4knu

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==Copper nitrite reductase from Nitrosomonas europaea at pH 6.5==
==Copper nitrite reductase from Nitrosomonas europaea at pH 6.5==
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<StructureSection load='4knu' size='340' side='right' caption='[[4knu]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
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<StructureSection load='4knu' size='340' side='right'caption='[[4knu]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4knu]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Nitrosomonas_europaea Nitrosomonas europaea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KNU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4KNU FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4knu]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Nitrosomonas_europaea_ATCC_19718 Nitrosomonas europaea ATCC 19718]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KNU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4KNU FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
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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]] 1.8&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4knt|4knt]], [[4kns|4kns]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
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<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=4knu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4knu OCA], [http://pdbe.org/4knu PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4knu RCSB], [http://www.ebi.ac.uk/pdbsum/4knu PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4knu ProSAT]</span></td></tr>
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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=4knu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4knu OCA], [https://pdbe.org/4knu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4knu RCSB], [https://www.ebi.ac.uk/pdbsum/4knu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4knu ProSAT]</span></td></tr>
</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/Q82VX5_NITEU Q82VX5_NITEU]
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Nitrifier denitrification is the conversion of nitrite to nitrous oxide by ammonia oxidizing organisms. This process, which is distinct from denitrification, is active under aerobic conditions in the model nitrifier Nitrosomonas europaea. The central enzyme of the nitrifier dentrification pathway is a copper nitrite reductase (CuNIR). To understand how a CuNIR, typically inactivated by oxygen, functions in this pathway, the enzyme isolated directly from N. europaea (NeNIR) was biochemically and structurally characterized. NeNIR reduces nitrite at a similar rate to other CuNIRs, but appears to be oxygen tolerant. Crystal structures of oxidized and reduced NeNIR reveal a substrate channel to the active site that is much more restricted than channels in typical CuNIRs. In addition, there is a second fully hydrated channel leading to the active site that likely acts a water exit pathway. The structure is minimally affected by changes in pH. Taken together, these findings provide insight into the molecular basis for NeNIR oxygen tolerance.
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Characterization of a Nitrite Reductase Involved in Nitrifier Denitrification.,Lawton TJ, Bowen KE, Sayavedra-Soto LA, Arp DJ, Rosenzweig AC J Biol Chem. 2013 Jul 15. PMID:23857587<ref>PMID:23857587</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 4knu" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Nitrosomonas europaea]]
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[[Category: Large Structures]]
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[[Category: Arp, D J]]
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[[Category: Nitrosomonas europaea ATCC 19718]]
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[[Category: Lawton, T L]]
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[[Category: Arp DJ]]
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[[Category: Rosenzweig, A C]]
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[[Category: Lawton TL]]
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[[Category: Sayavedra-Soto, L A]]
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[[Category: Rosenzweig AC]]
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[[Category: Nitrite reductase]]
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[[Category: Sayavedra-Soto LA]]
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[[Category: Oxidoreductase]]
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Current revision

Copper nitrite reductase from Nitrosomonas europaea at pH 6.5

PDB ID 4knu

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