4dk8
From Proteopedia
Crystal structure of LXR ligand binding domain in complex with partial agonist 5
Structural highlights
Disease[NCOA1_HUMAN] Note=A chromosomal aberration involving NCOA1 is a cause of rhabdomyosarcoma. Translocation t(2;2)(q35;p23) with PAX3 generates the NCOA1-PAX3 oncogene consisting of the N-terminus part of PAX3 and the C-terminus part of NCOA1. The fusion protein acts as a transcriptional activator. Rhabdomyosarcoma is the most common soft tissue carcinoma in childhood, representing 5-8% of all malignancies in children. Function[NR1H2_HUMAN] Orphan receptor. Binds preferentially to double-stranded oligonucleotide direct repeats having the consensus half-site sequence 5'-AGGTCA-3' and 4-nt spacing (DR-4). Regulates cholesterol uptake through MYLIP-dependent ubiquitination of LDLR, VLDLR and LRP8 (By similarity). [NCOA1_HUMAN] Nuclear receptor coactivator that directly binds nuclear receptors and stimulates the transcriptional activities in a hormone-dependent fashion. Involved in the coactivation of different nuclear receptors, such as for steroids (PGR, GR and ER), retinoids (RXRs), thyroid hormone (TRs) and prostanoids (PPARs). Also involved in coactivation mediated by STAT3, STAT5A, STAT5B and STAT6 transcription factors. Displays histone acetyltransferase activity toward H3 and H4; the relevance of such activity remains however unclear. Plays a central role in creating multisubunit coactivator complexes that act via remodeling of chromatin, and possibly acts by participating in both chromatin remodeling and recruitment of general transcription factors. Required with NCOA2 to control energy balance between white and brown adipose tissues. Required for mediating steroid hormone response. Isoform 2 has a higher thyroid hormone-dependent transactivation activity than isoform 1 and isoform 3.[1] [2] [3] [4] [5] [6] [7] Publication Abstract from PubMedStructural modification of a series of dual LXRalpha/beta agonists led to the identification of a new class of LXRbeta partial agonists. An X-ray co-crystal structure shows that a representative member of this series, pyrrole 5, binds to LXRbeta with a reversed orientation compared to 1. Discovery of a new binding mode for a series of liver X receptor agonists.,Kopecky DJ, Jiao XY, Fisher B, McKendry S, Labelle M, Piper DE, Coward P, Shiau AK, Escaron P, Danao J, Chai A, Jaen J, Kayser F Bioorg Med Chem Lett. 2012 Apr 1;22(7):2407-10. Epub 2012 Feb 20. PMID:22406115[8] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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