Different xanthines cause membrane potential oscillations in a unicellular green alga [Chlorophyceae] pointing to a ryanodine/cADPR receptor Ca2+ channel

In the unicellular green alga Eremosphaera viridis caffeine induces oscillations of cytosolic Ca2+ which cause membrane potential oscillations. Application of the caffeine analogues isocaffeine, theophylline, and isotheophylline resulted in membrane potential oscillations with a structure-activity r...

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Published inPlant and cell physiology Vol. 40; no. 4; pp. 453 - 456
Main Authors Bauer, C.S. (Universitaet Wuerzburg (Germany)), Simonis, W, Schoenknecht, G
Format Journal Article
LanguageEnglish
Published Oxford University Press 01.04.1999
Subjects
CALCIO
CALCIUM
CELL MEMBRANES
CHLOROPHYCEAE
Cytosolic Ca2
Eremosphaera viridis
ION
IONES
IONS
MEMBRANAS CELULARES
MEMBRANE CELLULAIRE
Oscillations
Ryanodine/cADPR receptor
XANTHINE
XANTHINES
XANTINAS
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Summary:In the unicellular green alga Eremosphaera viridis caffeine induces oscillations of cytosolic Ca2+ which cause membrane potential oscillations. Application of the caffeine analogues isocaffeine, theophylline, and isotheophylline resulted in membrane potential oscillations with a structure-activity relationship comparable to isolated ryanodine/cyclic ADPribose (cADPR) receptor Ca2+ channels from animal cells.
Bibliography:F60
1999007062
istex:CAF67D72607DF1AD71FE324C8705E1C726C6E1BA
ark:/67375/HXZ-R8T1V4TH-R
ArticleID:40.4.453
ISSN:0032-0781
1471-9053
DOI:10.1093/oxfordjournals.pcp.a029563