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In enzymology, an asparagine-tRNA ligase is an enzyme that catalyzes the chemical reaction
The 3 substrates of this enzyme are ATP, L-asparagine, and tRNA, whereas its 3 products are AMP, diphosphate, and L-asparaginyl-tRNA.
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-asparagine:tRNAAsn ligase. Other names in common use include asparaginyl-tRNA synthetase, asparaginyl-transfer ribonucleate synthetase, asparaginyl transfer RNA synthetase, asparaginyl transfer ribonucleic acid synthetase, asparagyl-transfer RNA synthetase, and asparagine translase. This enzyme participates in alanine and aspartate metabolism and aminoacyl-trna biosynthesis.