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A Nanobar-Supported Lipid Bilayer System for the Study of Membrane Curvature Sensing Proteins in vitro
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Interaction between membrane curvature sensitive factors SpoVM and SpoIVA in Bicelle condition

Jiali Chen1, Yifan Wang2, Shuru Lin2

  • 1School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China; Shanghai Institute of Materia Medica, Zhongshan Institute for Drug Discovery, Chinese Academy of Sciences, Zhongshan, 528400, China.

Biochemical and Biophysical Research Communications
|December 23, 2023
PubMed

Insights

This study investigated the interaction between SpoVM and SpoIVA proteins, crucial for bacterial coat assembly. Researchers determined the kinetic parameters of their interaction, providing insights into this essential cellular process.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • SpoVM and SpoIVA are vital proteins involved in coat assembly in Bacillus subtilis.
  • SpoVM functions as a membrane curvature sensor on the forespore membrane.
  • SpoIVA is an ATP hydrolase that self-assembles through ATP hydrolysis.

Purpose of the Study:

  • To determine the kinetic parameters of the interaction between SpoVM and SpoIVA.
  • To investigate the interaction using a reconstituted system in bicelles.

Main Methods:

  • SpoVM and its mutant SpoVMP9A were purified using cyanogen bromide cleavage and reconstituted into bicelles.
  • SpoIVA was purified using Ni-NTA chromatography and size exclusion chromatography.
  • Biacore technology was employed to measure the kinetic parameters of the SpoVM-SpoIVA interaction.

Main Results:

  • Direct kinetic parameters for the interaction between SpoVM (including SpoVMP9A) and SpoIVA were determined.
  • The study provides quantitative data on the binding kinetics under bicelle conditions.

Conclusions:

  • The findings offer a direct kinetic characterization of the SpoVM-SpoIVA interaction.
  • This research contributes to understanding the molecular mechanisms of coat assembly in Bacillus subtilis.
Keywords:
BicellesInteractionPurificationSpoIVASpoVMSpoVM(P9A)

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