D-aminoacyl-tRNA deacylase

UniProtKB accession:  P0A6M4

Grouped By:  Matching UniProtKB accession

UniProtKB description:  An aminoacyl-tRNA editing enzyme that deacylates mischarged D-aminoacyl-tRNAs, has no observable editing activity on tRNAs charged with cognate L-amino acid (PubMed:10383414, PubMed:4292198, PubMed:10918062, PubMed:24302572, PubMed:27224426). Edits mischarged glycyl-tRNA(Ala) more efficiently than AlaRS (PubMed:28362257). Acts via tRNA-based rather than protein-based catalysis (PubMed:24302572, PubMed:27224426, PubMed:28362257). Rejects correctly charged L-amino acid-tRNAs from its binding site rather than specifically recognizing incorrectly charged D-amino acid-tRNAs (PubMed:27224426). Hydrolyzes correctly charged, achiral, glycyl-tRNA(Gly); GTP-bound EF-Tu (tested with T.thermophilus EF-Tu AC Q5SHN6) protects charged glycyl-tRNA(Gly) from hydrolysis, while increasing Dtd levels or inactivating EF-Tu decreases protection (PubMed:27224426). Hydrolyzes mischarged glycyl-tRNA(Ala) (but not seryl-tRNA(Ala)) even in the presence of EF-Tu, edits about 4-fold better than the editing domain of AlaRS (PubMed:28362257). Has greater activity on glycyl-tRNA(Ala) than glycyl-tRNA(Gly) due in part to its recognition of the conserved tRNA(Ala) G3.U70 wobble base pair (PubMed:28362257). Binds D-amino acids but not L-amino acids (PubMed:16902403). Overexpression of E.coli or P.falciparum Dtd is toxic in E.coli, toxicity can be rescued by supplementation with Gly (PubMed:27224426). By recycling D-aminoacyl-tRNA to D-amino acids and free tRNA molecules, this enzyme counteracts the toxicity associated with the formation of D-aminoacyl-tRNA entities in vivo and helps enforce protein L-homochirality (PubMed:15292242). Hydrolyzes D-tyrosyl-tRNA(Tyr) (PubMed:4292198, PubMed:10383414, PubMed:24302572, PubMed:27224426). Hydrolyzes D-phenylalanyl-tRNA(Phe) (PubMed:4292198, PubMed:24302572). Hydrolyzes D-aspartyl-tRNA(Asp) (PubMed:10918062). Hydrolyzes D-tryptophanyl-tRNA(Trp) (PubMed:10918062). Hydrolyzes glycyl-tRNA(Gly) (PubMed:27224426). Hydrolyzes glycyl-tRNA(Ala) (PubMed:28362257).