View source for 3hb3


==High resolution crystal structure of Paracoccus denitrificans cytochrome c oxidase==
<StructureSection load='3hb3' size='340' side='right'caption='[[3hb3]], [[Resolution|resolution]] 2.25&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3hb3]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus] and [https://en.wikipedia.org/wiki/Paracoccus_denitrificans Paracoccus denitrificans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3HB3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3HB3 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]] 2.25&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CU1:COPPER+(I)+ION'>CU1</scene>, <scene name='pdbligand=HEA:HEME-A'>HEA</scene>, <scene name='pdbligand=LDA:LAURYL+DIMETHYLAMINE-N-OXIDE'>LDA</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PEO:HYDROGEN+PEROXIDE'>PEO</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=3hb3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hb3 OCA], [https://pdbe.org/3hb3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3hb3 RCSB], [https://www.ebi.ac.uk/pdbsum/3hb3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3hb3 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/HVM54_MOUSE HVM54_MOUSE] 
== 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/hb/3hb3_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=3hb3 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The structure of the two-subunit cytochrome c oxidase from Paracoccus denitrificans has been refined using X-ray cryodata to 2.25 A resolution in order to gain further insights into its mechanism of action. The refined structural model shows a number of new features including many additional solvent and detergent molecules. The electron density bridging the heme a(3) iron and Cu(B) of the active site is fitted best by a peroxo-group or a chloride ion. Two waters or OH(-) groups do not fit, one water (or OH(-)) does not provide sufficient electron density. The analysis of crystals of cytochrome c oxidase isolated in the presence of bromide instead of chloride appears to exclude chloride as the bridging ligand. In the D-pathway a hydrogen bonded chain of six water molecules connects Asn131 and Glu278, but the access for protons to this water chain is blocked by Asn113, Asn131 and Asn199. The K-pathway contains two firmly bound water molecules, an additional water chain seems to form its entrance. Above the hemes a cluster of 13 water molecules is observed which potentially form multiple exit pathways for pumped protons. The hydrogen bond pattern excludes that the Cu(B) ligand His326 is present in the imidazolate form.

High resolution crystal structure of Paracoccus denitrificans cytochrome c oxidase: new insights into the active site and the proton transfer pathways.,Koepke J, Olkhova E, Angerer H, Muller H, Peng G, Michel H Biochim Biophys Acta. 2009 Jun;1787(6):635-45. Epub 2009 Apr 15. PMID:19374884<ref>PMID:19374884</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3hb3" style="background-color:#fffaf0;"></div>

==See Also==
*[[Antibody 3D structures|Antibody 3D structures]]
*[[Cytochrome c oxidase 3D structures|Cytochrome c oxidase 3D structures]]
*[[3D structures of non-human antibody|3D structures of non-human antibody]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Paracoccus denitrificans]]
[[Category: Angerer H]]
[[Category: Koepke J]]
[[Category: Peng G]]