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SOX7 transcription factor: sequence, chromosomal localisation, expression, transactivation and interference with Wnt
W Takash1, J Cañizares, N Bonneaud
1Human Molecular Genetics Group, Institut de Génétique Humaine, UPR1142 CNRS, 141 rue de la Cardonille, 34396 Montpellier Cedex 5, France.
Nucleic Acids Research
|November 3, 2001
Summary
The SOX7 gene, a transcription factor, plays a key role in development. It regulates gene expression and can repress Wnt signaling, impacting cellular processes.
Area of Science:
- Genetics
- Developmental Biology
- Molecular Biology
Background:
- The Sox gene family encodes transcription factors with a DNA-binding HMG box.
- SOX proteins regulate crucial developmental processes across the animal kingdom.
- SOX7 shares sequence similarity with the testis-determining protein SRY.
Purpose of the Study:
- To characterize the human SOX7 gene and compare it with its mouse orthologue.
- To investigate the expression patterns and functional roles of SOX7.
- To explore SOX7's interaction with Wnt/beta-catenin signaling.
Main Methods:
- Chromosomal mapping to determine gene location in humans and mice.
- Detailed mRNA expression analysis during embryonic development.
- Functional assays to assess the transactivation domain and Wnt signaling inhibition.
Main Results:
- Mouse Sox7 mapped to chromosome 14D; human SOX7 mapped to chromosome 8p22.
- Sox7 mRNA was detected in multiple embryonic tissues, notably brain, heart, and kidney.
- SOX7 protein possesses a transactivation domain and significantly reduces Wnt/beta-catenin-stimulated transcription.
Conclusions:
- SOX7 is a conserved gene with critical roles in embryonic development.
- SOX7 expression patterns suggest involvement in tissue-specific differentiation.
- SOX7 acts as a transcriptional repressor, notably inhibiting Wnt signaling pathways.