Sensing and Transmitting Intracellular Amino Acid Signals through Reversible Lysine AminoacylationsHe, X.D., Gong, W., Zhang, J.N., Nie, J., Yao, C.F., Guo, F.S., Lin, Y., Wu, X.H., Li, F., Li, J., Sun, W.C., Wang, E.D., An, Y.P., Tang, H.R., Yan, G.Q., Yang, P.Y., Wei, Y., Mao, Y.Z., Lin, P.C., Zhao, J.Y., Xu, Y., Xu, W., Zhao, S.M.
(2018) Cell Metab. 27: 151-166.e6
- PubMed: 29198988
- DOI: 10.1016/j.cmet.2017.10.015
- PubMed Abstract:
Amino acids are known regulators of cellular signaling and physiology, but how they are sensed intracellularly is not fully understood. Herein, we report that each aminoacyl-tRNA synthetase (ARS) senses its cognate amino acid sufficiency through cata ...
Amino acids are known regulators of cellular signaling and physiology, but how they are sensed intracellularly is not fully understood. Herein, we report that each aminoacyl-tRNA synthetase (ARS) senses its cognate amino acid sufficiency through catalyzing the formation of lysine aminoacylation (K-AA) on its specific substrate proteins. At physiologic levels, amino acids promote ARSs bound to their substrates and form K-AAs on the ɛ-amine of lysines in their substrates by producing reactive aminoacyl adenylates. The K-AA marks can be removed by deacetylases, such as SIRT1 and SIRT3, employing the same mechanism as that involved in deacetylation. These dynamically regulated K-AAs transduce signals of their respective amino acids. Reversible leucylation on ras-related GTP-binding protein A/B regulates activity of the mammalian target of rapamycin complex 1. Glutaminylation on apoptosis signal-regulating kinase 1 suppresses apoptosis. We discovered non-canonical functions of ARSs and revealed systematic and functional amino acid sensing and signal transduction networks.
Obstetrics and Gynecology Hospital of Fudan University, State Key Lab of Genetic Engineering, School of Life Sciences and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, PRC; Key Laboratory of Reproduction Regulation of NPFPC (SIPPR,IRD) and Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai 200032, PRC; State Key Laboratory of Biotherapy/ Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, PRC.