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==DNA RECOGNITION BY BETA-SHEETS IN THE ARC REPRESSOR-OPERATOR CRYSTAL STRUCTURE==
==DNA RECOGNITION BY BETA-SHEETS IN THE ARC REPRESSOR-OPERATOR CRYSTAL STRUCTURE==
<StructureSection load='1par' size='340' side='right' caption='[[1par]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
<StructureSection load='1par' size='340' side='right'caption='[[1par]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1par]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Enterobacteria_phage_p22 Enterobacteria phage p22]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PAR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1PAR FirstGlance]. <br>
<table><tr><td colspan='2'>[[1par]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_virus_P22 Salmonella virus P22]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PAR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PAR FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1par FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1par OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1par RCSB], [http://www.ebi.ac.uk/pdbsum/1par PDBsum]</span></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6&#8491;</td></tr>
<table>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1par FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1par OCA], [https://pdbe.org/1par PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1par RCSB], [https://www.ebi.ac.uk/pdbsum/1par PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1par ProSAT]</span></td></tr>
<div style="background-color:#fffaf0;">
</table>
== Publication Abstract from PubMed ==
== Function ==
Transcription of the ant gene during lytic growth of bacteriophage P22 (ref. 1) is regulated by the cooperative binding of two Arc repressor dimers to a 21-base-pair operator site. Here we report the co-crystal structure of this Arc tetramer-operator complex at 2.6 A resolution. As expected from genetic and structural studies and from the co-crystal structure of the homologous Escherichia coli MetJ repressor, each Arc dimer uses an antiparallel beta-sheet to recognize bases in the major groove. However, the Arc and MetJ complexes differ in several important ways: the beta-sheet-DNA interactions of Arc are far less symmetrical; DNA binding by Arc is accompanied by important conformational changes in the beta-sheet; and Arc uses a different part of its protein surface for dimer-dimer interactions.
[https://www.uniprot.org/uniprot/RARC_BPP22 RARC_BPP22] This protein acts as a transcriptional repressor of its own gene arc and of gene ant.
 
DNA recognition by beta-sheets in the Arc repressor-operator crystal structure.,Raumann BE, Rould MA, Pabo CO, Sauer RT Nature. 1994 Feb 24;367(6465):754-7. PMID:8107872<ref>PMID:8107872</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Enterobacteria phage p22]]
[[Category: Large Structures]]
[[Category: Pabo, C O.]]
[[Category: Salmonella virus P22]]
[[Category: Raumann, B E.]]
[[Category: Pabo CO]]
[[Category: Rould, M A.]]
[[Category: Raumann BE]]
[[Category: Sauer, R T.]]
[[Category: Rould MA]]
[[Category: Double helix]]
[[Category: Sauer RT]]
[[Category: Protein-dna complex]]
[[Category: Transcription-dna complex]]
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