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==Solution structure of a dimeric lactose DNA-binding domain complexed to a nonspecific DNA sequence==
==Solution structure of a dimeric lactose DNA-binding domain complexed to a nonspecific DNA sequence==
<StructureSection load='1osl' size='340' side='right'caption='[[1osl]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
<StructureSection load='1osl' size='340' side='right'caption='[[1osl]]' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1osl]] is a 4 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=1OSL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1OSL FirstGlance]. <br>
<table><tr><td colspan='2'>[[1osl]] is a 4 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=1OSL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1OSL 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;'>[[1l1m|1l1m]]</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">LACI ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</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=1osl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1osl OCA], [https://pdbe.org/1osl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1osl RCSB], [https://www.ebi.ac.uk/pdbsum/1osl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1osl 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=1osl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1osl OCA], [https://pdbe.org/1osl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1osl RCSB], [https://www.ebi.ac.uk/pdbsum/1osl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1osl ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/LACI_ECOLI LACI_ECOLI]] Repressor of the lactose operon. Binds allolactose as an inducer.  
[https://www.uniprot.org/uniprot/LACI_ECOLI LACI_ECOLI] Repressor of the lactose operon. Binds allolactose as an inducer.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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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=1osl ConSurf].
</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=1osl ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Interaction of regulatory DNA binding proteins with their target sites is usually preceded by binding to nonspecific DNA. This speeds up the search for the target site by several orders of magnitude. We report the solution structure and dynamics of the complex of a dimeric lac repressor DNA binding domain with nonspecific DNA. The same set of residues can switch roles from a purely electrostatic interaction with the DNA backbone in the nonspecific complex to a highly specific binding mode with the base pairs of the cognate operator sequence. The protein-DNA interface of the nonspecific complex is flexible on biologically relevant time scales that may assist in the rapid and efficient finding of the target site.
Structure and flexibility adaptation in nonspecific and specific protein-DNA complexes.,Kalodimos CG, Biris N, Bonvin AM, Levandoski MM, Guennuegues M, Boelens R, Kaptein R Science. 2004 Jul 16;305(5682):386-9. PMID:15256668<ref>PMID:15256668</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1osl" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Lac repressor|Lac repressor]]
*[[Lac repressor|Lac repressor]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Bacillus coli migula 1895]]
[[Category: Escherichia coli]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Boelens, R]]
[[Category: Boelens R]]
[[Category: Bonvin, A M.J J]]
[[Category: Bonvin AMJJ]]
[[Category: Kalodimos, C G]]
[[Category: Kalodimos CG]]
[[Category: Kaptein, R]]
[[Category: Kaptein R]]
[[Category: Lac repressor]]
[[Category: Nonspecific interaction]]
[[Category: Protein-dna complex]]
[[Category: Transcription-dna complex]]

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