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1zbx

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[[Image:1zbx.gif|left|200px]]
 
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==Crystal structure of a Orc1p-Sir1p complex==
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The line below this paragraph, containing "STRUCTURE_1zbx", creates the "Structure Box" on the page.
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<StructureSection load='1zbx' size='340' side='right'caption='[[1zbx]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1zbx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZBX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ZBX FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1zbx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zbx OCA], [https://pdbe.org/1zbx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1zbx RCSB], [https://www.ebi.ac.uk/pdbsum/1zbx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1zbx ProSAT]</span></td></tr>
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{{STRUCTURE_1zbx| PDB=1zbx | SCENE= }}
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</table>
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== Function ==
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'''Crystal structure of a Orc1p-Sir1p complex'''
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[https://www.uniprot.org/uniprot/ORC1_YEAST ORC1_YEAST] Component of the origin recognition complex (ORC) that binds origins of replication. It has a role in both chromosomal replication and mating type transcriptional silencing. Binds to the ARS consensus sequence (ACS) of origins of replication.<ref>PMID:17825064</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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==Overview==
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Check<jmol>
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The interaction between silence information regulator 1 protein (Sir1p) and origin recognition complex 1 protein (Orc1p), the largest subunit of the origin recognition complex, plays an important role in the establishment of transcriptional silencing at the cryptic mating-type gene loci in Saccharomyces cerevisiae. Sir1p binds the N-terminal region of Orc1p encompassing a Bromo-adjacent homology (BAH) domain found in various chromatin-associated proteins. To understand the molecular mechanism of Sir protein recruitment, we have determined a 2.5-A cocrystal structure of the N-terminal domain of Orc1p in complex with the Orc1p-interacting domain of Sir1p. The structure reveals that Sir1p Orc1p-interacting domain has a bilobal structure: an alpha/beta N-terminal lobe and a C-terminal lobe resembling the Tudor domain royal family fold. The N-terminal lobe of Sir1p binds in a shallow groove between a helical subdomain and the BAH domain of Orc1p. The structure provides a mechanistic understanding of Orc1p-Sir1p interaction specificity, as well as insights into protein-protein interactions involving BAH domains in general.
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zb/1zbx_consurf.spt"</scriptWhenChecked>
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==About this Structure==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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1ZBX is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZBX OCA].
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==Reference==
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</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=1zbx ConSurf].
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Structural basis for origin recognition complex 1 protein-silence information regulator 1 protein interaction in epigenetic silencing., Hsu HC, Stillman B, Xu RM, Proc Natl Acad Sci U S A. 2005 Jun 14;102(24):8519-24. Epub 2005 Jun 3. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15937111 15937111]
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<div style="clear:both"></div>
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[[Category: Protein complex]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Saccharomyces cerevisiae]]
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[[Category: Hsu, H C.]]
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[[Category: Hsu HC]]
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[[Category: Stillman, B.]]
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[[Category: Stillman B]]
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[[Category: Xu, R M.]]
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[[Category: Xu RM]]
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[[Category: Epigenetic]]
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[[Category: Protein-protein interaction]]
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[[Category: Silencing]]
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[[Category: Silent information regulator]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:26:20 2008''
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Current revision

Crystal structure of a Orc1p-Sir1p complex

PDB ID 1zbx

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