PUBLICATION
Regulation of dharma/bozozok by the Wnt Pathway
- Authors
- Ryu, S.-L., Fujii, R., Yamanaka, Y., Shimizu, T., Yabe, T., Hirata, T., Hibi, M., and Hirano, T.
- ID
- ZDB-PUB-010306-9
- Date
- 2001
- Source
- Developmental Biology 231(2): 397-409 (Journal)
- Registered Authors
- Fujii, Ritsuko, Hibi, Masahiko, Hirata, Tsutomu, Ryu, Seung-Lim, Shimizu, Takashi, Yabe, Taijirou, Yamanaka, Yojiro
- Keywords
- dharma; bozozok; Wnt signal; Nieuwkoop center; ß-catenin; Tcf; Lef
- MeSH Terms
-
- Signal Transduction
- Wnt Proteins
- Lymphoid Enhancer-Binding Factor 1
- Binding Sites
- Genes, Reporter
- Base Sequence
- Down-Regulation
- Time Factors
- Cytoplasm/metabolism
- Cytoskeletal Proteins/metabolism
- TCF Transcription Factors
- DNA Primers/metabolism
- RNA, Messenger/metabolism
- Transcription Factors/genetics
- Transcription Factors/metabolism
- Molecular Sequence Data
- beta Catenin
- Luciferases/metabolism
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism*
- Plasmids/metabolism
- Nodal Protein
- RNA/metabolism
- Zebrafish
- Luminescent Proteins/metabolism
- Gene Library
- Transforming Growth Factor beta/metabolism
- Green Fluorescent Proteins
- Genes, Dominant
- Transcription Factor 7-Like 1 Protein
- Trans-Activators*
- Up-Regulation
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/physiology*
- DNA, Complementary/metabolism
- Promoter Regions, Genetic
- Zebrafish Proteins*
- In Situ Hybridization
- HMGB Proteins*
- Animals
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Mutagenesis, Site-Directed
- DNA/metabolism
- PubMed
- 11237468 Full text @ Dev. Biol.
Citation
Ryu, S.-L., Fujii, R., Yamanaka, Y., Shimizu, T., Yabe, T., Hirata, T., Hibi, M., and Hirano, T. (2001) Regulation of dharma/bozozok by the Wnt Pathway. Developmental Biology. 231(2):397-409.
Abstract
The zebrafish homeobox gene dharma/bozozok (boz) is required for the formation and/or function of the Nieuwkoop center and the subsequent induction of the Spemann organizer. dharma is expressed soon after the midblastula transition in the dorsal blastomeres and the dorsal yolk syncytial layer (YSL). We found that the expression of dharma was upregulated or ectopically induced by misexpression of a Wnt protein and cytoplasmic components of the Wnt signaling pathway and downregulated by the expression of dominant-negative Tcf3. A 1.4-kbp fragment of the dharma promoter region contains consensus sequences for Tcf/Lef binding sites. This promoter region recapitulated the Wnt-dependent and dorsal dharma expression pattern when it was fused to luciferase or GFP. Deletion and point mutant analyses revealed that the Tcf/Lef binding sites were required to drive this expression pattern. These data established that dharma/boz functions between the dorsal determinants-mediated Wnt signals and the formation of the Nieuwkoop center.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping