PMID- 14645241 OWN - NLM STAT- MEDLINE DCOM- 20040430 LR - 20210206 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 279 IP - 8 DP - 2004 Feb 20 TI - Interactions between activating signal cointegrator-2 and the tumor suppressor retinoblastoma in androgen receptor transactivation. PG - 7131-5 AB - Activating signal cointegrator-2 (ASC-2), a cancer-amplified transcription coactivator of nuclear receptors and numerous other transcription factors, was previously shown to contain two LXXLL motifs, each of which interacts with a distinct set of nuclear receptors. In this work, we showed that ASC-2 has an indirect, separate binding site for androgen receptor (AR). Interestingly, this region overlapped with the direct interaction interfaces with the tumor suppressor retinoblastoma (Rb). Although ASC-2 alone stimulated AR transactivation in cotransfections of HeLa cells, ectopic expression of Rb effected ASC-2 to act as a transcription coactivator of AR in Rb-null Saos2 cells. These results, along with the previous report in which AR was shown to directly interact with Rb (Yeh, S., Miyamoto, H., Nishimura, K., Kang, H., Ludlow, J., Hsiao, P., Wang, C., Su, C., and Chang C. (1998) Biochem. Biophys. Res. Commun. 248, 361-367), suggest that the AR-ASC-2 interactions in vivo may involve Rb. Thus, ASC-2 appears to contain at least three distinct nuclear receptor interaction domains. FAU - Goo, Young-Hwa AU - Goo YH AD - Division of Diabetes, Endocrinology & Metabolism, Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA. FAU - Na, Soon-Young AU - Na SY FAU - Zhang, Hao AU - Zhang H FAU - Xu, Jianming AU - Xu J FAU - Hong, SunHwa AU - Hong S FAU - Cheong, JaeHun AU - Cheong J FAU - Lee, Soo-Kyung AU - Lee SK FAU - Lee, Jae Woon AU - Lee JW LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20031125 PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Chromatin) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Luminescent Proteins) RN - 0 (NCOA6 protein, human) RN - 0 (Nuclear Receptor Coactivators) RN - 0 (Receptors, Androgen) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Retinoblastoma Protein) RN - 0 (Transcription Factors) RN - 147336-22-9 (Green Fluorescent Proteins) RN - EC 2.5.1.18 (Glutathione Transferase) SB - IM MH - Amino Acid Motifs MH - Animals MH - Chromatin/metabolism MH - Fibroblasts/metabolism MH - Glutathione Transferase/metabolism MH - Green Fluorescent Proteins MH - HeLa Cells MH - Humans MH - Immunohistochemistry MH - *Intracellular Signaling Peptides and Proteins MH - Luminescent Proteins/metabolism MH - Nuclear Receptor Coactivators MH - Plasmids/metabolism MH - Precipitin Tests MH - Protein Binding MH - Protein Structure, Tertiary MH - Receptors, Androgen/genetics/*metabolism MH - Recombinant Fusion Proteins/metabolism MH - Retinoblastoma Protein/*metabolism MH - Signal Transduction MH - Transcription Factors/*metabolism MH - *Transcriptional Activation EDAT- 2003/12/03 05:00 MHDA- 2004/05/01 05:00 CRDT- 2003/12/03 05:00 PHST- 2003/12/03 05:00 [pubmed] PHST- 2004/05/01 05:00 [medline] PHST- 2003/12/03 05:00 [entrez] AID - S0021-9258(18)44677-7 [pii] AID - 10.1074/jbc.M312563200 [doi] PST - ppublish SO - J Biol Chem. 2004 Feb 20;279(8):7131-5. doi: 10.1074/jbc.M312563200. Epub 2003 Nov 25.