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spinqualitylabelsall models PDB ID 1dkf Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image
, resolution 2.50Å
Ligands:	and
Coordinates:	save as pdb, mmCIF, xml

CRYSTAL STRUCTURE OF A HETERODIMERIC COMPLEX OF RAR AND RXR LIGAND-BINDING DOMAINS

Contents 1 Overview 2 Disease 3 About this Structure 4 Reference

Overview

The crystal structure of a heterodimer between the ligand-binding domains (LBDs) of the human RARalpha bound to a selective antagonist and the constitutively active mouse RXRalphaF318A mutant shows that, pushed by a bulky extension of the ligand, RARalpha helix H12 adopts an antagonist position. The unexpected presence of a fatty acid in the ligand-binding pocket of RXRalpha(F318A is likely to account for its apparent "constitutivity." Specific conformational changes suggest the structural basis of pure and partial antagonism. The RAR-RXR heterodimer interface is similar to that observed in most nuclear receptor (NR) homodimers. A correlative analysis of 3D structures and sequences provides a novel view on dimerization among members of the nuclear receptor superfamily.

Disease

Known disease associated with this structure: Leukemia, acute promyelocytic OMIM:[180240]

About this Structure

1DKF is a Protein complex structure of sequences from Homo sapiens and Mus musculus. Full crystallographic information is available from OCA.

Reference

Crystal structure of a heterodimeric complex of RAR and RXR ligand-binding domains., Bourguet W, Vivat V, Wurtz JM, Chambon P, Gronemeyer H, Moras D, Mol Cell. 2000 Feb;5(2):289-98. PMID:10882070

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