Title : Ras proteins activate calcium channels in neuronal cells.

Pub. Date : 1991

PMID : 1652268






14 Functional Relationships(s)
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1 Here we present evidence that c-Ha-ras (p21(Gly-12)) and its oncogenic mutant T24-ras (p21(Val-12)) selectively induce omega-conotoxin and dihydropyridine-sensitive Ca2+ currents within a few hours after introduction into the cytoplasm of neuroblastoma x glioma hybrid cells. Glycine H3 histone pseudogene 16 Homo sapiens
2 Here we present evidence that c-Ha-ras (p21(Gly-12)) and its oncogenic mutant T24-ras (p21(Val-12)) selectively induce omega-conotoxin and dihydropyridine-sensitive Ca2+ currents within a few hours after introduction into the cytoplasm of neuroblastoma x glioma hybrid cells. Glycine H3 histone pseudogene 16 Homo sapiens
3 In cells loaded with p21(Gly-12), the effect occurred after 2 hours and was terminated after 8 hours. Glycine H3 histone pseudogene 16 Homo sapiens
4 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
5 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
6 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
7 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
8 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
9 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
10 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
11 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
12 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
13 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens
14 When ras proteins were preactivated with the non-hydrolysable GTP analog GppNHp, the time courses of both p21(Gly-12) and p21(Val-12) effects were fast and sustained, suggesting that in intact cells (i) the GDP/GTP exchange is faster for p21(Gly-12) compared to p21(Val-12) and (ii) inactivation of p21(Gly-12) is mediated by GAP-induced GTPase activity. Glycine H3 histone pseudogene 16 Homo sapiens