4pgm: Difference between revisions
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[[Image:4pgm.jpg|left|200px]]<br /><applet load="4pgm" size=" | [[Image:4pgm.jpg|left|200px]]<br /><applet load="4pgm" size="350" color="white" frame="true" align="right" spinBox="true" | ||
caption="4pgm, resolution 2.3Å" /> | caption="4pgm, resolution 2.3Å" /> | ||
'''SACCHAROMYCES CEREVISIAE PHOSPHOGLYCERATE MUTASE'''<br /> | '''SACCHAROMYCES CEREVISIAE PHOSPHOGLYCERATE MUTASE'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
4PGM is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Active as [http://en.wikipedia.org/wiki/Phosphoglycerate_mutase Phosphoglycerate mutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.4.2.1 5.4.2.1] Known structural/functional Site: <scene name='pdbsite=CIC:Catalytic Site. HIS 8 Phosphorylation Is Required To Pri ...'>CIC</scene>. Full crystallographic information is available from [http:// | 4PGM is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Active as [http://en.wikipedia.org/wiki/Phosphoglycerate_mutase Phosphoglycerate mutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.4.2.1 5.4.2.1] Known structural/functional Site: <scene name='pdbsite=CIC:Catalytic+Site.+HIS+8+Phosphorylation+Is+Required+To+Pri+...'>CIC</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4PGM OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: transferase (phosphoryl)]] | [[Category: transferase (phosphoryl)]] | ||
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Revision as of 11:53, 3 February 2008
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SACCHAROMYCES CEREVISIAE PHOSPHOGLYCERATE MUTASE
OverviewOverview
The high resolution crystal structure of Saccharomyces cerevisiae, phosphoglycerate mutase has been determined. This structure shows, important differences from the lower resolution structure deposited in, 1982. The crystal used to determine the new structure was of a different, form, having spacegroup P2(1). The model was refined to a crystallographic, R-factor of 18.9% and a free R-factor of 28.4% using all data between 25, and 2.3 A and employing a bulk solvent correction. The enzyme is a, tetramer of identical, 246 amino acid subunits, whose structure is, revealed to be a dimer of dimers, with four independent active sites, located well away from the subunit contacts. Each subunit contains two, domains, the larger with a typical nucleotide binding fold, although, phosphoglycerate mutase has no physiological requirement to bind, nucleotides. The catalytic-site histidine residues are no longer in a, "clapping-hands" conformation, but more resemble the conformation seen in, the distantly related enzymes prostatic acid phosphatase and, fructose-2,6-bisphosphatase. However, the catalytic histidine residues in, the mutase are found to be much closer to each other than in the, phosphatase structures, perhaps due to the absence of bound ligands in the, mutase crystal. An intricate web of H-bonds is found around the catalytic, histidine residues, high-lighting residues probably important for, maintaining their correct orientation and charge. The positions of certain, other residues, including some found near the catalytic site and some, lining the catalytic-site cleft, have been changed by the correction of, registration errors between sequence and electron density in the original, structure. Electron density was apparent for a portion of the functionally, important C-terminal tail, which was absent from the earlier structure, showing it to adopt a mainly helical conformation.
About this StructureAbout this Structure
4PGM is a Single protein structure of sequence from Saccharomyces cerevisiae. Active as Phosphoglycerate mutase, with EC number 5.4.2.1 Known structural/functional Site: . Full crystallographic information is available from OCA.
ReferenceReference
The 2.3 A X-ray crystal structure of S. cerevisiae phosphoglycerate mutase., Rigden DJ, Alexeev D, Phillips SE, Fothergill-Gilmore LA, J Mol Biol. 1998 Feb 20;276(2):449-59. PMID:9512715
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