1dco: Difference between revisions

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{{STRUCTURE_1dco|  PDB=1dco  |  SCENE=  }}  
{{STRUCTURE_1dco|  PDB=1dco  |  SCENE=  }}  


'''DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR'''
===DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR===




==Overview==
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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.
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{{ABSTRACT_PUBMED_8897596}}


==About this Structure==
==About this Structure==
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[[Category: Transcriptional stimulator]]
[[Category: Transcriptional stimulator]]
[[Category: Transregulator of homeodomain protein]]
[[Category: Transregulator of homeodomain protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 22:49:51 2008''

Revision as of 22:49, 30 June 2008

File:1dco.png

Template:STRUCTURE 1dco

DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATORDCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR

Template:ABSTRACT PUBMED 8897596

About this StructureAbout this Structure

1DCO is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.

ReferenceReference

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

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