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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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Quantitative Comparison of cis-Regulatory Element CRE Activities in Transgenic Drosophila melanogaster

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Multiple conserved regulatory elements with overlapping functions determine Sox10 expression in mouse embryogenesis.

Torsten Werner¹, Alexander Hammer, Mandy Wahlbuhl

¹Institut für Biochemie, Emil-Fischer-Zentrum, Universität Erlangen-Nürnberg, Erlangen and Max-Planck-Institut für Neurobiologie, Martinsried, Germany.

Nucleic Acids Research

|September 28, 2007

Summary

Researchers identified five regulatory regions that control Sox10 gene expression during embryonic development. These enhancers direct expression in neural crest cells and oligodendrocytes, ensuring robust Sox10 activity.

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A Reverse Genetic Approach to Test Functional Redundancy During Embryogenesis

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Published on: August 11, 2010

Area of Science:

Developmental Biology
Genetics
Neuroscience

Background:

Sox10 transcription factor is crucial for neural crest cell development and oligodendrocyte differentiation.
Understanding Sox10 gene regulation is key to comprehending these developmental processes.

Purpose of the Study:

To identify and characterize regulatory elements controlling Sox10 expression during embryonic development.
To investigate the function of evolutionary conserved non-coding sequences in the Sox10 genomic region as enhancers.

Main Methods:

Analysis of evolutionary conserved non-coding sequences in the Sox10 genomic region.
Linking sequences to a beta-galactosidase marker gene and minimal promoter.
Generating transgenic mice to assess enhancer activity and expression patterns.

Main Results:

Five novel regulatory regions were identified as functional enhancers of the Sox10 gene.
These enhancers direct marker gene expression in Sox10-expressing cell types, including the otic vesicle, oligodendrocytes, and neural crest derivatives.
Enhancers exhibit overlapping activities and shared binding sites for key transcription factors (Sox, Lef/Tcf, Pax, AP2).

Conclusions:

Identified enhancers play a significant role in mediating Sox10 expression in specific tissues and cell types during development.
The identified regulatory network contributes to the high-level and robust expression of Sox10.
These findings provide insights into the transcriptional control of Sox10 and its importance in development.