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==SPECIFICITY OF LIGAND BINDING IN A BURIED POLAR CAVITY OF CYTOCHROME C PEROXIDASE== | ==SPECIFICITY OF LIGAND BINDING IN A BURIED POLAR CAVITY OF CYTOCHROME C PEROXIDASE== | ||
<StructureSection load='1aa4' size='340' side='right' caption='[[1aa4]], [[Resolution|resolution]] 2.10Å' scene=''> | <StructureSection load='1aa4' size='340' side='right' caption='[[1aa4]], [[Resolution|resolution]] 2.10Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1aa4]] is a 1 chain structure | <table><tr><td colspan='2'>[[1aa4]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AA4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1AA4 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cytochrome-c_peroxidase Cytochrome-c peroxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.11.1.5 1.11.1.5] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cytochrome-c_peroxidase Cytochrome-c peroxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.11.1.5 1.11.1.5] </span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1aa4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1aa4 OCA], [http://pdbe.org/1aa4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1aa4 RCSB], [http://www.ebi.ac.uk/pdbsum/1aa4 PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1aa4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1aa4 OCA], [http://pdbe.org/1aa4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1aa4 RCSB], [http://www.ebi.ac.uk/pdbsum/1aa4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1aa4 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/ | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1aa4 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
| Line 36: | Line 36: | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Cytochrome-c peroxidase]] | [[Category: Cytochrome-c peroxidase]] | ||
[[Category: Fitzgerald, M M]] | [[Category: Fitzgerald, M M]] | ||
Revision as of 12:20, 9 August 2017
SPECIFICITY OF LIGAND BINDING IN A BURIED POLAR CAVITY OF CYTOCHROME C PEROXIDASESPECIFICITY OF LIGAND BINDING IN A BURIED POLAR CAVITY OF CYTOCHROME C PEROXIDASE
Structural highlights
Function[CCPR_YEAST] Destroys radicals which are normally produced within the cells and which are toxic to biological systems. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedConformational changes that gate the access of substrates or ligands to an active site are important features of enzyme function. In this report, we describe an unusual example of a structural rearrangement near a buried artificial cavity in cytochrome c peroxidase that occurs on binding protonated benzimidazole. A hinged main-chain rotation at two residues (Pro 190 and Asn 195) results in a surface loop rearrangement that opens a large solvent-accessible channel for the entry of ligands to an otherwise inaccessible binding site. The trapping of this alternate conformational state provides a unique view of the extent to which protein dynamics can allow small molecule penetration into buried protein cavities. A ligand-gated, hinged loop rearrangement opens a channel to a buried artificial protein cavity.,Fitzgerald MM, Musah RA, McRee DE, Goodin DB Nat Struct Biol. 1996 Jul;3(7):626-31. PMID:8673607[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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