1kq7
E315Q Mutant Form of Fumarase C from E.coliE315Q Mutant Form of Fumarase C from E.coli
Structural highlights
FunctionFUMC_ECOLI Catalyzes the reversible addition of water to fumarate to give L-malate.[1] 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 PubMedFumarase catalyzes the reversible conversion of fumarate to S- malate during the operation of the ubiquitous Kreb's cycle. Previous studies have shown that the active site includes side chains from three of the four subunits within the tetrameric enzyme. We used a clinically observed human mutation to narrow our search for potential catalytic groups within the fumarase active site. Offspring homozygous for the missense mutation, a G-955-C transversion in the fumarase gene, results in the substitution of a glutamine at amino acid 319 for the normal glutamic acid. To more fully understand the implications of this mutation, a single-step site-directed mutagenesis method was used to generate the homologous substitution at position 315 within fumarase C from Escherichia coli. Subsequent kinetic and X-ray crystal structure analyses show changes in the turnover number and the cocrystal structure with bound citrate. X-ray crystallographic and kinetic correlation of a clinically observed human fumarase mutation.,Estevez M, Skarda J, Spencer J, Banaszak L, Weaver TM Protein Sci. 2002 Jun;11(6):1552-7. PMID:12021453[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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