2csm: Difference between revisions
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[[Image:2csm.jpg|left|200px]] | [[Image:2csm.jpg|left|200px]] | ||
'''TYR-BOUND T-STATE OF YEAST CHORISMATE MUTASE''' | {{Structure | ||
|PDB= 2csm |SIZE=350|CAPTION= <scene name='initialview01'>2csm</scene>, resolution 2.8Å | |||
|SITE= <scene name='pdbsite=CAT:Presumed+Catalytic+Site'>CAT</scene> and <scene name='pdbsite=REG:Regulatory,+Allosteric+Site.+Only+Polar+Contacts+To+TYR+...'>REG</scene> | |||
|LIGAND= <scene name='pdbligand=TYR:TYROSINE'>TYR</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Chorismate_mutase Chorismate mutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.4.99.5 5.4.99.5] | |||
|GENE= | |||
}} | |||
'''TYR-BOUND T-STATE OF YEAST CHORISMATE MUTASE''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
2CSM is a [ | 2CSM is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CSM OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of the T state of allosteric yeast chorismate mutase and comparison with the R state., Strater N, Hakansson K, Schnappauf G, Braus G, Lipscomb WN, Proc Natl Acad Sci U S A. 1996 Apr 16;93(8):3330-4. PMID:[http:// | Crystal structure of the T state of allosteric yeast chorismate mutase and comparison with the R state., Strater N, Hakansson K, Schnappauf G, Braus G, Lipscomb WN, Proc Natl Acad Sci U S A. 1996 Apr 16;93(8):3330-4. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8622937 8622937] | ||
[[Category: Chorismate mutase]] | [[Category: Chorismate mutase]] | ||
[[Category: Saccharomyces cerevisiae]] | [[Category: Saccharomyces cerevisiae]] | ||
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[[Category: complex (isomerase/peptide)]] | [[Category: complex (isomerase/peptide)]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:19:25 2008'' | ||
Revision as of 17:19, 20 March 2008
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| , resolution 2.8Å | |||||||
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| Sites: | and | ||||||
| Ligands: | |||||||
| Activity: | Chorismate mutase, with EC number 5.4.99.5 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
TYR-BOUND T-STATE OF YEAST CHORISMATE MUTASE
OverviewOverview
The crystal structure of the tyrosine-bound T state of allosteric yeast Saccharomyces cerevisiae chorismate mutase was solved by molecular replacement at a resolution of 2.8 angstroms using a monomer of the R-state structure as the search model. The allosteric inhibitor tyrosine was found to bind in the T state at the same binding site as the allosteric activator tryptophan binds in the R state, thus defining one regulatory binding site for each monomer. Activation by tryptophan is caused by the larger steric size of its side chain, thereby pushing apart the allosteric domain of one monomer and helix H8 of the catalytic domain of the other monomer. Inhibition is caused by polar contacts of tyrosine with Arg-75 and Arg-76 of one monomer and with Gly-141, Ser-142, and Thr-145 of the other monomer, thereby bringing the allosteric and catalytic domains closer together. The allosteric transition includes an 8 degree rotation of each of the two catalytic domains relative to the allosteric domains of each monomer (domain closure). Alternatively, this transition can be described as a 15 degree rotation of the catalytic domains of the dimer relative to each other.
About this StructureAbout this Structure
2CSM is a Single protein structure of sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of the T state of allosteric yeast chorismate mutase and comparison with the R state., Strater N, Hakansson K, Schnappauf G, Braus G, Lipscomb WN, Proc Natl Acad Sci U S A. 1996 Apr 16;93(8):3330-4. PMID:8622937
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