Anticodon-binding domain of cysteinyl tRNA synthetases and domain found in MshC
This domain is found in cysteinyl tRNA synthetases (CysRS), which belong to the class Ia aminoacyl tRNA synthetases. It lies C-terminal to the catalytic core domain, and recognizes and specifically binds to the tRNA anticodon. CysRS catalyzes the transfer of cysteine to the 3'-end of its tRNA. The family also includes a domain of MshC, the rate-determining enzyme in the mycothiol biosynthetic pathway, which is specific to actinomycetes. The anticodon-binding site of CysRS lies C-terminal to this model's footprint and is not shared by MshC.