1m4z

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[[Image:1m4z.jpg|left|200px]]
 
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==Crystal structure of the N-terminal BAH domain of Orc1p==
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The line below this paragraph, containing "STRUCTURE_1m4z", creates the "Structure Box" on the page.
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<StructureSection load='1m4z' size='340' side='right'caption='[[1m4z]], [[Resolution|resolution]] 2.20&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'>[[1m4z]] 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=1M4Z OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M4Z FirstGlance]. <br>
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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]] 2.2&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>
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{{STRUCTURE_1m4z| PDB=1m4z | SCENE= }}
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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=1m4z FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m4z OCA], [https://pdbe.org/1m4z PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1m4z RCSB], [https://www.ebi.ac.uk/pdbsum/1m4z PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1m4z ProSAT]</span></td></tr>
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</table>
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'''Crystal structure of the N-terminal BAH domain of Orc1p'''
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== Function ==
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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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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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The N-terminal domain of the largest subunit of the Saccharomyces cerevisiae origin recognition complex (Orc1p) functions in transcriptional silencing and contains a bromo-adjacent homology (BAH) domain found in some chromatin-associated proteins including Sir3p. The 2.2 A crystal structure of the N-terminal domain of Orc1p revealed a BAH core and a non-conserved helical sub-domain. Mutational analyses demonstrated that the helical sub-domain was necessary and sufficient to bind Sir1p, and critical for targeting Sir1p primarily to the cis-acting E silencers at the HMR and HML silent chromatin domains. In the absence of the BAH domain, approximately 14-20% of cells in a population were silenced at the HML locus. Moreover, the distributions of the Sir2p, Sir3p and Sir4p proteins, while normal, were at levels lower than found in wild-type cells. Thus, in the absence of the Orc1p BAH domain, HML resembled silencing of genes adjacent to telomeres. These data are consistent with the view that the Orc1p-Sir1p interaction at the E silencers ensures stable inheritance of pre-established Sir2p, Sir3p and Sir4p complexes at the silent mating type loci.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/m4/1m4z_consurf.spt"</scriptWhenChecked>
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1M4Z is a [[Single protein]] structure of sequence 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=1M4Z OCA].
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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==Reference==
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</jmolCheckbox>
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Structure and function of the BAH-containing domain of Orc1p in epigenetic silencing., Zhang Z, Hayashi MK, Merkel O, Stillman B, Xu RM, EMBO J. 2002 Sep 2;21(17):4600-11. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12198162 12198162]
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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=1m4z ConSurf].
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<div style="clear:both"></div>
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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: Single protein]]
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[[Category: Hayashi MK]]
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[[Category: Hayashi, M K.]]
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[[Category: Merkel O]]
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[[Category: Merkel, O.]]
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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, R M.]]
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[[Category: Zhang Z]]
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[[Category: Zhang, Z.]]
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[[Category: Bah domain]]
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[[Category: Chromatin]]
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[[Category: Dna replication]]
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[[Category: Transcriptional silencing]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:38:14 2008''
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Current revision

Crystal structure of the N-terminal BAH domain of Orc1p

PDB ID 1m4z

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