Lipids in the inner membrane of dormant spores of <i>Bacillus</i> species are largely immobile

DOI Web Site 被引用文献3件
  • Ann E. Cowan
    Department of Molecular, Microbial, and Structural Biology and Center for Biomedical Imaging Technology, University of Connecticut Health Center, Farmington, CT 06032
  • Elizabeth M. Olivastro
    Department of Molecular, Microbial, and Structural Biology and Center for Biomedical Imaging Technology, University of Connecticut Health Center, Farmington, CT 06032
  • Dennis E. Koppel
    Department of Molecular, Microbial, and Structural Biology and Center for Biomedical Imaging Technology, University of Connecticut Health Center, Farmington, CT 06032
  • Charles A. Loshon
    Department of Molecular, Microbial, and Structural Biology and Center for Biomedical Imaging Technology, University of Connecticut Health Center, Farmington, CT 06032
  • Barbara Setlow
    Department of Molecular, Microbial, and Structural Biology and Center for Biomedical Imaging Technology, University of Connecticut Health Center, Farmington, CT 06032
  • Peter Setlow
    Department of Molecular, Microbial, and Structural Biology and Center for Biomedical Imaging Technology, University of Connecticut Health Center, Farmington, CT 06032

抄録

<jats:p> Bacterial spores of various <jats:italic>Bacillus</jats:italic> species are impermeable or exhibit low permeability to many compounds that readily penetrate germinated spores, including methylamine. We now show that a lipid probe in the inner membrane of dormant spores of <jats:italic>Bacillus megaterium</jats:italic> and <jats:italic>Bacillus subtilis</jats:italic> is largely immobile, as measured by fluorescence redistribution after photobleaching, but becomes free to diffuse laterally upon spore germination. The lipid immobility in and the slow permeation of methylamine through the inner membrane of dormant spores may be due to a significant (1.3- to 1.6-fold) apparent reduction of the membrane surface area in the dormant spore relative to that in the germinated spore, but is not due to the dormant spore's high levels of dipicolinic acid and divalent cations. </jats:p>

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