1h9u Citations

The structural basis for the specificity of retinoid-X receptor-selective agonists: new insights into the role of helix H12.

J Biol Chem 277 11385-91 (2002)
Cited: 51 times
EuropePMC logo PMID: 11782480

Abstract

Ligands that specifically target retinoid-X receptors (RXRs) are emerging as potentially powerful therapies for cancer, diabetes, and the lowering of circulatory cholesterol. To date, RXR has only been crystallized in the absence of ligand or with the promiscuous ligand 9-cis retinoic acid, which also activates retinoic acid receptors. Here we present the structure of hRXRbeta in complex with the RXR-specific agonist LG100268 (LG268). The structure clearly reveals why LG268 is specific for the RXR ligand binding pocket and will not activate retinoic acid receptors. Intriguingly, in the crystals, the C-terminal "activation" helix (AF-2/helix H12) is trapped in a novel position not seen in other nuclear receptor structures such that it does not cap the ligand binding cavity. Mammalian two-hybrid assays indicate that LG268 is unable to release co-repressors from RXR unless co-activators are also present. Together these findings suggest that RXR ligands may be inefficient at repositioning helix H12.

Reviews - 1h9u mentioned but not cited (1)

  1. The retinoid X receptors and their ligands. Dawson MI, Xia Z. Biochim Biophys Acta 1821 21-56 (2012)

Articles - 1h9u mentioned but not cited (14)

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Reviews citing this publication (4)

  1. Deciphering the nuclear bile acid receptor FXR paradigm. Modica S, Gadaleta RM, Moschetta A. Nucl Recept Signal 8 e005 (2010)
  2. Ligand control of coregulator recruitment to nuclear receptors. Nettles KW, Greene GL. Annu Rev Physiol 67 309-333 (2005)
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  4. Nuclear Receptors as Multiple Regulators of NLRP3 Inflammasome Function. Alatshan A, Benkő S. Front Immunol 12 630569 (2021)

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