PMID- 18250153 OWN - NLM STAT- MEDLINE DCOM- 20080421 LR - 20211020 IS - 1098-5549 (Electronic) IS - 0270-7306 (Print) IS - 0270-7306 (Linking) VI - 28 IP - 8 DP - 2008 Apr TI - Acinus-S' represses retinoic acid receptor (RAR)-regulated gene expression through interaction with the B domains of RARs. PG - 2549-58 LID - 10.1128/MCB.01199-07 [doi] AB - The diverse biological actions of retinoic acid (RA) are mediated by RA receptors (RARs) and retinoid X receptors (RXRs). Modulation of transcription by RARs/RXRs is achieved through two activation functions, ligand-independent AF-1 and ligand-dependent AF-2, located in the A/B and E domains, respectively. While the coregulatory proteins that interact with the E domain are well studied, the A/B domain-interacting partners and their influence(s) on the function of RARs are poorly understood. Acinus-S' is an ubiquitous nuclear protein that has been implicated in inducing apoptotic chromatin condensation and regulating mRNA processing. Our data demonstrate that Acinus-S' can specifically repress ligand-independent and ligand-dependent expression of a DR5 RA response element(RARE)-dependent reporter gene and several endogenous RAR-regulated genes in a dose-dependent and gene-specific manner. Chromatin immunoprecipitation assays show that Acinus-S' associates with RAREs within the promoters of endogenous genes independent of RA treatment. Furthermore, the C-terminal end of Acinus-S' and the B domain of RARbeta interact independently of ligand, and the C-terminal end of Acinus-S' is sufficient for the repression of RAR-regulated gene expression. Finally, histone deacetylase activity only partially accounts for the repressive effect of Acinus-S' on RAR-dependent gene expression. These findings identify Acinus-S' as a novel RAR-interacting protein that regulates the expression of a subset of RAR-regulated genes through direct binding to the N-terminal B domains of RARs. FAU - Vucetic, Zivjena AU - Vucetic Z AD - Department of Biochemistry, Temple University School of Medicine, 3440 N. Broad Street, Philadelphia, PA 19140, USA. FAU - Zhang, Zhenping AU - Zhang Z FAU - Zhao, Jianhua AU - Zhao J FAU - Wang, Fang AU - Wang F FAU - Soprano, Kenneth J AU - Soprano KJ FAU - Soprano, Dianne Robert AU - Soprano DR LA - eng GR - R01 DK044517/DK/NIDDK NIH HHS/United States GR - R01 DK067558/DK/NIDDK NIH HHS/United States GR - DK67558/DK/NIDDK NIH HHS/United States GR - DK44517/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20080204 PL - United States TA - Mol Cell Biol JT - Molecular and cellular biology JID - 8109087 RN - 0 (ACIN1 protein, human) RN - 0 (Histones) RN - 0 (Nuclear Proteins) RN - 0 (Receptors, Retinoic Acid) RN - 9035-51-2 (Cytochrome P-450 Enzyme System) RN - EC 1.14.14.1 (Retinoic Acid 4-Hydroxylase) SB - IM MH - Acetylation MH - Amino Acid Motifs MH - Animals MH - Cell Line MH - Conserved Sequence MH - Cytochrome P-450 Enzyme System/genetics/metabolism MH - *Gene Expression Regulation MH - Histones/metabolism MH - Humans MH - Mice MH - Molecular Sequence Data MH - Nuclear Proteins/genetics/*metabolism MH - Promoter Regions, Genetic/genetics MH - Protein Binding MH - Receptors, Retinoic Acid/chemistry/genetics/*metabolism MH - Retinoic Acid 4-Hydroxylase PMC - PMC2293115 EDAT- 2008/02/06 09:00 MHDA- 2008/04/22 09:00 PMCR- 2008/08/01 CRDT- 2008/02/06 09:00 PHST- 2008/02/06 09:00 [pubmed] PHST- 2008/04/22 09:00 [medline] PHST- 2008/02/06 09:00 [entrez] PHST- 2008/08/01 00:00 [pmc-release] AID - MCB.01199-07 [pii] AID - 1199-07 [pii] AID - 10.1128/MCB.01199-07 [doi] PST - ppublish SO - Mol Cell Biol. 2008 Apr;28(8):2549-58. doi: 10.1128/MCB.01199-07. Epub 2008 Feb 4.