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| | <StructureSection load='2i5l' size='340' side='right'caption='[[2i5l]], [[Resolution|resolution]] 2.55Å' scene=''> | | <StructureSection load='2i5l' size='340' side='right'caption='[[2i5l]], [[Resolution|resolution]] 2.55Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2i5l]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_globigii"_migula_1900 "bacillus globigii" migula 1900]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2I5L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2I5L FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2i5l]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2I5L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2I5L FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1csp|1csp]], [[1csq|1csq]], [[2es2|2es2]], [[2i5m|2i5m]]</div></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.55Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cspB, cspA ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 "Bacillus globigii" Migula 1900])</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=2i5l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i5l OCA], [https://pdbe.org/2i5l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2i5l RCSB], [https://www.ebi.ac.uk/pdbsum/2i5l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2i5l 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=2i5l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i5l OCA], [https://pdbe.org/2i5l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2i5l RCSB], [https://www.ebi.ac.uk/pdbsum/2i5l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2i5l ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/CSPB_BACSU CSPB_BACSU]] Binds to the pentamer sequences ATTGG and CCAAT with highest affinity in single-stranded DNA, and also to other sequences. Has greater affinity for ATTGG than CCAAT. Can act as transcriptional activator of cold shock genes by recognizing putative ATTGG-box elements present in promoter regions of genes induced under cold shock conditions.
| + | [https://www.uniprot.org/uniprot/CSPB_BACSU CSPB_BACSU] Binds to the pentamer sequences ATTGG and CCAAT with highest affinity in single-stranded DNA, and also to other sequences. Has greater affinity for ATTGG than CCAAT. Can act as transcriptional activator of cold shock genes by recognizing putative ATTGG-box elements present in promoter regions of genes induced under cold shock conditions. |
| | == 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: Bacillus globigii migula 1900]] | + | [[Category: Bacillus subtilis]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Heinemann, U]] | + | [[Category: Heinemann U]] |
| - | [[Category: Max, K E.A]] | + | [[Category: Max KEA]] |
| - | [[Category: Beta-barrel]]
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| - | [[Category: Cold shock domain]]
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| - | [[Category: Dna binding protein]]
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| - | [[Category: Expression regulator]]
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| - | [[Category: Gene regulation]]
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| - | [[Category: Oligonucleotide/oligosaccharide binding fold]]
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| Structural highlights
Function
CSPB_BACSU Binds to the pentamer sequences ATTGG and CCAAT with highest affinity in single-stranded DNA, and also to other sequences. Has greater affinity for ATTGG than CCAAT. Can act as transcriptional activator of cold shock genes by recognizing putative ATTGG-box elements present in promoter regions of genes induced under cold shock conditions.
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 bacterial cold shock proteins (Csp) are widely used as models for the experimental and computational analysis of protein stability. In a previous study, in vitro evolution was employed to identify strongly stabilizing mutations in Bs-CspB from Bacillus subtilis. The best variant found by this approach contained the mutations M1R, E3K and K65I, which raised the midpoint of thermal unfolding of Bs-CspB from 53.8 degrees C to 83.7 degrees C, and increased the Gibbs free energy of stabilization by 20.9 kJ mol(-1). Another selected variant with the two mutations A46K and S48R was stabilized by 11.1 kJ mol(-1). To elucidate the molecular basis of these stabilizations, we determined the crystal structures of these two Bs-CspB variants. The mutated residues are generally well ordered and provide additional stabilizing interactions, such as charge interactions, additional hydrogen bonds and improved side-chain packing. Several mutations improve the electrostatic interactions, either by the removal of unfavorable charges (E3K) or by compensating their destabilizing interactions (A46K, S48R). The stabilizing mutations are clustered at a contiguous surface area of Bs-CspB, which apparently is critically important for the stability of the beta-barrel structure but not well optimized in the wild-type protein.
Optimized variants of the cold shock protein from in vitro selection: structural basis of their high thermostability.,Max KE, Wunderlich M, Roske Y, Schmid FX, Heinemann U J Mol Biol. 2007 Jun 15;369(4):1087-97. Epub 2007 Apr 12. PMID:17481655[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Max KE, Wunderlich M, Roske Y, Schmid FX, Heinemann U. Optimized variants of the cold shock protein from in vitro selection: structural basis of their high thermostability. J Mol Biol. 2007 Jun 15;369(4):1087-97. Epub 2007 Apr 12. PMID:17481655 doi:10.1016/j.jmb.2007.04.016
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