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[[Image:1dco.jpg|left|200px]]


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==DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR==
The line below this paragraph, containing "STRUCTURE_1dco", creates the "Structure Box" on the page.
<StructureSection load='1dco' size='340' side='right'caption='[[1dco]], [[Resolution|resolution]] 2.30&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'>[[1dco]] is a 8 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=1DCO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DCO 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]] 2.3&#8491;</td></tr>
-->
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1dco FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dco OCA], [https://pdbe.org/1dco PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dco RCSB], [https://www.ebi.ac.uk/pdbsum/1dco PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dco ProSAT]</span></td></tr>
{{STRUCTURE_1dco|  PDB=1dco  |  SCENE= }}
</table>
 
== Function ==
'''DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR'''
[https://www.uniprot.org/uniprot/PHS_RAT PHS_RAT] Involved in tetrahydrobiopterin biosynthesis. Seems to both prevent the formation of 7-pterins and accelerate the formation of quinonoid-BH2. Coactivator for HNF1A-dependent transcription. Regulates the dimerization of homeodomain protein HNF1A and enhances its transcriptional activity.<ref>PMID:1763325</ref> <ref>PMID:8444860</ref>
 
== Evolutionary Conservation ==
 
[[Image:Consurf_key_small.gif|200px|right]]
==Overview==
Check<jmol>
DCoH, the dimerization cofactor of hepatocyte nuclear factor 1 (HNF-1), functions as both a transcriptional coactivator and a pterin dehydratase. To probe the relationship between these two functions, the X-ray crystal structures of the free enzyme and its complex with the product analogue 7,8-dihydrobiopterin were refined at 2.3 A resolution. The ligand binds at four sites per tetrameric enzyme, with little apparent conformational change in the protein. Each active-site cleft is located in a subunit interface, adjacent to a prominent saddle motif that has structural similarities to the TATA binding protein. The pterin binds within an arch of aromatic residues that extends across one dimer interface. The bound ligand makes contacts to three conserved histidines, and this arrangement restricts proposals for the enzymatic mechanism of dehydration. The dihedral symmetry of DCoH suggests that binding to the dimerization domain of HNF-1 likely involves the superposition of two-fold rotation axes of the two proteins.
  <jmolCheckbox>
 
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dc/1dco_consurf.spt"</scriptWhenChecked>
==About this Structure==
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
1DCO is a [[Single protein]] structure of sequence 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=1DCO OCA].  
    <text>to colour the structure by Evolutionary Conservation</text>
 
  </jmolCheckbox>
==Reference==
</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=1dco ConSurf].
High-resolution structures of the bifunctional enzyme and transcriptional coactivator DCoH and its complex with a product analogue., Cronk JD, Endrizzi JA, Alber T, Protein Sci. 1996 Oct;5(10):1963-72. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8897596 8897596]
<div style="clear:both"></div>
[[Category: 4a-hydroxytetrahydrobiopterin dehydratase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
[[Category: Single protein]]
[[Category: Alber T]]
[[Category: Alber, T.]]
[[Category: Cronk JD]]
[[Category: Cronk, J D.]]
[[Category: Endrizzi JA]]
[[Category: Endrizzi, J A.]]
[[Category: 4a-carbinolamine dehydratase]]
[[Category: Dehydratase]]
[[Category: Dimerization cofactor]]
[[Category: Transcriptional stimulator]]
[[Category: Transregulator of homeodomain protein]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 13:41:58 2008''

Latest revision as of 06:52, 7 February 2024

DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR

1dco, resolution 2.30Å

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