Tags: Enzyme.
In enzymology a threonine-tRNA ligase (EC 6.1.1.3) is an enzyme that catalyzes the chemical reactionATP + L-threonine + tRNAThr AMP + diphosphate + L-threonyl-tRNAThrThe 3 substrates of this enzyme are ATP L-threonine and tRNA(Thr) whereas its 3 products are AMP diphosphate and L-threonyl-tRNA(Thr).This enzyme belongs to the family of ligases to be specific those forming carbon-oxygen bonds in aminoacyl-tRNA and related compounds.