- PMID:
16322581
- Authors:
- Longenecker KL, Stamper GF, Hajduk PJ, Fry EH, Jakob CG, Harlan JE, Edalji R, Bartley DM, Walter KA, Solomon LR, Holzman TF, Gu YG, Lerner CG, Beutel BA, Stoll VS
- Title:
- Structure of MurF from Streptococcus pneumoniae co-crystallized with a small molecule inhibitor exhibits interdomain closure.
- Journal:
- Protein Sci. 2005 Dec;14(12):3039-47.
- Abstract:
- In a broad genomics analysis to find novel protein targets for antibiotic discovery, MurF was identified as an essential gene product for Streptococcus pneumonia that catalyzes a critical reaction in the biosynthesis of the peptidoglycan in the formation of the cell wall. Lacking close relatives in mammalian biology, MurF presents attractive characteristics as a potential drug target. Initial screening of the Abbott small-molecule compound collection identified several compounds for further validation as pharmaceutical leads. Here we report the integrated efforts of NMR and X-ray crystallography, which reveal the multidomain structure of a MurF-inhibitor complex in a compact conformation that differs dramatically from related structures. The lead molecule is bound in the substrate-binding region and induces domain closure, suggestive of the domain arrangement for the as yet unobserved transition state conformation for MurF enzymes. The results form a basis for directed optimization of the compound lead by structure-based design to explore the suitability of MurF as a pharmaceutical target.