1e58: Difference between revisions
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==Overview== | ==Overview== | ||
The active conformation of the dimeric cofactor-dependent phosphoglycerate, mutase (dPGM) from Escherichia coli has been elucidated by, crystallographic methods to a resolution of 1.25 A (R-factor 0.121; R-free, 0.168). The active site residue His(10), central in the catalytic, mechanism of dPGM, is present as a phosphohistidine with occupancy of, 0.28. The structural changes on histidine phosphorylation highlight, various features that are significant in the catalytic mechanism. The, C-terminal 10-residue tail, which is not observed in previous dPGM, structures, is well ordered and interacts with residues implicated in, substrate binding; the displacement of a loop adjacent to the active, histidine brings previously overlooked residues into positions where they, may directly influence ... | The active conformation of the dimeric cofactor-dependent phosphoglycerate, mutase (dPGM) from Escherichia coli has been elucidated by, crystallographic methods to a resolution of 1.25 A (R-factor 0.121; R-free, 0.168). The active site residue His(10), central in the catalytic, mechanism of dPGM, is present as a phosphohistidine with occupancy of, 0.28. The structural changes on histidine phosphorylation highlight, various features that are significant in the catalytic mechanism. The, C-terminal 10-residue tail, which is not observed in previous dPGM, structures, is well ordered and interacts with residues implicated in, substrate binding; the displacement of a loop adjacent to the active, histidine brings previously overlooked residues into positions where they, may directly influence catalysis. E. coli dPGM, like the mammalian dPGMs, is a dimer, whereas previous structural work has concentrated on monomeric, and tetrameric yeast forms. We can now analyze the sequence differences, that cause this variation of quaternary structure. | ||
==About this Structure== | ==About this Structure== | ||
1E58 is a | 1E58 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with SO4 and CL as [http://en.wikipedia.org/wiki/ligands ligands]. The following page contains interesting information on the relation of 1E58 with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb50_1.html The Glycolytic Enzymes]]. 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] Structure known Active Site: HIS. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1E58 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: phosphohistidine]] | [[Category: phosphohistidine]] | ||
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Revision as of 13:44, 5 November 2007
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E.COLI COFACTOR-DEPENDENT PHOSPHOGLYCERATE MUTASE
OverviewOverview
The active conformation of the dimeric cofactor-dependent phosphoglycerate, mutase (dPGM) from Escherichia coli has been elucidated by, crystallographic methods to a resolution of 1.25 A (R-factor 0.121; R-free, 0.168). The active site residue His(10), central in the catalytic, mechanism of dPGM, is present as a phosphohistidine with occupancy of, 0.28. The structural changes on histidine phosphorylation highlight, various features that are significant in the catalytic mechanism. The, C-terminal 10-residue tail, which is not observed in previous dPGM, structures, is well ordered and interacts with residues implicated in, substrate binding; the displacement of a loop adjacent to the active, histidine brings previously overlooked residues into positions where they, may directly influence catalysis. E. coli dPGM, like the mammalian dPGMs, is a dimer, whereas previous structural work has concentrated on monomeric, and tetrameric yeast forms. We can now analyze the sequence differences, that cause this variation of quaternary structure.
About this StructureAbout this Structure
1E58 is a Single protein structure of sequence from Escherichia coli with SO4 and CL as ligands. The following page contains interesting information on the relation of 1E58 with [The Glycolytic Enzymes]. Active as Phosphoglycerate mutase, with EC number 5.4.2.1 Structure known Active Site: HIS. Full crystallographic information is available from OCA.
ReferenceReference
High resolution structure of the phosphohistidine-activated form of Escherichia coli cofactor-dependent phosphoglycerate mutase., Bond CS, White MF, Hunter WN, J Biol Chem. 2001 Feb 2;276(5):3247-53. Epub 2000 Oct 18. PMID:11038361
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