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Escherichia coli inner membrane protein YciB interacts with ZipA that is important for cell division

Noor Afiza Badaluddin1, Madoka Kitakawa1

  • 1Department of Biology, Faculty of Science, Kobe University, Rokko 1-1, Nada, Kobe 657-8501, Japan.

Genes to Cells : Devoted to Molecular & Cellular Mechanisms
|September 23, 2015
PubMed

Insights

The study reveals that the Escherichia coli YciB protein influences cell length and division. Deleting yciB shortens cells, while over-expression elongates them, impacting ZipA localization during cell fission.

Area of Science:

  • Microbiology
  • Cell Biology
  • Molecular Biology

Background:

  • Escherichia coli (E. coli) undergoes cell division through elongation, septum formation, and fission.
  • While many genes regulating E. coli cell division are known, novel factors likely exist.
  • The protein ZipA is essential for E. coli cell division and septum localization.

Purpose of the Study:

  • To investigate the role of the yciB gene in Escherichia coli cell division and morphology.
  • To determine the interaction between YciB and ZipA during cell division.

Main Methods:

  • Comparative analysis of wild-type and yciB deletion mutant (ΔyciB) E. coli strains.
  • Over-expression studies of the yciB gene.
  • Assessment of cell length and ZipA protein localization.
  • In vitro interaction studies using purified YciB protein and ZipA.

Main Results:

  • ΔyciB mutants exhibit reduced cell length compared to wild-type E. coli.
  • Over-expression of yciB leads to increased E. coli cell elongation.
  • Septum localization of the essential cell division protein ZipA is disrupted in ΔyciB mutants.
  • Purified YciB directly interacts with ZipA.

Conclusions:

  • YciB plays a significant role in regulating E. coli cell length and division.
  • YciB's interaction with ZipA suggests a role in ZipA-directed cell envelope synthesis.
  • This function of YciB appears to be independent of Penicillin-Binding Protein 3 (PBP3).

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