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| | ==Solution structure of Archaeon DNA-binding protein ssh10b== | | ==Solution structure of Archaeon DNA-binding protein ssh10b== |
| - | <StructureSection load='1y9x' size='340' side='right'caption='[[1y9x]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='1y9x' size='340' side='right'caption='[[1y9x]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1y9x]] is a 2 chain structure with sequence from [http://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 [http://proteopedia.org/fgij/fg.htm?mol=1Y9X FirstGlance]. <br> | + | <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> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">albA1, ssh10b ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2286 'Saccharolobus shibatae'])</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=1y9x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1y9x OCA], [http://pdbe.org/1y9x PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1y9x RCSB], [http://www.ebi.ac.uk/pdbsum/1y9x PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1y9x 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=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> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ALBA1_SULSH ALBA1_SULSH]] 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.[HAMAP-Rule:MF_01122] | + | [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. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Saccharolobus shibatae]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Cui, Q]] | + | [[Category: Saccharolobus shibatae]] |
| - | [[Category: Tong, Y]] | + | [[Category: Cui Q]] |
| - | [[Category: Wang, J]] | + | [[Category: Tong Y]] |
| - | [[Category: Archaea]] | + | [[Category: Wang J]] |
| - | [[Category: Dna binding]]
| + | |
| - | [[Category: Dna binding protein]]
| + | |
| Structural highlights
Function
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.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
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.
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[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Fang X, Cui Q, Tong Y, Feng Y, Shan L, Huang L, Wang J. A stabilizing alpha/beta-hydrophobic core greatly contributes to hyperthermostability of archaeal [P62A]Ssh10b. Biochemistry. 2008 Oct 28;47(43):11212-21. Epub 2008 Sep 27. PMID:18821773 doi:10.1021/bi8007593
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