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PRAG1 Condensation Drives Cell Contraction Under Stress.

Peiwu Ye1, Peiran Jiang2,3, Luyu Ye4

  • 1Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China.

Biomolecules
|March 28, 2025
PubMed
Summary
This summary is machine-generated.

Pseudopodium-enriched atypical kinase 1 (PRAG1) forms dynamic cell condensates. These PRAG1 condensates drive cell contraction, particularly under stress, revealing a new mechanism linked to Parkinson

Keywords:
PRAG1cell contractioncondensationphase separationstress

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Area of Science:

  • Cell Biology
  • Molecular Mechanisms
  • Neuroscience

Background:

  • Pseudopodium-enriched atypical kinase 1 (PRAG1), a pseudokinase, is implicated in cell morphology regulation.
  • The precise molecular mechanism underlying PRAG1's role in cell morphology remains unclear.

Purpose of the Study:

  • To elucidate the molecular mechanism by which PRAG1 regulates cell morphology.
  • To investigate the role of PRAG1 in cellular condensation and contraction under stress conditions.

Main Methods:

  • Investigated PRAG1's ability to form dynamic cellular condensates.
  • Utilized condensate-formation-deficient PRAG1 mutants to assess functional significance.
  • Observed PRAG1 condensate formation in various stress models and patient-derived neurons.

Main Results:

  • PRAG1 forms dynamic condensates in cells, mediated by its αN and αJ helices.
  • PRAG1 condensates are essential for mediating cell contraction; mutants lacking this function lose the ability.
  • Spherical PRAG1 condensates are observed in diverse stress models and Parkinson's disease patient-derived dopaminergic neurons.

Conclusions:

  • PRAG1 condensation drives cell contraction, establishing a novel mechanism for morphological regulation.
  • Aberrant PRAG1 phase separation may be linked to stress-induced cell contraction.
  • Findings suggest a potential role for PRAG1 in Parkinson's disease pathogenesis.