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Jeon BN, Yoon JH, Kim MK, Choi WI, Koh DI, Hur B, Kim K, Kim KS, Hur MW. Zbtb7c is a molecular 'off' and 'on' switch of Mmp gene transcription. Biochim Biophys Acta 2016; 1859:1429-1439. [PMID: 27646874 DOI: 10.1016/j.bbagrm.2016.09.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/14/2016] [Accepted: 09/15/2016] [Indexed: 10/21/2022]
Abstract
Matrix metalloproteinases (MMPs) are zinc-containing endopeptidases that play roles in cell proliferation, migration, differentiation, angiogenesis, and apoptosis. The expression of MMP gene is tightly regulated and shows cell- and tissue-specific expression patterns. Despite their differential expression, MMP genes have AP-1 (activator protein-1) binding elements within their promoters. Interestingly, c-JUN phosphorylation by cytokine signaling decreased its interaction with NCoR, but increased its interaction with p300, resulting in activation of MMP gene transcription. Here, we found that Zbtb7c (Kr-pok) is a critical component of a transcriptional repressor complex containing c-Jun and NCoR. c-Jun, bound at AP-1, interacts with Zbtb7c, which in turn recruits an NCoR/Hdac3 complex to repress several Mmp (-8, -10, -13, and -16) genes. The molecular interaction between c-Jun and Zbtb7c also prevents phosphorylation of c-Jun by p-Jnk, However, Zbtb7c phosphorylation by p-Jnk (induced by TNFα), and its (Zbtb7c) subsequent degradation by the ubiquitin-mediated proteasomal pathway, leads to c-Jun phosphorylation by p-Jnk. Promoter-bound p-c-Jun then recruits the coactivator p300 to upregulate Mmp gene. Overall, these findings show that Zbtb7c is a key molecule that recruits an NCoR/Hdac3 complex to inhibit phosphorylation of c-Jun, and thereby repress Mmp gene expression.
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Affiliation(s)
- Bu-Nam Jeon
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea
| | - Jae-Hyeon Yoon
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea
| | - Min-Kyeong Kim
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea
| | - Won-Il Choi
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea
| | - Dong-In Koh
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea
| | - Benjamin Hur
- Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul 151-744, Republic of Korea
| | - Kunhong Kim
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea
| | - Kyung-Sup Kim
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea
| | - Man-Wook Hur
- Brain Korea 21 Plus Project for Medical Science, Severance Biomedical Research Institute, Department of Biochemistry and Molecular Biology, Yonsei University School of Medicine, 50-1, Yonsei-Ro, SeoDaeMoon-Ku, Seoul 120-752, Republic of Korea.
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