PMID- 21839727 OWN - NLM STAT- MEDLINE DCOM- 20111121 LR - 20110905 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 412 IP - 3 DP - 2011 Sep 2 TI - A novel inhibitor of apoptosis protein (IAP)-interacting protein, Vestigial-like (Vgl)-4, counteracts apoptosis-inhibitory function of IAPs by nuclear sequestration. PG - 454-9 LID - 10.1016/j.bbrc.2011.07.117 [doi] AB - The inhibitors of apoptosis proteins (IAP), which include cIAP1, cIAP2 and XIAP, suppress apoptosis through the inhibition of caspases, and the activity of IAPs is regulated by a variety of IAP-binding proteins. Herein, we report the identification of a Vestigial-like 4 (Vgl-4), which functions as a transcription cofactor in cardiac myocytes, as a new IAP binding protein. Vgl-4 is expressed predominantly in the nucleus and its overexpression triggers a relocalization of IAPs from the cytoplasm to the nucleus. cIAP1/2-interacting protein TRAF2 (TNF receptor-associated factor 2) prevented the Vgl-4-driven nuclear localization of cIAP2. Accordingly, the forced relocation of IAPs to the nucleus by Vgl-4 significantly reduced their ability to prevent Bax- and TNFalpha-induced apoptosis, which can be recovered by co-expression with TRAF2. Our results suggest that Vgl-4 may play a role in the apoptotic pathways by regulating translocation of IAPs between different cell compartments. CI - Copyright (c) 2011 Elsevier Inc. All rights reserved. FAU - Jin, Hyung-Seung AU - Jin HS AD - Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemoon-gu, Seoul 120-749, Republic of Korea. FAU - Park, Hyung-Sun AU - Park HS FAU - Shin, Jun-Ha AU - Shin JH FAU - Kim, Dong-Hwan AU - Kim DH FAU - Jun, Sung-Hun AU - Jun SH FAU - Lee, Chang-Jun AU - Lee CJ FAU - Lee, Tae H AU - Lee TH LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110804 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Inhibitor of Apoptosis Proteins) RN - 0 (TNF Receptor-Associated Factor 2) RN - 0 (Transcription Factors) RN - 0 (VGLL4 protein, human) RN - 0 (X-Linked Inhibitor of Apoptosis Protein) SB - IM MH - Active Transport, Cell Nucleus MH - *Apoptosis MH - Cell Nucleus/*metabolism MH - HEK293 Cells MH - HeLa Cells MH - Humans MH - Inhibitor of Apoptosis Proteins/*metabolism MH - TNF Receptor-Associated Factor 2/metabolism MH - Transcription Factors/*metabolism MH - X-Linked Inhibitor of Apoptosis Protein EDAT- 2011/08/16 06:00 MHDA- 2011/12/13 00:00 CRDT- 2011/08/16 06:00 PHST- 2011/07/22 00:00 [received] PHST- 2011/07/27 00:00 [accepted] PHST- 2011/08/16 06:00 [entrez] PHST- 2011/08/16 06:00 [pubmed] PHST- 2011/12/13 00:00 [medline] AID - S0006-291X(11)01361-1 [pii] AID - 10.1016/j.bbrc.2011.07.117 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2011 Sep 2;412(3):454-9. doi: 10.1016/j.bbrc.2011.07.117. Epub 2011 Aug 4.