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1g98

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{{STRUCTURE_1g98| PDB=1g98 | SCENE= }}
{{STRUCTURE_1g98| PDB=1g98 | SCENE= }}
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'''CRYSTAL STRUCTURE ANALYSIS OF RABBIT PHOSPHOGLUCOSE ISOMERASE COMPLEXED WITH 5-PHOSPHOARABINONATE, A TRANSITION STATE ANALOGUE'''
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===CRYSTAL STRUCTURE ANALYSIS OF RABBIT PHOSPHOGLUCOSE ISOMERASE COMPLEXED WITH 5-PHOSPHOARABINONATE, A TRANSITION STATE ANALOGUE===
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==Overview==
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Phosphoglucose isomerase (PGI; E.C. 5.3.1.9) catalyzes the second step in glycolysis, the interconversion of D-glucose-6-phosphate and D-fructose-6-phosphate. We determined the X-ray crystal structure of rabbit PGI complexed with a competitive inhibitor of isomerase activity, 5-phospho-D-arabinonate (5PAA), at 1.9 A resolution. 5PAA is a better mimic of the proposed cis-enediol(ate) intermediate than 6-phospho-D-gluconate, which was used in a previously reported crystal structure of rabbit PGI. The orientation of 5PAA bound in the enzyme active site predicts that active site residue Glu357 is the residue that transfers a proton between C2 and C1 of the proposed cis-enediol(ate) intermediate. Amino acid residues Arg272 and Lys210 are predicted to be involved in stabilizing the negative charge of the intermediate.
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{{ABSTRACT_PUBMED_11327814}}
==About this Structure==
==About this Structure==
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[[Category: Phosphoglucose isomerase]]
[[Category: Phosphoglucose isomerase]]
[[Category: Transition state analogue]]
[[Category: Transition state analogue]]
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Revision as of 01:55, 1 July 2008

Image:1g98.png

Template:STRUCTURE 1g98

CRYSTAL STRUCTURE ANALYSIS OF RABBIT PHOSPHOGLUCOSE ISOMERASE COMPLEXED WITH 5-PHOSPHOARABINONATE, A TRANSITION STATE ANALOGUE

Template:ABSTRACT PUBMED 11327814

About this Structure

1G98 is a Single protein structure of sequence from Oryctolagus cuniculus. Full crystallographic information is available from OCA.

Reference

Crystal structure of rabbit phosphoglucose isomerase complexed with 5-phospho-D-arabinonate identifies the role of Glu357 in catalysis., Jeffery CJ, Hardre R, Salmon L, Biochemistry. 2001 Feb 13;40(6):1560-6. PMID:11327814

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