PMID- 15698540 OWN - NLM STAT- MEDLINE DCOM- 20050408 LR - 20191210 IS - 0960-0760 (Print) IS - 0960-0760 (Linking) VI - 92 IP - 5 DP - 2004 Dec TI - FLASH interacts with p160 coactivator subtypes and differentially suppresses transcriptional activity of steroid hormone receptors. PG - 357-63 AB - We previously reported that tumor necrosis factor alpha receptor- and Fas-associated FLASH interacts with one of the p160 nuclear receptor coactivators, glucocorticoid receptor-interacting protein (GRIP) 1, at its nuclear receptor-binding (NRB) domain, and that inhibits the transcriptional activity of the glucocorticoid receptor (GR) by interfering with association of GR and GRIP1. Here, we further examined the specificity of FLASH suppressive effect and the physical/functional interactions between this protein and two other p160 family subtypes. The suppressive effect of FLASH on GR transactivation was observed in several cell lines and on the chromatin-integrated mouse mammary tumor virus (MMTV) promoter. FLASH strongly interacted with the NRB domain of the thyroid hormone receptor activator molecule (TRAM) 1, a member of the steroid hormone receptor coactivator (SRC) 3/nuclear receptor coactivator (N-CoA) 3 subtypes, as well as with SRC2/N-CoA2 p160 coactivator GRIP1, while its interaction with SRC1a, one of the SRC1/N-CoA1 proteins, was faint in yeast two-hybrid assays. Accordingly, FLASH strongly suppressed TRAM1- and GRIP1-induced enhancement of GR-stimulated transactivation of the MMTV promoter in HCT116 cells, while it did not affect SRC1a-induced potentiation of transcription. Furthermore, FLASH suppressed androgen- and progesterone receptor-induced transcriptional activity, but did not influence estrogen receptor-induced transactivation, possibly due to their preferential use of p160 coactivators in HCT116 and HeLa cells. Thus, FLASH differentially suppresses steroid hormone receptor-induced transcriptional activity by interfering with their association with SRC2/N-CoA2 and SRC3/N-CoA3 but not with SRC1/N-CoA1. FAU - Kino, Tomoshige AU - Kino T AD - Pediatric and Reproductive Endocrinology Branch, National Institute of Child Health and Human Development, Building 10, Clinical Research Center, Room 1-3140 , 10 Center Drive, MSC 1109, Bethesda, MD 20892-1109, USA. kinot@mail.nih.gov FAU - Ichijo, Takamasa AU - Ichijo T FAU - Chrousos, George P AU - Chrousos GP LA - eng PT - Journal Article DEP - 20041219 PL - England TA - J Steroid Biochem Mol Biol JT - The Journal of steroid biochemistry and molecular biology JID - 9015483 RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (CASP8AP2 protein, human) RN - 0 (Calcium-Binding Proteins) RN - 0 (NCOA2 protein, human) RN - 0 (Nuclear Receptor Coactivator 2) RN - 0 (Receptors, Steroid) RN - 0 (Transcription Factors) SB - IM MH - Animals MH - Apoptosis Regulatory Proteins MH - Calcium-Binding Proteins/genetics/*metabolism MH - Cell Line MH - Chlorocebus aethiops MH - Humans MH - Nuclear Receptor Coactivator 2 MH - Protein Binding MH - Receptors, Steroid/*antagonists & inhibitors/genetics/*metabolism MH - Transcription Factors/*classification/*metabolism MH - Transcription, Genetic/*genetics MH - Transcriptional Activation/genetics EDAT- 2005/02/09 09:00 MHDA- 2005/04/09 09:00 CRDT- 2005/02/09 09:00 PHST- 2003/10/08 00:00 [received] PHST- 2004/09/09 00:00 [accepted] PHST- 2005/02/09 09:00 [pubmed] PHST- 2005/04/09 09:00 [medline] PHST- 2005/02/09 09:00 [entrez] AID - S0960-0760(04)00374-7 [pii] AID - 10.1016/j.jsbmb.2004.09.003 [doi] PST - ppublish SO - J Steroid Biochem Mol Biol. 2004 Dec;92(5):357-63. doi: 10.1016/j.jsbmb.2004.09.003. Epub 2004 Dec 19.