Protein
4-amino-5-hydroxymethyl-2-methylpyrimidine phosphate synthase
Organism
Candida albicans (strain SC5314 / ATCC MYA-2876)
Function
Responsible for the formation of the pyrimidine heterocycle in the thiamine biosynthesis pathway. Catalyzes the formation of hydroxymethylpyrimidine phosphate (HMP-P) from histidine and pyridoxal phosphate (PLP). The protein uses PLP and the active site histidine to form HMP-P, generating an inactive enzyme. The enzyme can only undergo a single turnover, which suggests it is a suicide enzyme.
Similarity
Belongs to the NMT1/THI5 family.
Sequence
MSTNKITFLLNWEAAPYHIPVYLANIKGYFKDENLDIAILEPSNPSDVTELVGSGKVDMGLKAMVHTLAAKARGLPVTSIGSLLDEPFTGICYLEGSGITSDFQSLKGKRIGYVGEFGKIQVDELTKHYGMTPDDYVAVRCGMNVAKYILEGTIDCGIGIECIQQVELEEALKEQGKDSNDAKMLRIDKLAELGCCCFCTILYIANDKFIAENSQAVKKFLKAIKRATDYMLAHPREAWAEYGNFKPTMQTDLNTKKFQRCYAYFSESLYNVHRDWRKVNNYGKRLDILPENYVPNYTNEYLSWPEPKEVDDPEKAQDLMLKHQEECKTCGGYKRLVLA