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Crystal structure of dehydrosqualene synthase (Crtm) aureus complexed with SQ-109Crystal structure of dehydrosqualene synthase (Crtm) aureus complexed with SQ-109
Structural highlights
Publication Abstract from PubMedWe 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[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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