Isoprenoid compounds are a diverse group of natural products which are essential components in all cells. Isoprenoids are biosynthesized from the simple precursors isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). Eukaryotes, fungi, and some gram-positive bacteria produce IPP through the mevalonate (MVA) pathway whereas gram-negative and some gram-positive bacteria utilize the non-mevalonate or 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway. 1-Hydroxy-2-methyl-2-buten-4-yl 4-diphosphate (HDMAPP or HMBPP) is an intermediate in the non-mevalonate pathway and is biosynthesized from 2-C-Methyl-D-erythritol 2,4-cyclophosphate (cMEPP) by IspG (GcpE). It is the substrate for IspH (LytB) yielding IPP and DMAPP. In addition, HDMAPP is the most potent VγVδ T-cell activator identified.
Provided as the tris-ammonium salt
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