AARS1/2: dual functions in protein translation and metabolic- immune regulation.

Highly precise regulation of protein synthesis is critical for the homeostasis and functionality of living organisms. Alanyl-tRNA synthase (AARS1/2) plays a crucial role in this process. AARS1/2 are a class of enzymes that synthesize alanyl-tRNA in cells, participating in protein synthesis encoded by genes, and catalyzing the propionylation of lysine residues in proteins, thereby regulating protein function. This article reviews the research progress on the involvement of AARS1/2 in disease progression induced by protein mistranslation and in the regulation of the metabolic-immune interaction network, aiming to better understand the pathophysiological mechanisms of AARS1/2 and to provide a reference for the development of potential therapeutic drugs.