Tags: Protein.
Aminoacyl-tRNA synthetase class II (D K and N) (EC 6.1.1.) is a protein domain that catalyses the attachment of an amino acid to its cognate transfer RNA molecule in a highly specific two-step reaction. This protein differs widely in size and oligomeric state and has a limited sequence homology.The 20 aminoacyl-tRNA synthetases are divided into two classes I and II. Class I aminoacyl-tRNA synthetases contain a characteristic Rossman fold catalytic domain and are mostly monomeric.