1r5m

<table><tr><td colspan='2'>[[1r5m]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R5M OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1R5M FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SIF2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1r5m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r5m OCA], [http://pdbe.org/1r5m PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1r5m RCSB], [http://www.ebi.ac.uk/pdbsum/1r5m PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1r5m ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/SIF2_YEAST SIF2_YEAST]] Antagonizes telomeric silencing in yeast. May recruit SIR4 to non-telomeric sites or repression.

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== Publication Abstract from PubMed ==

In Saccharomyces cerevisiae, the SIF2 gene product is an integral component of the Set3 complex (SET3C), an assembly of proteins with some homology to the human SMRT and N-CoR corepressor complexes. SET3C has histone deacetylase activity that is responsible for repressing a set of meiotic genes. We have determined the X-ray crystal structure of a 46 kDa C-terminal domain of a SET3C core protein, Sif2p to 1.55 A resolution and a crystallographic R-factor of 19.0%. This domain contains an unusual eight-bladed beta-propeller structure, which differs from other transcriptional corepressor structures such as yeast Tup1p and human groucho (Gro)/TLE1, which have only seven. We have demonstrated intact Sif2p is a tetramer and the N-terminal LisH (Lis-homology)-containing domain mediates tetramerization and interaction with another component of SET3C, Snt1p. Multiple sequence alignments indicate that a surface on the "top" of the protein is conserved among species, suggesting that it may play a common role in binding partner proteins. Since Sif2p appears to be the yeast homolog of human TBL1 and TBLR1, which function in the N-CoR/SMRT complexes, its structural and oligomeric properties are likely to be very similar.

The structure of Sif2p, a WD repeat protein functioning in the SET3 corepressor complex.,Cerna D, Wilson DK J Mol Biol. 2005 Aug 26;351(4):923-35. PMID:16051270<ref>PMID:16051270</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Atcc 18824]]

[[Category: Cerna, D]]

[[Category: Wilson, D K]]

[[Category: Beta propeller]]

[[Category: Wd40 repeat]]