Organism
Methanosarcina acetivorans (strain ATCC 35395 / DSM 2834 / JCM 12185 / C2A)
Function
Specifically catalyzes the beta-elimination of phosphate from L-phosphoserine and the beta-addition of sulfite to the dehydroalanine intermediate to produce L-cysteate. Does not display threonine synthase activity like the paralog protein ThrC.
Similarity
Belongs to the threonine synthase family. Cysteate synthase subfamily.
Sequence
MGRFILKCLKCGREYSQEYRLTCENDDSFLRAEYLEKKLELRKQPGIGRFHSWLPVQEELTTEAGPITYKSEALARELGLSNLYIGFSGYWPEKGAFIKTCSFKELEAHPTMQLLKESGGKAIVLASAGNTGRAFAHVSALTGTDVYIVVPDSGIPKLWLPEEPTDSIHLISMTPGNDYTDAINLAGRIAKLPGMVPEGGARNVARREGMGTVMLDAAVTIGKMPDHYFQAVGSGTGGISAWEASLRLREDGRFGSKLPKLQLTQNLPFVPMYNAWQEGRRDIIPEIDMKDAKKRIEETYATVLTNRAPPYSVTGGLYDALVDTDGIMYAVSKEEALDAKALFESLEGIDILPPSAVAAASLLKAVEAGNVGKDDTILLNIAGGGFKRLKEDFTLFQIEPEITVSNPDVPLEELKL