PMID- 18568018 OWN - NLM STAT- MEDLINE DCOM- 20080804 LR - 20211203 IS - 1476-4679 (Electronic) IS - 1465-7392 (Linking) VI - 10 IP - 7 DP - 2008 Jul TI - TAZ controls Smad nucleocytoplasmic shuttling and regulates human embryonic stem-cell self-renewal. PG - 837-48 LID - 10.1038/ncb1748 [doi] AB - Transforming growth factor-beta (TGFbeta) family members regulate many developmental and pathological events through Smad transcriptional modulators. How nuclear accumulation of Smad is coupled to the transcriptional machinery is poorly understood. Here we demonstrate that in response to TGFbeta stimulation the transcriptional regulator TAZ binds heteromeric Smad2/3-4 complexes and is recruited to TGFbeta response elements. In human embryonic stem cells TAZ is required to maintain self-renewal markers and loss of TAZ leads to inhibition of TGFbeta signalling and differentiation into a neuroectoderm lineage. In the absence of TAZ, Smad2/3-4 complexes fail to accumulate in the nucleus and activate transcription. Furthermore, TAZ, which itself engages in shuttling, dominantly controls Smad nucleocytoplasmic localization and can be retained in the nucleus by transcriptional co-factors such as ARC105, a component of the Mediator complex. TAZ thus defines a hierarchical system regulating Smad nuclear accumulation and coupling to the transcriptional machinery. FAU - Varelas, Xaralabos AU - Varelas X AD - Program in Molecular Biology and Cancer, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, M5G 1X5, Canada. FAU - Sakuma, Rui AU - Sakuma R FAU - Samavarchi-Tehrani, Payman AU - Samavarchi-Tehrani P FAU - Peerani, Raheem AU - Peerani R FAU - Rao, Balaji M AU - Rao BM FAU - Dembowy, Joanna AU - Dembowy J FAU - Yaffe, Michael B AU - Yaffe MB FAU - Zandstra, Peter W AU - Zandstra PW FAU - Wrana, Jeffrey L AU - Wrana JL LA - eng GR - Howard Hughes Medical Institute/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20080622 PL - England TA - Nat Cell Biol JT - Nature cell biology JID - 100890575 RN - 0 (MED15 protein, human) RN - 0 (Mediator Complex) RN - 0 (RNA, Small Interfering) RN - 0 (SMAD2 protein, human) RN - 0 (Smad2 Protein) RN - 0 (Smad3 Protein) RN - 0 (Smad4 Protein) RN - 0 (Transcription Factors) RN - 0 (Transforming Growth Factor beta) RN - EC 2.3.- (Acyltransferases) RN - EC 2.3.1.- (TAFAZZIN protein, human) SB - IM MH - Active Transport, Cell Nucleus/*physiology MH - Acyltransferases MH - Animals MH - Cell Line MH - Cell Nucleus/metabolism MH - Embryonic Stem Cells/cytology/*physiology MH - Genes, Reporter MH - Humans MH - Mediator Complex MH - RNA, Small Interfering/genetics/metabolism MH - Signal Transduction/physiology MH - Smad2 Protein/genetics/*metabolism MH - Smad3 Protein/genetics/*metabolism MH - Smad4 Protein/genetics/*metabolism MH - Transcription Factors/genetics/*metabolism MH - Transcription, Genetic MH - Transforming Growth Factor beta/metabolism EDAT- 2008/06/24 09:00 MHDA- 2008/08/05 09:00 CRDT- 2008/06/24 09:00 PHST- 2008/03/10 00:00 [received] PHST- 2008/05/19 00:00 [accepted] PHST- 2008/06/24 09:00 [pubmed] PHST- 2008/08/05 09:00 [medline] PHST- 2008/06/24 09:00 [entrez] AID - ncb1748 [pii] AID - 10.1038/ncb1748 [doi] PST - ppublish SO - Nat Cell Biol. 2008 Jul;10(7):837-48. doi: 10.1038/ncb1748. Epub 2008 Jun 22.