Dual-mode recognition of tRNA^Pro isoacceptors by Toxoplasma gondii Prolyl-tRNA synthetase.

ABSTRACT: Prolyl-tRNA synthetases (ProRSs) exhibit diverse domain architectures and motifs, evolving into prokaryotic (P-type) and eukaryotic/archaeal (E-type) variants. Both types exhibit high specificity for the recognition and aminoacylation of their cognate tRNAs. Interestingly, the parasitic eukaryote Toxoplasma gondii encodes a single E-type ProRS (TgProRS) but utilizes two distinct tRNA^Pro isoacceptors: a cytosolic E-type (with C72/C73) and an apicoplast P-type (with G72/A73). Our study demonstrates that TgProRS, despite being classified as an E-type enzyme, efficiently charges both tRNA^Pro isoacceptors and functionally compensates for yeast cytoplasmic and mitochondrial ProRS activities. Notably, while C72/C73 are dispensable for cytosolic tRNA^Pro charging, G

SUBMITTER: Ivanesthi IR 

PROVIDER: S-EPMC12152171 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature