منابع مشابه
Dislocation-mediated growth of bacterial cell walls.
Recent experiments have illuminated a remarkable growth mechanism of rod-shaped bacteria: proteins associated with cell wall extension move at constant velocity in circles oriented approximately along the cell circumference [Garner EC, et al., (2011) Science 333:222-225], [Domínguez-Escobar J, et al. (2011) Science 333:225-228], [van Teeffelen S, et al. (2011) PNAS 108:15822-15827]. We view the...
متن کاملSalt-induced contraction of bacterial cell walls.
Intact Bacillus megaterium cells were found to contract as much as 26% in terms of dextran-impermeable volume when transferred from water to unbuffered, non-plasmolyzing NaCl solutions. This shrinkage appeared to be primarily due to electrostatic wall contraction rather than to any osmotic response of the cells. A variety of salts (but not sucrose) added to water suspensions of isolated cell wa...
متن کاملVisualizing Bacterial Cell Walls and Biofilms
T he surfaces of microbial cells are perhaps their most important structure because they are in immediate contact with the external environment. Microbial cell walls admit nutrients and release wastes, and yet they must resist internal turgor pressure and environmental insults and maintain cellular shape. Walls also help cells adhere to other surfaces and provide space for specialized structure...
متن کاملAntimicrobial agents targeting bacterial cell walls and cell membranes.
Antimicrobial agents that target the bacterial cell wall or cell membrane have been used effectively for the past 70 years. Among the agents that inhibit bacterial cell wall synthesis, the beta-lactam antibiotics have emerged into broad-spectrum agents that inhibit most pathogenic bacteria, but are now being threatened by the rapid spread of drug-inactivating beta-lactamases. Glycopeptides stil...
متن کاملBiosynthesis of the Peptidoglycan of Bacterial Cell Walls
An uncross-linked monomer (nascent peptidogly’can unit) accumulates in cells of Staphylococcus aureus treated with low concentrations of penicillin G or with ampicillin, methicillin, or cephalothin. The uncross-linked monomer has been isolated, and analyses indicate that it represents a prefabricated subunit of the wall bearing both of the o-alanine residues of its pentapeptide precursor as wel...
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ژورنال
عنوان ژورنال: Journal of the agricultural chemical society of Japan
سال: 1961
ISSN: 0002-1407,1883-6844
DOI: 10.1271/nogeikagaku1924.35.12_a53