1dco

From Proteopedia

(Difference between revisions)

Revision as of 08:28, 6 December 2017

DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR

Structural highlights

1dco is a 8 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Activity:	4a-hydroxytetrahydrobiopterin dehydratase, with EC number 4.2.1.96
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[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.^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

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.

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:8897596^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Mendel DB, Khavari PA, Conley PB, Graves MK, Hansen LP, Admon A, Crabtree GR. Characterization of a cofactor that regulates dimerization of a mammalian homeodomain protein. Science. 1991 Dec 20;254(5039):1762-7. PMID:1763325
↑ Hauer CR, Rebrin I, Thony B, Neuheiser F, Curtius HC, Hunziker P, Blau N, Ghisla S, Heizmann CW. Phenylalanine hydroxylase-stimulating protein/pterin-4 alpha-carbinolamine dehydratase from rat and human liver. Purification, characterization, and complete amino acid sequence. J Biol Chem. 1993 Mar 5;268(7):4828-31. PMID:8444860
↑ Cronk JD, Endrizzi JA, Alber T. High-resolution structures of the bifunctional enzyme and transcriptional coactivator DCoH and its complex with a product analogue. Protein Sci. 1996 Oct;5(10):1963-72. PMID:8897596

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1dco"

@@ Line 1: / Line 1: @@
 ==DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR==
 <StructureSection load='1dco' size='340' side='right' caption='[[1dco]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
@@ Line 4: / Line 5: @@
 <table><tr><td colspan='2'>[[1dco]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. 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 [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DCO FirstGlance]. <br>
 </td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/4a-hydroxytetrahydrobiopterin_dehydratase 4a-hydroxytetrahydrobiopterin dehydratase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.96 4.2.1.96] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dco FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dco OCA], [http://pdbe.org/1dco PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1dco RCSB], [http://www.ebi.ac.uk/pdbsum/1dco PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dco FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dco OCA], [http://pdbe.org/1dco PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1dco RCSB], [http://www.ebi.ac.uk/pdbsum/1dco PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1dco ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 12: / Line 13: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dc/1dco_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dc/1dco_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1dco

From Proteopedia

Revision as of 08:28, 6 December 2017

DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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