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3owt

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{{STRUCTURE_3owt| PDB=3owt | SCENE= }}
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==Crystal structure of S. cerevisiae RAP1-Sir3 complex==
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===Crystal structure of S. cerevisiae RAP1-Sir3 complex===
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<StructureSection load='3owt' size='340' side='right' caption='[[3owt]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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{{ABSTRACT_PUBMED_21217703}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3owt]] is a 3 chain structure with 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=3OWT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3OWT FirstGlance]. <br>
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</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GRF1, N1310, RAP1, TUF1, YNL216W ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae]), CMT1, L9753.10, MAR2, SIR3, STE8, YLR442C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae])</td></tr>
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<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=3owt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3owt OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3owt RCSB], [http://www.ebi.ac.uk/pdbsum/3owt PDBsum]</span></td></tr>
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</table>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Repressor activator protein 1 (RAP1) is the most highly conserved telomere protein. It is involved in protecting chromosome ends in fission yeast and promoting gene silencing in Saccharomyces cerevisiae, whereas it represses homology-directed recombination at telomeres in mammals. To understand how RAP1 has such diverse functions at telomeres, we solved the crystal or solution structures of the RAP1 C-terminal (RCT) domains of RAP1 from multiple organisms in complex with their respective protein-binding partners. Our analysis establishes RAP1(RCT) as an evolutionarily conserved protein-protein interaction module. In mammalian and fission yeast cells, this module interacts with TRF2 and Taz1, respectively, targeting RAP1 to chromosome ends for telomere protection. In contrast, S. cerevisiae RAP1 uses its RCT domain to recruit Sir3 to telomeres to mediate gene silencing. Together, our results show that, depending on the organism, the evolutionarily conserved RAP1 RCT motif has diverse functional roles at telomeres.
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==Function==
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A conserved motif within RAP1 has diversified roles in telomere protection and regulation in different organisms.,Chen Y, Rai R, Zhou ZR, Kanoh J, Ribeyre C, Yang Y, Zheng H, Damay P, Wang F, Tsujii H, Hiraoka Y, Shore D, Hu HY, Chang S, Lei M Nat Struct Mol Biol. 2011 Jan 9. PMID:21217703<ref>PMID:21217703</ref>
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[[http://www.uniprot.org/uniprot/RAP1_YEAST RAP1_YEAST]] Essential regulatory protein in yeast whose DNA-binding sites are found at three types of chromosomal elements: promoters, silencers, and telomeres. RAP1 is also involved in the regulation of telomere structure, where its binding sites are found within the terminal poly[C(1-3)A] sequences. The opposite regulatory functions of RAP1 are not intrinsic to its binding sites but, instead, result from interactions with different factors at promoters and silencers. RAP1 associates with SIR3 and SIR4 proteins to form a DNA-binding complex that initiates the repression at the HM loci and telomeres. May also target the binding of RIF1 and RIF2 to silencers and telomeres. Forms with GCR1 a transcriptional activation complex that is required for expression of glycolytic and ribosomal gene. [[http://www.uniprot.org/uniprot/SIR3_YEAST SIR3_YEAST]] The proteins SIR1 through SIR4 are required for transcriptional repression of the silent mating type loci, HML and HMR. The proteins SIR2 through SIR4 repress mulitple loci by modulating chromatin structure. Involves the compaction of chromatin fiber into a more condensed form.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[3owt]] is a 3 chain structure with 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=3OWT OCA].
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</div>
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:021217703</ref><references group="xtra"/><references/>
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__TOC__
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</StructureSection>
[[Category: Saccharomyces cerevisiae]]
[[Category: Saccharomyces cerevisiae]]
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[[Category: Chen, Y.]]
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[[Category: Chen, Y]]
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[[Category: Lei, M.]]
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[[Category: Lei, M]]
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[[Category: Yang, Y.]]
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[[Category: Yang, Y]]
[[Category: Protein binding]]
[[Category: Protein binding]]
[[Category: Rct domain]]
[[Category: Rct domain]]

Revision as of 07:04, 19 December 2014

Crystal structure of S. cerevisiae RAP1-Sir3 complex

3owt, resolution 2.00Å

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