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Divide and Rule: Phase Separation in Eukaryotic Genome Functioning.

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  • 1Institute of Gene Biology, Russian Academy of Sciences, 119017 Moscow, Russia.

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Summary

Liquid-liquid phase separation (LLPS) drives the formation of cellular structures and regulates gene expression. This process is crucial for organizing chromatin in eukaryotic cells under normal and disease conditions.

Keywords:
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Area of Science:

  • Cell Biology
  • Biophysics
  • Genetics

Background:

  • Cellular functions rely on macromolecule interactions, traditionally attributed to stable protein-DNA/RNA interactions.
  • Weak multivalent interactions and macromolecule condensates are increasingly recognized as key players in cellular organization.
  • Liquid-liquid phase separation (LLPS) is a biophysical process driving the formation of these condensates.

Purpose of the Study:

  • To discuss the role of LLPS in the spatial organization of eukaryotic chromatin.
  • To explore the regulation of gene expression by LLPS in both normal and pathological conditions.

Main Methods:

  • Review of recent advances in understanding macromolecule condensates and LLPS.
  • Discussion of LLPS mechanisms in cellular contexts.
  • Analysis of LLPS involvement in chromatin organization and gene regulation.

Main Results:

  • LLPS is a fundamental process for forming membrane-less organelles (e.g., nucleolus, nuclear bodies).
  • LLPS facilitates the assembly of functional macromolecule aggregates with regulatory, structural, and enzymatic roles.
  • LLPS significantly influences eukaryotic chromatin organization and gene expression.

Conclusions:

  • LLPS is critical for cellular spatial organization and the regulation of gene expression.
  • Understanding LLPS provides insights into cellular mechanisms in both health and disease states.
  • Further research into LLPS is essential for comprehending cellular function and dysfunction.