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==TRIFLUOROETHANOL STABILIZES A HELIX-TURN-HELIX MOTIF IN EQUINE INFECTIOUS-ANEMIA-VIRUS TRANS-ACTIVATOR PROTEIN==
==TRIFLUOROETHANOL STABILIZES A HELIX-TURN-HELIX MOTIF IN EQUINE INFECTIOUS-ANEMIA-VIRUS TRANS-ACTIVATOR PROTEIN==
<StructureSection load='1tvs' size='340' side='right'caption='[[1tvs]], [[NMR_Ensembles_of_Models | 8 NMR models]]' scene=''>
<StructureSection load='1tvs' size='340' side='right'caption='[[1tvs]]' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1tvs]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Eiav Eiav]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TVS OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1TVS FirstGlance]. <br>
<table><tr><td colspan='2'>[[1tvs]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Equine_infectious_anemia_virus Equine infectious anemia virus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TVS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TVS FirstGlance]. <br>
</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">POTENTIAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=11665 EIAV])</td></tr>
</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'>[http://proteopedia.org/fgij/fg.htm?mol=1tvs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tvs OCA], [http://pdbe.org/1tvs PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1tvs RCSB], [http://www.ebi.ac.uk/pdbsum/1tvs PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1tvs ProSAT]</span></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=1tvs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tvs OCA], [https://pdbe.org/1tvs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tvs RCSB], [https://www.ebi.ac.uk/pdbsum/1tvs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tvs ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/O89467_9RETR O89467_9RETR]
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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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=1tvs ConSurf].
</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=1tvs ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The solution structure of the 75-amino-acid trans-activator (Tat) protein of the equine infectious-anemia virus in trifluoroethanol-containing solution was determined by two-dimensional and three-dimensional nuclear magnetic resonance spectroscopy, resulting in a total of 838 nuclear-Over-hauser-enhancement distance restraints, and restrained molecular-dynamics simulations. In contrast to the recently determined structure of this protein in trifluoroethanol-free pH 6.3 solution, the hydrophobic core and the adjacent basic RNA-binding region of the protein showed well-defined alpha-helical secondary structure in trifluoroethanol-containing solution. The helical regions comprise those parts of the molecule whose helix-forming tendencies were noted earlier in trifluoroethanol-free solution. Two helices (Gln38-Arg43 and Asp48-Ala64) are connected by a tight type-II turn centered at the strictly conserved Gly46 leading to a helix-turn-helix motif in the core and basic region of the protein. A third helix (Thr9-Asn13) is located in the less well defined N-terminal part of the protein. These observations may support the notion that the protein adopts a helical structure in the RNA-binding region on complex formation. Although the secondary-structure elements become better defined in trifluoroethanol-containing solution, the opposite is true for the hydrophobically stabilized tertiary structure. This adds a caveat to studies of protein structures in trifluoroethanol-containing solution in general.
Trifluoroethanol stabilizes a helix-turn-helix motif in equine infectious-anemia-virus trans-activator protein.,Sticht H, Willbold D, Ejchart A, Rosin-Arbesfeld R, Yaniv A, Gazit A, Rosch P Eur J Biochem. 1994 Nov 1;225(3):855-61. PMID:7957222<ref>PMID:7957222</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1tvs" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Tat protein|Tat protein]]
*[[Tat protein|Tat protein]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Eiav]]
[[Category: Equine infectious anemia virus]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Roesch, P]]
[[Category: Roesch P]]
[[Category: Sticht, H]]
[[Category: Sticht H]]
[[Category: Transcription regulation]]
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