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==CONFORMER SELECTION BY LIGAND BINDING OBSERVED WITH PROTEIN CRYSTALLOGRAPHY== | |||
<StructureSection load='1ccj' size='340' side='right'caption='[[1ccj]], [[Resolution|resolution]] 2.10Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1ccj]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CCJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CCJ FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ccj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ccj OCA], [https://pdbe.org/1ccj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ccj RCSB], [https://www.ebi.ac.uk/pdbsum/1ccj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ccj ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/CCPR_YEAST CCPR_YEAST] Destroys radicals which are normally produced within the cells and which are toxic to biological systems. | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/cc/1ccj_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</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/main_output.php?pdb_ID=1ccj ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
A large-scale movement between "closed" and "open" conformations of a protein loop was observed directly with protein crystallography by trapping individual conformers through binding of an exogenous ligand and characterization with solution kinetics. The buried indole ring of Trp191 in cytochrome c peroxidase (CCP) was displaced by exogenous ligands, causing a conformational change of loop Pro190-Asn195 and exposing Trp191 to the protein surface. Kinetic measurements are consistent with a two-step binding mechanism in which the rate-limiting step is a transition of the protein to the open state, which then binds the ligand. This large-scale conformational change of a functionally important region of CCP is independent of ligand and indicates that about 4% of the wild-type protein is in the open form in solution at any given time. | |||
Protein conformer selection by ligand binding observed with crystallography.,Cao Y, Musah RA, Wilcox SK, Goodin DB, McRee DE Protein Sci. 1998 Jan;7(1):72-8. PMID:9514261<ref>PMID:9514261</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1ccj" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Cytochrome c peroxidase|Cytochrome c peroxidase]] | *[[Cytochrome c peroxidase 3D structures|Cytochrome c peroxidase 3D structures]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
[[Category: | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Saccharomyces cerevisiae]] | [[Category: Saccharomyces cerevisiae]] | ||
[[Category: Cao | [[Category: Cao Y]] | ||
[[Category: Goodin | [[Category: Goodin DB]] | ||
[[Category: Mcree | [[Category: Mcree DE]] | ||
[[Category: Musah | [[Category: Musah RA]] | ||
[[Category: Wilcox | [[Category: Wilcox SK]] | ||
Latest revision as of 08:50, 9 August 2023
CONFORMER SELECTION BY LIGAND BINDING OBSERVED WITH PROTEIN CRYSTALLOGRAPHYCONFORMER SELECTION BY LIGAND BINDING OBSERVED WITH PROTEIN CRYSTALLOGRAPHY
Structural highlights
FunctionCCPR_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 PubMedA large-scale movement between "closed" and "open" conformations of a protein loop was observed directly with protein crystallography by trapping individual conformers through binding of an exogenous ligand and characterization with solution kinetics. The buried indole ring of Trp191 in cytochrome c peroxidase (CCP) was displaced by exogenous ligands, causing a conformational change of loop Pro190-Asn195 and exposing Trp191 to the protein surface. Kinetic measurements are consistent with a two-step binding mechanism in which the rate-limiting step is a transition of the protein to the open state, which then binds the ligand. This large-scale conformational change of a functionally important region of CCP is independent of ligand and indicates that about 4% of the wild-type protein is in the open form in solution at any given time. Protein conformer selection by ligand binding observed with crystallography.,Cao Y, Musah RA, Wilcox SK, Goodin DB, McRee DE Protein Sci. 1998 Jan;7(1):72-8. PMID:9514261[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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