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Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells
Published on: April 26, 2017
Modelling the compartmentalization of splicing factors
G Carrero1, M J Hendzel, G de Vries
1Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, AB, Canada T6G 2G1.
Journal of Theoretical Biology
|September 16, 2005
Summary
Splicing factor (SF) compartments form through self-organization of dephosphorylated SFs, influenced by phosphorylation cycles and nuclear structure. This aggregation-diffusion model explains speckle formation and modulation.
Area of Science:
- Cell Biology
- Biophysics
- Computational Biology
Background:
- Splicing factor (SF) compartments, or speckles, are nuclear structures enriched in pre-mRNA SFs.
- The precise mechanisms governing SF organization into speckles remain incompletely understood.
Purpose of the Study:
- To develop a mathematical model describing the self-organization of SFs into speckles.
- To investigate the roles of SF dephosphorylation, phosphorylation-dephosphorylation cycles, and underlying nuclear structure in speckle formation.
Main Methods:
- Derivation of a fourth-order aggregation-diffusion model for SF organization.
- Linear stability analysis to study the onset of spatial patterns from self-interaction.
- Bifurcation analysis to explore the influence of phosphorylation and dephosphorylation.
Main Results:
- The model demonstrates how self-interaction among dephosphorylated SFs can lead to spatial pattern formation.
- Phosphorylation and dephosphorylation dynamics were shown to modulate the compartmentalization of SFs.
- The model supports hypotheses involving SF self-organization and the influence of nuclear architecture.
Conclusions:
- A fourth-order aggregation-diffusion model provides a mechanistic explanation for SF speckle formation.
- SF self-organization, regulated by phosphorylation/dephosphorylation, is a key driver of speckle dynamics.
- Underlying nuclear structures likely play a significant role in organizing SFs into functional compartments.
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