1y4h: Difference between revisions
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|PDB= 1y4h |SIZE=350|CAPTION= <scene name='initialview01'>1y4h</scene>, resolution 1.93Å | |PDB= 1y4h |SIZE=350|CAPTION= <scene name='initialview01'>1y4h</scene>, resolution 1.93Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene> | |LIGAND= <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= sspB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1280 Staphylococcus aureus]), sspC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1280 Staphylococcus aureus]) | |GENE= sspB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1280 Staphylococcus aureus]), sspC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1280 Staphylococcus aureus]) | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1pxv|1PXV]], [[1nyc|1NYC]], [[1x9y|1X9Y]], [[1cv8|1CV8]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1y4h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y4h OCA], [http://www.ebi.ac.uk/pdbsum/1y4h PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1y4h RCSB]</span> | |||
}} | }} | ||
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[[Category: Filipek, R.]] | [[Category: Filipek, R.]] | ||
[[Category: Potempa, J.]] | [[Category: Potempa, J.]] | ||
[[Category: cysteine protease]] | [[Category: cysteine protease]] | ||
[[Category: inhibitor]] | [[Category: inhibitor]] | ||
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[[Category: staphostatin b]] | [[Category: staphostatin b]] | ||
''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 00:58:38 2008'' | ||
Revision as of 21:58, 30 March 2008
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| 1y4h, resolution 1.93Å | |||||||||||||
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| Ligands: | CL, SO4 | ||||||||||||
| Gene: | sspB (Staphylococcus aureus), sspC (Staphylococcus aureus) | ||||||||||||
| Related: | 1PXV, 1NYC, 1X9Y, 1CV8
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
Wild type staphopain-staphostatin complex
Overview
Staphostatins are the endogenous, highly specific inhibitors of staphopains, the major secreted cysteine proteases from Staphylococcus aureus. We have previously shown that staphostatins A and B are competitive, active site-directed inhibitors that span the active site clefts of their target proteases in the same orientation as substrates. We now report the crystal structure of staphostatin B in complex with wild-type staphopain B at 1.9 A resolution. In the complex structure, the catalytic residues are found in exactly the positions that would be expected for uncomplexed papain-type proteases. There is robust, continuous density for the staphostatin B binding loop and no indication for cleavage of the peptide bond that comes closest to the active site cysteine of staphopain B. The carbonyl carbon atom C of this peptide bond is 4.1 A away from the active site cysteine sulfur Sgamma atom. The carbonyl oxygen atom O of this peptide bond points away from the putative oxyanion hole and lies almost on a line from the Sgamma atom to the C atom. The arrangement is strikingly similar to the "ionmolecule" arrangement for the complex of papain-type enzymes with their substrates but differs significantly from the arrangement conventionally assumed for the Michaelis complex of papain-type enzymes with their substrates and also from the arrangement that is crystallographically observed for complexes of standard mechanism inhibitors and their target serine proteases.
About this Structure
1Y4H is a Protein complex structure of sequences from Staphylococcus aureus. Full crystallographic information is available from OCA.
Reference
A comparison of staphostatin B with standard mechanism serine protease inhibitors., Filipek R, Potempa J, Bochtler M, J Biol Chem. 2005 Apr 15;280(15):14669-74. Epub 2005 Jan 11. PMID:15644332
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