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ⓘ Cysteine-tRNA ligase. In enzymology, a cysteine-tRNA ligase is an enzyme that catalyzes the chemical reaction ATP + L-cysteine + tRNACys ⇌ {\displaystyle \right ..



                                     

ⓘ Cysteine-tRNA ligase

In enzymology, a cysteine-tRNA ligase is an enzyme that catalyzes the chemical reaction

ATP + L-cysteine + tRNACys ⇌ {\displaystyle \rightleftharpoons } AMP + diphosphate + L-cysteinyl-tRNACys

The 3 substrates of this enzyme are ATP, L-cysteine, and tRNACys, whereas its 3 products are AMP, diphosphate, and L-cysteinyl-tRNACys.

This enzyme belongs to the family of ligases, to be specific those forming carbon-oxygen bonds in aminoacyl-tRNA and related compounds. The systematic name of this enzyme class is L-cysteine:tRNACys ligase AMP-forming. 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.

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