Cold-sensitive responses in the Paramecium membrane.
نویسندگان
چکیده
منابع مشابه
Defect of cold-sensitive response in calmodulin mutants of Paramecium and the restoration by cyclic nucleotide.
Wild type and calmodulin mutants (cam) of Paramecium tetraurelia were examined for cold-sensitive responses. Among mutants tested, cam12 and cam13 mutants, which have substitutions in N-terminal lobe of calmodulin molecule, reduced both responses in the swimming and the membrane potential. Under voltage clamp conditions, the cooling stimulus to the wild type cell induced a transient inward curr...
متن کاملThermo-sensitive response based on the membrane fluidity adaptation in Paramecium multimicronucleatum.
Relationships between the thermo-sensitive response and membrane lipid fluidity were studied using a ciliated protozoan, Paramecium multimicronucleatum. Paramecium elicits a transient membrane depolarization in response to a cooling stimulus (temperature drop). The depolarization amplitude was largest when the cooling stimulus was started from the culture temperature, whilst when cooling starte...
متن کاملMembrane potential responses of paramecium caudatum to bitter substances: existence of multiple pathways for bitter responses
The membrane potential responses of Paramecium caudatum to the external application of bitter substances were examined by employing conventional electrophysiological techniques. Mutant cells defective in voltage-gated Ca2+ channels were used to record the potential responses in the absence of contamination by Ca2+ action potentials. The cells produced a transient depolarization followed by a tr...
متن کاملMolecular aspects of membrane trafficking in paramecium.
Results achieved in the molecular biology of Paramecium have shed new light on its elaborate membrane trafficking system. Paramecium disposes not only of the standard routes (endoplasmic reticulum --> Golgi --> lysosomes or secretory vesicles; endo- and phagosomes --> lysosomes/digesting vacuoles), but also of some unique features, e.g. and elaborate phagocytic route with the cytoproct and memb...
متن کاملMembrane potential changes during chemokinesis in Paramecium.
Intracellular recordings show that (i) paramecia hyperpolarize slightly in attractants and depolarize in repellents that depend on the avoiding reaction (an abrupt change of swimming direction), and (ii) paramecia more strongly hyperpolarize in repellents and more strongly depolarize in attractants that depend on changes of swimming velocity. These membrane potential changes are in agreement wi...
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: Cell Structure and Function
سال: 1990
ISSN: 0386-7196,1347-3700
DOI: 10.1247/csf.15.107