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ZFIN ID: ZDB-PUB-070601-1
Tob1 controls dorsal development of zebrafish embryos by antagonizing maternal beta-catenin transcriptional activity
Xiong, B., Rui, Y., Zhang, M., Shi, K., Jia, S., Tian, T., Yin, K., Huang, H., Lin, S., Zhao, X., Chen, Y., Chen, Y.G., Lin, S.C., and Meng, A.
Date: 2006
Source: Developmental Cell   11(2): 225-238 (Journal)
Registered Authors: Huang, Huizhe, Jia, Shunji, Meng, Anming, Shi, Kehui, Tian, Tian, Xiong, Bo, Zhang, Min
Keywords: none
MeSH Terms:
  • Animals
  • Embryo, Nonmammalian/embryology
  • Embryo, Nonmammalian/metabolism
  • Protein Binding/drug effects
  • Protein Binding/physiology
  • Signal Transduction/drug effects
  • Signal Transduction/physiology
  • Smad3 Protein/antagonists & inhibitors
  • Smad3 Protein/metabolism
  • Spinal Nerve Roots/drug effects*
  • Spinal Nerve Roots/growth & development*
  • Spinal Nerve Roots/physiology
  • Transcription, Genetic/drug effects*
  • Transforming Growth Factor beta/antagonists & inhibitors
  • Transforming Growth Factor beta/metabolism
  • Zebrafish/embryology*
  • Zebrafish Proteins/pharmacology
  • Zebrafish Proteins/physiology*
  • beta Catenin/antagonists & inhibitors*
  • beta Catenin/genetics
  • beta Catenin/physiology
PubMed: 16890162 Full text @ Dev. Cell
Maternal beta-catenin and Nodal signals are essential for the formation of the dorsal organizer, which, in turn, induces neural and other dorsal tissue development in vertebrate embryos. Tob (Transducer of ErbB2) proteins possess antiproliferative properties and are known to influence BMP signaling, but their relationship to other signaling pathways and to embryonic patterning in general was unclear. In this study, we demonstrate that zebrafish tob1a is required for correct dorsoventral patterning. Mechanistically, Tob1a inhibits beta-catenin transcriptional activity by physically associating with beta-catenin and preventing the formation of beta-catenin/LEF1 complexes. Although Tob1a can also inhibit the transcriptional activity of the Nodal effector Smad3, its role in limiting dorsal development is executed primarily by antagonizing the beta-catenin signal. We further demonstrate that Tob family members across species share similar biochemical properties and biological activities.