The Spore Coats of Selaginella
نویسندگان
چکیده
منابع مشابه
Physical basis for the adaptive flexibility of Bacillus spore coats.
Bacillus spores are highly resistant dormant cells formed in response to starvation. The spore is surrounded by a structurally complex protein shell, the coat, which protects the genetic material. In spite of its dormancy, once nutrient is available (or an appropriate physical stimulus is provided) the spore is able to resume metabolic activity and return to vegetative growth, a process requiri...
متن کاملThe composition of the spore coats of Bacillus megatherium, B. subtilis and B. cereus.
A peptide containing glutamic acid, alanine, aediaminopimelic acid and hexosamine was found to be present in exudates from germinating spores and in extracts from disintegrated resting spores (Powell & Strange, 1953; Strange & Powell, 1954). It was suggested that the peptide might be derived from the spore coat when this underwent a change in permeability during germination or was damaged mecha...
متن کاملProteomic analysis of the spore coats of Bacillus subtilis and Bacillus anthracis.
The outermost proteinaceous layer of bacterial spores, called the coat, is critical for spore survival, germination, and, for pathogenic spores, disease. To identify novel spore coat proteins, we have carried out a preliminary proteomic analysis of Bacillus subtilis and Bacillus anthracis spores, using a combination of standard sodium dodecyl sulfate-polyacrylamide gel electrophoresis separatio...
متن کاملEllipsoid Localization Microscopy Infers the Size and Order of Protein Layers in Bacillus Spore Coats.
Multilayered protein coats are crucial to the dormancy, robustness, and germination of bacterial spores. In Bacillus subtilis spores, the coat contains over 70 distinct proteins. Identifying which proteins reside in each layer may provide insight into their distinct functions. We present image analysis methods that determine the order and geometry of concentric protein layers by fitting a model...
متن کاملLocalization of proteins to different layers and regions of Bacillus subtilis spore coats.
Bacterial spores are encased in a multilayered proteinaceous shell known as the coat. In Bacillus subtilis, over 50 proteins are involved in spore coat assembly but the locations of these proteins in the spore coat are poorly understood. Here, we describe methods to estimate the positions of protein fusions to fluorescent proteins in the spore coat by using fluorescence microscopy. Our investig...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1905
ISSN: 0006-8071
DOI: 10.1086/328677