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Updated: Jan 3, 2026

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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How contraction has shaped evolution.

Mukund Thattai1

  • 1Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India.

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Summary
This summary is machine-generated.

Coordinated cell contractions using actomyosin, a key feature of animal life, evolved before multicellular animals. This discovery sheds light on the early evolution of cellular coordination.

Keywords:
actincell biologycellularizationcoenocyteepitheliumevolutionevolutionary biologymulticellularity

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Area of Science:

  • Evolutionary biology
  • Cell biology
  • Biochemistry

Background:

  • Animal multicellularity is characterized by coordinated cell behaviors.
  • Actomyosin-based contractions are crucial for many cellular functions in animals.

Purpose of the Study:

  • To investigate the evolutionary origins of coordinated cell contractions.
  • To determine if actomyosin-mediated contractions existed before the emergence of animal multicellularity.

Main Methods:

  • Comparative analysis of unicellular relatives of animals.
  • Investigation of actomyosin dynamics and contractility in these organisms.

Main Results:

  • Two unicellular relatives of animals exhibit coordinated cell contractions.
  • The mechanism of contraction involves actomyosin, similar to that in animals.

Conclusions:

  • Coordinated actomyosin-based cell contractions predated the evolution of animal multicellularity.
  • This finding provides insights into the pre-evolutionary cellular mechanisms that enabled complex animal life.