This entry represents type 1 of two non-homologous families of the enzyme isopentenyl-diphosphate delta-isomerase (IPP isomerase; EC:5.3.3.2). IPP isomerase is a member of the Nudix hydrolase superfamily, and is a key enzyme in the isoprenoid biosynthetic pathway. It catalyses the interconversion of isopentenyl diphosphate (IPP) and dimethylallyl diphosphate. Dimethylallyl phosphate is the initial substrate for the biosynthesis of carotenoids and other long chain isoprenoids.
Defined by 9 residues: HIS:A-25HIS:A-32CYS:A-67HIS:A-69GLU:A-87TYR:A-104GLU:A-114GLU:A-116TRP:A-161