6u25
CRYSTAL STRUCTURE OF RAR-RELATED ORPHAN RECEPTOR C (NHIS- RORGT(244-487)-L6-SRC1(678-692)) IN COMPLEX WITH A TRICYCLIC INVERSE AGONIST
Structural highlights
DiseaseNCOA1_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. FunctionRORG_HUMAN Possible nuclear receptor for hydroxycholesterols, the binding of which strongly promotes coactivators recruitment. Essential for thymopoiesis and the development of several secondary lymphoid tissues, including lymph nodes. Involved in lineage specification of uncommitted CD4(+) T-helper cells into Th17 cells. Regulate the expression of several components of the circadian clock.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 PubMedRORgammat is an important nuclear receptor that regulates the production of several pro-inflammatory cytokines such as IL-17 and IL-22. As a result, RORgammat has been identified as a potential target for the treatment of various immunological disorders such as psoriasis, psoriatic arthritis, and inflammatory bowel diseases. Structure and computer-assisted drug design led to the identification of a novel series of tricyclic RORgammat inverse agonists with significantly improved in vitro activity in the reporter (Gal4) and human whole blood assays compared to our previous chemotype. Through careful structure activity relationship, several potent and selective RORgammat inverse agonists have been identified. Pharmacokinetic studies allowed the identification of the lead molecule 32 with a low peak-to-trough ratio. This molecule showed excellent activity in an IL-2/IL-23-induced mouse pharmacodynamic study and demonstrated biologic-like efficacy in an IL-23-induced preclinical model of psoriasis. Rationally Designed, Conformationally Constrained Inverse Agonists of RORgammat-Identification of a Potent, Selective Series with Biologic-Like in Vivo Efficacy.,Marcoux D, Duan JJ, Shi Q, Cherney RJ, Srivastava AS, Cornelius L, Batt DG, Liu Q, Beaudoin-Bertrand M, Weigelt CA, Khandelwal P, Vishwakrishnan S, Selvakumar K, Karmakar A, Gupta AK, Basha M, Ramlingam S, Manjunath N, Vanteru S, Karmakar S, Maddala N, Vetrichelvan M, Gupta A, Rampulla RA, Mathur A, Yip S, Li P, Wu DR, Khan J, Ruzanov M, Sack JS, Wang J, Yarde M, Cvijic ME, Li S, Shuster DJ, Borowski V, Xie JH, McIntyre KW, Obermeier MT, Fura A, Stefanski K, Cornelius G, Hynes J Jr, Tino JA, Macor JE, Salter-Cid L, Denton R, Zhao Q, Carter PH, Dhar TGM J Med Chem. 2019 Oct 31. doi: 10.1021/acs.jmedchem.9b01369. PMID:31638797[8] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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