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Posterior–anterior gradient of zebrafish hes6 expression in the presomitic mesoderm is established by the combinatorial functions of the downstream enhancer and 3′UTR
- Source :
- Developmental Biology. 409(2):543-554
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- In vertebrates, the periodic formation of somites from the presomitic mesoderm (PSM) is driven by the molecular oscillator known as the segmentation clock. The hairy-related gene, hes6/her13.2, functions as a hub by dimerizing with other oscillators of the segmentation clock in zebrafish embryos. Although hes6 exhibits a posterior–anterior expression gradient in the posterior PSM with a peak at the tailbud, the detailed mechanisms underlying this unique expression pattern have not yet been clarified. By establishing several transgenic lines, we found that the transcriptional regulatory region downstream of hes6 in combination with the hes6 3′UTR recapitulates the endogenous gradient of hes6 mRNA expression. This downstream region, which we termed the PT enhancer, possessed several putative binding sites for the T-box and Ets transcription factors that were required for the regulatory activity. Indeed, the T-box transcription factor (Tbx16) and Ets transcription factor (Pea3) bound specifically to the putative binding sites and regulated the enhancer activity in zebrafish embryos. In addition, the 3′UTR of hes6 is required for recapitulation of the endogenous mRNA expression. Furthermore, the PT enhancer with the 3′UTR of hes6 responded to the inhibition of retinoic acid synthesis and fibroblast growth factor signaling in a manner similar to endogenous hes6. The results showed that transcriptional regulation by the T-box and Ets transcription factors, combined with the mRNA stability given by the 3′UTR, is responsible for the unique expression gradient of hes6 mRNA in the posterior PSM of zebrafish embryos.
- Subjects :
- 0301 basic medicine
Tail
Mesoderm
Embryo, Nonmammalian
Green Fluorescent Proteins
Molecular Sequence Data
Tretinoin
3′UTR
Biology
Animals, Genetically Modified
03 medical and health sciences
Expression gradient
Transcriptional regulation
Genes, Reporter
medicine
Paraxial mesoderm
Basic Helix-Loop-Helix Transcription Factors
Animals
Somite
RNA, Messenger
Downstream Enhancer
Enhancer
Zebrafish
Transcription factor
3' Untranslated Regions
Molecular Biology
Body Patterning
Binding Sites
Base Sequence
ETS transcription factor family
Gene Expression Regulation, Developmental
Cell Biology
Zebrafish Proteins
biology.organism_classification
Molecular biology
Fibroblast Growth Factors
Repressor Proteins
030104 developmental biology
medicine.anatomical_structure
Enhancer Elements, Genetic
Hairy-related gene
Somites
Protein Binding
Signal Transduction
Developmental Biology
Subjects
Details
- ISSN :
- 00121606
- Volume :
- 409
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Developmental Biology
- Accession number :
- edsair.doi.dedup.....67eb1fea0bb600ecdc1a15bb175822ce
- Full Text :
- https://doi.org/10.1016/j.ydbio.2015.11.010