Abstract:
:The crystal structure of the ligand-binding domain of RARbeta, a suspect tumour suppressor, reveals important features that distinguish it from the two other RAR isotypes. The most striking difference is an extra cavity allowing RARbeta to bind more bulky agonists. Accordingly, we identified a ligand that shows RARbeta selectivity with a 100-fold higher affinity to RARbeta than to alpha or gamma isotypes. The structural differences between the three RAR ligand-binding pockets revealed a rationale explaining how a single retinoid can be at the same time an RARalpha, gamma antagonist and an RARbeta agonist. In addition, we demonstrate how to generate an RARbeta antagonist by gradually modifying the bulkiness of a single substitution. Together, our results provide structural guidelines for the synthesis of RARbeta-selective agonists and antagonists, allowing for the first time to address pharmacologically the tumour suppressor role of RARbeta in vitro and in animal models.
journal_name
EMBO Repjournal_title
EMBO reportsauthors
Germain P,Kammerer S,Pérez E,Peluso-Iltis C,Tortolani D,Zusi FC,Starrett J,Lapointe P,Daris JP,Marinier A,de Lera AR,Rochel N,Gronemeyer Hdoi
10.1038/sj.embor.7400235keywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
877-82issue
9eissn
1469-221Xissn
1469-3178pii
7400235journal_volume
5pub_type
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