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Inducible preproenkephalin DNA binding proteins in the rat striatum
1HSC T11-060, Departments of Pediatrics, Neurobiology and Behavior, and Cell and Developmental Biology, State University of New York at Stony Brook, Stony Brook, New York 11794-8111, USA.
Molecular and Cellular Neurosciences
|November 17, 2009
Summary
Researchers identified specific nuclear proteins that bind to the rat preproenkephalin (ppEnk) gene. These DNA-protein interactions change during ppEnk gene induction in the brain.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Cellular adaptive responses involve stimulus-secretion-synthesis coupling to genes.
- Gene expression is regulated by signal-transduction pathways and transcription factors.
- Understanding gene regulation in the central nervous system is crucial.
Purpose of the Study:
- To identify striatal nuclear factors binding to the rat preproenkephalin (ppEnk) gene.
- To investigate changes in these DNA-protein interactions upon ppEnk gene induction.
Main Methods:
- DNA footprinting assays were used to map protein binding sites.
- Analysis focused on the 5' regulatory region of the rat ppEnk gene.
- Studies were conducted in the context of primary central nervous system structures.
Main Results:
- Identified binding of Spl-like factors and Jun/Fos family proteins to the ppEnk gene.
- Discovered unique DNA footprints in the ppEnk-induced state within a specific regulatory region (-91 to -175).
- This region overlaps the binding site for the brain-specific transcription factor beta.
Conclusions:
- Specific transcription factors bind to the rat ppEnk gene promoter.
- ppEnk gene induction involves dynamic changes in DNA-protein interactions.
- These findings elucidate gene regulation mechanisms in the complex brain environment.
