View source for 1p3v


==Crystal Structures of the NO-and CO-Bound Heme Oxygenase From Neisseria Meningitidis: Implications for Oxygen Activation==
<StructureSection load='1p3v' size='340' side='right'caption='[[1p3v]], [[Resolution|resolution]] 2.25&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1p3v]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"diplokokkus_intracellularis_meningitidis"_(sic)_weichselbaum_1887 "diplokokkus intracellularis meningitidis" (sic) weichselbaum 1887]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1P3V OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1P3V FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CMO:CARBON+MONOXIDE'>CMO</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1oyk|1oyk]], [[1oyl|1oyl]], [[1oze|1oze]], [[1ozl|1ozl]], [[1ozr|1ozr]], [[1ozw|1ozw]], [[1p3t|1p3t]], [[1p3u|1p3u]]</div></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">hemO ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=487 "Diplokokkus intracellularis meningitidis" (sic) Weichselbaum 1887])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><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></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1p3v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1p3v OCA], [http://pdbe.org/1p3v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1p3v RCSB], [http://www.ebi.ac.uk/pdbsum/1p3v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1p3v ProSAT]</span></td></tr>
</table>
== 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/p3/1p3v_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=1p3v ConSurf].
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== Publication Abstract from PubMed ==
Heme oxygenases catalyze the oxidation of heme to biliverdin, carbon monoxide, and free iron while playing a critical role in mammalian heme homeostasis. Pathogenic bacteria such as Neisseriae meningitidis also produce heme oxygenase as part of a mechanism to mine host iron. The key step in heme oxidation is the regioselective oxidation of the heme alpha-meso-carbon by an activated Fe(III)-OOH complex. The structures of various diatomic ligands bound to the heme iron can mimic the dioxygen complex and provide important insights on the mechanism of O2 activation. Here we report the crystal structures of N. meningitidis heme oxygenase (nm-HO) in the Fe(II), Fe(II)-CO, and Fe(II)-NO states and compare these to the NO complex of human heme oxygenase-1 (Lad, L., Wang, J., Li, H., Friedman, J., Bhaskar, B., Ortiz de Montellano, P. R., and Poulos, T. L. (2003) J. Mol. Biol. 330, 527-538). Coordination of NO or CO results in a reorientation of Arg-77 that enables Arg-77 to participate in an active site H-bonded network involving a series of water molecules. One of these water molecules directly H-bonds to the Fe(II)-linked ligand and very likely serves as the proton source required for oxygen activation. Although the active site residues differ between nm-HO and human HO-1, the close similarity in the H-bonded water network suggests a common mechanism shared by all heme oxygenases.

Crystal structures of the NO- and CO-bound heme oxygenase from Neisseriae meningitidis. Implications for O2 activation.,Friedman J, Lad L, Deshmukh R, Li H, Wilks A, Poulos TL J Biol Chem. 2003 Sep 5;278(36):34654-9. Epub 2003 Jun 22. PMID:12819228<ref>PMID:12819228</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1p3v" style="background-color:#fffaf0;"></div>

==See Also==
*[[Heme oxygenase 3D structures|Heme oxygenase 3D structures]]
*[[User:Wayne Decatur/NASCE2011|User:Wayne Decatur/NASCE2011]]
*[[User:Wayne Decatur/UNH CME Workshop March 11 2011|User:Wayne Decatur/UNH CME Workshop March 11 2011]]
*[[User:Wayne Decatur/UNH Seminar Feb 1st 2011|User:Wayne Decatur/UNH Seminar Feb 1st 2011]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Heme oxygenase]]
[[Category: Large Structures]]
[[Category: Deshmukh, R]]
[[Category: Friedman, J]]
[[Category: Lad, L]]
[[Category: Li, H]]
[[Category: Poulos, T L]]
[[Category: Wilks, A]]
[[Category: Heme degradation]]
[[Category: Oxidoreductase]]