Function 
DXP reductoisomerase (DXR) or 1-deoxy-D-xylulose-5-phosphate reductoisomerase or IspC catalyzes the conversion of 1-deoxy-D-xylulose-5-phosphate (DXP) to 2-C-methyl-D-erythritol 4-phosphate.  DXR is part of the nonmevalonate pathway which synthesizes isoprenoids which are essential components of bacterial cell wall.  NADPH is a cofactor of the reaction.  Divalent metal cations (Mg+2, Mn+2) are involved in binding of the DXP substrate to DXR.[1]
  Disease 
The antibiotic fosmidomycin is a structural analog of 2-C-methyl-D-erythritol 4-phosphate is a powerful inhibitor of DXR and is used as an anti-malaria drug.
  Structural highlights 
DXR  contains Mn+2 cation and the product analog fosmidomycin.  (water molecules shown as red spheres).[2]