4wbc
From Proteopedia
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|PDB= 4wbc |SIZE=350|CAPTION= <scene name='initialview01'>4wbc</scene>, resolution 2.138Å | |PDB= 4wbc |SIZE=350|CAPTION= <scene name='initialview01'>4wbc</scene>, resolution 2.138Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=SO4:SULFATE ION'>SO4</scene> | + | |LIGAND= <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4wbc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wbc OCA], [http://www.ebi.ac.uk/pdbsum/4wbc PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=4wbc RCSB]</span> | ||
}} | }} | ||
| Line 26: | Line 29: | ||
[[Category: Ravichandran, S.]] | [[Category: Ravichandran, S.]] | ||
[[Category: Sen, U.]] | [[Category: Sen, U.]] | ||
| - | [[Category: SO4]] | ||
[[Category: serine protease inhibitor]] | [[Category: serine protease inhibitor]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 05:40:38 2008'' |
Revision as of 02:40, 31 March 2008
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| , resolution 2.138Å | |||||||
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| Ligands: | |||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
2.13 A STRUCTURE OF A KUNITZ-TYPE WINGED BEAN CHYMOTRYPSIN INHIBITOR PROTEIN
Overview
The crystal structure of a Kunitz-type double-headed alpha--chymotrypsin inhibitor from winged bean seeds has been refined at 2.13 A resolution using data collected from cryo-cooled (90 K) crystals which belong to the hexagonal space group P6(1)22 with unit-cell parameters a = b = 60.84, c = 207.91 A. The volume of the unit cell is reduced by 5.3% on cooling. The refinement converged to an R value of 20.0% (R(free) = 25.8%) for 11100 unique reflections and the model shows good stereochemistry, with r.m.s. deviations from ideal values for bond lengths and bond angles of 0.011 A and 1.4 degrees, respectively. The structural architecture of the protein consists of 12 antiparallel beta-strands joined in the form of a characteristic beta-trefoil fold, with the two reactive-site regions, Asn38-Leu43 and Gln63-Phe68, situated on two external loops. Although the overall protein fold is the same as that of the room-temperature model, some conformational changes are observed in the loop regions and in the side chains of a few surface residues. A total of 176 ordered water molecules and five sulfate ions are included in the model.
About this Structure
4WBC is a Single protein structure of sequence from Psophocarpus tetragonolobus. This structure supersedes the now removed PDB entry 3WBC. Full crystallographic information is available from OCA.
Reference
Cryocrystallography of a Kunitz-type serine protease inhibitor: the 90 K structure of winged bean chymotrypsin inhibitor (WCI) at 2.13 A resolution., Ravichandran S, Sen U, Chakrabarti C, Dattagupta JK, Acta Crystallogr D Biol Crystallogr. 1999 Nov;55(Pt 11):1814-21. PMID:10531477
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