4q6a

Staphylococcus aureus V31L, F98Y Mutant Dihydrofolate Reductase Complexed with NADPH

spinqualitylabelsall models 4q6a, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4q6a is a 1 chain structure with sequence from Staphylococcus aureus MUF168. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.099Å Ligands: ACT, GOL, NAP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Methods to accurately predict potential drug target mutations in response to early-stage leads could drive the design of more resilient first generation drug candidates. In this study, a structure-based protein design algorithm (K* in the OSPREY suite) was used to prospectively identify single-nucleotide polymorphisms that confer resistance to an experimental inhibitor effective against dihydrofolate reductase (DHFR) from Staphylococcus aureus. Four of the top-ranked mutations in DHFR were found to be catalytically competent and resistant to the inhibitor. Selection of resistant bacteria in vitro reveals that two of the predicted mutations arise in the background of a compensatory mutation. Using enzyme kinetics, microbiology, and crystal structures of the complexes, we determined the fitness of the mutant enzymes and strains, the structural basis of resistance, and the compensatory relationship of the mutations. To our knowledge, this work illustrates the first application of protein design algorithms to prospectively predict viable resistance mutations that arise in bacteria under antibiotic pressure. Protein design algorithms predict viable resistance to an experimental antifolate.,Reeve SM, Gainza P, Frey KM, Georgiev I, Donald BR, Anderson AC Proc Natl Acad Sci U S A. 2015 Jan 20;112(3):749-54. doi:, 10.1073/pnas.1411548112. Epub 2014 Dec 31. PMID:25552560 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dihydrofolate reductase 3D structures

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