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The evolution of animal cell motility
1Department of Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA.
Current Biology : CB
|May 20, 2020
Summary
Eukaryotic cells utilize flagella for swimming and actin for crawling. The eukaryotic flagellum has a single evolutionary origin, while actin-based cell migration involves multiple distinct mechanisms whose evolution is under exploration.
Area of Science:
- Cell biology
- Evolutionary biology
- Biophysics
Background:
- Eukaryotic cells exhibit diverse motility mechanisms for locomotion.
- Flagellar-dependent swimming and actin-dependent migration are prevalent in eukaryotes.
- Understanding the evolution of these motility systems provides insight into eukaryotic diversification.
Purpose of the Study:
- To explore the evolutionary origins of eukaryotic cell motility.
- To compare the evolutionary history of flagellar-based swimming and actin-based crawling.
- To highlight the current understanding and future research directions in the evolution of cell migration.
Main Methods:
- Comparative analysis of morphological and molecular phenotypes.
- Phylogenetic reconstruction of motility-related genes and structures.
- Literature review of evolutionary cell biology studies.
Main Results:
- Strong evidence supports a single, ancient evolutionary origin for the eukaryotic flagellum.
- Flagellar evolution predates the diversification of major eukaryotic lineages.
- Actin-dependent cell migration involves multiple, distinct molecular pathways with independent evolutionary histories.
Conclusions:
- The eukaryotic flagellum is a conserved structure with a unified evolutionary origin.
- Actin-based cell migration represents a more complex and potentially convergent evolutionary phenomenon.
- Further research is needed to fully elucidate the evolutionary pathways of actin-dependent motility mechanisms.
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