Related Experiment Video
Updated: May 22, 2026
06:48
Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates
Published on: January 5, 2024
MORC2 mediates transcriptional regulation through liquid-liquid phase separation
Yanshen Zhang1,2,3, Weiya Xu1,2, Wenxiu Duan1,2
1Hefei National Research Center for Physical Sciences at the Microscale, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
Elife
|May 20, 2026
Summary
MORC2 protein forms dynamic nuclear condensates essential for gene silencing. DNA templating and condensate fluidity regulate MORC2
Area of Science:
- Molecular Biology
- Biophysics
- Genetics
Background:
- MORC2 is a chromatin-associated ATPase crucial for transcriptional silencing and genome stability.
- The biophysical mechanisms underlying MORC2's regulatory functions are not well understood.
Purpose of the Study:
- To elucidate the biophysical principles governing MORC2's regulatory activity.
- To investigate the role of biomolecular condensation in MORC2 function.
- To link MORC2 condensate dysregulation to human neuropathies.
Main Methods:
- Biomolecular condensation assays
- Crystal structure determination (3.1 Å) of MORC2's coiled-coil 3 domain
- Chimeric mouse models (Morc2aEGFP)
- CRISPR/Cas9 gene editing (MORC2-knockout cells)
- 'Killswitch' strategy to decouple assembly and fluidity
Main Results:
- Full-length MORC2 undergoes DNA-templated biomolecular condensation, forming dynamic nuclear assemblies required for repressor function.
- A dimeric scaffold (CC3) and multivalent interactions (IDR-IBD) drive condensation.
- Dynamic MORC2 condensates, not static aggregates, restore transcriptional regulation in knockout cells.
- Pathogenic variants linked to CMT2Z and SMA disrupt condensate properties and enzymatic activity.
Conclusions:
- MORC2 condensation is a DNA-templated process essential for transcriptional regulation.
- The material properties of MORC2 condensates are critical for its function.
- Dysregulation of MORC2 condensate dynamics provides a mechanistic link to neuropathies like CMT2Z and SMA.
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