1y9x

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[[Image:1y9x.png|left|200px]]
 
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{{STRUCTURE_1y9x| PDB=1y9x | SCENE= }}
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==Solution structure of Archaeon DNA-binding protein ssh10b==
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<StructureSection load='1y9x' size='340' side='right'caption='[[1y9x]]' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1y9x]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharolobus_shibatae Saccharolobus shibatae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Y9X OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1Y9X FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1y9x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y9x OCA], [https://pdbe.org/1y9x PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1y9x RCSB], [https://www.ebi.ac.uk/pdbsum/1y9x PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1y9x ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ALBA1_SACSH ALBA1_SACSH] Binds double-stranded DNA tightly but without sequence specificity. It is distributed uniformly and abundantly on the chromosome, suggesting a role in chromatin architecture. May be involved in DNA compaction. Binds rRNA and mRNA in vivo. May play a role in maintaining the structural and functional stability of RNA, and, perhaps, ribosomes.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/y9/1y9x_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=1y9x ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The hyperthermophilic Ssh10b from Sulfolobus shibatae is a member of the Sac10b family, which has been postulated to play a role in chromosomal organization in Archaea. Ssh10b is capable of significantly constraining negative DNA supercoils at elevated temperatures. In this study, the solution structure of the dimeric P62A mutant Ssh10b ([P62A]Ssh10b) was determined by multidimensional NMR spectroscopy. The backbone 15N dynamics, H/D exchange with and without the denaturant GdmSCN, and chemical and thermal denaturation experiments were performed to investigate the molecular basis of high thermostability of [P62A]Ssh10b. Data analysis has revealed an alpha/beta-hydrophobic core consisting of two alpha-helices and one beta-sheet which are stabilized by cooperative hydrophobic and hydrogen-bonding interactions. This stabilizing alpha/beta-hydrophobic core of [P62A]Ssh10b exhibiting highly restricted internal motions is composed of residues having highly protected amide protons which exchange with solvent mostly by means of a global unfolding process. The K40N mutation greatly destabilizes the mutant [P62A]Ssh10b because this mutation disturbs the packing of alpha-helix against the beta-sheet reducing the stability of the alpha/beta-hydrophobic core in the mutant protein. In comparison with homologous mesophilic and thermophilic proteins, it can be presumed that the stabilizing alpha/beta-hydrophobic core in the [P62A]Ssh10b structure greatly contributes to the high thermostability of the protein.
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===Solution structure of Archaeon DNA-binding protein ssh10b===
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A stabilizing alpha/beta-hydrophobic core greatly contributes to hyperthermostability of archaeal [P62A]Ssh10b.,Fang X, Cui Q, Tong Y, Feng Y, Shan L, Huang L, Wang J Biochemistry. 2008 Oct 28;47(43):11212-21. Epub 2008 Sep 27. PMID:18821773<ref>PMID:18821773</ref>
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{{ABSTRACT_PUBMED_18821773}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==About this Structure==
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<div class="pdbe-citations 1y9x" style="background-color:#fffaf0;"></div>
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[[1y9x]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Sulfolobus_shibatae Sulfolobus shibatae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Y9X OCA].
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== References ==
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<references/>
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==Reference==
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__TOC__
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<ref group="xtra">PMID:018821773</ref><references group="xtra"/>
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</StructureSection>
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[[Category: Sulfolobus shibatae]]
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[[Category: Large Structures]]
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[[Category: Cui, Q.]]
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[[Category: Saccharolobus shibatae]]
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[[Category: Tong, Y.]]
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[[Category: Cui Q]]
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[[Category: Wang, J.]]
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[[Category: Tong Y]]
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[[Category: Archaea]]
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[[Category: Wang J]]
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[[Category: Dna binding]]
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[[Category: Dna binding protein]]
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Current revision

Solution structure of Archaeon DNA-binding protein ssh10b

PDB ID 1y9x

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