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| | ==Solution Structure of the Oligomerization Domain of the Bacterial Chromatin-Structuring Protein H-NS== | | ==Solution Structure of the Oligomerization Domain of the Bacterial Chromatin-Structuring Protein H-NS== |
| - | <StructureSection load='1lr1' size='340' side='right'caption='[[1lr1]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='1lr1' size='340' side='right'caption='[[1lr1]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1lr1]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LR1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LR1 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1lr1]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LR1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LR1 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;'>[[1hns|1hns]]</div></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='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">hns ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</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=1lr1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lr1 OCA], [https://pdbe.org/1lr1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lr1 RCSB], [https://www.ebi.ac.uk/pdbsum/1lr1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lr1 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=1lr1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lr1 OCA], [https://pdbe.org/1lr1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lr1 RCSB], [https://www.ebi.ac.uk/pdbsum/1lr1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lr1 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/HNS_ECOLI HNS_ECOLI]] A DNA-binding protein implicated in transcriptional repression (silencing) as well as in bacterial chromosome organization. H-NS binds tightly to AT-rich dsDNA, increases its thermal stability and inhibits transcription. Also binds to ssDNA and RNA but with a much lower affinity. H-NS has possible histone-like function. May be a global transcriptional regulator through its ability to bind to curved DNA sequences, which are found in regions upstream of a certain subset of promoters. Plays a role in the thermal control of pili and adhesive curli fimbriae production, by inducing transcription of csgD. Represses the CRISPR-cas promoters, permits only weak transcription of the crRNA precursor; its role is antagonized by LeuO. Subject to transcriptional auto-repression. Binds preferentially to the upstream region of its own gene recognizing two segments of DNA on both sides of a bend centered around -150.<ref>PMID:7934818</ref> <ref>PMID:11031114</ref> <ref>PMID:17010156</ref> <ref>PMID:20659289</ref>
| + | [https://www.uniprot.org/uniprot/HNS_ECOLI HNS_ECOLI] A DNA-binding protein implicated in transcriptional repression (silencing) as well as in bacterial chromosome organization. H-NS binds tightly to AT-rich dsDNA, increases its thermal stability and inhibits transcription. Also binds to ssDNA and RNA but with a much lower affinity. H-NS has possible histone-like function. May be a global transcriptional regulator through its ability to bind to curved DNA sequences, which are found in regions upstream of a certain subset of promoters. Plays a role in the thermal control of pili and adhesive curli fimbriae production, by inducing transcription of csgD. Represses the CRISPR-cas promoters, permits only weak transcription of the crRNA precursor; its role is antagonized by LeuO. Subject to transcriptional auto-repression. Binds preferentially to the upstream region of its own gene recognizing two segments of DNA on both sides of a bend centered around -150.<ref>PMID:7934818</ref> <ref>PMID:11031114</ref> <ref>PMID:17010156</ref> <ref>PMID:20659289</ref> |
| | == 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 coli migula 1895]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Driscoll, P C]] | + | [[Category: Driscoll PC]] |
| - | [[Category: Eccleston, J]] | + | [[Category: Eccleston J]] |
| - | [[Category: Esposito, D]] | + | [[Category: Esposito D]] |
| - | [[Category: Haq, I]] | + | [[Category: Haq I]] |
| - | [[Category: Harris, R]] | + | [[Category: Harris R]] |
| - | [[Category: Higgins, C F]] | + | [[Category: Higgins CF]] |
| - | [[Category: Hinton, J C.D]] | + | [[Category: Hinton JCD]] |
| - | [[Category: Ladbury, J E]] | + | [[Category: Ladbury JE]] |
| - | [[Category: Mbabaali, A]] | + | [[Category: Mbabaali A]] |
| - | [[Category: Ono, S]] | + | [[Category: Ono S]] |
| - | [[Category: Petrovic, A]] | + | [[Category: Petrovic A]] |
| - | [[Category: Chromatin]]
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| - | [[Category: Coiled-coil]]
| + | |
| - | [[Category: Dna binding protein]]
| + | |
| - | [[Category: Dna packaging]]
| + | |
| - | [[Category: Nucleoid assembly]]
| + | |
| Structural highlights
Function
HNS_ECOLI A DNA-binding protein implicated in transcriptional repression (silencing) as well as in bacterial chromosome organization. H-NS binds tightly to AT-rich dsDNA, increases its thermal stability and inhibits transcription. Also binds to ssDNA and RNA but with a much lower affinity. H-NS has possible histone-like function. May be a global transcriptional regulator through its ability to bind to curved DNA sequences, which are found in regions upstream of a certain subset of promoters. Plays a role in the thermal control of pili and adhesive curli fimbriae production, by inducing transcription of csgD. Represses the CRISPR-cas promoters, permits only weak transcription of the crRNA precursor; its role is antagonized by LeuO. Subject to transcriptional auto-repression. Binds preferentially to the upstream region of its own gene recognizing two segments of DNA on both sides of a bend centered around -150.[1] [2] [3] [4]
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
H-NS plays a role in condensing DNA in the bacterial nucleoid. This 136 amino acid protein comprises two functional domains separated by a flexible linker. High order structures formed by the N-terminal oligomerization domain (residues 1-89) constitute the basis of a protein scaffold that binds DNA via the C-terminal domain. Deletion of residues 57-89 or 64-89 of the oligomerization domain precludes high order structure formation, yielding a discrete dimer. This dimerization event represents the initial event in the formation of high order structure. The dimers thus constitute the basic building block of the protein scaffold. The three-dimensional solution structure of one of these units (residues 1-57) has been determined. Activity of these structural units is demonstrated by a dominant negative effect on high order structure formation on addition to the full length protein. Truncated and site-directed mutant forms of the N-terminal domain of H-NS reveal how the dimeric unit self-associates in a head-to-tail manner and demonstrate the importance of secondary structure in this interaction to form high order structures. A model is presented for the structural basis for DNA packaging in bacterial cells.
H-NS oligomerization domain structure reveals the mechanism for high order self-association of the intact protein.,Esposito D, Petrovic A, Harris R, Ono S, Eccleston JF, Mbabaali A, Haq I, Higgins CF, Hinton JC, Driscoll PC, Ladbury JE J Mol Biol. 2002 Dec 6;324(4):841-50. PMID:12460581[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Falconi M, Higgins NP, Spurio R, Pon CL, Gualerzi CO. Expression of the gene encoding the major bacterial nucleotide protein H-NS is subject to transcriptional auto-repression. Mol Microbiol. 1993 Oct;10(2):273-82. PMID:7934818
- ↑ Ko M, Park C. Two novel flagellar components and H-NS are involved in the motor function of Escherichia coli. J Mol Biol. 2000 Oct 27;303(3):371-82. PMID:11031114 doi:http://dx.doi.org/10.1006/jmbi.2000.4147
- ↑ Weber H, Pesavento C, Possling A, Tischendorf G, Hengge R. Cyclic-di-GMP-mediated signalling within the sigma network of Escherichia coli. Mol Microbiol. 2006 Nov;62(4):1014-34. Epub 2006 Sep 29. PMID:17010156 doi:http://dx.doi.org/MMI5440
- ↑ Westra ER, Pul U, Heidrich N, Jore MM, Lundgren M, Stratmann T, Wurm R, Raine A, Mescher M, Van Heereveld L, Mastop M, Wagner EG, Schnetz K, Van Der Oost J, Wagner R, Brouns SJ. H-NS-mediated repression of CRISPR-based immunity in Escherichia coli K12 can be relieved by the transcription activator LeuO. Mol Microbiol. 2010 Sep;77(6):1380-93. doi: 10.1111/j.1365-2958.2010.07315.x., Epub 2010 Aug 18. PMID:20659289 doi:http://dx.doi.org/10.1111/j.1365-2958.2010.07315.x
- ↑ Esposito D, Petrovic A, Harris R, Ono S, Eccleston JF, Mbabaali A, Haq I, Higgins CF, Hinton JC, Driscoll PC, Ladbury JE. H-NS oligomerization domain structure reveals the mechanism for high order self-association of the intact protein. J Mol Biol. 2002 Dec 6;324(4):841-50. PMID:12460581
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