Protein
Threonine--tRNA ligase 2
Organism
Bacillus subtilis (strain 168)
Function
Catalyzes the attachment of threonine to tRNA(Thr) in a two-step reaction: L-threonine is first activated by ATP to form Thr-AMP and then transferred to the acceptor end of tRNA(Thr). Also edits incorrectly charged L-seryl-tRNA(Thr).
Similarity
Belongs to the class-II aminoacyl-tRNA synthetase family.
Sequence
MSKHVHIQLPDGQIQEYPKGITIKEAAGSISSSLQKKAAAGQVNGKLVDLSFKLEEDAELSIVTLDSQEGLQVLRHTTAHVLAQAVKRLYGEVSLGVGPVILDGFYYDMKLGKSLASGDLEAIEKEMKNIINENLEIKRIEVSYEEAEELFAQKDERLKLEILKDIPRGEDITLYQQGEFVDLCRGPHLPSTGMIKAFKLTRVSGAYWRGDSKNEVLQRVYGVAFQKKKDLDAHLHMLEEAAKRDHRKLGKQLGLFMFSEEAPGMPFYLPKGQIVRNELERFSRELQTNAGYDEVRTPFMMNQRLWEQSGHWDHYRDNMYFSEVDDTRFAMKPMNCPGHMLIFKNSLYSYRDLPIRMAEFGQVHRHEYSGALNGMLRVRTFCQDDAHIFVREDQIESEIKEAIRLIDEVYRTFGFEYSVELSTRPEDSLGDDSLWEASERALARVLEELGLSYEINEGDGAFYGPKIDFHIKDALKRSHQCATIQLDFQMPEKFDLTYINELNEKVRPVVIHRAVFGSIDRFFGILIEHYGGAFPVWLAPIQVQIIPVSHVHLDYCRKVQAELKQAGIRAGIDERNEKLGYKIRESQVQKIPYVLVLGDHEEQENAVNVRRFGHQQNEHVPFQTFKDKLVKQVENRGM