CRYSTAL-STRUCTURE OF THE RAR-GAMMA LIGAND-BINDING DOMAIN BOUND TO ALL-TRANS-RETINOIC ACID

被引:986
作者
RENAUD, JP [1 ]
ROCHEL, N [1 ]
RUFF, M [1 ]
VIVAT, V [1 ]
CHAMBON, P [1 ]
GRONEMEYER, H [1 ]
MORAS, D [1 ]
机构
[1] UNIV STRASBOURG 1,COLL FRANCE,CNRS,INSERM,INST GENET & BIOL MOLEC & CELLULAIRE,F-67404 ILLKIRCH GRAFFENS,FRANCE
关键词
D O I
10.1038/378681a0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The 2.0-Angstrom crystal structure of the ligand-binding domain (LED) of the human retinoic acid receptor (RAR)-gamma bound to all-trans retinoic acid reveals the ligand-binding interactions and suggests an electrostatic guidance mechanism. The overall fold is similar to that of the human RXR-alpha apo-LBD, except for the carboxy-terminal part which folds back towards the LED core, contributing to the hydrophobic ligand pocket and 'sealing' its entry site. We propose a 'mouse trap' mechanism whereby a ligand-induced conformational transition repositions the amphipathic alpha-helix of the AF-2 activating domain and forms a transcriptionally active receptor.
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页码:681 / 689
页数:9
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