1qp9

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[[Image:1qp9.gif|left|200px]]
 
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==STRUCTURE OF HAP1-PC7 COMPLEXED TO THE UAS OF CYC7==
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The line below this paragraph, containing "STRUCTURE_1qp9", creates the "Structure Box" on the page.
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<StructureSection load='1qp9' size='340' side='right'caption='[[1qp9]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1qp9]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QP9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QP9 FirstGlance]. <br>
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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]] 2.8&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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{{STRUCTURE_1qp9| PDB=1qp9 | SCENE= }}
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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=1qp9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qp9 OCA], [https://pdbe.org/1qp9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1qp9 RCSB], [https://www.ebi.ac.uk/pdbsum/1qp9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1qp9 ProSAT]</span></td></tr>
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</table>
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'''STRUCTURE OF HAP1-PC7 COMPLEXED TO THE UAS OF CYC7'''
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== Function ==
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[https://www.uniprot.org/uniprot/HAP1_YEASX HAP1_YEASX] Regulation of oxygen dependent gene expression. It modulates the expression of Iso-1 (CYP1) and Iso-2 (CYP3) cytochrome c. In response to heme, promotes transcription of genes encoding functions required for respiration, controlling oxidative damage and repression of anaerobic genes. Binds to the sequence 5'-CGGNNNTNNCGG-3'. Is non-functional in terms of iso-1 cytochrome c expression in strain S288c and its derivatives.<ref>PMID:10541856</ref> <ref>PMID:11689685</ref> <ref>PMID:2851658</ref> <ref>PMID:9027731</ref>
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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HAP1 is a transcription factor in yeast whose DNA-binding domain has been implicated in directly affecting transcriptional activation. Two separate mutations in the DNA-binding domain, S63G (HAP1-PC7) and S63R (HAP1-18), retain wild-type binding affinity. However, HAP1-PC7 is transcriptionally silent while HAP1-18 shows highly elevated levels of transcription. We have determined the X-ray crystal structure of the DNA-binding domain of HAP1-PC7 bound to its DNA target, UAS(CYC7), and compared it to the previously solved HAP1-wt and HAP1-18 complexes to UAS(CYC7). Additionally, we have quantitatively compared the DNA-binding affinity and specificity of the HAP1-PC7, HAP1-18 and HAP1-wt DNA-binding domains. We show that, although the DNA-binding domains of these three proteins bind UAS(CYC7) with comparable affinity and specificity, the protein-DNA interactions are dramatically different between the three complexes. Conserved protein-DNA interactions are largely restricted to an internal DNA sequence that excludes one of the two conserved DNA half-sites of UAS(CYC7) suggesting a mode of recognition distinct from other HAP1 family members. Alternative protein-DNA interactions result in divergent DNA configurations between the three complexes. These results suggest that the differential transcriptional activities of the HAP1, HAP1-18 and HAP1-PC7 proteins are due, at least in part, to alternative protein-DNA contacts, and implies that HAP1-DNA interactions have direct allosteric effects on transcriptional activation.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/qp/1qp9_consurf.spt"</scriptWhenChecked>
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1QP9 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QP9 OCA].
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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==Reference==
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</jmolCheckbox>
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Structure of HAP1-PC7 bound to DNA: implications for DNA recognition and allosteric effects of DNA-binding on transcriptional activation., Lukens AK, King DA, Marmorstein R, Nucleic Acids Res. 2000 Oct 15;28(20):3853-63. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11024163 11024163]
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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=1qp9 ConSurf].
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Saccharomyces cerevisiae]]
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[[Category: Single protein]]
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[[Category: King D]]
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[[Category: King, D.]]
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[[Category: Lukens A]]
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[[Category: Lukens, A.]]
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[[Category: Marmorstein R]]
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[[Category: Marmorstein, R.]]
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[[Category: Coiled-coil]]
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[[Category: Heptad repeat]]
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[[Category: Zinc binuclear cluster]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 06:32:43 2008''
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Current revision

STRUCTURE OF HAP1-PC7 COMPLEXED TO THE UAS OF CYC7

PDB ID 1qp9

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