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The CRE-binding protein dCREB-A is required for Drosophila embryonic development
R E Rose1, N M Gallaher, D J Andrew
1Vollum Institute, Oregon Health Sciences University, Portland 97201, USA.
Genetics
|June 1, 1997
Summary
The Drosophila cyclic AMP response-element (CRE)-binding protein, dCREB-A, is essential for embryogenesis. Null mutations result in embryonic lethality, highlighting its critical role in development.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- dCREB-A is a Drosophila homolog of the mammalian CREB protein.
- It belongs to the bZIP transcription factor family and binds to CRE sequences.
- dCREB-A activates transcription in cell culture.
Purpose of the Study:
- To characterize the gene structure of dCREB-A.
- To investigate dCREB-A protein expression patterns during Drosophila development.
- To determine the essential role of dCREB-A in embryogenesis.
Main Methods:
- Gene structure analysis (exons, DNA distribution, start sites).
- Protein expression analysis using anti-dCREB-A antibodies.
- Generation and analysis of null mutations in the dCREB-A gene.
Main Results:
- The dCREB-A gene spans 21 kb and is encoded in six exons.
- dCREB-A protein is localized in nuclei of specific embryonic tissues (salivary gland, proventriculus, stomadeum, tracheal cells) and adult ovaries.
- Null mutants of dCREB-A exhibit lethality late in embryogenesis.
Conclusions:
- dCREB-A is indispensable for Drosophila embryogenesis.
- This CRE-binding protein has a nonredundant developmental function.
- dCREB-A is a valuable tool for studying signal transduction in development.