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Related Experiment Video

Updated: Jun 16, 2025

Nuclear Migration in the Drosophila Oocyte

Nuclear Migration in the Drosophila Oocyte

Published on: May 13, 2021

Mechanisms for controlling Dorsal nuclear levels.

James McGehee¹, Angelike Stathopoulos¹

¹California Institute of Technology, Division of Biology and Biological Engineering, Pasadena, CA, United States.

Frontiers in Cell and Developmental Biology

|August 20, 2024

Summary

The Dorsal gradient in Drosophila embryos is crucial for development. Mechanisms beyond Toll signaling, like post-translational modification, regulate Dorsal levels for proper gene expression and embryo viability.

Keywords:

Dorsal transcription factor Drosophila melanogaster nuclear import and export nuclear spacing phosphorylation post-translational modification shuttling sumoylation

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Last Updated: Jun 16, 2025

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Affinity-based Isolation of Tagged Nuclei from Drosophila Tissues for Gene Expression Analysis

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Published on: March 25, 2014

Area of Science:

Developmental Biology
Molecular Biology
Genetics

Background:

The Dorsal gradient is essential for establishing the dorsal-ventral axis in Drosophila embryogenesis.
Proper dorsal-ventral patterning is critical for forming tissues vital for embryo survival.

Purpose of the Study:

To explore mechanisms regulating Dorsal nuclear levels beyond Toll signaling.
To understand how graded inputs influence developmental patterning and gene expression.

Main Methods:

Review of existing literature on Dorsal gradient formation.
Analysis of potential regulatory mechanisms: post-translational modification, shuttling, and nuclear spacing.

Main Results:

Toll signaling is necessary but not sufficient for Dorsal gradient formation.
Post-translational modification, Cactus-mediated shuttling, and nuclear spacing are proposed mechanisms.
These mechanisms fine-tune nuclear Dorsal levels for precise gene expression.

Conclusions:

Multiple mechanisms contribute to establishing precise Dorsal nuclear gradients.
Understanding Dorsal gradient regulation provides insights into developmental patterning.
Regulation of nuclear import timing impacts gene expression during the maternal-to-zygotic transition.