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/25/2019] [Accepted: 01/31/2019] [Indexed: 12/31/2022]
Abstract
Background: Epigenetic alterations comprise key regulatory events that dynamically alter gene expression and their deregulation is commonly linked to the pathogenesis of various diseases, including cancer. Unlike DNA mutations, epigenetic alterations involve modifications to proteins and nucleic acids that regulate chromatin structure without affecting the underlying DNA sequence, altering the accessibility of the transcriptional machinery to the DNA, thus modulating gene expression. In cancer cells, this often involves the silencing of tumor suppressor genes or the increased expression of genes involved in oncogenesis. Advances in laboratory medicine have made it possible to map critical epigenetic events, including histone modifications and DNA methylation, on a genome-wide scale. Like the identification of genetic mutations, mapping of changes to the epigenetic landscape has increased our understanding of cancer progression. However, in contrast to irreversible genetic mutations, epigenetic modifications are flexible and dynamic, thereby making them promising therapeutic targets. Ongoing studies are evaluating the use of epigenetic drugs in chemotherapy sensitization and immune system modulation. With the preclinical success of drugs that modify epigenetics, along with the FDA approval of epigenetic drugs including the DNA methyltransferase 1 (DNMT1) inhibitor 5-azacitidine and the histone deacetylase (HDAC) inhibitor vorinostat, there has been a rise in the number of drugs that target epigenetic modulators over recent years. Conclusion: We provide an overview of epigenetic modulations, particularly those involved in cancer, and discuss the recent advances in drug development that target these chromatin-modifying events, primarily focusing on novel strategies to regulate the epigenome.
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Affiliation(s)
- Jasmine Kaur
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Abdelkader Daoud
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina, United States
| | - Scott T Eblen
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina, United States
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9
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Wong SW, Yeh SJ, Li CW, Wang LHC, Chen BS. Investigation mechanisms between normal, developing and regenerating livers for regenerative liver drug design. Regen Med 2019; 14:359-387. [PMID: 31204905 DOI: 10.2217/rme-2018-0058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: A systematic multimolecule drug design procedure is proposed for promoting hepatogenesis and liver regeneration. Materials & methods: Genome-wide microarray data including three hepatic conditions are obtained from the GEO database (GSE15238). System modeling and big data mining methods are used to construct real genome-wide genetic-and-epigenetic networks (GWGENs). Then, we extracted the core GWGENs by applying principal network projection on real GWGENs of normal, developing and regenerating livers, respectively. After that, we investigated the significant signal pathways and epigenetic modifications in the core GWGENs to identify potential biomarkers as drug targets. Result & conclusion: A multimolecule drug consisting of sulmazole, clofibrate, colchicine, furazolidone, nadolol, eticlopride and felbinac is proposed to target on novel biomarkers for promoting hepatogenesis and liver regeneration.
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Affiliation(s)
- Shang-Wen Wong
- Lab of Automatic Control, Signal Processing, and Systems Biology, Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shan-Ju Yeh
- Lab of Automatic Control, Signal Processing, and Systems Biology, Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Cheng-Wei Li
- Lab of Automatic Control, Signal Processing, and Systems Biology, Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Lily Hui-Ching Wang
- Department of Life Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Bor-Sen Chen
- Lab of Automatic Control, Signal Processing, and Systems Biology, Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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Bentz GL, Lowrey AJ, Horne DC, Nguyen V, Satterfield AR, Ross TD, Harrod AE, Uchakina ON, McKallip RJ. Using glycyrrhizic acid to target sumoylation processes during Epstein-Barr virus latency. PLoS One 2019; 14:e0217578. [PMID: 31125383 PMCID: PMC6534330 DOI: 10.1371/journal.pone.0217578] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 05/14/2019] [Indexed: 12/24/2022] Open
Abstract
Cellular sumoylation processes are proposed targets for anti-viral and anti-cancer therapies. We reported that Epstein-Barr virus (EBV) latent membrane protein 1 (LMP1) dysregulates cellular sumoylation processes, contributing to its oncogenic potential in EBV-associated malignancies. Ginkgolic acid and anacardic acid, known inhibitors of sumoylation, inhibit LMP1-induced protein sumoylation; however, both drugs have adverse effects in hosts. Here we test the effects of glycyrrhizic acid, a medicinal botanical extract with anti-inflammatory, anti-carcinogenic, and anti-viral properties, on cellular sumoylation processes. While glycyrrhizic acid is known to inhibit EBV penetration, its affect on cellular sumoylation processes remains to be documented. We hypothesized that glycyrrhizic acid inhibits cellular sumoylation processes and may be a viable treatment for Epstein-Barr virus-associated malignancies. Results showed that glycyrrhizic acid inhibited sumoylation processes (without affecting ubiquitination processes), limited cell growth, and induced apoptosis in multiple cell lines. Similar to ginkgolic acid; glycyrrhizic acid targeted the first step of the sumoylation process and resulted in low levels of spontaneous EBV reactivation. Glycyrrhizic acid did not affect induced reactivation of the virus, but the presence of the extract did reduce the ability of the produced virus to infect additional cells. Therefore, we propose that glycyrrhizic acid may be a potential therapeutic drug to augment the treatment of EBV-associated lymphoid malignancies.
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Affiliation(s)
- Gretchen L. Bentz
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
- * E-mail:
| | - Angela J. Lowrey
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Dustin C. Horne
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Vy Nguyen
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Austin R. Satterfield
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Tabithia D. Ross
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Abigail E. Harrod
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Olga N. Uchakina
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Robert J. McKallip
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
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11
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Salahuddin S, Fath EK, Biel N, Ray A, Moss CR, Patel A, Patel S, Hilding L, Varn M, Ross T, Cramblet WT, Lowrey A, Pagano JS, Shackelford J, Bentz GL. Epstein-Barr Virus Latent Membrane Protein-1 Induces the Expression of SUMO-1 and SUMO-2/3 in LMP1-positive Lymphomas and Cells. Sci Rep 2019; 9:208. [PMID: 30659232 PMCID: PMC6338769 DOI: 10.1038/s41598-018-36312-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 11/12/2018] [Indexed: 11/17/2022] Open
Abstract
Epstein-Barr Virus latent membrane protein-1 (LMP1) interacts with the SUMO-conjugating enzyme Ubc9, which induces protein sumoylation and may contribute to LMP1-mediated oncogenesis. After analyzing human lymphoma tissues and EBV-positive cell lines, we now document a strong correlation between LMP1 and sumo-1/2/3 or SUMO-1/2/3 levels, and show that LMP1-induced sumo expression requires the activation of NF-κB signaling through CTAR1 and CTAR2. Together, these results point to a second mechanism by which LMP1 dysregulates sumoylation processes and adds EBV-associated lymphomas to the list of malignancies associated with increased SUMO expression.
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Affiliation(s)
- Sadia Salahuddin
- Departments of Medicine and Microbiology and Immunology, The University of North Carolina, Chapel Hill, NC, USA.,Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC, USA.,Atta-ur-Rehman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Emma K Fath
- Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC, USA
| | - Natalie Biel
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Ashley Ray
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - C Randall Moss
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Akash Patel
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Sheetal Patel
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Leslie Hilding
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Matthew Varn
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Tabithia Ross
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Wyatt T Cramblet
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Angela Lowrey
- Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Joseph S Pagano
- Departments of Medicine and Microbiology and Immunology, The University of North Carolina, Chapel Hill, NC, USA.,Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC, USA
| | - Julia Shackelford
- Department of Cellular Biology and Physiology, The University of North Carolina, Chapel Hill, NC, USA.,Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC, USA
| | - Gretchen L Bentz
- Lineberger Comprehensive Cancer Center, The University of North Carolina, Chapel Hill, NC, USA. .,Department of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USA.
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12
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Ubiquitination and SUMOylation in the chronic inflammatory tumor microenvironment. Biochim Biophys Acta Rev Cancer 2018; 1870:165-175. [DOI: 10.1016/j.bbcan.2018.08.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 08/10/2018] [Accepted: 08/15/2018] [Indexed: 12/28/2022]
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13
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El Motiam A, Vidal S, De La Cruz-Herrera CF, Da Silva-Álvarez S, Baz-Martínez M, Seoane R, Vidal A, Rodríguez MS, Xirodimas DP, Carvalho AS, Beck HC, Matthiesen R, Collado M, Rivas C. Interplay between SUMOylation and NEDDylation regulates RPL11 localization and function. FASEB J 2018; 33:643-651. [DOI: 10.1096/fj.201800341rr] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ahmed El Motiam
- Centro de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS)Universidade de Santiago de Compostela e Instituto de Investigaciones Sanitarias Santiago de Compostela Spain
| | - Santiago Vidal
- Centro de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS)Universidade de Santiago de Compostela e Instituto de Investigaciones Sanitarias Santiago de Compostela Spain
| | - Carlos F. De La Cruz-Herrera
- Departamento de Biología Molecular y CelularCentro Nacional de Biotecnología–Consejo Superior de Investigaciones Científicas (CNB-CSIC) Madrid Spain
- Department of Molecular GeneticsUniversity of Toronto Toronto Ontario Canada
| | - Sabela Da Silva-Álvarez
- Instituto de Investigatión Sanitaria de Santiago de CompostelaComplexo Hospitalario Universitario de Santiago de CompostelaServicio Gallego de Salud Santiago de Compostela Spain
| | - Maite Baz-Martínez
- Centro de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS)Universidade de Santiago de Compostela e Instituto de Investigaciones Sanitarias Santiago de Compostela Spain
| | - Rocío Seoane
- Centro de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS)Universidade de Santiago de Compostela e Instituto de Investigaciones Sanitarias Santiago de Compostela Spain
| | - Anxo Vidal
- Centro de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS)Universidade de Santiago de Compostela e Instituto de Investigaciones Sanitarias Santiago de Compostela Spain
| | - Manuel S. Rodríguez
- Advanced Technology Institute in Life Sciences (ITAV)Centre National de la Recherche Scientifique (CNRS)–USR 3505 Toulouse France
- Institut de Pharmacologie et de Biologie StructuraleUniversity of Toulouse III–Paul Sabatier Toulouse France
| | - Dimitris P. Xirodimas
- Montpellier Cell Biology Research Center (CRBM)CNRS–UMR 5237 Université de Montpellier Montpellier France
| | - Ana Sofia Carvalho
- Centro de Estudos de Doenças Crónicas (CEDOC)Universidade Nova de Lisboa (NOVA) Medical School/Faculdade de Ciências MédicasUniversidade Nova de Lisboa Lisboa Portugal
| | | | - Rune Matthiesen
- Centro de Estudos de Doenças Crónicas (CEDOC)Universidade Nova de Lisboa (NOVA) Medical School/Faculdade de Ciências MédicasUniversidade Nova de Lisboa Lisboa Portugal
| | - Manuel Collado
- Instituto de Investigatión Sanitaria de Santiago de CompostelaComplexo Hospitalario Universitario de Santiago de CompostelaServicio Gallego de Salud Santiago de Compostela Spain
| | - Carmen Rivas
- Centro de Investigación en Medicina Molecular y Enfermedades Crónicas (CIMUS)Universidade de Santiago de Compostela e Instituto de Investigaciones Sanitarias Santiago de Compostela Spain
- Departamento de Biología Molecular y CelularCentro Nacional de Biotecnología–Consejo Superior de Investigaciones Científicas (CNB-CSIC) Madrid Spain
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14
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Markers of Oral Lichen Planus Malignant Transformation. DISEASE MARKERS 2018; 2018:1959506. [PMID: 29682099 PMCID: PMC5846459 DOI: 10.1155/2018/1959506] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 01/15/2018] [Indexed: 12/17/2022]
Abstract
Oral lichen planus (OLP) is a chronic inflammatory disease of unknown etiology with significant impact on patients' quality of life. Malignant transformation into oral squamous cell carcinoma (OSCC) is considered as one of the most serious complications of the disease; nevertheless, controversy still persists. Various factors seem to be involved in the progression of malignant transformation; however, the mechanism of this process is not fully understood yet. Molecular alterations detected in OLP samples might represent useful biomarkers for predicting and monitoring the malignant progression. In this review, we discuss various studies which highlight different molecules as ominous predictors of OLP malignant transformation.
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15
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Ranieri M, Vivo M, De Simone M, Guerrini L, Pollice A, La Mantia G, Calabrò V. Sumoylation and ubiquitylation crosstalk in the control of ΔNp63α protein stability. Gene 2017; 645:34-40. [PMID: 29246538 DOI: 10.1016/j.gene.2017.12.018] [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: 06/30/2017] [Revised: 12/05/2017] [Accepted: 12/11/2017] [Indexed: 12/20/2022]
Abstract
ΔNp63α is finely and strictly regulated during embryogenesis and differentiation. ΔNp63α is the only p63 isoform degraded by the proteasome after Ubiquitin and SUMO (Small Ubiquitin-like MOdifier) conjugation. Here, we show that p63 ubiquitylation per se is not the signal triggering p63 proteasomal degradation. Taking advantage of natural ΔNp63α mutants isolated by patients with Split Hand and Foot Malformation IV syndrome, we found that SUMO and Ub modifications are not redundant and both are required to guarantee efficient ΔNp63α degradation. Here, we present evidence that sumoylation and ubiquitylation of ΔNp63α are strongly intertwined, and none of the two can efficiently occur if the other is impaired.
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Affiliation(s)
- Michela Ranieri
- Department of Developmental and Molecular Biology Albert Einstein College of Medicine, United States
| | - Maria Vivo
- Dipartimento di Biologia, Università degli Studi di Napoli "Federico II", Italy.
| | | | | | - Alessandra Pollice
- Dipartimento di Biologia, Università degli Studi di Napoli "Federico II", Italy
| | - Girolama La Mantia
- Dipartimento di Biologia, Università degli Studi di Napoli "Federico II", Italy
| | - Viola Calabrò
- Dipartimento di Biologia, Università degli Studi di Napoli "Federico II", Italy
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16
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Kim JY, Song JT, Seo HS. Post-translational modifications of Arabidopsis E3 SUMO ligase AtSIZ1 are controlled by environmental conditions. FEBS Open Bio 2017; 7:1622-1634. [PMID: 28979848 PMCID: PMC5623694 DOI: 10.1002/2211-5463.12309] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Revised: 08/27/2017] [Accepted: 08/29/2017] [Indexed: 01/04/2023] Open
Abstract
Sumoylation regulates numerous cellular functions in plants as well as in other eukaryotic systems. However, the regulatory mechanisms controlling E3 small ubiquitin‐related modifier (SUMO) ligase are not well understood. Here, post‐translational modification of the Arabidopsis E3 SUMO ligase AtSIZ1 was shown to be specifically controlled by abiotic stresses. AtSIZ1 ubiquitination was induced by exposure to heat stress in transgenic plants overexpressing the E3 ubiquitin ligase COP1. In addition, AtSIZ1 ubiquitination was strongly enhanced in transgenic plants overexpressing SUMO isopeptidase ESD4 under heat stress. By contrast, drought stress induced sumoylation rather than ubiquitination of AtSIZ1 and sumoylated forms of AtSIZ1 accumulated in esd4 and cop1–4 mutants. Moreover, siz1 mutants were found to be tolerant to heat and drought stresses. Taken together, these results indicate that ubiquitination and sumoylation of AtSIZ1 in response to abiotic stresses depend on the activities of COP1 and ESD4 and that the activity and stability of AtSIZ1 can be specifically controlled by different abiotic stresses.
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Affiliation(s)
- Joo Yong Kim
- Department of Plant ScienceResearch Institute for Agriculture and Life Sciences, and Plant Genomics and Breeding InstituteSeoul National UniversityKorea
| | - Jong Tae Song
- School of Applied BiosciencesKyungpook National UniversityDaeguKorea
| | - Hak Soo Seo
- Department of Plant ScienceResearch Institute for Agriculture and Life Sciences, and Plant Genomics and Breeding InstituteSeoul National UniversityKorea.,Bio-MAX InstituteSeoul National UniversityKorea
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17
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Lee JS, Choi HJ, Baek SH. Sumoylation and Its Contribution to Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 963:283-298. [PMID: 28197919 DOI: 10.1007/978-3-319-50044-7_17] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Post-translational modifications play an important role in regulating protein activity by altering their functions. Sumoylation is a highly dynamic process which is tightly regulated by a fine balance between conjugating and deconjugating enzyme activities. It affects intracellular localization and their interaction with their binding partners, thereby changing gene expression. Consequently, these changes in turn affect signaling mechanisms that regulate many cellular functions, such as cell growth, proliferation, apoptosis , DNA repair , and cell survival. It is becoming apparent that deregulation in the SUMO pathway contributes to oncogenic transformation by affecting sumoylation/desumoylation of many oncoproteins and tumor suppressors. Loss of balance between sumoylation and desumoylation has been reported in a number of studies in a variety of disease types including cancer. This chapter summarizes the mechanisms and functions of the deregulated SUMO pathway affecting oncogenes and tumor suppressor genes.
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Affiliation(s)
- Jason S Lee
- Department of Biological Sciences, Seoul National University, Seoul, 151-742, South Korea
| | - Hee June Choi
- Department of Biological Sciences, Seoul National University, Seoul, 151-742, South Korea
| | - Sung Hee Baek
- Department of Biological Sciences, Seoul National University, Seoul, 151-742, South Korea.
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18
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Hochrainer K. Protein Modifications with Ubiquitin as Response to Cerebral Ischemia-Reperfusion Injury. Transl Stroke Res 2017; 9:157-173. [DOI: 10.1007/s12975-017-0567-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/11/2017] [Accepted: 08/17/2017] [Indexed: 12/12/2022]
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19
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Lee CM, Tripathi S, Morgan ET. Nitric oxide-regulated proteolysis of human CYP2B6 via the ubiquitin-proteasome system. Free Radic Biol Med 2017; 108:478-486. [PMID: 28427998 PMCID: PMC5507215 DOI: 10.1016/j.freeradbiomed.2017.04.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/07/2017] [Accepted: 04/13/2017] [Indexed: 12/31/2022]
Abstract
We showed previously that rat cytochrome P450 CYP2B1 undergoes NO-dependent proteasomal degradation in response to inflammatory stimuli, and that the related human enzyme CYP2B6 is also down-regulated by NO in primary human hepatocytes. To investigate the mechanism of CYP2B6 down-regulation, we made several cell lines (HeLa and HuH7 cells) in which native CYP2B6 or CYP2B6 with a C-terminal V5 tag (CYP2B6V5) are expressed from a lentiviral vector with a cytomegalovirus promoter. Native CYP2B6 protein was rapidly down-regulated in HeLa cells within 3h of treatment with the NO donor (Z)-1-[2-(2-Aminoethyl)-N-(2-ammonioethyl)amino]diazen-1-ium-1,2-diolate, while its mRNA level was not down-regulated. Treatment of the cells with the NO donor (Z)-1-[N-(3-aminopropyl)-N-(3-ammoniopropyl)amino]diazen-1-ium-1,2-diolate also resulted in rapid down-regulation of CYP2B6 activity, measured as the formation of 7-hydroxy-4-trifluoromethylcoumarin, as well as 2B6 protein in the CYP2B6 HeLa cell line. CYP2B6V5 was also down-regulated by NO donors in HuH7 cells. Down-regulation was observed in the presence of cycloheximide, demonstrating that this occurs via a post-translational mechanism. We generated a HeLa cell line expressing both CYP2B6V5 and human nitric oxide synthase 2 (NOS2), the latter under positive control by tetracycline. The cellular NO produced by doxycycline treatment also effectively down-regulated CYP2B6 protein, which was blocked by the co-treatment with the NOS2 competitive inhibitor L-NG-nitroarginine methyl ester (L-NAME). We next investigated the proteolytic enzymes responsible for NO-dependent CYP2B6 degradation. Neither calpain inhibitors (N-Acetyl-L-leucyl-L-leucyl-L-norleucinal, carbobenzoxy-valinyl-phenylalaninal), nor lysosomal protease inhibitors (3-methyladenine and chloroquine) inhibited the NO dependent CYP2B6V5 down-regulation. The proteasome inhibitors MG132 and bortezomib attenuated, but did not completely block the NO-induced down-regulation in the HuH7 cell line. However, when cells were co-treated with NO donor and proteasome inhibitors, high molecular mass species could be detected on native CYP2B6 as well as CYP2B6V5 Western blots. Further investigation demonstrated that CYP2B6 protein was polyubiquitinated and this was dramatically enhanced by co-treatment with NO donor and bortezomib. Taken together, our data demonstrate that CYP2B6 is down-regulated in an NO-dependent manner via ubiquitination and proteasomal degradation.
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Affiliation(s)
- Choon-Myung Lee
- Department of Pharmacology, Emory University School of Medicine, Atlanta, GA 30322, USA.
| | - Shweta Tripathi
- Department of Pharmacology, Emory University School of Medicine, Atlanta, GA 30322, USA.
| | - Edward T Morgan
- Department of Pharmacology, Emory University School of Medicine, Atlanta, GA 30322, USA.
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SUMO-Modified FADD Recruits Cytosolic Drp1 and Caspase-10 to Mitochondria for Regulated Necrosis. Mol Cell Biol 2017; 37:MCB.00254-16. [PMID: 27799292 DOI: 10.1128/mcb.00254-16] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 10/20/2016] [Indexed: 01/02/2023] Open
Abstract
Fas-associated protein with death domain (FADD) plays a key role in extrinsic apoptosis. Here, we show that FADD is SUMOylated as an essential step during intrinsic necrosis. FADD was modified at multiple lysine residues (K120/125/149) by small ubiquitin-related modifier 2 (SUMO2) during necrosis caused by calcium ionophore A23187 and by ischemic damage. SUMOylated FADD bound to dynamin-related protein 1 (Drp1) in cells both in vitro and in ischemic tissue damage cores, thus promoting Drp1 recruitment by mitochondrial fission factor (Mff) to accomplish mitochondrial fragmentation. Mitochondrial-fragmentation-associated necrosis was blocked by FADD or Drp1 deficiency and SUMO-defective FADD expression. Interestingly, caspase-10, but not caspase-8, formed a ternary protein complex with SUMO-FADD/Drp1 on the mitochondria upon exposure to A23187 and potentiated Drp1 oligomerization for necrosis. Moreover, the caspase-10 L285F and A414V mutants, found in autoimmune lymphoproliferative syndrome and non-Hodgkin lymphoma, respectively, regulated this necrosis. Our study reveals an essential role of SUMOylated FADD in Drp1- and caspase-10-dependent necrosis, providing insights into the mechanism of regulated necrosis by calcium overload and ischemic injury.
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21
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Methionine adenosyltransferase α2 sumoylation positively regulate Bcl-2 expression in human colon and liver cancer cells. Oncotarget 2016; 6:37706-23. [PMID: 26416353 PMCID: PMC4741959 DOI: 10.18632/oncotarget.5342] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 09/15/2015] [Indexed: 12/15/2022] Open
Abstract
Ubiquitin-conjugating enzyme 9 (Ubc9) is required for sumoylation and inhibits apoptosis via Bcl-2 by unknown mechanism. Methionine adenosyltransferase 2A (MAT2A) encodes for MATα2, the catalytic subunit of the MATII isoenzyme that synthesizes S-adenosylmethionine (SAMe). Ubc9, Bcl-2 and MAT2A expression are up-regulated in several malignancies. Exogenous SAMe decreases Ubc9 and MAT2A expression and is pro-apoptotic in liver and colon cancer cells. Here we investigated whether there is interplay between Ubc9, MAT2A and Bcl-2. We used human colon and liver cancer cell lines RKO and HepG2, respectively, and confirmed key finding in colon cancer specimens. We found MATα2 can regulate Bcl-2 expression at multiple levels. MATα2 binds to Bcl-2 promoter to activate its transcription. This effect is independent of SAMe as MATα2 catalytic mutant was also effective. MATα2 also directly interacts with Bcl-2 to enhance its protein stability. MATα2's effect on Bcl-2 requires Ubc9 as MATα2's stability is influenced by sumoylation at K340, K372 and K394. Overexpressing wild type (but not less stable MATα2 sumoylation mutants) protected from 5-fluorouracil-induced apoptosis in both colon and liver cancer cells. Colon cancer have higher levels of sumoylated MATα2, total MATα2, Ubc9 and Bcl-2 and higher MATα2 binding to the Bcl-2 P2 promoter. Taken together, Ubc9's protective effect on apoptosis may be mediated at least in part by sumoylating and stabilizing MATα2 protein, which in turn positively maintains Bcl-2 expression. These interactions feed forward to further enhance growth and survival of the cancer cell.
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22
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Moussa RS, Kovacevic Z, Richardson DR. Differential targeting of the cyclin-dependent kinase inhibitor, p21CIP1/WAF1, by chelators with anti-proliferative activity in a range of tumor cell-types. Oncotarget 2016; 6:29694-711. [PMID: 26335183 PMCID: PMC4745756 DOI: 10.18632/oncotarget.5088] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Accepted: 08/10/2015] [Indexed: 11/25/2022] Open
Abstract
Chelators such as 2-hydroxy-1-napthylaldehyde isonicotinoyl hydrazone (311) and di-2-pyridylketone-4,4-dimethyl-3-thiosemicarbazone (Dp44mT) target tumor cell iron pools and inhibit proliferation. These agents also modulate multiple targets, one of which is the cyclin-dependent kinase inhibitor, p21. Hence, this investigation examined the mechanism of action of these compounds in targeting p21. All the chelators up-regulated p21 mRNA in the five tumor cell-types assessed. In contrast, examining their effect on total p21 protein levels, these agents induced either: (1) down-regulation in MCF-7 cells; (2) up-regulation in SK-MEL-28 and CFPAC-1 cells; or (3) had no effect in LNCaP and SK-N-MC cells. The nuclear localization of p21 was also differentially affected by the ligands depending upon the cell-type, with it being decreased in MCF-7 cells, but increased in SK-MEL-28 and CFPAC-1 cells. Further studies assessing the mechanisms responsible for these effects demonstrated that p21 expression was not correlated with p53 status, suggesting a p53-independent mechanism. Considering this, we examined proteins that modulate p21 independently of p53, namely NDRG1, MDM2 and ΔNp63. These studies demonstrated that a dominant negative MDM2 isoform (p75(MDM2)) closely resembled p21 expression in response to chelation in three cell lines. These data suggest MDM2 may be involved in the regulation of p21 by chelators.
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Affiliation(s)
- Rayan S Moussa
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Zaklina Kovacevic
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Des R Richardson
- Molecular Pharmacology and Pathology Program, Discipline of Pathology and Bosch Institute, The University of Sydney, Sydney, New South Wales, 2006, Australia
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23
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Vishwamitra D, Curry CV, Shi P, Alkan S, Amin HM. SUMOylation Confers Posttranslational Stability on NPM-ALK Oncogenic Protein. Neoplasia 2016; 17:742-754. [PMID: 26476082 PMCID: PMC4611074 DOI: 10.1016/j.neo.2015.09.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 09/07/2015] [Accepted: 09/15/2015] [Indexed: 01/09/2023] Open
Abstract
Nucleophosmin-anaplastic lymphoma kinase–expressing (NPM-ALK+) T-cell lymphoma is an aggressive form of cancer that commonly affects children and adolescents. The expression of NPM-ALK chimeric oncogene results from the chromosomal translocation t(2;5)(p23;q35) that causes the fusion of the ALK and NPM genes. This translocation generates the NPM-ALK protein tyrosine kinase that forms the constitutively activated NPM-ALK/NPM-ALK homodimers. In addition, NPM-ALK is structurally associated with wild-type NPM to form NPM/NPM-ALK heterodimers, which can translocate to the nucleus. The mechanisms that sustain the stability of NPM-ALK are not fully understood. SUMOylation is a posttranslational modification that is characterized by the reversible conjugation of small ubiquitin-like modifiers (SUMOs) with target proteins. SUMO competes with ubiquitin for substrate binding and therefore, SUMOylation is believed to protect target proteins from proteasomal degradation. Moreover, SUMOylation contributes to the subcellular distribution of target proteins. Herein, we found that the SUMOylation pathway is deregulated in NPM-ALK+ T-cell lymphoma cell lines and primary lymphoma tumors from patients. We also identified Lys24 and Lys32 within the NPM domain as the sites where NPM-ALK conjugates with SUMO-1 and SUMO-3. Importantly, antagonizing SUMOylation by the SENP1 protease decreased the accumulation of NPM-ALK and suppressed lymphoma cell viability, proliferation, and anchorage-independent colony formation. One possible mechanism for the SENP1-mediated decrease in NPM-ALK levels was the increase in NPM-ALK association with ubiquitin, which facilitates its degradation. Our findings propose a model in which aberrancies in SUMOylation contribute to the pathogenesis of NPM-ALK+ T-cell lymphoma. Unraveling such pathogenic mechanisms may lead to devising novel strategies to eliminate this aggressive neoplasm.
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Affiliation(s)
- Deeksha Vishwamitra
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX.
| | - Choladda V Curry
- Department of Pathology and Immunology, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Ping Shi
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Serhan Alkan
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Hesham M Amin
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas Graduate School of Biomedical Sciences, Houston, TX.
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p53-Dependent DNA damage response sensitive to editing-defective tRNA synthetase in zebrafish. Proc Natl Acad Sci U S A 2016; 113:8460-5. [PMID: 27402763 DOI: 10.1073/pnas.1608139113] [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] [Indexed: 12/31/2022] Open
Abstract
Brain and heart pathologies are caused by editing defects of transfer RNA (tRNA) synthetases, which preserve genetic code fidelity by removing incorrect amino acids misattached to tRNAs. To extend understanding of the broader impact of synthetase editing reactions on organismal homeostasis, and based on effects in bacteria ostensibly from small amounts of mistranslation of components of the replication apparatus, we investigated the sensitivity to editing of the vertebrate genome. We show here that in zebrafish embryos, transient overexpression of editing-defective valyl-tRNA synthetase (ValRS(ED)) activated DNA break-responsive H2AX and p53-responsive downstream proteins, such as cyclin-dependent kinase (CDK) inhibitor p21, which promotes cell-cycle arrest at DNA damage checkpoints, and Gadd45 and p53R2, with pivotal roles in DNA repair. In contrast, the response of these proteins to expression of ValRS(ED) was abolished in p53-deficient fish. The p53-activated downstream signaling events correlated with suppression of abnormal morphological changes caused by the editing defect and, in adults, reversed a shortened life span (followed for 2 y). Conversely, with normal editing activities, p53-deficient fish have a normal life span and few morphological changes. Whole-fish deep sequencing showed genomic mutations associated with the editing defect. We suggest that the sensitivity of p53 to expression of an editing-defective tRNA synthetase has a critical role in promoting genome integrity and organismal homeostasis.
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25
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Kim JY, Jang IC, Seo HS. COP1 Controls Abiotic Stress Responses by Modulating AtSIZ1 Function through Its E3 Ubiquitin Ligase Activity. FRONTIERS IN PLANT SCIENCE 2016; 7:1182. [PMID: 27536318 PMCID: PMC4971112 DOI: 10.3389/fpls.2016.01182] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 07/22/2016] [Indexed: 05/22/2023]
Abstract
Ubiquitination and sumoylation are essential post-translational modifications that regulate growth and development processes in plants, including control of hormone signaling mechanisms and responses to stress. This study showed that COP1 (Constitutive photomorphogenic 1) regulated the activity of Arabidopsis E3 SUMO (Small ubiquitin-related modifier) ligase AtSIZ1 through its E3 ubiquitin ligase activity. Yeast two hybrid analysis demonstrated that COP1 and AtSIZ1 directly interacted with one another, and subcellular localization assays indicated that COP1 and AtSIZ1 co-localized in nuclear bodies. Analysis of ubiquitination showed that AtSIZ1 was polyubiquitinated by COP1. The AtSIZ1 level was higher in cop1-4 mutants than in wild-type seedlings under light or dark conditions, and overexpression of a dominant-negative (DN)-COP1 mutant led to a substantial increase in AtSIZ1 accumulation. In addition, under drought, cold, and high salt conditions, SUMO-conjugate levels were elevated in DN-COP1-overexpressing plants and cop1-4 mutant plants compared to wild-type plants. Taken together, our results indicate that COP1 controls responses to abiotic stress by modulation of AtSIZ1 levels and activity.
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Affiliation(s)
- Joo Y. Kim
- Department of Plant Science, College of Agricultural Life Science, Seoul National University, SeoulSouth Korea
| | - In-Cheol Jang
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, SingaporeSingapore
| | - Hak S. Seo
- Department of Plant Science, College of Agricultural Life Science, Seoul National University, SeoulSouth Korea
- *Correspondence: Hak S. Seo,
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26
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Wu H, Chen X, Cheng J, Qi Y. SUMOylation and Potassium Channels: Links to Epilepsy and Sudden Death. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2015; 103:295-321. [PMID: 26920693 DOI: 10.1016/bs.apcsb.2015.11.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Neuronal potassium ion channels play an essential role in the generation of the action potential and excitability of neurons. The dysfunction of ion channel subunits can cause channelopathies, which are associated in some cases with sudden unexplained death in epilepsy SUDEP. The physiological roles of neuronal ion channels have been largely determined, but little is known about the molecular mechanisms underlying neurological channelopathies, especially the determinants of the channels' regulation. SUMO (small ubiquitin-like modifier) proteins covalently conjugate lysine residues in a large number of target proteins and modify their functions. SUMO modification (SUMOylation) has emerged as an important regulatory mechanism for protein stability, function, subcellular localization, and protein-protein interactions. Since SUMO was discovered almost 20 years ago, the biological contribution of SUMOylation has not fully understood. It is until recently that the physiological impacts of SUMOylation on the regulation of neuronal potassium ion channels have been investigated. It is well established that SUMOylation controls many aspects of nuclear function, but it is now clear that it is also a key determinant in the function of potassium channels, and SUMOylation has also been implicated in a wide range of channelopathies, including epilepsy and sudden death.
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Affiliation(s)
- Hongmei Wu
- College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, PR China
| | - Xu Chen
- College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, PR China
| | - Jinke Cheng
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China
| | - Yitao Qi
- College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, PR China.
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27
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Wang Y, Wang Y, Zhang H, Gao Y, Huang C, Zhou A, Zhou Y, Li Y. Sequential posttranslational modifications regulate PKC degradation. Mol Biol Cell 2015; 27:410-20. [PMID: 26564794 PMCID: PMC4713141 DOI: 10.1091/mbc.e15-09-0624] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 11/05/2015] [Indexed: 12/21/2022] Open
Abstract
PKC phosphorylation promotes its sumoylation, which in turn inhibits its ubiquitination and ultimately reduces its degradation via the ubiquitin-proteasome pathway. These findings provide a molecular explanation for the activation-induced down-regulation of PKC proteins. Cross-talk among different types of posttranslational modifications (PTMs) has emerged as an important regulatory mechanism for protein function. Here we elucidate a mechanism that controls PKCα stability via a sequential cascade of PTMs. We demonstrate that PKCα dephosphorylation decreases its sumoylation, which in turn promotes its ubiquitination and ultimately enhances its degradation via the ubiquitin-proteasome pathway. These findings provide a molecular explanation for the activation-induced down-regulation of PKC proteins.
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Affiliation(s)
- Yan Wang
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yangbo Wang
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Huijun Zhang
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yingwei Gao
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Chao Huang
- Center for Translational Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Aiwu Zhou
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yi Zhou
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32306
| | - Yong Li
- Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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28
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Li HY, Zhang LK, Zhu XJ, Shang J, Chen X, Zhu Y, Guo L. Analysis of EV71 infection progression using triple-SILAC-based proteomics approach. Proteomics 2015; 15:3629-43. [PMID: 26306425 DOI: 10.1002/pmic.201500180] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 07/29/2015] [Accepted: 08/19/2015] [Indexed: 11/09/2022]
Abstract
Enterovirus 71 (EV71), a member of Picornaviridae, causes severe neurological and systemic illness in children. To better understand the virus-host cell interactions, we performed a triple-SILAC-based quantitative proteomics study monitoring host cell proteome changes after EV71 infection. Based on the quantitative data for more than 4100 proteins, ∼17% of the proteins were found as significantly changed (p<0.01) at either 8 or 20 hours post infection. Five biological processes and seven protein classes showed significant differences. Functional screening of nine regulated proteins discovered the regulatory role of CHCH2, a mitochondrial protein known as a transcriptional activator for cytochrome c oxidase, in EV71 replication. Further studies showed that CHCH2 served as a negative regulator of innate immune responses. All MS data have been deposited in the ProteomeXchange with identifier PXD002483 (http://proteomecentral.proteomexchange.org/dataset/PXD002483).
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Affiliation(s)
- Hao-Yu Li
- State Key Laboratory of Virology, Wuhan University, Wuhan, P. R. China.,College of Life Sciences, Wuhan University, Wuhan, P. R. China
| | - Lei-Ke Zhang
- Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, P. R. China
| | - Xiu-Juan Zhu
- State Key Laboratory of Virology, Wuhan University, Wuhan, P. R. China.,College of Life Sciences, Wuhan University, Wuhan, P. R. China
| | - Jun Shang
- State Key Laboratory of Virology, Wuhan University, Wuhan, P. R. China.,College of Life Sciences, Wuhan University, Wuhan, P. R. China
| | - Xi Chen
- Wuhan Institute of Biotechnology, Wuhan, P. R. China
| | - Ying Zhu
- State Key Laboratory of Virology, Wuhan University, Wuhan, P. R. China.,College of Life Sciences, Wuhan University, Wuhan, P. R. China
| | - Lin Guo
- State Key Laboratory of Virology, Wuhan University, Wuhan, P. R. China.,College of Life Sciences, Wuhan University, Wuhan, P. R. China
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29
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Li J, Kurokawa M. Regulation of MDM2 Stability After DNA Damage. J Cell Physiol 2015; 230:2318-27. [PMID: 25808808 DOI: 10.1002/jcp.24994] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 03/20/2015] [Indexed: 12/13/2022]
Abstract
Cells in our body are constantly exposed to various stresses and threats to their genomic integrity. The tumor suppressor protein p53 plays a critical role in successful defense against these threats by inducing apoptotic cell death or cell cycle arrest. In unstressed conditions, p53 levels and activity must be kept low to prevent lethal activation of apoptotic and senescence pathways. However, upon DNA damage or other stressors, p53 is released from its inhibitory state to induce an array of apoptosis and cell cycle genes. Conversely, inactivation of p53 could promote unrestrained tumor proliferation and failure to appropriately undergo apoptotic cell death, which could, in turn, lead to carcinogenesis. The ubiquitin E3 ligase MDM2 is the most critical inhibitor of p53 that determines the cellular response to various p53-activating agents, including DNA damage. MDM2 activity is controlled by post-translational modifications, especially phosphorylation. However, accumulating evidence suggests that MDM2 is also regulated at the level of protein stability, which is controlled by the ubiquitin-proteasome pathway. Here, we discuss how MDM2 can be regulated in response to DNA damage with particular focus on the regulation of MDM2 protein stability.
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Affiliation(s)
- Jiaqi Li
- Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Manabu Kurokawa
- Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire.,Norris Cotton Cancer Center, Lebanon, New Hampshire
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30
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LMP1-Induced Sumoylation Influences the Maintenance of Epstein-Barr Virus Latency through KAP1. J Virol 2015; 89:7465-77. [PMID: 25948750 DOI: 10.1128/jvi.00711-15] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 05/01/2015] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED As a herpesvirus, Epstein-Barr virus (EBV) establishes a latent infection that can periodically undergo reactivation, resulting in lytic replication and the production of new infectious virus. Latent membrane protein-1 (LMP1), the principal viral oncoprotein, is a latency-associated protein implicated in regulating viral reactivation and the maintenance of latency. We recently found that LMP1 hijacks the SUMO-conjugating enzyme Ubc9 via its C-terminal activating region-3 (CTAR3) and induces the sumoylation of cellular proteins. Because protein sumoylation can promote transcriptional repression, we hypothesized that LMP1-induced protein sumoylation induces the repression of EBV lytic promoters and helps maintain the viral genome in its latent state. We now show that with inhibition of LMP1-induced protein sumoylation, the latent state becomes less stable or leakier in EBV-transformed lymphoblastoid cell lines. The cells are also more sensitive to viral reactivation induced by irradiation, which results in the increased production and release of infectious virus, as well as increased susceptibility to ganciclovir treatment. We have identified a target of LMP1-mediated sumoylation that contributes to the maintenance of latency in this context: KRAB-associated protein-1 (KAP1). LMP1 CTAR3-mediated sumoylation regulates the function of KAP1. KAP1 also binds to EBV OriLyt and immediate early promoters in a CTAR3-dependent manner, and inhibition of sumoylation processes abrogates the binding of KAP1 to these promoters. These data provide an additional line of evidence that supports our findings that CTAR3 is a distinct functioning regulatory region of LMP1 and confirm that LMP1-induced sumoylation may help stabilize the maintenance of EBV latency. IMPORTANCE Epstein-Barr virus (EBV) latent membrane protein-1 (LMP1) plays an important role in the maintenance of viral latency. Previously, we documented that LMP1 targets cellular proteins to be modified by a ubiquitin-like protein (SUMO). We have now identified a function for this LMP1-induced modification of cellular proteins in the maintenance of EBV latency. Because latently infected cells have to undergo viral reactivation in order to be vulnerable to antiviral drugs, these findings identify a new way to increase the rate of EBV reactivation, which increases cell susceptibility to antiviral therapies.
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31
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Yang F, Chen Y, Dai W. Sumoylation of Kif18A plays a role in regulating mitotic progression. BMC Cancer 2015; 15:197. [PMID: 25884224 PMCID: PMC4389313 DOI: 10.1186/s12885-015-1226-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 03/19/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Kif18A, the kinesin-8 motor protein, plays an essential role in regulating alignment of bi-oriented chromosomes at the midzone during mitosis. Kinesin proteins, including Kif18A, are often deregulated in many types of cancers and are thought to play a critical role in cancer progression. However, little is known about the post-translational modifications of Kif18A and their effects on its biological activity. METHODS Kif18A was identified to be a SUMO2 acceptor by using Ni-IDA resin to precipitate proteins from cells stably expressing His6-SUMO2. To identify the potential lysine residues, multi-site directed mutagenesis together with transient transfection and Ni-IDA pull-down assay were carried out. The confocal time-lapse imaging and immunofluorescent staining were used to study the roles of SUMO2 modification on Kif18A's activity during the cell cycle. RESULTS Kif18A is covalently modified by SUMO2 during the cell cycle, and its sumoylation peaks at metaphase and then rapidly decreases upon anaphase onset. Mutational analysis identifies multiple lysine residues (K148, K442, K533, K660 and K683) as potential SUMO acceptors. The functional studies reveal that sumoylation of Kif18A has little effect on protein stability and subcellular localization. However, compared with the wild-type control, ectopic expression of SUMO-resistant mutants of Kif18A results in a significant delay of mitotic exit. Confocal microscopy shows that cells expressing SUMO-resistant Kif18A display a compromised dissociation of BubR1 from kinetochores after anaphase onset. CONCLUSIONS Our studies reveal that sumoylation functions as an unidentified form of post-translational modification that regulates Kif18A activity during mitotic progression.
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Affiliation(s)
- Feikun Yang
- Department of Environmental Medicine, New York University Langone Medical Center, 57 Old Forge Road, Tuxedo Park, NY, 10987, USA.
| | - Yan Chen
- Center for Drug Discovery, Northeastern University, 360 Huntington Avenue, Boston, MA, 02115, USA.
| | - Wei Dai
- Department of Environmental Medicine, New York University Langone Medical Center, 57 Old Forge Road, Tuxedo Park, NY, 10987, USA. .,Department of Biochemistry and Molecular Pharmacology, New York University Langone Medical Center, 57 Old Forge Road, Tuxedo Park, NY, 10987, USA.
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32
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Zhang J, Yuan C, Wu J, Elsayed Z, Fu Z. Polo-like kinase 1-mediated phosphorylation of Forkhead box protein M1b antagonizes its SUMOylation and facilitates its mitotic function. J Biol Chem 2015; 290:3708-19. [PMID: 25533473 PMCID: PMC4319035 DOI: 10.1074/jbc.m114.634386] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Indexed: 12/25/2022] Open
Abstract
Transcription factor Forkhead box protein M1b (FoxM1b) plays an important role during mitotic entry and progression. Our previous studies identified polo-like kinase 1 (PLK1) as a major regulator of FoxM1b. During G2/M transition, PLK1 directly interacts with and phosphorylates FoxM1b, resulting in full activation of the transactivation capacity of FoxM1b. Such a vital regulatory mechanism is essential for timely mitotic entry and progression. However, the molecular mechanism by which PLK1-mediated phosphorylation enhances the transcriptional activity of FoxM1b remains to be determined. We demonstrate that FoxM1b can be SUMOylated in vitro and in vivo, preferentially by SUMO-1. SUMOylation of FoxM1b was found to occur at multiple sites, leading to suppression of FoxM1b transcriptional activity. Such a posttranslational modification of FoxM1b was antagonized by PLK1-mediated phosphorylation. By immunofluorescence staining and subcellular fractionation, we demonstrate that SUMO conjugation promotes cytosolic translocation of FoxM1b. Moreover, SUMO modification of FoxM1b facilitates the ubiquitin-mediated proteasomal degradation of FoxM1b. PLK1-mediated phosphorylation of FoxM1b abrogates the inhibitory effect on FoxM1b by SUMO modification, thereby promoting its nuclear translocation and preventing its proteolytic degradation in the cytoplasm. Such an antagonistic regulatory mechanism is essential for the mitotic function of FoxM1b, ensuring timely mitotic entry and progression. Taken together, our studies have revealed a working mechanism by which PLK1 positively regulates the activity and level of FoxM1b, which would greatly facilitate therapeutic interventions that focus on targeting the PLK1-mediated and/or FoxM1-mediated signaling network.
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Affiliation(s)
- Jinglei Zhang
- From the Department of Human and Molecular Genetics, Virginia Commonwealth University Institute of Molecular Genetics, Virginia Commonwealth University Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298
| | - Chengfu Yuan
- From the Department of Human and Molecular Genetics, Virginia Commonwealth University Institute of Molecular Genetics, Virginia Commonwealth University Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298
| | - Jianguo Wu
- From the Department of Human and Molecular Genetics, Virginia Commonwealth University Institute of Molecular Genetics, Virginia Commonwealth University Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298
| | - Zeinab Elsayed
- From the Department of Human and Molecular Genetics, Virginia Commonwealth University Institute of Molecular Genetics, Virginia Commonwealth University Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298
| | - Zheng Fu
- From the Department of Human and Molecular Genetics, Virginia Commonwealth University Institute of Molecular Genetics, Virginia Commonwealth University Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond, Virginia 23298
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33
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Feligioni M, Marcelli S, Knock E, Nadeem U, Arancio O, E. Fraser P. SUMO modulation of protein aggregation and degradation. AIMS MOLECULAR SCIENCE 2015. [DOI: 10.3934/molsci.2015.4.382] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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34
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Lee A, Jeong D, Mitsuyama S, Oh JG, Liang L, Ikeda Y, Sadoshima J, Hajjar RJ, Kho C. The role of SUMO-1 in cardiac oxidative stress and hypertrophy. Antioxid Redox Signal 2014; 21:1986-2001. [PMID: 24893265 PMCID: PMC4208582 DOI: 10.1089/ars.2014.5983] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AIMS Small ubiquitin-like modifier type 1 (SUMO-1) has been shown to play a critical role in the dysfunction of the cardiac isoform of sarcoplasmic reticulum calcium ATPase (SERCA2a) pump in the setting of heart failure. In cardiac hypertrophy, the role of SUMO-1 has not been defined and our study's goals were to examine the effects of modulating SUMO-1 on the hypertrophic response both in vitro and in vivo and to examine whether oxidative stress (during cardiac hypertrophy) is abrogated by SUMO-1 gene transfer. RESULTS In mice undergoing transverse aortic constriction (TAC), SUMO-1 levels increased slightly during the compensated stage of hypertrophy and then dropped sharply during the transition to heart failure. In isolated cardiomyocytes, SUMO-1 gene transfer inhibited the hypertrophic response in the presence of phenylephrine. Adeno-associated vector type 9 (AAV9) gene transfer of SUMO-1 prevented the heart from undergoing hypertrophy after TAC and prevented the development of left ventricular dysfunction. Furthermore, SUMO-1 gene transfer blocked the negative effects of H2O2 on SERCA2a activity in cardiac myocytes, while in vivo indices of oxidative stress were decreased by SUMO-1 in cardiac hypertrophy and heart failure. INNOVATION AND CONCLUSION The results of this study indicate that post-translational modifications of SERCA2a caused by the toxic environment of the hypertrophied and failing myocardium can be prevented by SUMO-1. Antioxid. Redox Signal. 21, 1986-2001.
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Affiliation(s)
- Ahyoung Lee
- 1 Department of Cardiology, Cardiovascular Research Center , Icahn School of Medicine at Mount Sinai, New York, New York
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35
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SUMOylation at K340 inhibits tau degradation through deregulating its phosphorylation and ubiquitination. Proc Natl Acad Sci U S A 2014; 111:16586-91. [PMID: 25378699 DOI: 10.1073/pnas.1417548111] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Intracellular accumulation of the abnormally modified tau is hallmark pathology of Alzheimer's disease (AD), but the mechanism leading to tau aggregation is not fully characterized. Here, we studied the effects of tau SUMOylation on its phosphorylation, ubiquitination, and degradation. We show that tau SUMOylation induces tau hyperphosphorylation at multiple AD-associated sites, whereas site-specific mutagenesis of tau at K340R (the SUMOylation site) or simultaneous inhibition of tau SUMOylation by ginkgolic acid abolishes the effect of small ubiquitin-like modifier protein 1 (SUMO-1). Conversely, tau hyperphosphorylation promotes its SUMOylation; the latter in turn inhibits tau degradation with reduction of solubility and ubiquitination of tau proteins. Furthermore, the enhanced SUMO-immunoreactivity, costained with the hyperphosphorylated tau, is detected in cerebral cortex of the AD brains, and β-amyloid exposure of rat primary hippocampal neurons induces a dose-dependent SUMOylation of the hyperphosphorylated tau. Our findings suggest that tau SUMOylation reciprocally stimulates its phosphorylation and inhibits the ubiquitination-mediated tau degradation, which provides a new insight into the AD-like tau accumulation.
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36
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Lee HS, Lim YS, Park EM, Baek SH, Hwang SB. SUMOylation of nonstructural 5A protein regulates hepatitis C virus replication. J Viral Hepat 2014; 21:e108-17. [PMID: 24602294 DOI: 10.1111/jvh.12241] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 01/15/2014] [Indexed: 12/17/2022]
Abstract
Viruses exploit cellular SUMOylation machinery to favour their own propagation. We show that NS5A is a target protein of small ubiquitin-like modifier (SUMO) and is SUMOylated at lysine residue 348. We demonstrated that SUMOylation increased protein stability of NS5A by inhibiting ubiquitylation, and SUMOylation was also required for protein interaction with NS5B. These data imply that SUMO modification may contribute to HCV replication. Indeed, silencing of UBC9 impaired HCV replication in Jc1-infected cells, and HCV replication level was also significantly reduced in SUMO-defective subgenomic replicon cells. Taken together, these data indicate that HCV replication is regulated by SUMO modification of NS5A protein. We provide evidence for the first time that HCV exploits host cellular SUMO modification system to favour its own replication.
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Affiliation(s)
- H S Lee
- National Research Laboratory of Hepatitis C Virus, Ilsong Institute of Life Science, Hallym University, Anyang, Korea
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37
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Study of MDM2 and SUMO-1 expression in actinic cheilitis and lip cancer. Arch Dermatol Res 2014; 306:837-41. [DOI: 10.1007/s00403-014-1500-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 08/26/2014] [Accepted: 09/07/2014] [Indexed: 01/10/2023]
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38
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Stojkovic K, Wing SS, Cermakian N. A central role for ubiquitination within a circadian clock protein modification code. Front Mol Neurosci 2014; 7:69. [PMID: 25147498 PMCID: PMC4124793 DOI: 10.3389/fnmol.2014.00069] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/08/2014] [Indexed: 11/19/2022] Open
Abstract
Circadian rhythms, endogenous cycles of about 24 h in physiology, are generated by a master clock located in the suprachiasmatic nucleus of the hypothalamus and other clocks located in the brain and peripheral tissues. Circadian disruption is known to increase the incidence of various illnesses, such as mental disorders, metabolic syndrome, and cancer. At the molecular level, periodicity is established by a set of clock genes via autoregulatory translation–transcription feedback loops. This clock mechanism is regulated by post-translational modifications such as phosphorylation and ubiquitination, which set the pace of the clock. Ubiquitination in particular has been found to regulate the stability of core clock components but also other clock protein functions. Mutation of genes encoding ubiquitin ligases can cause either elongation or shortening of the endogenous circadian period. Recent research has also started to uncover roles for deubiquitination in the molecular clockwork. Here, we review the role of the ubiquitin pathway in regulating the circadian clock and we propose that ubiquitination is a key element in a clock protein modification code that orchestrates clock mechanisms and circadian behavior over the daily cycle.
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Affiliation(s)
- Katarina Stojkovic
- Douglas Mental Health University Institute, McGill University, Montréal, QC Canada
| | - Simon S Wing
- Polypeptide Laboratory, Department of Medicine-McGill University Health Centre Research Institute, McGill University, Montréal, QC Canada
| | - Nicolas Cermakian
- Douglas Mental Health University Institute, McGill University, Montréal, QC Canada
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39
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Zhang H, Kuai X, Ji Z, Li Z, Shi R. Over-expression of small ubiquitin-related modifier-1 and sumoylated p53 in colon cancer. Cell Biochem Biophys 2014; 67:1081-7. [PMID: 23640307 DOI: 10.1007/s12013-013-9612-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Here we investigated whether the cellular accumulation of p53 protein caused by over-expression of small ubiquitin-related modifier-1 (SUMO-1) could be used as a predictive marker for prognosis in colon cancer. We detected SUMO-1 and p53 protein levels in 46 cases of colon cancer and adjacent tissues by immunohistochemistry and found that SUMO-1 was expressed at much higher levels in colon cancer compared with that in normal colon tissue. Immunoprecipitation and Western blot analysis revealed that the tumor suppressor p53 was present predominantly in the sumoylated rather than the non-sumoylated form in the colon cancer cell lines. A small interfering RNA targeted to SUMO-1 mRNA sequences was used to observe the levels of the p53 protein. Patients who showed high dual expressions of SUMO-1 and p53 tended to experience metastasis more frequently. These results suggest that the cellular accumulation of p53 protein caused by over-expression of SUMO-1 may be involved in tumor aggressiveness. Multivariate analysis confirmed that the high dual expression of SUMO-1 and p53 was an independent factor for evaluating prognosis. SUMO-1 may be useful as a novel target for therapy in colon cancer as well as a clinical indicator for tumor aggressiveness.
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Affiliation(s)
- Hongjie Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
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40
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Atkin G, Paulson H. Ubiquitin pathways in neurodegenerative disease. Front Mol Neurosci 2014; 7:63. [PMID: 25071440 PMCID: PMC4085722 DOI: 10.3389/fnmol.2014.00063] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 06/19/2014] [Indexed: 12/11/2022] Open
Abstract
Control of proper protein synthesis, function, and turnover is essential for the health of all cells. In neurons these demands take on the additional importance of supporting and regulating the highly dynamic connections between neurons that are necessary for cognitive function, learning, and memory. Regulating multiple unique synaptic protein environments within a single neuron while maintaining cell health requires the highly regulated processes of ubiquitination and degradation of ubiquitinated proteins through the proteasome. In this review, we examine the effects of dysregulated ubiquitination and protein clearance on the handling of disease-associated proteins and neuronal health in the most common neurodegenerative diseases.
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Affiliation(s)
- Graham Atkin
- Department of Neurology, University of Michigan Ann Arbor, MI, USA
| | - Henry Paulson
- Department of Neurology, University of Michigan Ann Arbor, MI, USA
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41
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Zhang DH, Zhang LY, Liu DJ, Yang F, Zhao JZ. Expression and significance of MMP-9 and MDM2 in the oncogenesis of lung cancer in rats. ASIAN PAC J TROP MED 2014; 7:585-8. [DOI: 10.1016/s1995-7645(14)60099-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 04/15/2014] [Accepted: 05/15/2014] [Indexed: 11/16/2022] Open
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42
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Zhou Q, Zhang L, Chen Z, Zhao P, Ma Y, Yang B, He Q, Ying M. Small ubiquitin-related modifier-1 modification regulates all-trans-retinoic acid-induced differentiation via stabilization of retinoic acid receptor α. FEBS J 2014; 281:3032-47. [DOI: 10.1111/febs.12840] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 04/17/2014] [Accepted: 05/09/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Qian Zhou
- Institute of Pharmacology & Toxicology; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou China
| | - Lei Zhang
- Institute of Pharmacology & Toxicology; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou China
| | - Zibo Chen
- College of Materials Science and Engineering; Central South University of Forestry and Technology; Changsha China
| | - Pingge Zhao
- Department of Clinical Pharmacy; Yiwu Central Hospital; China
| | - Yaxi Ma
- Department of Gynecology; the Second Affiliated Hospital; School of Medicine; Zhejiang University; Hangzhou China
| | - Bo Yang
- Institute of Pharmacology & Toxicology; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou China
| | - Qiaojun He
- Institute of Pharmacology & Toxicology; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou China
| | - Meidan Ying
- Institute of Pharmacology & Toxicology; Zhejiang Province Key Laboratory of Anti-Cancer Drug Research; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou China
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Kim JH, Jang JW, Lee YS, Lee JW, Chi XZ, Li YH, Kim MK, Kim DM, Choi BS, Kim J, Kim HM, van Wijnen A, Park I, Bae SC. RUNX family members are covalently modified and regulated by PIAS1-mediated sumoylation. Oncogenesis 2014; 3:e101. [PMID: 24777122 PMCID: PMC4007197 DOI: 10.1038/oncsis.2014.15] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 02/16/2014] [Accepted: 02/27/2014] [Indexed: 12/15/2022] Open
Abstract
Transcription factors of the RUNX family (RUNXs), which play pivotal roles in normal development and neoplasia, are regulated by various post-translational modifications. To understand the molecular mechanisms underlying the regulation of RUNXs, we performed a large-scale functional genetic screen of a fly mutant library. The screen identified dPias (the fly ortholog of mammalian PIASs), an E3 ligase for the SUMO (small ubiquitin-like modifier) modification, as a novel genetic modifier of lz (the fly ortholog of mammalian RUNX3). Molecular biological analysis revealed that lz/RUNXs are sumoylated by dPias/PIAS1 at an evolutionarily conserved lysine residue (K372 of lz, K144 of RUNX1, K181 of RUNX2 and K148 of RUNX3). PIAS1-mediated sumoylation inhibited RUNX3 transactivation activity, and this modification was promoted by the AKT1 kinase. Importantly, PIAS1 failed to sumoylate some RUNX1 mutants associated with breast cancer. In nude mice, tumorigenicity was promoted by RUNX3 bearing a mutation in the sumoylation site, but suppressed by wild-type RUNX3. Our results suggest that RUNXs are sumoylated by PIAS1, and that this modification could play a critical role in the regulation of the tumor-suppressive activity of these proteins.
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Affiliation(s)
- J-H Kim
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - J-W Jang
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Y-S Lee
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - J-W Lee
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - X-Z Chi
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - Y-H Li
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - M-K Kim
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - D-M Kim
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - B-S Choi
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - J Kim
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
| | - H-M Kim
- Gachon Institute of Pharmaceutical Sciences, Gachon University, Incheon, South Korea
| | - A van Wijnen
- Department of Orthopedic Surgery and Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, USA
| | - Ily Park
- College of Pharmacy, Chungbuk National University, Cheongju, South Korea
| | - S-C Bae
- Department of Biochemistry, College of Medicine, Chungbuk National University, Cheongju, South Korea
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Gromowski T, Masojć B, Scott RJ, Cybulski C, Górski B, Kluźniak W, Paszkowska-Szczur K, Rozmiarek A, Dębniak B, Maleszka R, Kładny J, Lubiński J, Dębniak T. Prevalence of the E318K and V320I MITF germline mutations in Polish cancer patients and multiorgan cancer risk-a population-based study. Cancer Genet 2014; 207:128-32. [PMID: 24767713 DOI: 10.1016/j.cancergen.2014.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/17/2014] [Accepted: 03/07/2014] [Indexed: 10/25/2022]
Abstract
The E318K mutation in the MITF gene has been associated with a high risk of melanoma, renal cell carcinoma, and pancreatic cancer; the risk of other cancers has not been evaluated so far. Herein, we examined the possible association of E318K and a novel variant of the MITF gene, V320I, with the risk of cancers of different sites of origin in a Polish population. We assayed for the presence of the E318K and V320I missense mutations in 4,226 patients with one of six various cancers (melanoma or cancer of the kidney, lung, prostate, colon, or breast) and 2,114 controls from Poland. The E318K mutation was detected in 4 of 2,114 participants (0.19%) in the Polish control population, the V320I in 3 of 2,114 participants (0.14%) in the control group. We found no statistically significant differences in the prevalence of the E318K and V320I variants among cases and controls. We found two carriers of the E318K variant among melanoma patients (P = 0.95), one carrier among breast cancer patients (P = 0.77), one carrier among colorectal cancer patients (P = 0.82), and one carrier among kidney cancer patients (P = 0.64). Our study demonstrates a lack of strong association of E318K and V320I with increased risk of melanoma or cancers of the kidney, breast, prostate, lung, or colon.
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Affiliation(s)
- Tomasz Gromowski
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland.
| | - Bartłomiej Masojć
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Rodney J Scott
- Discipline of Medical Genetics, Faculty of Health, University of Newcastle and Hunter Medical Research Institute, Newcastle, NSW, Australia
| | - Cezary Cybulski
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Bohdan Górski
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Wojciech Kluźniak
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Katarzyna Paszkowska-Szczur
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | | | - Bogusław Dębniak
- Chair and Clinic of Mother's and Child's Health, Medical University, Poznań, Poland
| | - Romuald Maleszka
- Department of Dermatology and Venereology, Pomeranian Medical University, Szczecin, Poland
| | - Józef Kładny
- Department of General and Oncological Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Jan Lubiński
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Tadeusz Dębniak
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
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Marinho HS, Real C, Cyrne L, Soares H, Antunes F. Hydrogen peroxide sensing, signaling and regulation of transcription factors. Redox Biol 2014; 2:535-62. [PMID: 24634836 PMCID: PMC3953959 DOI: 10.1016/j.redox.2014.02.006] [Citation(s) in RCA: 558] [Impact Index Per Article: 55.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 02/19/2014] [Accepted: 02/21/2014] [Indexed: 12/12/2022] Open
Abstract
The regulatory mechanisms by which hydrogen peroxide (H2O2) modulates the activity of transcription factors in bacteria (OxyR and PerR), lower eukaryotes (Yap1, Maf1, Hsf1 and Msn2/4) and mammalian cells (AP-1, NRF2, CREB, HSF1, HIF-1, TP53, NF-κB, NOTCH, SP1 and SCREB-1) are reviewed. The complexity of regulatory networks increases throughout the phylogenetic tree, reaching a high level of complexity in mammalians. Multiple H2O2 sensors and pathways are triggered converging in the regulation of transcription factors at several levels: (1) synthesis of the transcription factor by upregulating transcription or increasing both mRNA stability and translation; (ii) stability of the transcription factor by decreasing its association with the ubiquitin E3 ligase complex or by inhibiting this complex; (iii) cytoplasm–nuclear traffic by exposing/masking nuclear localization signals, or by releasing the transcription factor from partners or from membrane anchors; and (iv) DNA binding and nuclear transactivation by modulating transcription factor affinity towards DNA, co-activators or repressors, and by targeting specific regions of chromatin to activate individual genes. We also discuss how H2O2 biological specificity results from diverse thiol protein sensors, with different reactivity of their sulfhydryl groups towards H2O2, being activated by different concentrations and times of exposure to H2O2. The specific regulation of local H2O2 concentrations is also crucial and results from H2O2 localized production and removal controlled by signals. Finally, we formulate equations to extract from typical experiments quantitative data concerning H2O2 reactivity with sensor molecules. Rate constants of 140 M−1 s−1 and ≥1.3 × 103 M−1 s−1 were estimated, respectively, for the reaction of H2O2 with KEAP1 and with an unknown target that mediates NRF2 protein synthesis. In conclusion, the multitude of H2O2 targets and mechanisms provides an opportunity for highly specific effects on gene regulation that depend on the cell type and on signals received from the cellular microenvironment. Complexity of redox regulation increases along the phylogenetic tree. Complex regulatory networks allow for a high degree of H2O2 biological plasticity. H2O2 modulates gene expression at all steps from transcription to protein synthesis. Fast response (s) is mediated by sensors with high H2O2 reactivity. Low reactivity H2O2 sensors may mediate slow (h) or localized H2O2 responses.
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Affiliation(s)
- H. Susana Marinho
- Departamento de Química e Bioquímica, Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Carla Real
- Departamento de Química e Bioquímica, Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Luísa Cyrne
- Departamento de Química e Bioquímica, Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Helena Soares
- Departamento de Química e Bioquímica, Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Escola Superior de Tecnologia da Saúde de Lisboa, IPL, Lisboa, Portugal
| | - Fernando Antunes
- Departamento de Química e Bioquímica, Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
- Corresponding author.
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Heyne K, Förster J, Schüle R, Roemer K. Transcriptional repressor NIR interacts with the p53-inhibiting ubiquitin ligase MDM2. Nucleic Acids Res 2014; 42:3565-79. [PMID: 24413661 PMCID: PMC3973334 DOI: 10.1093/nar/gkt1371] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
NIR (novel INHAT repressor) can bind to p53 at promoters and inhibit p53-mediated gene transactivation by blocking histone acetylation carried out by p300/CBP. Like NIR, the E3 ubiquitin ligase MDM2 can also bind and inhibit p53 at promoters. Here, we present data indicating that NIR, which shuttles between the nucleolus and nucleoplasm, not only binds to p53 but also directly to MDM2, in part via the central acidic and zinc finger domain of MDM2 that is also contacted by several other nucleolus-based MDM2/p53-regulating proteins. Like some of these, NIR was able to inhibit the ubiquitination of MDM2 and stabilize MDM2; however, unlike these nucleolus-based MDM2 regulators, NIR did not inhibit MDM2 to activate p53. Rather, NIR cooperated with MDM2 to repress p53-induced transactivation. This cooperative repression may at least in part involve p300/CBP. We show that NIR can block the acetylation of p53 and MDM2. Non-acetylated p53 has been documented previously to more readily associate with inhibitory MDM2. NIR may thus help to sustain the inhibitory p53:MDM2 complex, and we present evidence suggesting that all three proteins can indeed form a ternary complex. In sum, our findings suggest that NIR can support MDM2 to suppress p53 as a transcriptional activator.
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Affiliation(s)
- Kristina Heyne
- José Carreras Research Center and Internal Medicine I, University of Saarland Medical Center, 66421 Homburg/Saar, Germany and Department of Urology, Center for Clinical Research, University of Freiburg, 79106 Freiburg, Germany
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Kim JS, Kim EJ, Oh JS, Park IC, Hwang SG. CIP2A modulates cell-cycle progression in human cancer cells by regulating the stability and activity of Plk1. Cancer Res 2013; 73:6667-78. [PMID: 23983103 DOI: 10.1158/0008-5472.can-13-0888] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abnormal cell-cycle control can lead to aberrant cell proliferation and cancer. The oncoprotein cancerous inhibitor of protein phosphatase 2A (CIP2A) is an inhibitor of protein phosphatase 2A (PP2A) that stabilizes c-Myc. However, the precise role of CIP2A in cell division is not understood. Herein, we show that CIP2A is required for mitotic progression by regulating the polo-like kinase (Plk1). With mitotic entry, CIP2A translocated from the cytoplasm to the nucleus, where it was enriched at spindle poles. CIP2A depletion delayed mitotic progression, resulting in mitotic abnormalities independent of PP2A activity. Unexpectedly, CIP2A interacted directly with the polo-box domain of Plk1 during mitosis. This interaction was required to maintain Plk1 stability by blocking APC/C-Cdh1-dependent proteolysis, thereby enhancing the kinase activity of Plk1 during mitosis. We observed strong correlation and in vivo interactions between these two proteins in multiple human cancer specimens. Overall, our results established a novel function for CIP2A in facilitating the stability and activity of the pivotal mitotic kinase Plk1 in cell-cycle progression and tumor development.
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Affiliation(s)
- Jae-Sung Kim
- Authors' Affiliations: Divisions of Radiation Cancer Research and Radiation Effect, Korea Institute of Radiological and Medical Sciences, Seoul; and Department of Genetic Engineering, Sungkyunkwan University, Suwon, South Korea
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USP7 inhibitor P22077 inhibits neuroblastoma growth via inducing p53-mediated apoptosis. Cell Death Dis 2013; 4:e867. [PMID: 24136231 PMCID: PMC3920959 DOI: 10.1038/cddis.2013.400] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 08/23/2013] [Accepted: 09/02/2013] [Indexed: 01/06/2023]
Abstract
Neuroblastoma (NB) is a common pediatric cancer and contributes to more than 15% of all pediatric cancer-related deaths. Unlike adult tumors, recurrent somatic mutations in NB, such as tumor protein 53 (p53) mutations, occur with relative paucity. In addition, p53 downstream function is intact in NB cells with wild-type p53, suggesting that reactivation of p53 may be a viable therapeutic strategy for NB treatment. Herein, we report that the ubiquitin-specific protease 7 (USP7) inhibitor, P22077, potently induces apoptosis in NB cells with an intact USP7-HDM2-p53 axis but not in NB cells with mutant p53 or without human homolog of MDM2 (HDM2) expression. In this study, we found that P22077 stabilized p53 by inducing HDM2 protein degradation in NB cells. P22077 also significantly augmented the cytotoxic effects of doxorubicin (Dox) and etoposide (VP-16) in NB cells with an intact USP7-HDM2-p53 axis. Moreover, P22077 was found to be able to sensitize chemoresistant LA-N-6 NB cells to chemotherapy. In an in vivo orthotopic NB mouse model, P22077 significantly inhibited the xenograft growth of three NB cell lines. Database analysis of NB patients shows that high expression of USP7 significantly predicts poor outcomes. Together, our data strongly suggest that targeting USP7 is a novel concept in the treatment of NB. USP7-specific inhibitors like P22077 may serve not only as a stand-alone therapy but also as an effective adjunct to current chemotherapeutic regimens for treating NB with an intact USP7-HDM2-p53 axis.
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49
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Guo Z, Wang X, Li H, Gao Y. Screening E3 substrates using a live phage display library. PLoS One 2013; 8:e76622. [PMID: 24124579 PMCID: PMC3790729 DOI: 10.1371/journal.pone.0076622] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Accepted: 08/26/2013] [Indexed: 11/26/2022] Open
Abstract
Ubiquitin ligases (E3s) determine specificity of ubiquitination by recognizing target substrates. However, most of their substrates are unknown. Most known substrates have been identified using distinct approaches in different laboratories. We developed a high-throughput strategy using a live phage display library as E3 substrates in in vitro screening. His-ubiquitinated phage, enriched with Ni-beads, could effectively infect E. coli for amplification. Sixteen natural potential substrates and many unnatural potential substrates of E3 MDM2 were identified through 4 independent screenings. Some substrates were identified in different independent experiments. Additionally, 10 of 12 selected candidates were ubiquitinated by MDM2 in vitro, and 3 novel substrates, DDX42, TP53RK and RPL36a were confirmed ex vivo. The whole strategy is rather simple and efficient. Non-degradation substrates can be discovered. This strategy can be extended to any E3s as long as the E3 does not ubiquitinate the empty phage.
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Affiliation(s)
- Zhengguang Guo
- Department of Physiology and Pathophysiology, National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences/School of Basic Medicine, Peking Union Medical College, Beijing, China
- Department of Core Instrument Facility, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences/School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Xiaorong Wang
- Department of Physiology and Pathophysiology, National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences/School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Huihua Li
- Department of Pathology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences/School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Youhe Gao
- Department of Physiology and Pathophysiology, National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences/School of Basic Medicine, Peking Union Medical College, Beijing, China
- * E-mail:
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50
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Filosa G, Barabino SML, Bachi A. Proteomics strategies to identify SUMO targets and acceptor sites: a survey of RNA-binding proteins SUMOylation. Neuromolecular Med 2013; 15:661-76. [PMID: 23979992 DOI: 10.1007/s12017-013-8256-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 08/08/2013] [Indexed: 01/09/2023]
Abstract
SUMOylation is a protein posttranslational modification that participates in the regulation of numerous biological processes within the cells. Small ubiquitin-like modifier (SUMO) proteins are members of the ubiquitin-like protein family and, similarly to ubiquitin, are covalently linked to a lysine residue on a target protein via a multi-enzymatic cascade. To assess the specific mechanism triggered by SUMOylation, the identification of SUMO protein substrates and of the precise acceptor site to which SUMO is bound is of critical relevance. Despite hundreds of mammalian proteins have been described as targets of SUMOylation, the identification of the precise acceptor sites still represents an important analytical challenge because of the relatively low stoichiometry in vivo and the highly dynamic nature of this modification. Moreover, mass spectrometry-based identification of SUMOylated sites is hampered by the large peptide remnant of SUMO proteins that are left on the modified lysine residue upon tryptic digestion. The present review provides a survey of the strategies that have been exploited in order to enrich, purify and identify SUMOylation substrates and acceptor sites in human cells on a large-scale format. The success of the presented strategies helped to unravel the numerous activities of this modification, as it was shown by the exemplary case of the RNA-binding protein family, whose SUMOylation is here reviewed.
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Affiliation(s)
- Giuseppe Filosa
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milan, Italy
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