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Appikonda S, Thakkar KN, Shah PK, Dent SYR, Andersen JN, Barton MC. Cross-talk between chromatin acetylation and SUMOylation of tripartite motif-containing protein 24 (TRIM24) impacts cell adhesion. J Biol Chem 2018. [PMID: 29523690 DOI: 10.1074/jbc.ra118.002233] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Proteins with domains that recognize and bind post-translational modifications (PTMs) of histones are collectively termed epigenetic readers. Numerous interactions between specific reader protein domains and histone PTMs and their regulatory outcomes have been reported, but little is known about how reader proteins may in turn be modulated by these interactions. Tripartite motif-containing protein 24 (TRIM24) is a histone reader aberrantly expressed in multiple cancers. Here, our investigation revealed functional cross-talk between histone acetylation and TRIM24 SUMOylation. Binding of TRIM24 to chromatin via its tandem PHD-bromodomain, which recognizes unmethylated lysine 4 and acetylated lysine 23 of histone H3 (H3K4me0/K23ac), led to TRIM24 SUMOylation at lysine residues 723 and 741. Inactivation of the bromodomain, either by mutation or with a small-molecule inhibitor, IACS-9571, abolished TRIM24 SUMOylation. Conversely, inhibition of histone deacetylation markedly increased TRIM24's interaction with chromatin and its SUMOylation. Of note, gene expression profiling of MCF7 cells expressing WT versus SUMO-deficient TRIM24 identified cell adhesion as the major pathway regulated by the cross-talk between chromatin acetylation and TRIM24 SUMOylation. In conclusion, our findings establish a new link between histone H3 acetylation and SUMOylation of the reader protein TRIM24, a functional connection that may bear on TRIM24's oncogenic function and may inform future studies of PTM cross-talk between histones and epigenetic regulators.
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Affiliation(s)
- Srikanth Appikonda
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, Houston, Texas 77030
| | - Kaushik N Thakkar
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, Houston, Texas 77030; University of Texas M.D. Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences at Houston, Houston, Texas 77030
| | - Parantu K Shah
- Institute for Applied Cancer Science, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
| | - Sharon Y R Dent
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, Houston, Texas 77030; University of Texas M.D. Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences at Houston, Houston, Texas 77030
| | - Jannik N Andersen
- Institute for Applied Cancer Science, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
| | - Michelle C Barton
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, Houston, Texas 77030; University of Texas M.D. Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences at Houston, Houston, Texas 77030.
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Fang Z, Zhang L, Liao Q, Wang Y, Yu F, Feng M, Xiang X, Xiong J. Regulation of TRIM24 by miR-511 modulates cell proliferation in gastric cancer. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2017; 36:17. [PMID: 28114950 PMCID: PMC5259882 DOI: 10.1186/s13046-017-0489-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 01/05/2017] [Indexed: 12/20/2022]
Abstract
Background Increasing evidence highlights the important roles of tripartite motif containing 24 (TRIM24) in tumor initiation and malignant progression in many tumors, including gastric cancer (GC). Although TRIM24 expression is remarkably upregulated during GC carcinogenesis, the molecular mechanisms underlying TRIM24 dysregulation remain unexplored. Methods In this study, miRNA target prediction tools were applied to explore miRNAs that potentially target TRIM24. Western blot and quantitative reverse-transcriptase PCR (qRT-PCR) were performed to detected TRIM24 and miR-511 expression in GC tissues and cell lines. Dual-luciferase reporter assay was utilized to validate if TRIM24 is a direct target gene of miR-511. CCK-8 assay, cell colony formation assay, EdU incorporation assay and cell cycle analysis were performed to determine whether miR-511-mediated regulation of TRIM24 could affect GC progression. Results In our study, miR-511 was found to be downregulated in GC and an inverse correlation was observed between TRIM24 and miR-511 expression in primary GC tissues and cell lines. Dual-luciferase reporter assay further verified TRIM24 is a direct target of miR-511. Functional assays showed miR-511 overexpression inhibited cell growth, colony formation ability and cell cycle progression. Conversely, inhibition of endogenous miR-511 promoted these phenotypes in GC cells. Moreover, reintroduction of TRIM24 rescued miR-511-induced inhibitory effects on GC cells. Furthermore, miR-511 elicits tumor-suppressive effects through inactivating PI3K/AKT and Wnt/β-catenin pathways by suppressing TRIM24. Conclusions Our results provide the new evidence supporting the tumor-suppressive role of miR-511 in GC by suppressing TRIM24, suggesting that this novel miR-511/TRIM24 axis is critical in the control of gastric cancer tumorigenesis. Electronic supplementary material The online version of this article (doi:10.1186/s13046-017-0489-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ziling Fang
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China
| | - Ling Zhang
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China
| | - Quan Liao
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China
| | - Yi Wang
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China
| | - Feng Yu
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China
| | - Miao Feng
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China
| | - Xiaojun Xiang
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China.
| | - Jianping Xiong
- Department of Oncology, the First Affiliated Hospital of Nanchang University, 17 Yongwaizheng Street, Donghu District, Nanchang, 330006, Jiangxi Province, China.
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Appikonda S, Thakkar KN, Barton MC. Regulation of gene expression in human cancers by TRIM24. DRUG DISCOVERY TODAY. TECHNOLOGIES 2016; 19:57-63. [PMID: 27769359 DOI: 10.1016/j.ddtec.2016.05.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 05/15/2016] [Accepted: 05/19/2016] [Indexed: 01/21/2023]
Abstract
Tripartite Motif-containing protein 24 (TRIM24) functions as an E3 ligase targeting p53 for ubiquitination, a histone 'reader' that interacts with a specific signature of histone post-translational modifications and a co-regulator of nuclear receptor-regulated transcription. Although mouse models of Trim24 depletion suggest that TRIM24 may be a liver-specific tumor suppressor, several studies show that human TRIM24 is an oncogene when aberrantly over expressed. This review focuses on the mechanisms of TRIM24 functions in oncogenesis and metabolic reprogramming, which underlie recent interest in therapeutic targeting of aberrant TRIM24 in human cancers.
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Affiliation(s)
- Srikanth Appikonda
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, Houston, TX 77030, USA
| | - Kaushik N Thakkar
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, Houston, TX 77030, USA; University of Texas Graduate School of Biomedical Sciences at Houston, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Michelle Craig Barton
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, Houston, TX 77030, USA; University of Texas Graduate School of Biomedical Sciences at Houston, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
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