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Published on: January 11, 2017
Direct membrane protein-DNA interactions required early in nuclear envelope assembly
Sebastian Ulbert1, Melpomeni Platani, Stephanie Boue
1European Molecular Biology Laboratory, 69117 Heidelberg, Germany.
The Journal of Cell Biology
|May 24, 2006
Summary
Nuclear envelope assembly involves early interactions between chromatin and membranes. Transmembrane nuclear envelope proteins directly bind DNA, facilitating crucial early steps in nuclear envelope formation.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Nuclear envelope (NE) assembly is a critical process following cell division.
- Initial NE formation involves interactions between chromatin and membrane components.
- Integral NE proteins are hypothesized to mediate membrane recruitment to chromatin.
Purpose of the Study:
- To investigate the direct interactions between nuclear envelope proteins and chromatin.
- To elucidate the role of these interactions in the early stages of NE assembly.
Main Methods:
- Direct binding assays of transmembrane NE proteins to DNA.
- Analysis of protein domains within NE membrane proteins for DNA-binding potential.
- Testing the binding of essential NE membrane fractions to protein-free DNA.
Main Results:
- Several transmembrane NE proteins were found to directly bind DNA.
- NE membrane proteins exhibit enriched long, basic domains, suggesting DNA-binding capacity.
- Essential membrane fractions for NE formation demonstrated direct binding to protein-free DNA.
Conclusions:
- Direct interaction between transmembrane NE proteins and DNA is a key event in NE assembly.
- Specific protein-DNA interactions are critical for the initial recruitment of membranes during NE formation.
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