View source for 3drn


==The crystal structure of Bcp1 from Sulfolobus Sulfataricus==
<StructureSection load='3drn' size='340' side='right'caption='[[3drn]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3drn]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharolobus_solfataricus Saccharolobus solfataricus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3DRN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3DRN 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]] 2.15&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</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=3drn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3drn OCA], [https://pdbe.org/3drn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3drn RCSB], [https://www.ebi.ac.uk/pdbsum/3drn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3drn ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q97WP9_SACS2 Q97WP9_SACS2] 
== 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/dr/3drn_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=3drn ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Bcps constitute a group of antioxidant enzymes, belonging to the Prx family, that are widely distributed in bacteria, plants, and fungi. These proteins can contain two conserved cysteines within the CXXXXC motif. Recent studies demonstrated that though the role of the first cysteine is well defined, being the catalytic peroxidatic cysteine in all the members of this protein family, data on the function of the second cysteine are controversial and require further investigation. In this article, we report on the functional and structural characterization of Bcp1, an archaeal Bcp isolated from Sulfolobus solfataricus, which presents two conserved cysteine residues at positions 45 and 50. Functional studies revealed that this enzyme performs the catalytic reaction using an atypical 2-Cys mechanism, where Cys45 is the peroxidatic and Cys50 is the resolving cysteine. The X-ray structure of the double mutant C45S/C50S, representative of the fully reduced enzyme state, was determined at a resolution of 2.15 A, showing a Trx fold similar to that of other Prxs. Superposition with a structural homologue in the oxidized state provided, for the first time, a detailed description of the structural rearrangement necessary for a member of the Bcp family to perform the catalytic reaction. From this structural analysis, it emerges that a significant conformational change from a fully folded, to a locally unfolded form is required to form the intramolecular disulfide bond upon oxidation, according to the proposed reaction mechanism. Two residues, namely Arg53 and Asp54, which could play a role in this rearrangement, were also identified. Proteins 2009. (c) 2009 Wiley-Liss, Inc.

Insights into the catalytic mechanism of the Bcp family: Functional and structural analysis of Bcp1 from Sulfolobus solfataricus.,D'Ambrosio K, Limauro D, Pedone E, Galdi I, Pedone C, Bartolucci S, De Simone G Proteins. 2009 Feb 24. PMID:19338062<ref>PMID:19338062</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3drn" style="background-color:#fffaf0;"></div>

==See Also==
*[[Bacterioferritin comigratory protein|Bacterioferritin comigratory protein]]
*[[Peroxiredoxin 3D structures|Peroxiredoxin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharolobus solfataricus]]
[[Category: D'Ambrosio K]]
[[Category: De Simone G]]