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1hqo

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(New page: 200px<br /><applet load="1hqo" size="450" color="white" frame="true" align="right" spinBox="true" caption="1hqo, resolution 2.3&Aring;" /> '''CRYSTAL STRUCTURE OF ...)
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[[Image:1hqo.jpg|left|200px]]<br /><applet load="1hqo" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1hqo, resolution 2.3&Aring;" />
 
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'''CRYSTAL STRUCTURE OF THE NITROGEN REGULATION FRAGMENT OF THE YEAST PRION PROTEIN URE2P'''<br />
 
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==Overview==
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==CRYSTAL STRUCTURE OF THE NITROGEN REGULATION FRAGMENT OF THE YEAST PRION PROTEIN URE2P==
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The yeast nonchromosomal gene [URE3] is due to a prion form of the, nitrogen regulatory protein Ure2p. It is a negative regulator of nitrogen, catabolism and acts by inhibiting the transcription factor Gln3p. Ure2p, residues 1--80 are necessary for prion generation and propagation. The, C-terminal fragment retains nitrogen regulatory activity, albeit somewhat, less efficiently than the full-length protein, and it also lowers the, frequency of prion generation. The crystal structure of this C-terminal, fragment, Ure2p(97--354), at 2.3 A resolution is described here. It adopts, the same fold as the glutathione S-transferase superfamily, consistent, with their sequence similarity. However, Ure2p(97--354) lacks a properly, positioned catalytic residue that is required for S-transferase activity., Residues within this regulatory fragment that have been indicated by, mutational studies to influence prion generation have been mapped onto the, three-dimensional structure, and possible implications for prion activity, are discussed.
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<StructureSection load='1hqo' size='340' side='right'caption='[[1hqo]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1hqo]] is a 2 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=1HQO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HQO 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]] 2.3&#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=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
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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=1hqo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hqo OCA], [https://pdbe.org/1hqo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hqo RCSB], [https://www.ebi.ac.uk/pdbsum/1hqo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hqo ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/URE2_YEAST URE2_YEAST] Plays an important role in nitrogen catabolite repression. Down-regulates the expression of many genes involved in nitrogen utilization by inhibiting the GATA transcriptional activators GLN3 and GAT1. Under good nitrogen conditions, binds to the phosphorylated forms of GLN3 and GAT1 and sequesters them in the cytoplasm, preventing transcription of genes expressed upon nitrogen limitation. Is also an atypical glutaredoxin without a catalytical cysteine residue. Has glutathione peroxidase and thiol:disulfide oxidoreductase activities in both native and fibrillar form. Also shows insulin disulfide reductase and dehydroascorbic acid reductase (DHAR) actvites.<ref>PMID:1990286</ref> <ref>PMID:8755910</ref> <ref>PMID:10604478</ref> <ref>PMID:10799523</ref> <ref>PMID:15371425</ref> <ref>PMID:19321443</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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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/hq/1hqo_consurf.spt"</scriptWhenChecked>
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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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</jmolCheckbox>
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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=1hqo ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1HQO is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1HQO OCA].
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*[[Prion 3D structures|Prion 3D structures]]
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== References ==
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==Reference==
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<references/>
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The crystal structure of the nitrogen regulation fragment of the yeast prion protein Ure2p., Umland TC, Taylor KL, Rhee S, Wickner RB, Davies DR, Proc Natl Acad Sci U S A. 2001 Feb 13;98(4):1459-64. Epub 2001 Feb 6. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11171973 11171973]
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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: Davies DR]]
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[[Category: Davies, D.R.]]
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[[Category: Rhee S]]
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[[Category: Rhee, S.]]
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[[Category: Taylor KL]]
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[[Category: Taylor, K.L.]]
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[[Category: Umland TC]]
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[[Category: Umland, T.C.]]
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[[Category: Wickner RB]]
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[[Category: Wickner, R.B.]]
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[[Category: glutathione s-transferase superfamily fold]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 16:45:20 2007''
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CRYSTAL STRUCTURE OF THE NITROGEN REGULATION FRAGMENT OF THE YEAST PRION PROTEIN URE2P

PDB ID 1hqo

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