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1q5v

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[[Image:1q5v.jpg|left|200px]]
 
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{{Structure
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==Apo-NikR==
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|PDB= 1q5v |SIZE=350|CAPTION= <scene name='initialview01'>1q5v</scene>, resolution 2.30&Aring;
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<StructureSection load='1q5v' size='340' side='right'caption='[[1q5v]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[1q5v]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q5V OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1Q5V FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
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|GENE= NIKR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])
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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=1q5v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q5v OCA], [https://pdbe.org/1q5v PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1q5v RCSB], [https://www.ebi.ac.uk/pdbsum/1q5v PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1q5v ProSAT]</span></td></tr>
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|DOMAIN=
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</table>
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|RELATEDENTRY=[[1q5y|1Q5Y]]
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== Function ==
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q5v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q5v OCA], [http://www.ebi.ac.uk/pdbsum/1q5v PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1q5v RCSB]</span>
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[https://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]
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}}
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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'''Apo-NikR'''
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/q5/1q5v_consurf.spt"</scriptWhenChecked>
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==Overview==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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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.
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==About this Structure==
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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=1q5v ConSurf].
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1Q5V is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q5V OCA].
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<div style="clear:both"></div>
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__TOC__
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==Reference==
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</StructureSection>
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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:[http://www.ncbi.nlm.nih.gov/pubmed/12970756 12970756]
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Chivers, P T.]]
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[[Category: Chivers PT]]
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[[Category: Drennan, C L.]]
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[[Category: Drennan CL]]
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[[Category: Guo, Y.]]
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[[Category: Guo Y]]
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[[Category: Sauer, R T.]]
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[[Category: Sauer RT]]
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[[Category: Schreiter, E R.]]
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[[Category: Schreiter ER]]
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[[Category: Sintchak, M D.]]
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[[Category: Sintchak MD]]
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[[Category: beta sandwich]]
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[[Category: homotetramer]]
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[[Category: ribbon-helix-helix domain]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:09:14 2008''
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Current revision

Apo-NikR

PDB ID 1q5v

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