Structural highlights
FunctionPANE_ECOLI Catalyzes the NADPH-dependent reduction of ketopantoate into pantoic acid. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe crystal structure of Escherichia coli ketopantoate reductase in complex with 2'-monophosphoadenosine 5'-diphosphoribose, a fragment of NADP+ that lacks the nicotinamide ring, is reported. The ligand is bound at the enzyme active site in the opposite orientation to that observed for NADP+, with the adenine ring occupying the lipophilic nicotinamide pocket. Isothermal titration calorimetry with R31A and N98A mutants of the enzyme is used to show that the unusual ;reversed binding mode' observed in the crystal is triggered by changes in the protonation of binding groups at low pH. This research has important implications for fragment-based approaches to drug design, namely that the crystallization conditions and the chemical modification of ligands can have unexpected effects on the binding modes. pH-tuneable binding of 2'-phospho-ADP-ribose to ketopantoate reductase: a structural and calorimetric study.,Ciulli A, Lobley CM, Tuck KL, Smith AG, Blundell TL, Abell C Acta Crystallogr D Biol Crystallogr. 2007 Feb;63(Pt 2):171-8. Epub 2007, Jan 16. PMID:17242510[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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