PMID- 21610251 OWN - NLM STAT- MEDLINE DCOM- 20110920 LR - 20211203 IS - 1937-9145 (Electronic) IS - 1937-9145 (Print) IS - 1945-0877 (Linking) VI - 4 IP - 174 DP - 2011 May 24 TI - alpha-catenin is a tumor suppressor that controls cell accumulation by regulating the localization and activity of the transcriptional coactivator Yap1. PG - ra33 LID - 10.1126/scisignal.2001823 [doi] AB - The Hippo pathway regulates contact inhibition of cell proliferation and, ultimately, organ size in diverse multicellular organisms. Inactivation of the Hippo pathway promotes nuclear localization of the transcriptional coactivator Yap1, a Hippo pathway effector, and can cause cancer. Here, we show that deletion of alphaE (alpha epithelial) catenin in the hair follicle stem cell compartment resulted in the development of skin squamous cell carcinoma in mice. Tumor formation was accelerated by simultaneous deletion of alphaE-catenin and the tumor suppressor-encoding gene p53. A small interfering RNA screen revealed a functional connection between alphaE-catenin and Yap1. By interacting with Yap1, alphaE-catenin promoted its cytoplasmic localization, and Yap1 showed constitutive nuclear localization in alphaE-catenin-null cells. We also found an inverse correlation between alphaE-catenin abundance and Yap1 activation in human squamous cell carcinoma tumors. These findings identify alphaE-catenin as a tumor suppressor that inhibits Yap1 activity and sequesters it in the cytoplasm. FAU - Silvis, Mark R AU - Silvis MR AD - Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. FAU - Kreger, Bridget T AU - Kreger BT FAU - Lien, Wen-Hui AU - Lien WH FAU - Klezovitch, Olga AU - Klezovitch O FAU - Rudakova, G Marianna AU - Rudakova GM FAU - Camargo, Fernando D AU - Camargo FD FAU - Lantz, Dan M AU - Lantz DM FAU - Seykora, John T AU - Seykora JT FAU - Vasioukhin, Valeri AU - Vasioukhin V LA - eng GR - R01 AR051380/AR/NIAMS NIH HHS/United States GR - R01 CA098161/CA/NCI NIH HHS/United States GR - R01 CA131047/CA/NCI NIH HHS/United States GR - T32 CA009657/CA/NCI NIH HHS/United States PT - Journal Article DEP - 20110524 PL - United States TA - Sci Signal JT - Science signaling JID - 101465400 RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Cell Cycle Proteins) RN - 0 (Phosphoproteins) RN - 0 (TP53 protein, human) RN - 0 (Transcription Factors) RN - 0 (Tumor Suppressor Protein p53) RN - 0 (YAP-Signaling Proteins) RN - 0 (YAP1 protein, human) RN - 0 (Yap1 protein, mouse) RN - 0 (alpha Catenin) SB - IM MH - Active Transport, Cell Nucleus/genetics MH - Adaptor Proteins, Signal Transducing/genetics/*metabolism MH - Animals MH - Carcinoma, Squamous Cell/genetics/*metabolism/pathology MH - Cell Cycle Proteins MH - Cell Line, Tumor MH - Cell Nucleus/genetics/*metabolism MH - Cell Proliferation MH - HEK293 Cells MH - Humans MH - Mice MH - Mice, Nude MH - Mice, Transgenic MH - Phosphoproteins/genetics/*metabolism MH - Transcription Factors MH - Tumor Suppressor Protein p53/genetics/*metabolism MH - YAP-Signaling Proteins MH - alpha Catenin/genetics/*metabolism PMC - PMC3366274 MID - NIHMS376579 EDAT- 2011/05/26 06:00 MHDA- 2011/09/21 06:00 PMCR- 2012/06/03 CRDT- 2011/05/26 06:00 PHST- 2011/05/26 06:00 [entrez] PHST- 2011/05/26 06:00 [pubmed] PHST- 2011/09/21 06:00 [medline] PHST- 2012/06/03 00:00 [pmc-release] AID - 4/174/ra33 [pii] AID - 10.1126/scisignal.2001823 [doi] PST - epublish SO - Sci Signal. 2011 May 24;4(174):ra33. doi: 10.1126/scisignal.2001823.