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Related Concept Videos

Micelles01:30

Micelles

Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...

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Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
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Micelle-like clusters in phase-separated Nanog condensates: A molecular simulation study.

Azuki Mizutani1, Cheng Tan2, Yuji Sugita2,3,4

  • 1Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto, Japan.

Plos Computational Biology
|July 24, 2023
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Summary

Master transcription factor Nanog forms dynamic, liquid-like micelle clusters crucial for gene regulation. Disrupting these Nanog condensates impacts their function and DNA interactions.

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Area of Science:

  • Molecular Biology
  • Biophysics
  • Genetics

Background:

  • Transcription factors (TFs) form biomolecular condensates regulating gene expression.
  • Structural details of these condensates, particularly for Nanog, remain unclear.

Purpose of the Study:

  • To investigate the structure and dynamics of Nanog protein condensates using molecular simulations.
  • To understand the role of Nanog's structural domains in condensate formation and function.

Main Methods:

  • Residue-level coarse-grained molecular simulations of human Nanog.
  • Analysis of Nanog condensate structure, including micelle-like cluster formation.
  • Investigating the impact of mutations on Nanog condensate stability and DNA binding.

Main Results:

  • Human Nanog forms dynamic, liquid-like micelle-like clusters.
  • Hydrophobic interactions within C-terminal disordered domains drive cluster formation.
  • Surface-exposed domains mediate inter-cluster interactions and DNA recruitment, shortening DNA-DNA distances.

Conclusions:

  • Nanog condensate structure is essential for its function in gene regulation.
  • The micelle-like organization allows Nanog to bridge and compact DNA.
  • Understanding Nanog condensate dynamics provides insights into stem cell gene regulation.