Protein
Probable GTP 3',8-cyclase
Organism
Methanothermobacter marburgensis (strain ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 / Marburg)
Function
Catalyzes the cyclization of GTP to (8S)-3',8-cyclo-7,8-dihydroguanosine 5'-triphosphate.
Similarity
Belongs to the radical SAM superfamily. MoaA family.
Sequence
MQVHDNHRRPLVSLRISVTGRCNVSCIYCHRDGILRSDEEMSPEDIENICRVASDLGVKKIRLSGGEPLIRDDIVEIVEKINSIGFRDISITTNGTLLEDLSVPLRDAGLDRVNVSFDTLKPETYRFITRKDYLERVKAGIEGAVMAGLDPVKINMVILRGVNHHEIWDMFEFCRQQGAVLQIIELLKTDSCPDNGVERYHCDITPIEAELAEMADRIMTRKFMQDRKKYFIGDGEVEVVRPMDNTRFCANCTRLRVTPDGKLKPCLLRNDNLVDTKEALSSGDLEGLRELFLEAIRRRSPYYQS