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With or without you: crosstalk between cell division and flagellum assembly
Philipp F Popp1, Marc Erhardt1
1Institute for Biology - Bacterial Physiology, Humboldt-Universität zu Berlin, Berlin, Germany.
Developmental Cell
|March 10, 2021
Summary
Researchers discovered a new mechanism in alpha-proteobacteria linking flagellar biosynthesis and cell division. A regulator ensures proper flagellar assembly, controlling inheritance during cell division.
Area of Science:
- Microbiology
- Cell Biology
- Bacterial Physiology
Background:
- Flagellar biosynthesis is crucial for bacterial motility and survival.
- Cell division requires precise coordination of cellular processes to ensure daughter cells receive essential components.
- The inheritance of complex structures like flagella during cell division presents a regulatory challenge.
Purpose of the Study:
- To elucidate the regulatory mechanism connecting flagellar assembly and bacterial cell division in alpha-proteobacteria.
- To identify the key regulator involved in sensing flagellar assembly status.
- To understand how this checkpoint ensures flagellar inheritance.
Main Methods:
- Genetic analysis of regulatory mutants in alpha-proteobacteria.
- Fluorescence microscopy to visualize flagellar assembly and cell division.
- Biochemical assays to confirm protein interactions and regulatory functions.
Main Results:
- A novel regulator was identified that links flagellar biosynthesis to cell division.
- This regulator acts as a checkpoint, sensing the completion of flagellar assembly.
- Proper flagellar assembly is required to proceed with cell division, ensuring flagellar inheritance.
Conclusions:
- A spatial and temporal checkpoint mechanism coordinates flagellar biosynthesis and cell division.
- This regulatory system ensures that daughter cells inherit a functional flagellum.
- The findings provide new insights into the complex coordination of bacterial morphogenesis and reproduction.
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