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Membrane redistribution of the Escherichia coli MinD protein induced by MinE

S L Rowland1, X Fu, M A Sayed

  • 1Department of Microbiology, University of Connecticut Health Center, Farmington, Connecticut 06032, USA.

Journal of Bacteriology
|January 14, 2000
PubMed

Insights

The MinE protein alters the membrane distribution of MinD in Escherichia coli, influencing cell division site selection. Different MinE domains play distinct roles in this process.

Area of Science:

  • Microbiology
  • Cell Biology
  • Molecular Biology

Background:

  • Escherichia coli cell division is regulated by the MinC, MinD, and MinE protein system.
  • MinE-GFP localization to midcell is dependent on MinD.
  • Potential division sites exist at midcell and cell poles.

Purpose of the Study:

  • To investigate the membrane association of MinD in the absence of other Min proteins.
  • To determine how MinE affects the membrane distribution of MinD.
  • To elucidate the roles of different MinE domains in MinD redistribution.

Main Methods:

  • Utilized Green Fluorescent Protein (GFP) tagging to visualize MinD (GFP-MinD).
  • Observed MinD localization in the presence and absence of other Min proteins.
  • Studied the effects of isolated N-terminal and C-terminal MinE domains on MinD distribution.

Main Results:

  • MinD associates with the cell membrane peripherally in the absence of MinC and MinE.
  • MinE modifies the membrane distribution pattern of GFP-MinD.
  • Distinct roles were identified for the N-terminal and C-terminal domains of MinE in altering MinD localization.

Conclusions:

  • MinE plays a crucial role in regulating the membrane localization of MinD.
  • The Min system's spatial control of cell division involves dynamic MinD redistribution influenced by MinE.
  • Understanding MinE domain functions provides insight into the precise spatial regulation of bacterial cytokinesis.

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