1f93: Difference between revisions

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[[Image:1f93.gif|left|200px]]
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[[Image:1f93.png|left|200px]]


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{{STRUCTURE_1f93|  PDB=1f93  |  SCENE=  }}  
{{STRUCTURE_1f93|  PDB=1f93  |  SCENE=  }}  


'''CRYSTAL STRUCTURE OF A COMPLEX BETWEEN THE DIMERIZATION DOMAIN OF HNF-1 ALPHA AND THE COACTIVATOR DCOH'''
===CRYSTAL STRUCTURE OF A COMPLEX BETWEEN THE DIMERIZATION DOMAIN OF HNF-1 ALPHA AND THE COACTIVATOR DCOH===




==Overview==
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Maturity-onset diabetes of the young type 3 (MODY3) results from mutations in the transcriptional activator hepatocyte nuclear factor-1alpha (HNF-1alpha). Several MODY3 mutations target the HNF-1alpha dimerization domain (HNF-p1), which binds the coactivator, dimerization cofactor of HNF-1 (DCoH). To define the mechanism of coactivator recognition and the basis for the MODY3 phenotype, we determined the cocrystal structure of the DCoH-HNF-p1 complex and characterized biochemically the effects of MODY3 mutations in HNF-p1. The DCoH-HNF-p1 complex comprises a dimer of dimers in which HNF-p1 forms a unique four-helix bundle. Through rearrangements of interfacial side chains, a single, bifunctional interface in the DCoH dimer mediates both HNF-1alpha binding and formation of a competing, transcriptionally inactive DCoH homotetramer. Consistent with the structure, MODY3 mutations in HNF-p1 reduce activator function by two distinct mechanisms.
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{{ABSTRACT_PUBMED_10966642}}


==About this Structure==
==About this Structure==
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[[Category: Four-helix bundle]]
[[Category: Four-helix bundle]]
[[Category: Transcriptional activator/coactivator complex]]
[[Category: Transcriptional activator/coactivator complex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 02:53:39 2008''

Revision as of 23:53, 30 June 2008

File:1f93.png

Template:STRUCTURE 1f93

CRYSTAL STRUCTURE OF A COMPLEX BETWEEN THE DIMERIZATION DOMAIN OF HNF-1 ALPHA AND THE COACTIVATOR DCOH

Template:ABSTRACT PUBMED 10966642

About this Structure

1F93 is a Protein complex structure of sequences from Rattus norvegicus. Full crystallographic information is available from OCA.

Reference

Structural basis of dimerization, coactivator recognition and MODY3 mutations in HNF-1alpha., Rose RB, Bayle JH, Endrizzi JA, Cronk JD, Crabtree GR, Alber T, Nat Struct Biol. 2000 Sep;7(9):744-8. PMID:10966642

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