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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2afn]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Alcaligenes_faecalis Alcaligenes faecalis]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1afn 1afn]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AFN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2AFN FirstGlance]. <br>
<table><tr><td colspan='2'>[[2afn]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Alcaligenes_faecalis Alcaligenes faecalis]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1afn 1afn]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AFN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2AFN FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene></td></tr>
</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&#8491;</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Nitrite_reductase_(NO-forming) Nitrite reductase (NO-forming)], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.7.2.1 1.7.2.1] </span></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CU:COPPER+(II)+ION'>CU</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=2afn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2afn OCA], [https://pdbe.org/2afn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2afn RCSB], [https://www.ebi.ac.uk/pdbsum/2afn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2afn ProSAT]</span></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=2afn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2afn OCA], [https://pdbe.org/2afn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2afn RCSB], [https://www.ebi.ac.uk/pdbsum/2afn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2afn ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NIR_ALCFA NIR_ALCFA]
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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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=2afn ConSurf].
</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=2afn ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The structures at 2.0 and 2.25 A resolution of native and recombinant nitrite reductase from Alcaligenes faecalis show that they are identical to each other and very similar to nitrite reductase from Achromobacter cycloclastes. The crystallographic structure of a mutant, M150E, which unlike the wild-type protein cannot be reduced by pseudoazurin, shows that the glutamate replacement for methionine binds to a metal at the type I Cu site via only one oxygen. Anomalous scattering data collected at wavelengths of 1.040 and 1.377 A reveal that the metal at the type I site is a Zn. No significant differences from the native structure other than local perturbations at the type I site are seen. A local pseudo 2-fold axis relates the two domains of different monomers which form the active site. The two residues, Asp98 and His255, believed to be involved in catalysis are related by this 2-fold. An unusual (+)-(+) charge interaction between Lys269, Glu279, and His100 helps to orient the active site Cu ligand, His100. A number of negatively charged surface residues create an electrostatic field whose shape suggests that it may serve to direct incoming negatively charged nitrite as well as to dock the electron donor partner, pseudoazurin.
Structure of Alcaligenes faecalis nitrite reductase and a copper site mutant, M150E, that contains zinc.,Murphy ME, Turley S, Kukimoto M, Nishiyama M, Horinouchi S, Sasaki H, Tanokura M, Adman ET Biochemistry. 1995 Sep 26;34(38):12107-17. PMID:7547950<ref>PMID:7547950</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2afn" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Nitrite reductase 3D structures|Nitrite reductase 3D structures]]
*[[Nitrite reductase 3D structures|Nitrite reductase 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Alcaligenes faecalis]]
[[Category: Alcaligenes faecalis]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Adman, E T]]
[[Category: Adman ET]]
[[Category: Murphy, M E.P]]
[[Category: Murphy MEP]]
[[Category: Turley, S]]
[[Category: Turley S]]
[[Category: Copper]]
[[Category: Fad]]
[[Category: Flavoprotein]]
[[Category: Nitrite assimilation]]
[[Category: Oxidoreductase]]
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