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== | ==X-RAY STRUCTURE OF A BLUE COPPER NITRITE REDUCTASE AT HIGH PH AND IN COPPER FREE FORM AT 1.9 A RESOLUTION== | ||
Copper-containing nitrite reductases possess a trimeric structure where | <StructureSection load='1haw' size='340' side='right'caption='[[1haw]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1haw]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Achromobacter_xylosoxidans Achromobacter xylosoxidans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HAW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HAW 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]] 1.9Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CU1:COPPER+(I)+ION'>CU1</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=1haw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1haw OCA], [https://pdbe.org/1haw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1haw RCSB], [https://www.ebi.ac.uk/pdbsum/1haw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1haw ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/O68601_ALCXX O68601_ALCXX] | |||
== 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/ha/1haw_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=1haw ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Copper-containing nitrite reductases possess a trimeric structure where the catalytic Cu site, located at the monomer-monomer interface, resembles the catalytic sites of a number of Zn enzymes. Nitrite reductase from Alcaligenes xylosoxidans has optimum activity at pH 5.2 which decreases to a negligible level at pH 8. The structure of this nitrite reductase has previously been determined at pH 4.6. It has now been crystallized under new conditions at pH 8.5. Its crystallographic structure provides a structural explanation for the greatly reduced activity of the enzyme at high pH. Characterization of overexpressed protein in solution by EXAFS suggested that the protein lacked Cu in the catalytic type 2 Cu site and that the site was most probably occupied by Zn. Using the anomalous signals from Cu and Zn, the crystal structure revealed that the expressed protein was devoid of Cu in the catalytic site and that only a trace amount (<10%) of Zn was present at this site in the crystal. Despite the close structural similarity of the catalytic site to a number of Zn enzymes, these data suggest that Zn, if it binds at the catalytic copper site, binds weakly in nitrite reductase. | |||
X-ray structure of a blue copper nitrite reductase at high pH and in copper-free form at 1.9 A resolution.,Ellis MJ, Dodd FE, Strange RW, Prudencio M, Sawers G, Eady RR, Hasnain SS Acta Crystallogr D Biol Crystallogr. 2001 Aug;57(Pt 8):1110-8. Epub 2001, Jul 23. PMID:11468394<ref>PMID:11468394</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1haw" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Nitrite reductase 3D structures|Nitrite reductase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Achromobacter xylosoxidans]] | [[Category: Achromobacter xylosoxidans]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Dodd FE]] | |||
[[Category: Dodd | [[Category: Ellis MJ]] | ||
[[Category: Ellis | [[Category: Hasnain SS]] | ||
[[Category: Hasnain | [[Category: Prudencio M]] | ||
[[Category: Prudencio | [[Category: Sawerseady RR]] | ||
[[Category: Sawerseady | [[Category: Strange RW]] | ||
[[Category: Strange | |||