View source for 1pou


==THE SOLUTION STRUCTURE OF THE OCT-1 POU-SPECIFIC DOMAIN REVEALS A STRIKING SIMILARITY TO THE BACTERIOPHAGE LAMBDA REPRESSOR DNA-BINDING DOMAIN==
<StructureSection load='1pou' size='340' side='right'caption='[[1pou]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1pou]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1POU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1POU FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1pou FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pou OCA], [https://pdbe.org/1pou PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pou RCSB], [https://www.ebi.ac.uk/pdbsum/1pou PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pou ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PO2F1_HUMAN PO2F1_HUMAN] Transcription factor that binds to the octamer motif (5'-ATTTGCAT-3') and activates the promoters of the genes for some small nuclear RNAs (snRNA) and of genes such as those for histone H2B and immunoglobulins. Modulates transcription transactivation by NR3C1, AR and PGR (By similarity). In case of human herpes simplex virus (HSV) infection, POU2F1 forms a multiprotein-DNA complex with the viral transactivator protein VP16 and HCFC1 thereby enabling the transcription of the viral immediate early genes.<ref>PMID:1684878</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
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    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/po/1pou_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=1pou ConSurf].
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== Publication Abstract from PubMed ==
The POU-specific (POUs) domain, in association with a POU-type homeodomain, forms the bipartite DNA-binding POU domain. The solution structure of the Oct-1 POUs domain has been determined by multidimensional nuclear magnetic resonance spectroscopy and consists of four alpha helices surrounding a conserved hydrophobic core. The POUs domain is structurally similar to the DNA-binding domains of the bacteriophage lambda and 434 repressors and 434 Cro. These domains exhibit superimposable helix-turn-helix (HTH) motifs, except that in the POUs domain, the first helix and the linker to the second helix of the motif are extended. The conserved structural features have been used to propose a plausible model for DNA binding by the POUs domain. A human dwarfism mutation that affects positive control in the related POU domain protein Pit-1 maps to the same region of the HTH motif as do positive control mutations in lambda repressor.

The solution structure of the Oct-1 POU-specific domain reveals a striking similarity to the bacteriophage lambda repressor DNA-binding domain.,Assa-Munt N, Mortishire-Smith RJ, Aurora R, Herr W, Wright PE Cell. 1993 Apr 9;73(1):193-205. PMID:8462099<ref>PMID:8462099</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Assa-Munt N]]
[[Category: Aurora R]]
[[Category: Herr W]]
[[Category: Mortishire-Smith RJ]]
[[Category: Wright PE]]