Terpenoids and steroids ppt

Pyruvate and glyceraldehyde 3-phosphate are converted by DOXP synthase (Dxs) to 1-deoxy-D-xylulose 5-phosphate, and by DOXP reductase (Dxr, IspC) to 2- C -methyl-D-erythritol 4-phosphate (MEP). The subsequent three reaction steps catalyzed by 4-diphosphocytidyl-2- C -methyl-D-erythritol synthase (YgbP, IspD), 4-diphosphocytidyl-2- C -methyl-D-erythritol kinase (YchB, IspE), and 2- C -methyl-D-erythritol 2,4-cyclodiphosphate synthase (YgbB, IspF) mediate the formation of 2- C -methyl-D-erythritol 2,4-cyclopyrophosphate (MEcPP). Finally, MEcPP is converted to ( E )-4-hydroxy-3-methyl-but-2-enyl pyrophosphate ( HMB-PP ) by HMB-PP synthase (GcpE, IspG), and HMB-PP is converted to isopentenyl pyrophosphate (IPP) and dimethylallyl pyrophosphate (DMAPP) by HMB-PP reductase (LytB, IspH).

Terpenoids and steroids ppt

terpenoids and steroids ppt

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