2qpp

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[[Image:2qpp.jpg|left|200px]]
 
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{{Structure
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==Crystal structure of human heme oxygenase-2 C127A (HO-2) with bound heme==
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|PDB= 2qpp |SIZE=350|CAPTION= <scene name='initialview01'>2qpp</scene>, resolution 2.610&Aring;
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<StructureSection load='2qpp' size='340' side='right'caption='[[2qpp]], [[Resolution|resolution]] 2.61&Aring;' scene=''>
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|SITE= <scene name='pdbsite=AC1:Hem+Binding+Site+For+Residue+A+300'>AC1</scene> and <scene name='pdbsite=AC2:Hem+Binding+Site+For+Residue+B+300'>AC2</scene>
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>
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<table><tr><td colspan='2'>[[2qpp]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QPP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2QPP FirstGlance]. <br>
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Heme_oxygenase Heme oxygenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.99.3 1.14.99.3] </span>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.61&#8491;</td></tr>
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|GENE= HMOX2, HO2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])
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<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>
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|DOMAIN=<span class='plainlinks'>[http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=cd00232 HemeO]</span>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2qpp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qpp OCA], [https://pdbe.org/2qpp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2qpp RCSB], [https://www.ebi.ac.uk/pdbsum/2qpp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2qpp ProSAT]</span></td></tr>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2qpp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qpp OCA], [http://www.ebi.ac.uk/pdbsum/2qpp PDBsum], [http://www.fli-leibniz.de/cgi-bin/ImgLib.pl?CODE=1kfv JenaLib], [http://www.rcsb.org/pdb/explore.do?structureId=2qpp RCSB]</span>
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</table>
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}}
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== Function ==
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[https://www.uniprot.org/uniprot/HMOX2_HUMAN HMOX2_HUMAN] Heme oxygenase cleaves the heme ring at the alpha methene bridge to form biliverdin. Biliverdin is subsequently converted to bilirubin by biliverdin reductase. Under physiological conditions, the activity of heme oxygenase is highest in the spleen, where senescent erythrocytes are sequestrated and destroyed. Heme oxygenase 2 could be implicated in the production of carbon monoxide in brain where it could act as a neurotransmitter.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/qp/2qpp_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=2qpp ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Heme oxygenase (HO) catalyzes the first step in the heme degradation pathway. The crystal structures of apo- and heme-bound truncated human HO-2 reveal a primarily alpha-helical architecture similar to that of human HO-1 and other known HOs. Proper orientation of heme in HO-2 is required for the regioselective oxidation of the alpha-mesocarbon. This is accomplished by interactions within the heme binding pocket, which is made up of two helices. The iron coordinating residue, His(45), resides on the proximal helix. The distal helix contains highly conserved glycine residues that allow the helix to flex and interact with the bound heme. Tyr(154), Lys(199), and Arg(203) orient the heme through direct interactions with the heme propionates. The rearrangements of side chains in heme-bound HO-2 compared with apoHO-2 further elucidate HO-2 heme interactions.
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'''Crystal structure of human heme oxygenase-2 C127A (HO-2) with bound heme'''
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Comparison of apo- and heme-bound crystal structures of a truncated human heme oxygenase-2.,Bianchetti CM, Yi L, Ragsdale SW, Phillips GN Jr J Biol Chem. 2007 Dec 28;282(52):37624-31. Epub 2007 Oct 26. PMID:17965015<ref>PMID:17965015</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 2qpp" style="background-color:#fffaf0;"></div>
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==Overview==
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==See Also==
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Heme oxygenase (HO) catalyzes the first step in the heme degradation pathway. The crystal structures of apo- and heme-bound truncated human HO-2 reveal a primarily alpha-helical architecture similar to that of human HO-1 and other known HOs. Proper orientation of heme in HO-2 is required for the regioselective oxidation of the alpha-mesocarbon. This is accomplished by interactions within the heme binding pocket, which is made up of two helices. The iron coordinating residue, His(45), resides on the proximal helix. The distal helix contains highly conserved glycine residues that allow the helix to flex and interact with the bound heme. Tyr(154), Lys(199), and Arg(203) orient the heme through direct interactions with the heme propionates. The rearrangements of side chains in heme-bound HO-2 compared with apoHO-2 further elucidate HO-2 heme interactions.
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*[[Heme oxygenase 3D structures|Heme oxygenase 3D structures]]
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== References ==
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==About this Structure==
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<references/>
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2QPP is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QPP OCA].
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__TOC__
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</StructureSection>
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==Reference==
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Comparison of apo- and heme-bound crystal structures of a truncated human heme oxygenase-2., Bianchetti CM, Yi L, Ragsdale SW, Phillips GN Jr, J Biol Chem. 2007 Dec 28;282(52):37624-31. Epub 2007 Oct 26. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17965015 17965015]
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[[Category: Heme oxygenase]]
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Bianchetti, C M.]]
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[[Category: Bianchetti CM]]
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[[Category: Bingman, C A.]]
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[[Category: Bingman CA]]
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[[Category: Bitto, E.]]
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[[Category: Bitto E]]
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[[Category: CESG, Center for Eukaryotic Structural Genomics.]]
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[[Category: Phillips Jr GN]]
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[[Category: Jr., G N.Phillips.]]
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[[Category: Wesenberg GE]]
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[[Category: Wesenberg, G E.]]
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[[Category: center for eukaryotic structural genomic]]
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[[Category: cesg]]
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[[Category: endoplasmic reticulum]]
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[[Category: heme oxygenase]]
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[[Category: ho-2]]
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[[Category: iron]]
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[[Category: metal-binding]]
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[[Category: microsome]]
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[[Category: oxidoreductase]]
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[[Category: polymorphism]]
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[[Category: protein structure initiative]]
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[[Category: psi]]
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[[Category: structural genomics community request]]
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[[Category: structural genomics medical relevance]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Mar 26 06:43:39 2008''
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Current revision

Crystal structure of human heme oxygenase-2 C127A (HO-2) with bound heme

PDB ID 2qpp

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