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[[Image:1e9o.gif|left|200px]]<br />
<applet load="1e9o" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1e9o, resolution 1.85&Aring;" />
'''CRYSTAL STRUCTURE OF BOVINE SOD-1 OF 3'''<br />


==Overview==
==Crystal structure of bovine SOD - 1 of 3==
The structure of the catalytic site in one subunit of bovine CuZn, superoxide dismutase is shown to be highly variable. A series of crystal, structures at approximately 1.7 A have been determined using data, collected from different crystals. Several conformations are observed for, the copper site from one of the subunits. These conformations lie between, those expected for the Cu(II) and Cu(I) forms of the enzyme and may, represent a slow positional rearrangement of the Cu site during the, crystallisation process due to the presence of a trace reductant in the, mother liquor. These states perhaps indicate some functionally relevant, structural steps that ultimately result in the breakage of the imidazolate, bridge between the two metal sites.This behaviour is not observed for the, second subunit of the dimeric enzyme, which remains in the, five-coordinate, distorted square planar geometry in all cases. We suggest, that this asymmetric behaviour may be caused by the lack of mobility for, the Glu119-Leu142 loop region in the second subunit caused by crystal, contacts. This region forms one wall of the active-site cavity, and its, mobility has been suggested, via molecular dynamics studies, to be, important for the catalytic mechanism.
<StructureSection load='1e9o' size='340' side='right'caption='[[1e9o]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1e9o]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E9O OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1E9O 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]] 1.85&#8491;</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=1e9o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1e9o OCA], [https://pdbe.org/1e9o PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1e9o RCSB], [https://www.ebi.ac.uk/pdbsum/1e9o PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1e9o ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SODC_BOVIN SODC_BOVIN] Destroys radicals which are normally produced within the cells and which are toxic to biological systems.
== 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/e9/1e9o_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1e9o ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The structure of the catalytic site in one subunit of bovine CuZn superoxide dismutase is shown to be highly variable. A series of crystal structures at approximately 1.7 A have been determined using data collected from different crystals. Several conformations are observed for the copper site from one of the subunits. These conformations lie between those expected for the Cu(II) and Cu(I) forms of the enzyme and may represent a slow positional rearrangement of the Cu site during the crystallisation process due to the presence of a trace reductant in the mother liquor. These states perhaps indicate some functionally relevant structural steps that ultimately result in the breakage of the imidazolate bridge between the two metal sites.This behaviour is not observed for the second subunit of the dimeric enzyme, which remains in the five-coordinate, distorted square planar geometry in all cases. We suggest that this asymmetric behaviour may be caused by the lack of mobility for the Glu119-Leu142 loop region in the second subunit caused by crystal contacts. This region forms one wall of the active-site cavity, and its mobility has been suggested, via molecular dynamics studies, to be important for the catalytic mechanism.


==About this Structure==
Conformational variability of the Cu site in one subunit of bovine CuZn superoxide dismutase: the importance of mobility in the Glu119-Leu142 loop region for catalytic function.,Hough MA, Strange RW, Hasnain SS J Mol Biol. 2000 Nov 24;304(2):231-41. PMID:11080458<ref>PMID:11080458</ref>
1E9O is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] with CU as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Superoxide_dismutase Superoxide dismutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.15.1.1 1.15.1.1] Structure known Active Sites: AC4, CU1, CU2 and CU3. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1E9O OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
Conformational variability of the Cu site in one subunit of bovine CuZn superoxide dismutase: the importance of mobility in the Glu119-Leu142 loop region for catalytic function., Hough MA, Strange RW, Hasnain SS, J Mol Biol. 2000 Nov 24;304(2):231-41. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11080458 11080458]
</div>
<div class="pdbe-citations 1e9o" style="background-color:#fffaf0;"></div>
 
==See Also==
*[[Superoxide dismutase 3D structures|Superoxide dismutase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bos taurus]]
[[Category: Bos taurus]]
[[Category: Protein complex]]
[[Category: Large Structures]]
[[Category: Superoxide dismutase]]
[[Category: Hough MA]]
[[Category: Hasnain, S.S.]]
[[Category: Samar Hasnain S]]
[[Category: Hough, M.A.]]
[[Category: CU]]
[[Category: asymmetry]]
[[Category: enzyme]]
[[Category: sod]]
[[Category: superoxide]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov  5 13:32:15 2007''
Retrieved from "https://proteopedia.org/1e9o"