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A cis-element mediating Ultrabithorax autoregulation in the central nervous system
1Zoological Institute, University of Zürich, Switzerland.
Mechanisms of Development
|November 1, 1992
Summary
Researchers identified a control region in Drosophila's Ultrabithorax (Ubx) gene that drives Ubx-like expression. This region contains an element suggesting Ubx autoregulation in the developing central nervous system.
Area of Science:
- Developmental biology
- Genetics
- Molecular biology
Background:
- The Ultrabithorax (Ubx) gene is crucial for embryonic development in Drosophila, controlling segment identity.
- Understanding the regulatory mechanisms of Ubx expression is key to deciphering developmental patterning.
Purpose of the Study:
- To investigate the function of an upstream control region (BXD fragment) of the Drosophila Ultrabithorax (Ubx) gene.
- To identify enhancer elements within the BXD fragment responsible for Ubx expression patterns.
Main Methods:
- Dissection and analysis of the BXD fragment from the Ubx gene.
- Utilizing transgenic embryos to observe beta-galactosidase expression patterns.
- Assessing the dependence of expression patterns on Ubx function.
Main Results:
- The BXD fragment confers a Ubx-like expression pattern in the embryonic ectoderm.
- Several distinct enhancer elements were identified within the BXD fragment.
- The strongest enhancer element mimics Ubx expression in the ventral nerve cord and is dependent on Ubx function.
Conclusions:
- The BXD control region contains a Ubx response element.
- Positive autoregulation of Ubx may occur in the central nervous system of developing Drosophila embryos.