1is7: Difference between revisions

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[[Image:1is7.png|left|200px]]


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==Crystal structure of rat GTPCHI/GFRP stimulatory complex==
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<StructureSection load='1is7' size='340' side='right'caption='[[1is7]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1is7]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IS7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1IS7 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=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=PHE:PHENYLALANINE'>PHE</scene></td></tr>
{{STRUCTURE_1is7|  PDB=1is7  |  SCENE=  }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1is7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1is7 OCA], [https://pdbe.org/1is7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1is7 RCSB], [https://www.ebi.ac.uk/pdbsum/1is7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1is7 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GCH1_RAT GCH1_RAT] May positively regulate nitric oxide synthesis in endothelial cells. May be involved in dopamine synthesis (By similarity). May modify pain sensitivity and persistence.<ref>PMID:17057711</ref>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
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    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/is/1is7_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1is7 ConSurf].
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== Publication Abstract from PubMed ==
In the presence of phenylalanine, GTP cyclohydrolase I feedback regulatory protein (GFRP) forms a stimulatory 360-kDa complex with GTP cyclohydrolase I (GTPCHI), which is the rate-limiting enzyme in the biosynthesis of tetrahydrobiopterin. The crystal structure of the stimulatory complex reveals that the GTPCHI decamer is sandwiched by two GFRP homopentamers. Each GFRP pentamer forms a symmetrical five-membered ring similar to beta-propeller. Five phenylalanine molecules are buried inside each interface between GFRP and GTPCHI, thus enhancing the binding of these proteins. The complex structure suggests that phenylalanine-induced GTPCHI x GFRP complex formation enhances GTPCHI activity by locking the enzyme in the active state.


===Crystal structure of rat GTPCHI/GFRP stimulatory complex===
Crystal structure of the stimulatory complex of GTP cyclohydrolase I and its feedback regulatory protein GFRP.,Maita N, Okada K, Hatakeyama K, Hakoshima T Proc Natl Acad Sci U S A. 2002 Feb 5;99(3):1212-7. Epub 2002 Jan 29. PMID:11818540<ref>PMID:11818540</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 1is7" style="background-color:#fffaf0;"></div>


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==See Also==
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*[[Cyclohydrolase 3D structures|Cyclohydrolase 3D structures]]
(as it appears on PubMed at http://www.pubmed.gov), where 11818540 is the PubMed ID number.
== References ==
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<references/>
{{ABSTRACT_PUBMED_11818540}}
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</StructureSection>
==About this Structure==
[[Category: Large Structures]]
1IS7 is a 20 chains structure of sequences from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IS7 OCA].
 
==Reference==
<ref group="xtra">PMID:11818540</ref><references group="xtra"/>
[[Category: GTP cyclohydrolase I]]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
[[Category: Hakoshima, T.]]
[[Category: Hakoshima T]]
[[Category: Hatakeyama, K.]]
[[Category: Hatakeyama K]]
[[Category: Maita, N.]]
[[Category: Maita N]]
[[Category: Okada, K.]]
[[Category: Okada K]]
[[Category: Enzyme-regulatory protein complex]]
 
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