1e59: Difference between revisions

Revision as of 13:24, 21 February 2008

E.COLI COFACTOR-DEPENDENT PHOSPHOGLYCERATE MUTASE COMPLEXED WITH VANADATE

OverviewOverview

The structure of Escherichia coli cofactor-dependent phosphoglycerate mutase (dPGM), complexed with the potent inhibitor vanadate, has been determined to a resolution of 1.30 A (R-factor 0.159; R-free 0.213). The inhibitor is present in the active site, principally as divanadate, but with evidence of additional vanadate moieties at either end, and representing a different binding mode to that observed in the structural homologue prostatic acid phosphatase. The analysis reveals the enzyme-ligand interactions involved in inhibition of the mutase activity by vanadate and identifies a water molecule, observed in the native E.coli dPGM structure which, once activated by vanadate, may dephosphorylate the active protein. Rather than reflecting the active conformation previously observed for E.coli dPGM, the inhibited protein's conformation resembles that of the inactive dephosphorylated Saccharomyces cerevisiae dPGM. The provision of a high-resolution structure of both active and inactive forms of dPGM from a single organism, in conjunction with computational modelling of substrate molecules in the active site provides insight into the binding of substrates and the specific interactions necessary for three different activities, mutase, synthase and phosphatase, within a single active site. The sequence similarity of E.coli and human dPGMs allows us to correlate structure with clinical pathology.

About this StructureAbout this Structure

1E59 is a Single protein structure of sequence from Escherichia coli with and as ligands. Active as Phosphoglycerate mutase, with EC number 5.4.2.1 Known structural/functional Site: . Full crystallographic information is available from OCA.

ReferenceReference

Mechanistic implications for Escherichia coli cofactor-dependent phosphoglycerate mutase based on the high-resolution crystal structure of a vanadate complex., Bond CS, White MF, Hunter WN, J Mol Biol. 2002 Mar 8;316(5):1071-81. PMID:11884145

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 ==Overview==
-The structure of Escherichia coli cofactor-dependent phosphoglycerate, mutase (dPGM), complexed with the potent inhibitor vanadate, has been, determined to a resolution of 1.30 A (R-factor 0.159; R-free 0.213). The, inhibitor is present in the active site, principally as divanadate, but, with evidence of additional vanadate moieties at either end, and, representing a different binding mode to that observed in the structural, homologue prostatic acid phosphatase. The analysis reveals the, enzyme-ligand interactions involved in inhibition of the mutase activity, by vanadate and identifies a water molecule, observed in the native E.coli, dPGM structure which, once activated by vanadate, may dephosphorylate the, active protein. Rather than reflecting the active conformation previously, observed for E.coli dPGM, the inhibited protein's conformation resembles, that of the inactive dephosphorylated Saccharomyces cerevisiae dPGM. The, provision of a high-resolution structure of both active and inactive forms, of dPGM from a single organism, in conjunction with computational, modelling of substrate molecules in the active site provides insight into, the binding of substrates and the specific interactions necessary for, three different activities, mutase, synthase and phosphatase, within a, single active site. The sequence similarity of E.coli and human dPGMs, allows us to correlate structure with clinical pathology.
+The structure of Escherichia coli cofactor-dependent phosphoglycerate mutase (dPGM), complexed with the potent inhibitor vanadate, has been determined to a resolution of 1.30 A (R-factor 0.159; R-free 0.213). The inhibitor is present in the active site, principally as divanadate, but with evidence of additional vanadate moieties at either end, and representing a different binding mode to that observed in the structural homologue prostatic acid phosphatase. The analysis reveals the enzyme-ligand interactions involved in inhibition of the mutase activity by vanadate and identifies a water molecule, observed in the native E.coli dPGM structure which, once activated by vanadate, may dephosphorylate the active protein. Rather than reflecting the active conformation previously observed for E.coli dPGM, the inhibited protein's conformation resembles that of the inactive dephosphorylated Saccharomyces cerevisiae dPGM. The provision of a high-resolution structure of both active and inactive forms of dPGM from a single organism, in conjunction with computational modelling of substrate molecules in the active site provides insight into the binding of substrates and the specific interactions necessary for three different activities, mutase, synthase and phosphatase, within a single active site. The sequence similarity of E.coli and human dPGMs allows us to correlate structure with clinical pathology.
 ==About this Structure==
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 [[Category: Phosphoglycerate mutase]]
 [[Category: Single protein]]
-[[Category: Bond, C.S.]]
+[[Category: Bond, C S.]]
-[[Category: Hunter, W.N.]]
+[[Category: Hunter, W N.]]
 [[Category: CL]]
 [[Category: VO3]]
@@ Line 24: / Line 24: @@
 [[Category: vandate]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Feb  3 09:37:19 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:23:55 2008''