5ds9
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of Fis bound to 27bp DNA F1-8A (AAATTAGTTTGAATTTTGAGCTAATTT)== | |
| + | <StructureSection load='5ds9' size='340' side='right' caption='[[5ds9]], [[Resolution|resolution]] 2.56Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5ds9]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5DS9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5DS9 FirstGlance]. <br> | ||
| + | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5dtd|5dtd]], [[5e3l|5e3l]], [[5e3n|5e3n]], [[5e3o|5e3o]], [[5e3m|5e3m]]</td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5ds9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ds9 OCA], [http://pdbe.org/5ds9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ds9 RCSB], [http://www.ebi.ac.uk/pdbsum/5ds9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5ds9 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/FIS_ECOLI FIS_ECOLI]] Activates ribosomal RNA transcription, as well other genes. Plays a direct role in upstream activation of rRNA promoters. Binds to a recombinational enhancer sequence that is required to stimulate hin-mediated DNA inversion. Prevents initiation of DNA replication from oriC.<ref>PMID:2209559</ref> <ref>PMID:8836178</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The abundant Fis nucleoid protein selectively binds poorly related DNA sequences with high affinities to regulate diverse DNA reactions. Fis binds DNA primarily through DNA backbone contacts and selects target sites by reading conformational properties of DNA sequences, most prominently intrinsic minor groove widths. High-affinity binding requires Fis-stabilized DNA conformational changes that vary depending on DNA sequence. In order to better understand the molecular basis for high affinity site recognition, we analyzed the effects of DNA sequence within and flanking the core Fis binding site on binding affinity and DNA structure. X-ray crystal structures of Fis-DNA complexes containing variable sequences in the noncontacted center of the binding site or variations within the major groove interfaces show that the DNA can adapt to the Fis dimer surface asymmetrically. We show that the presence and position of pyrimidine-purine base steps within the major groove interfaces affect both local DNA bending and minor groove compression to modulate affinities and lifetimes of Fis-DNA complexes. Sequences flanking the core binding site also modulate complex affinities, lifetimes, and the degree of local and global Fis-induced DNA bending. In particular, a G immediately upstream of the 15 bp core sequence inhibits binding and bending, and A-tracts within the flanking base pairs increase both complex lifetimes and global DNA curvatures. Taken together, our observations support a revised DNA motif specifying high-affinity Fis binding and highlight the range of conformations that Fis-bound DNA can adopt. The affinities and DNA conformations of individual Fis-DNA complexes are likely to be tailored to their context-specific biological functions. | ||
| - | + | DNA Sequence Determinants Controlling Affinity, Stability and Shape of DNA Complexes Bound by the Nucleoid Protein Fis.,Hancock SP, Stella S, Cascio D, Johnson RC PLoS One. 2016 Mar 9;11(3):e0150189. doi: 10.1371/journal.pone.0150189., eCollection 2016. PMID:26959646<ref>PMID:26959646</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | <div class="pdbe-citations 5ds9" style="background-color:#fffaf0;"></div> | |
| - | + | == References == | |
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
[[Category: Cascio, D]] | [[Category: Cascio, D]] | ||
| + | [[Category: Hancock, S P]] | ||
| + | [[Category: Johnson, R C]] | ||
| + | [[Category: Dna bending]] | ||
| + | [[Category: Dna binding protein-dna complex]] | ||
| + | [[Category: Hth domain]] | ||
| + | [[Category: Indirect recognition]] | ||
| + | [[Category: Protein-dna complex]] | ||
Revision as of 15:37, 27 July 2016
Crystal structure of Fis bound to 27bp DNA F1-8A (AAATTAGTTTGAATTTTGAGCTAATTT)
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