2wy4: Difference between revisions
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==STRUCTURE OF BACTERIAL GLOBIN FROM CAMPYLOBACTER JEJUNI AT 1.35 A RESOLUTION== | ==STRUCTURE OF BACTERIAL GLOBIN FROM CAMPYLOBACTER JEJUNI AT 1.35 A RESOLUTION== | ||
<StructureSection load='2wy4' size='340' side='right' caption='[[2wy4]], [[Resolution|resolution]] 1.35Å' scene=''> | <StructureSection load='2wy4' size='340' side='right' caption='[[2wy4]], [[Resolution|resolution]] 1.35Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2wy4]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[2wy4]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"campylobacter_fetus_subsp._jejuni"_smibert_1974 "campylobacter fetus subsp. jejuni" smibert 1974]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WY4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2WY4 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CYN:CYANIDE+ION'>CYN</scene>, <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=CYN:CYANIDE+ION'>CYN</scene>, <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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2wy4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wy4 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2wy4 RCSB], [http://www.ebi.ac.uk/pdbsum/2wy4 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=2wy4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wy4 OCA], [http://pdbe.org/2wy4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2wy4 RCSB], [http://www.ebi.ac.uk/pdbsum/2wy4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2wy4 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
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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=2wy4 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 2wy4" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Campylobacter jejuni]] | [[Category: Campylobacter fetus subsp. jejuni smibert 1974]] | ||
[[Category: Barynin, V V]] | [[Category: Barynin, V V]] | ||
[[Category: Poole, R K]] | [[Category: Poole, R K]] | ||
Revision as of 19:55, 11 August 2016
STRUCTURE OF BACTERIAL GLOBIN FROM CAMPYLOBACTER JEJUNI AT 1.35 A RESOLUTIONSTRUCTURE OF BACTERIAL GLOBIN FROM CAMPYLOBACTER JEJUNI AT 1.35 A RESOLUTION
Structural highlights
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 PubMedThe food-borne pathogen Campylobacter jejuni possesses a single-domain globin (Cgb) whose role in detoxifying nitric oxide has been unequivocally demonstrated through genetic and molecular approaches. The x-ray structure of cyanide-bound Cgb has been solved to a resolution of 1.35 A. The overall fold is a classic three-on-three alpha-helical globin fold, similar to that of myoglobin and Vgb from Vitreoscilla stercoraria. However, the D region (defined according to the standard globin fold nomenclature) of Cgb adopts a highly ordered alpha-helical conformation unlike any previously characterized members of this globin family, and the GlnE7 residue has an unexpected role in modulating the interaction between the ligand and the TyrB10 residue. The proximal hydrogen bonding network in Cgb demonstrates that the heme cofactor is ligated by an imidazolate, a characteristic of peroxidase-like proteins. Mutation of either proximal hydrogen-bonding residue (GluH23 or TyrG5) results in the loss of the high frequency nu(Fe-His) stretching mode (251 cm(-1)), indicating that both residues are important for maintaining the anionic character of the proximal histidine ligand. Cyanide binding kinetics for these proximal mutants demonstrate for the first time that proximal hydrogen bonding in globins can modulate ligand binding kinetics at the distal site. A low redox midpoint for the ferrous/ferric couple (-134 mV versus normal hydrogen electrode at pH 7) is consistent with the peroxidase-like character of the Cgb active site. These data provide a new insight into the mechanism via which Campylobacter may survive host-derived nitrosative stress. The single-domain globin from the pathogenic bacterium Campylobacter jejuni: novel D-helix conformation, proximal hydrogen bonding that influences ligand binding, and peroxidase-like redox properties.,Shepherd M, Barynin V, Lu C, Bernhardt PV, Wu G, Yeh SR, Egawa T, Sedelnikova SE, Rice DW, Wilson JL, Poole RK J Biol Chem. 2010 Apr 23;285(17):12747-54. Epub 2010 Feb 17. PMID:20164176[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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