1IC8 image
Entry Detail
PDB ID:
1IC8
Title:
HEPATOCYTE NUCLEAR FACTOR 1A BOUND TO DNA : MODY3 GENE PRODUCT
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2001-03-30
Release Date:
2002-11-27
Method Details:
Experimental Method:
Resolution:
2.60 Å
R-Value Free:
0.31
R-Value Work:
0.25
R-Value Observed:
0.26
Space Group:
P 41
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:HEPATOCYTE NUCLEAR FACTOR 1-ALPHA
Chain IDs:C (auth: A), D (auth: B)
Chain Length:194
Number of Molecules:2
Biological Source:Homo sapiens
Primary Citation
Diabetes mutations delineate an atypical POU domains in HNF1-Alpha
Mol.Cell 10 1129 1137 (2002)
PMID: 12453420 DOI: 10.1016/S1097-2765(02)00704-9

Abstact

Mutations in Hnf-1alpha are the most common Mendelian cause of diabetes mellitus. To elucidate the molecular function of a mutational hotspot, we cocrystallized human HNF-1alpha 83-279 with a high-affinity promoter and solved the structure of the complex. Two identical protein molecules are bound to the promoter. Each contains a homeodomain and a second domain structurally similar to POU-specific domains that was not predicted on the basis of amino acid sequence. Atypical elements in both domains create a stable interface that further distinguishes HNF-1alpha from other flexible POU-homeodomain proteins. The numerous diabetes-causing mutations in HNF-1alpha thus identified a previously unrecognized POU domain which was used as a search model to identify additional POU domain proteins in sequence databases.

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Primary Citation of related structures