4DQM

Revealing a marine natural product as a novel agonist for retinoic acid receptors with a unique binding mode and antitumor activity

Summary for 4DQM

• Entry DOI: 10.2210/pdb4dqm/pdb
• Descriptor: Retinoic acid receptor alpha, Nuclear receptor coactivator 1, (5S)-4-[(3E,7E)-4,8-dimethyl-10-(2,6,6-trimethylcyclohex-1-en-1-yl)deca-3,7-dien-1-yl]-5-hydroxyfuran-2(5H)-one, ... (4 entities in total)
• Functional Keywords: nuclear receptor transcription factor, ligand binding domain, transcription regulation, nucleus, transcription-transferase complex, transcription/transferase
• Biological source: Homo sapiens (human); More
• Cellular location: Nucleus: P10276 Q15788
• Total number of polymer chains: 4
• Total formula weight: 56091.71

Authors

Wang, S.,Wang, Z.,Lin, S.,Zheng, W.,Wang, R.,Jin, S.,Chen, J.,Jin, L.,Li, Y. (deposition date: 2012-02-16, release date: 2012-10-03, Last modification date: 2017-11-15)

Primary citation

Wang, S.,Wang, Z.,Lin, S.,Zheng, W.,Wang, R.,Jin, S.,Chen, J.,Jin, L.,Li, Y.
Revealing a natural marine product as a novel agonist for retinoic acid receptors with a unique binding mode and inhibitory effects on cancer cells.
Biochem.J., 446:79-87, 2012

PubMed Abstract: Retinoids display anti-tumour activity on various cancer cells and therefore have been used as important therapeutic agents. However, adverse side effects and RA (retinoic acid) resistance limit further development and clinical application of retinoid-based therapeutic agents. We report in the present paper the identification of a natural marine product that activates RARs (RA receptors) with a chemical structure distinct from retinoids by high-throughput compound library screening. Luffariellolide was uncovered as a novel RAR agonist by inducing co-activator binding to these receptors in vitro, further inhibiting cell growth and regulating RAR target genes in various cancer cells. Structural and molecular studies unravelled a unique binding mode of this natural ligand to RARs with an unexpected covalent modification on the RAR. Functional characterization further revealed that luffariellolide displays chemotherapeutic potentials for overcoming RA resistance in colon cancer cells, suggesting that luffariellolide may represent a unique template for designing novel non-retinoid compounds with advantages over current RA drugs.

PubMed: 22642567
DOI: 10.1042/BJ20120726

Experimental method

X-RAY DIFFRACTION (2.75 Å)