This domain is found at the N-terminal end of CDP-alcohol phosphatidyltransferase family protein from Archaeoglobus fulgidus (AF_2299) and similar archaeal proteins. AF_2299 is a member of a family of membrane-embedded enzymes known as CDP-alcohol phosphotransferases (CDP-APs) involved in the formation of polar phospholipids. This integral membrane phosphotransferase is organised into two distinct domains. This entry represents the N-terminal cytoplasmic domain, which has structural similarity to the cytidyltransferases [1-3].

1: Structural basis for catalysis in a CDP-alcohol phosphotransferase. Sciara G, Clarke OB, Tomasek D, Kloss B, Tabuso S, Byfield R, Cohn R, Banerjee S, Rajashankar KR, Slavkovic V, Graziano JH, Shapiro L, Mancia F; Nat Commun. 2014;5:4068. PMID:24923293

2: Structural basis for phosphatidylinositol-phosphate biosynthesis. Clarke OB, Tomasek D, Jorge CD, Dufrisne MB, Kim M, Banerjee S, Rajashankar KR, Shapiro L, Hendrickson WA, Santos H, Mancia F; Nat Commun. 2015;6:8505. PMID:26510127

3: Structural and Functional Characterization of Phosphatidylinositol-Phosphate Biosynthesis in Mycobacteria. Belcher Dufrisne M, Jorge CD, Timoteo CG, Petrou VI, Ashraf KU, Banerjee S, Clarke OB, Santos H, Mancia F; J Mol Biol. 2020;432:5137-5151. PMID:32389689