View source for 3gxx


==Structure of the SH2 domain of the Candida glabrata transcription elongation factor Spt6, crystal form B==
<StructureSection load='3gxx' size='340' side='right'caption='[[3gxx]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3gxx]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Candida_glabrata Candida glabrata]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GXX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3GXX FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3gxx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3gxx OCA], [https://pdbe.org/3gxx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3gxx RCSB], [https://www.ebi.ac.uk/pdbsum/3gxx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3gxx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SPT6_CANGA SPT6_CANGA] Plays a role in maintenance of chromatin structure during RNA polymerase II transcription elongation thereby repressing transcription initiation from cryptic promoters. Mediates the reassembly of nucleosomes onto the promoters of at least a selected set of genes during repression; the nucleosome reassembly is essential for transcriptional repression (By similarity).
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gx/3gxx_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=3gxx ConSurf].
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== Publication Abstract from PubMed ==
During transcription elongation through chromatin, the Ser2-phosphorylated C-terminal repeat domain of RNA polymerase II binds the C-terminal Src homology 2 (SH2) domain of the nucleosome re-assembly factor Spt6. This SH2 domain is unusual in its specificity to bind phosphoserine, rather than phosphotyrosine and because it is the only SH2 domain in the yeast genome. Here, we report the high-resolution crystal structure of the SH2 domain from Candida glabrata Spt6. The structure combines features from both structural subfamilies of SH2 domains, suggesting it resembles a common ancestor of all SH2 domains. Two conserved surface pockets deviate from those of canonical SH2 domains, and may explain the unusual phosphoserine specificity. Differential gene expression analysis reveals that the SH2 domain is required for normal expression of a subset of yeast genes, and is consistent with multiple functions of Spt6 in chromatin transcription.

Structure and in vivo requirement of the yeast Spt6 SH2 domain.,Dengl S, Mayer A, Sun M, Cramer P J Mol Biol. 2009 May 29;389(1):211-25. Epub 2009 Apr 14. PMID:19371747<ref>PMID:19371747</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3gxx" style="background-color:#fffaf0;"></div>

==See Also==
*[[Elongation factor 3D structures|Elongation factor 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Cramer P]]
[[Category: Dengl S]]
[[Category: Mayer A]]
[[Category: Sun M]]