4ea2 | pdb_00004ea2

Crystal structure of dehydrosqualene synthase (Crtm) aureus complexed with SQ-109

spinqualitylabelsall models 4ea2, resolution 2.05Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4ea2 is a 1 chain structure with sequence from Staphylococcus aureus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: MG, RWZ, SRT Related: 4e9z, 4ea0, 4ea1 Gene: crtM (Staphylococcus aureus) Activity: 4,4'-diapophytoene synthase, with EC number 2.5.1.96 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed We report X-ray crystallographic structures of three inhibitors bound to dehydrosqualene synthase from Staphylococcus aureus: 1 (BPH-651), 2 (WC-9), and 3 (SQ-109). Compound 2 binds to the S2 site with its -SCN group surrounded by four hydrogen bond donors. With 1, we report two structures: in both, the quinuclidine headgroup binds in the allylic (S1) site with the side chain in S2, but in the presence of PPi and Mg(2+), the quinuclidine's cationic center interacts with PPi and three Mg(2+), mimicking a transition state involved in diphosphate ionization. With 3, there are again two structures. In one, the geranyl side chain binds to either S1 or S2 and the adamantane headgroup binds to S1. In the second, the side chain binds to S2 while the headgroup binds to S1. These results provide structural clues for the mechanism and inhibition of the head-to-head prenyl transferases and should aid future drug design. Head-to-Head Prenyl Tranferases: Anti-Infective Drug Targets.,Lin FY, Liu YL, Li K, Cao R, Zhu W, Axelson J, Pang R, Oldfield E J Med Chem. 2012 May 10;55(9):4367-72. Epub 2012 May 1. PMID:22486710 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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