Chemosensory Signal Transduction in Paramecium
نویسندگان
چکیده
منابع مشابه
Chemosensory Transduction in Paramecium
Paramecium tetraurelia is attracted and repelled by a variety of chemical stimuli. The attractants probably signify the presence of nutrients. For attractants, there are at least three signal transduction pathways that all lead to a hyperpolarization of the cell that results in relatively fast and smooth swimming. The three pathways differ in stimuli, receptor mechanisms and second messengers. ...
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Glutamate is an attractant stimulus to Paramecium tetraurelia. It causes a hyperpolarization of the cell and smooth, relatively fast swimming that is characteristic of hyperpolarizing stimuli. We show here that by 1-30 seconds of stimulation, glutamate increases intracellular cAMP. Interestingly, other attractant stimuli, such as acetate and NH4Cl, that similarly hyperpolarize the cell do not i...
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Paramecia are ciliated single-cell eukaryotic organisms that can respond to chemical cues in their environment. Glutamate is among those cues, which attract cells. We describe briefly here the following attributes of glutamate chemoresponse: 1) Cells are attracted to L-glutamate relative to KCl at high concentrations of glutamate. 2) There are at least two specific, relatively low affinity glut...
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ژورنال
عنوان ژورنال: The Journal of Nutrition
سال: 2000
ISSN: 0022-3166,1541-6100
DOI: 10.1093/jn/130.4.946s