View source for 3cro

==THE PHAGE 434 CRO/OR1 COMPLEX AT 2.5 ANGSTROMS RESOLUTION==
<StructureSection load='3cro' size='340' side='right' caption='[[3cro]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3cro]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Bp434 Bp434]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CRO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3CRO FirstGlance]. <br>
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3cro FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cro OCA], [http://pdbe.org/3cro PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3cro RCSB], [http://www.ebi.ac.uk/pdbsum/3cro PDBsum]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/RCRO_BP434 RCRO_BP434]] Cro represses genes normally expressed in early phage development and is necessary for the late stage of lytic growth. It does this by binding to the OL and OR operators regions normally used by the repressor protein for lysogenic maintenance. 
== 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/cr/3cro_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=3cro ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The crystal structure of phage 434 Cro protein in complex with a 20 base-pair DNA fragment has been determined to 2.5 A resolution. The DNA fragment contains the sequence of the OR1 operator site. The structure shows a bent conformation for the DNA, straighter at the center and more bent at the ends. The central base-pairs adopt conformations with significant deviations from coplanarity. The two molecules interact extensively along their common interface, both through hydrogen bonds and van der Waals interactions. The significance of these interactions for operator binding and recognition is discussed.

The phage 434 Cro/OR1 complex at 2.5 A resolution.,Mondragon A, Harrison SC J Mol Biol. 1991 May 20;219(2):321-34. PMID:2038059<ref>PMID:2038059</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 3cro" style="background-color:#fffaf0;"></div>

==See Also==
*[[Bacteriophage repressor|Bacteriophage repressor]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bp434]]
[[Category: Harrison, S C]]
[[Category: Mondragon, A]]
[[Category: Double helix]]
[[Category: Protein-dna complex]]
[[Category: Transcription-dna complex]]