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Structural/functional homology between the bacterial and eukaryotic cytoskeletons
Linda A Amos1, Fusinita van den Ent, Jan Löwe
1MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK. laa@mrc-lnb.cam.ac.uk
Current Opinion in Cell Biology
|March 24, 2004
Summary
Structural proteins control cell division and shape in both prokaryotes and eukaryotes. Bacterial proteins like ParM and MreB are functionally and structurally similar to eukaryotic actin and tubulin, highlighting conserved cellular mechanisms.
Area of Science:
- Cell Biology
- Structural Biology
- Microbiology
Background:
- Structural proteins are crucial for cell division and maintaining cell shape in eukaryotes.
- Recent findings indicate similar roles for structural proteins in prokaryotes.
Purpose of the Study:
- To explore the functional and structural similarities between prokaryotic and eukaryotic structural proteins.
- To understand the conserved mechanisms of cell division and shape maintenance across different domains of life.
Main Methods:
- Comparative analysis of protein structures.
- Functional studies of bacterial proteins ParM, MreB, and FtsZ.
- Examination of protein interactions and filament formation.
Main Results:
- Bacterial ParM and MreB proteins share structural and functional similarities with eukaryotic actin, forming filaments and driving motility or maintaining cell shape.
- Bacterial FtsZ protein resembles eukaryotic tubulin in structure and dynamic assembly.
- Bacterial MinD exhibits functional parallels with eukaryotic dynamin in membrane control.
Conclusions:
- Prokaryotic structural proteins play essential roles in cell division and shape, mirroring eukaryotic counterparts.
- Conserved protein structures and functions suggest a shared evolutionary origin for fundamental cellular processes.
- Bacterial and eukaryotic proteins cooperate in the division of organelles of bacterial origin.
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