1pyi: Difference between revisions

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-[[Image:1pyi.gif|left|200px]]
-<!--
+==CRYSTAL STRUCTURE OF A PPR1-DNA COMPLEX: DNA RECOGNITION BY PROTEINS CONTAINING A ZN2CYS6 BINUCLEAR CLUSTER==
-The line below this paragraph, containing "STRUCTURE_1pyi", creates the "Structure Box" on the page.
+<StructureSection load='1pyi' size='340' side='right'caption='[[1pyi]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
-You may change the PDB parameter (which sets the PDB file loaded into the applet)
+== Structural highlights ==
-or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
+<table><tr><td colspan='2'>[[1pyi]] is a 4 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=1PYI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PYI FirstGlance]. <br>
-or leave the SCENE parameter empty for the default display.
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.2&#8491;</td></tr>
--->
+<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>
-{{STRUCTURE_1pyi|  PDB=1pyi  |  SCENE=  }}
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1pyi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pyi OCA], [https://pdbe.org/1pyi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pyi RCSB], [https://www.ebi.ac.uk/pdbsum/1pyi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pyi ProSAT]</span></td></tr>
+</table>
-'''CRYSTAL STRUCTURE OF A PPR1-DNA COMPLEX: DNA RECOGNITION BY PROTEINS CONTAINING A ZN2CYS6 BINUCLEAR CLUSTER'''
+== Function ==
+[https://www.uniprot.org/uniprot/PPR1_YEAST PPR1_YEAST] Positive regulator of URA1 and URA3 expression.
+== Evolutionary Conservation ==
-==Overview==
+[[Image:Consurf_key_small.gif|200px|right]]
-PPR1 is a yeast transcription factor that contains a six-cysteine, two-zinc (Zn) domain, homologous to a similar structure in GAL4. Like GAL4, it binds to DNA sites with conserved CGG triplets symmetrically placed near each end. Whereas the GAL4 site has 11 intervening base pairs, the PPR1 site has 6. The crystal structure of a 95-residue fragment of PPR1 in specific complex with DNA shows that the protein binds to a symmetrical 14-bp recognition site as a nonsymmetrical homodimer. An amino-terminal Zn domain interacts with a conserved CGG triplet near each end of the site through major groove contacts, and the carboxy-terminal residues mediate dimerization through a coiled-coil element and an extended strand. A linker region, connecting the Zn domain and the coiled-coil, folds into a beta-hairpin. This hairpin packs differently on the two subunits and leads to a striking asymmetry, which is largely restricted to the dimerization and linker regions of the protein. Comparison with the GAL4-DNA structure shows that their specificities for sites of different length are determined by the preferred folds of their respective linker segments and by residues at the amino-terminal ends of their coiled-coils. None of these residues contact DNA in PPR1, and they contact only the sugar phosphate backbone in GAL4. We propose that this novel mode of DNA site selection is employed by other proteins that contain a Zn2Cys6 binuclear cluster.
+Check<jmol>
+  <jmolCheckbox>
-==About this Structure==
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/py/1pyi_consurf.spt"</scriptWhenChecked>
-PYI 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=1PYI OCA].
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <text>to colour the structure by Evolutionary Conservation</text>
-==Reference==
+  </jmolCheckbox>
-Crystal structure of a PPR1-DNA complex: DNA recognition by proteins containing a Zn2Cys6 binuclear cluster., Marmorstein R, Harrison SC, Genes Dev. 1994 Oct 15;8(20):2504-12. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7958913 7958913]
+</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=1pyi ConSurf].
+<div style="clear:both"></div>
+__TOC__
+</StructureSection>
+[[Category: Large Structures]]
 [[Category: Saccharomyces cerevisiae]]
-[[Category: Single protein]]
+[[Category: Harrison SC]]
-[[Category: Harrison, S C.]]
+[[Category: Marmorstein R]]
-[[Category: Marmorstein, R.]]
-[[Category: Protein-dna complex]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 05:38:47 2008''