Microtubules in Microorganisms: How Tubulin Isotypes Contribute to Diverse Cytoskeletal Functions
1Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, United States.
Frontiers in Cell and Developmental Biology
|July 22, 2022
Summary
Microtubules (MTs), built from tubulin protein variants, perform diverse cellular roles. Research in microbial models reveals how specific tubulin isotypes and their modifications drive distinct MT functions.
Area of Science:
- Cell Biology
- Cytoskeletal Dynamics
Background:
- Microtubules (MTs) are essential cytoskeletal components assembled from α- and β-tubulin heterodimers.
- Tubulin isotypes and posttranslational modifications (PTMs) create diverse MT polymers.
- The multi-tubulin hypothesis posits that these variations confer unique properties for cellular functions.
Purpose of the Study:
- To review the role of tubulin isotypes in microtubule function.
- To highlight insights gained from eukaryotic microbial model systems.
- To discuss ongoing and future research directions.
Main Methods:
- Review of existing literature on tubulin isotypes and MTs.
- Focus on studies utilizing genetically tractable microbial models.
- Analysis of evidence supporting the multi-tubulin hypothesis.
Main Results:
- Microbial models provided early evidence for distinct tubulin isotype properties.
- Recent findings show how specific isotypes facilitate cellular processes.
- PTMs further diversify MT functions.
Conclusions:
- Eukaryotic microbes are powerful systems for studying tubulin isotypes.
- Tubulin isotype diversity is crucial for a range of cellular functions.
- Future research in microbes will illuminate conserved and diverse MT mechanisms.
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