Cysteine–tRNA ligase
In enzymology, a cysteine–tRNA ligase is an enzyme that catalyzes the chemical reaction:
The three substrates of this enzyme are ATP, -cysteine, and tRNA, whereas its three products are AMP, diphosphate, and -cysteinyl-tRNA.
This enzyme belongs to the family of ligases, specifically those forming carbon–oxygen bonds in aminoacyl-tRNA and related compounds. The systematic name of this enzyme class is -cysteine:tRNA ligase . Other names in common use include cysteinyl-tRNA synthetase, cysteinyl-transferRNA synthetase, cysteinyl-transfer ribonucleate synthetase, and cysteine translase. This enzyme participates in cysteine metabolism and aminoacyl-tRNA biosynthesis.