The G protein G13 mediates inhibition of voltage-dependent calcium current by bradykinin

M. A. Wilk-Blaszczak, W. D. Singer, S. Gutowski, P. C. Sternweis, F. Belardetti

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

In neuroblastoma-glioma hybrid cells, bradykinin has dual modulatory effects on ion channels: it activates a K+ current as well as inhibits the voltage-dependent Ca2+ current (ICa,V). Both of these actions are mediated by pertussis toxin-insensitive G proteins. Antibodies raised against the homologous Gq and G11 proteins suppress only the activation of the K+ current; this suggested that at least two distinct G protein pathways transduce diverse effects of this transmitter. Here, we show that the inhibition of ICa,V by bradykinin is suppressed selectively by intracellular application of antibodies specific for G13. This novel G protein may play a general role in the inhibition of ICa,V by pathways resistant to pertussis toxin.

Original languageEnglish (US)
Pages (from-to)1215-1224
Number of pages10
JournalNeuron
Volume13
Issue number5
DOIs
StatePublished - Nov 1994

ASJC Scopus subject areas

  • Neuroscience(all)

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