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Updated: Sep 17, 2025
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FtsZ Polymerization Assays: Simple Protocols and Considerations
Published on: November 16, 2013
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Structural basis for the interaction between the bacterial cell division proteins FtsZ and ZapA
Junso Fujita1,2,3, Kazuki Kasai1,2, Kota Hibino4
1Graduate School of Frontier Biosciences, University of Osaka, Osaka, Japan.
Nature Communications
|July 2, 2025
Summary
The bacterial cell division proteins FtsZ and ZapA form a unique ladder-like complex. This structure reveals how ZapA stabilizes FtsZ filaments to promote cell division.
Area of Science:
- Microbiology
- Structural Biology
- Biochemistry
Background:
- Bacterial cell division is orchestrated by the tubulin homolog FtsZ.
- ZapA is a key FtsZ-associated protein, but its precise role in FtsZ regulation remains unclear.
Purpose of the Study:
- To elucidate the structural mechanism of FtsZ and ZapA coordination during bacterial cell division.
- To determine the high-resolution structure of the ZapA-FtsZ complex.
Main Methods:
- Cryo-electron microscopy (cryo-EM) at 2.73 Å resolution.
- High-speed atomic force microscopy (HS-AFM).
Main Results:
- The ZapA-FtsZ complex forms an asymmetric ladder structure with tethered FtsZ protofilaments.
- ZapA binding induces structural changes in FtsZ protofilaments, promoting double protofilament formation and increasing electrostatic repulsion.
- HS-AFM confirmed cooperative molecular interactions between ZapA and FtsZ.
Conclusions:
- The study provides a detailed structural basis for ZapA-FtsZ interactions.
- ZapA's mechanism involves stabilizing FtsZ protofilaments without hindering FtsZ dynamics, facilitating bacterial cell division.
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