1q5y

<StructureSection load='1q5y' size='340' side='right' caption='[[1q5y]], [[Resolution|resolution]] 1.40&Aring;' scene=''>

<table><tr><td colspan='2'>[[1q5y]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q5Y OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Q5Y FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1q5v|1q5v]]</td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">NIKR ([http://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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q5y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q5y OCA], [http://pdbe.org/1q5y PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1q5y RCSB], [http://www.ebi.ac.uk/pdbsum/1q5y PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/NIKR_ECOLI NIKR_ECOLI]] Transcriptional repressor of the nikABCDE operon. Is active in the presence of excessive concentrations of intracellular nickel.[HAMAP-Rule:MF_00476]

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/q5/1q5y_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

NikR is a metal-responsive transcription factor that controls nickel uptake in Escherichia coli by regulating expression of a nickel-specific ATP-binding cassette (ABC) transporter. We have determined the first two structures of NikR: the full-length apo repressor at a resolution of 2.3 A and the nickel-bound C-terminal regulatory domain at a resolution of 1.4 A. NikR is the only known metal-responsive member of the ribbon-helix-helix family of transcription factors, and its structure has a quaternary arrangement consisting of two dimeric DNA-binding domains separated by a tetrameric regulatory domain that binds nickel. The position of the C-terminal regulatory domain enforces a large spacing between the contacts that each NikR DNA-binding domain can make with the nik operator. The regulatory domain of NikR contains four nickel-binding sites at the tetramer interface, each exhibiting a novel square-planar coordination by three histidines and one cysteine side chain.

Crystal structure of the nickel-responsive transcription factor NikR.,Schreiter ER, Sintchak MD, Guo Y, Chivers PT, Sauer RT, Drennan CL Nat Struct Biol. 2003 Oct;10(10):794-9. Epub 2003 Sep 14. PMID:12970756<ref>PMID:12970756</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1q5y" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Bacillus coli migula 1895]]

[[Category: Chivers, P T]]

[[Category: Drennan, C L]]

[[Category: Guo, Y]]

[[Category: Sauer, R T]]

[[Category: Schreiter, E R]]

[[Category: Sintchak, M D]]

[[Category: Regulatory domain]]