View source for 1rzq


==Crystal Structure of C-Terminal Despentapeptide Nitrite Reductase from Achromobacter Cycloclastes at pH5.0==
<StructureSection load='1rzq' size='340' side='right'caption='[[1rzq]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1rzq]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Achromobacter_cycloclastes Achromobacter cycloclastes]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RZQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1RZQ 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]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=1rzq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rzq OCA], [https://pdbe.org/1rzq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1rzq RCSB], [https://www.ebi.ac.uk/pdbsum/1rzq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1rzq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NIR_ACHCY NIR_ACHCY] 
== 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/rz/1rzq_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=1rzq ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
Crystal structures of C-terminal despentapeptide nitrite reductase (NiRc-5) from Achromobacter cycloclastes were determined from 1.9 to 2.3A at pH 5.0, 5.4, and 6.2. NiRc-5, that has lost about 30% activity, is found to possess quite similar trimeric structures as the native enzyme. Electron density and copper content measurements indicate that the activity loss is not caused by the release of type 2 copper (T2Cu). pH-profile structural comparisons with native enzyme reveal that the T2Cu active center in NiRc-5 is perturbed, accounting for the partial loss of enzyme activity. This perturbation likely results from the less constrained conformations of two catalytic residues, Asp98 and His255. Hydrogen bonding analysis shows that the deletion of five residues causes a loss of more than half the intersubunit hydrogen bonds mediated by C-terminal tail. This study shows that the C-terminal tail plays an important role in controlling the conformations around the T2Cu site at the subunit interface, and helps keep the optimum microenvironment of active center for the full enzyme activity of AcNiR.

pH-profile crystal structure studies of C-terminal despentapeptide nitrite reductase from Achromobacter cycloclastes.,Li HT, Wang C, Chang T, Chang WC, Liu MY, Le Gall J, Gui LL, Zhang JP, An XM, Chang WR Biochem Biophys Res Commun. 2004 Mar 26;316(1):107-13. PMID:15003518<ref>PMID:15003518</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 1rzq" style="background-color:#fffaf0;"></div>

==See Also==
*[[Nitrite reductase 3D structures|Nitrite reductase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Achromobacter cycloclastes]]
[[Category: Large Structures]]
[[Category: An XM]]
[[Category: Chang T]]
[[Category: Chang WC]]
[[Category: Chang WR]]
[[Category: Gui LL]]
[[Category: Le Gall J]]
[[Category: Li HT]]
[[Category: Liu MY]]
[[Category: Wang C]]
[[Category: Zhang JP]]