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Sun WX, Zhang KH, Zhou Q, Hu SH, Lin Y, Xu W, Zhao SM, Yuan YY. Tryptophanylation of insulin receptor by WARS attenuates insulin signaling. Cell Mol Life Sci 2024; 81:25. [PMID: 38212570 PMCID: PMC11072365 DOI: 10.1007/s00018-023-05082-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 01/13/2024]
Abstract
Increased circulating amino acid levels have been linked to insulin resistance and development of type 2 diabetes (T2D), but the underlying mechanism remains largely unknown. Herein, we show that tryptophan modifies insulin receptor (IR) to attenuate insulin signaling and impair glucose uptake. Mice fed with tryptophan-rich chow developed insulin resistance. Excessive tryptophan promoted tryptophanyl-tRNA synthetase (WARS) to tryptophanylate lysine 1209 of IR (W-K1209), which induced insulin resistance by inhibiting the insulin-stimulated phosphorylation of IR, AKT, and AS160. SIRT1, but not other sirtuins, detryptophanylated IRW-K1209 to increase the insulin sensitivity. Collectively, we unveiled the mechanisms of how tryptophan impaired insulin signaling, and our data suggested that WARS might be a target to attenuate insulin resistance in T2D patients.
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Affiliation(s)
- Wen-Xing Sun
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, People's Republic of China
| | - Kai-Hui Zhang
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China
- Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Jinan, People's Republic of China
- Children's Research Institute, Children's Hospital Affiliated to Shandong University (Jinan Children's Hospital), Jinan, People's Republic of China
| | - Qian Zhou
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China
- NHC Key Lab of Reproduction Regulation, Shanghai Key Laboratory of Metabolic Remodeling and Health, and Children's Hospital of Fudan University, Shanghai, People's Republic of China
| | - Song-Hua Hu
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China
- NHC Key Lab of Reproduction Regulation, Shanghai Key Laboratory of Metabolic Remodeling and Health, and Children's Hospital of Fudan University, Shanghai, People's Republic of China
| | - Yan Lin
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China
- NHC Key Lab of Reproduction Regulation, Shanghai Key Laboratory of Metabolic Remodeling and Health, and Children's Hospital of Fudan University, Shanghai, People's Republic of China
- Shanghai Fifth People's Hospital of Fudan University, Fudan University, Shanghai, People's Republic of China
| | - Wei Xu
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China
- NHC Key Lab of Reproduction Regulation, Shanghai Key Laboratory of Metabolic Remodeling and Health, and Children's Hospital of Fudan University, Shanghai, People's Republic of China
- Shanghai Fifth People's Hospital of Fudan University, Fudan University, Shanghai, People's Republic of China
| | - Shi-Min Zhao
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China.
- NHC Key Lab of Reproduction Regulation, Shanghai Key Laboratory of Metabolic Remodeling and Health, and Children's Hospital of Fudan University, Shanghai, People's Republic of China.
- Key Laboratory for Tibet Plateau Phytochemistry of Qinghai Province, College of Pharmacy, Qinghai University for Nationalities, Xining, People's Republic of China.
| | - Yi-Yuan Yuan
- Obstetrics and Gynecology Hospital of Fudan University, Institutes of Biomedical Sciences, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, People's Republic of China.
- NHC Key Lab of Reproduction Regulation, Shanghai Key Laboratory of Metabolic Remodeling and Health, and Children's Hospital of Fudan University, Shanghai, People's Republic of China.
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