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Zeng Z, Pan Q, Sun Y, Huang H, Chen X, Chen T, He B, Ye H, Zhu S, Pu K, Fang K, Huang W, Chen Y, Wang W. METTL3 protects METTL14 from STUB1-mediated degradation to maintain m 6 A homeostasis. EMBO Rep 2023; 24:e55762. [PMID: 36597993 PMCID: PMC9986817 DOI: 10.15252/embr.202255762] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 01/05/2023] Open
Abstract
N6 -Methyladenosine (m6 A) is an important RNA modification catalyzed by methyltransferase-like 3 (METTL3) and METTL14. m6 A homeostasis mediated by the methyltransferase (MTase) complex plays key roles in various biological processes. However, the mechanism underlying METTL14 protein stability and its role in m6 A homeostasis remain elusive. Here, we show that METTL14 stability is regulated by the competitive interaction of METTL3 with the E3 ligase STUB1. STUB1 directly interacts with METTL14 to mediate its ubiquitination at lysine residues K148, K156, and K162 for subsequent degradation, resulting in a significant decrease in total m6 A levels. The amino acid regions 450-454 and 464-480 of METTL3 are essential to promote METTL14 stabilization. Changes in STUB1 expression affect METTL14 protein levels, m6 A modification and tumorigenesis. Collectively, our findings uncover an ubiquitination mechanism controlling METTL14 protein levels to fine-tune m6 A homeostasis. Finally, we present evidence that modulating STUB1 expression to degrade METTL14 could represent a promising therapeutic strategy against cancer.
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Affiliation(s)
- Zhan‐Cheng Zeng
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Qi Pan
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Yu‐Meng Sun
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Heng‐Jing Huang
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Xiao‐Tong Chen
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Tian‐Qi Chen
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Bo He
- Department of Hepatobiliary, and Department of Anesthesiology, Sun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Hua Ye
- Department of Hepatobiliary, and Department of Anesthesiology, Sun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Shun‐Xin Zhu
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Ke‐Jia Pu
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Ke Fang
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Wei Huang
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Yue‐Qin Chen
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Wen‐Tao Wang
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory for Biocontrol, School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
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