Protein
Bifunctional IPC transferase and DIPP synthase
Organism
Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)
Function
Involved in biosynthesis of di-myo-inositol phosphate (DIP), a widespread organic solute in microorganisms adapted to hot environments. Catalyzes the condensation of CTP and L-myo-inositol-1-phosphate into CDP-L-myo-inositol, as well as the biosynthesis of di-myo-inositol-1,3'-phosphate-1'-phosphate (DIPP) from CDP-L-myo-inositol and L-myo-inositol-1-phosphate. The cytidylyltransferase is absolutely specific for CTP and L-myo-inositol-1-P. The DIPP synthase uses only L-myoinositol-1-phosphate as an alcohol acceptor, but CDP-glycerol, as well as CDP-L-myo-inositol and CDP-D-myoinositol, are recognized as alcohol donors.
Similarity
In the C-terminal section; belongs to the CDP-alcohol phosphatidyltransferase class-I family.
Sequence
MILPCESFNGVPSGCLIIEMNWYSVLKASTAIFFPEKYSSSTSSLSKRSPISAPMINVDGEYLKIFAGRIKLMKAVILAAGLGTRLGGVPKPLVRVGGCEIILRTMKLLSPHVSEFIIVASRYADDIDAFLKDKGFNYKIVRHDRPEKGNGYSLLVAKNHVEDRFILTMGDHVYSQQFIEKAVRGEGVIADREPRFVDIGEATKIRVEDGRVAKIGKDLREFDCVDTGFFVLDDSIFEHAEKLRDREEIPLSEIVKLARLPVTYVDGELWMDVDTKEDVRRANRALVSAAVKGSGDGFISRKINRKISTRISAAIVNKVNPNQMTLISFLVGAFSALASFFSIPLAGLLYQFSSILDGCDGEIARASLKMSKKGGYVDSILDRFVDFLFLAIIALLYPKTATVAMFAIFGSVMVSYTSEKYKAEFGESIFGKFRVLNYIPGKRDERIFLIMIFCLLSAISLQWIFWMFLFVAAISLTRVVVTLLAVLVSK