Protein
Serine hydroxymethyltransferase 1
Organism
Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Function
Catalyzes the reversible interconversion of serine and glycine with tetrahydrofolate (THF) serving as the one-carbon carrier. This reaction serves as the major source of one-carbon groups required for the biosynthesis of purines, thymidylate, methionine, and other important biomolecules. Also exhibits THF-independent aldolase activity toward beta-hydroxyamino acids, producing glycine and aldehydes, via a retro-aldol mechanism. Thus, is able to catalyze the cleavage of L-allo-threonine.
Similarity
Belongs to the SHMT family.
Sequence
MTAAPDARTTAVMSAPLAEVDPDIAELLAKELGRQRDTLEMIASENFVPRAVLQAQGSVLTNKYAEGLPGRRYYGGCEHVDVVENLARDRAKALFGAEFANVQPHSGAQANAAVLHALMSPGERLLGLDLANGGHLTHGMRLNFSGKLYENGFYGVDPATHLIDMDAVRATALEFRPKVIIAGWSAYPRVLDFAAFRSIADEVGAKLLVDMAHFAGLVAAGLHPSPVPHADVVSTTVHKTLGGGRSGLIVGKQQYAKAINSAVFPGQQGGPLMHVIAGKAVALKIAATPEFADRQRRTLSGARIIADRLMAPDVAKAGVSVVSGGTDVHLVLVDLRDSPLDGQAAEDLLHEVGITVNRNAVPNDPRPPMVTSGLRIGTPALATRGFGDTEFTEVADIIATALATGSSVDVSALKDRATRLARAFPLYDGLEEWSLVGR