2004
DOI: 10.1074/jbc.m313284200
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Ca2+ and Phosphatidylinositol 4,5-Bisphosphate Stabilize a Gβγ-sensitive State of CaV2 Ca2+ Channels

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Cited by 24 publications
(24 citation statements)
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“…The positive slope for the current dependence of I Ba inactivation (0.02 Ϯ 0.01) could have resulted from Ba 2ϩ -dependent effects on inactivation that have been described for L-type Ca 2ϩ channels (37). It is not clear why the corresponding relationship for I Ca with 10 mM BAPTA exhibited a negative slope (Ϫ0.01 Ϯ 0.01), although stimulatory effects of BAPTA on the amplitude of Ca v 2.1 currents, have been reported in previous studies (38,39). The difference between inactivation for I Ca and I Ba , which reflects the magnitude of CDI, was significantly greater for larger currents (ϳ20%, p Ͻ 0.05, Fig.…”
Section: Current Dependence Of CDI and Sensitivity To Egta-camentioning
confidence: 74%
“…The positive slope for the current dependence of I Ba inactivation (0.02 Ϯ 0.01) could have resulted from Ba 2ϩ -dependent effects on inactivation that have been described for L-type Ca 2ϩ channels (37). It is not clear why the corresponding relationship for I Ca with 10 mM BAPTA exhibited a negative slope (Ϫ0.01 Ϯ 0.01), although stimulatory effects of BAPTA on the amplitude of Ca v 2.1 currents, have been reported in previous studies (38,39). The difference between inactivation for I Ca and I Ba , which reflects the magnitude of CDI, was significantly greater for larger currents (ϳ20%, p Ͻ 0.05, Fig.…”
Section: Current Dependence Of CDI and Sensitivity To Egta-camentioning
confidence: 74%
“…Recently, it was shown that endogenous membrane PIP 2 helps in maintaining the function of high-voltage-activated Ca 2ϩ channels, and stimuli that activate PLC deplete PIP 2 and reduce Ca 2ϩ channels currents (Perez-Burgos et al 2010; Rousset et al 2004;Suh et al 2010;Wu et al 2002). Given that D 3 R activates PLC in MSNs (Fig.…”
Section: Histograms Inmentioning
confidence: 99%
“…La structure proposée pour les trois sous-unités (β2, β3 et β4) semble en accord sur tous ces points, bien que la structure des différentes régions variables (V1, V2 et V3) n'ait pas pu être détermi-née. Dans chacune de ces études, la fixation de l'AID se fait sur une extrémité restreinte de la sous-unité β laissant une large surface libre pour des interactions avec d'autres parties du canal [11,12], d'autres partenaires protéiques [13,22], ou des constituants de la membrane cytoplasmique [9,23,24]. Cependant, dans tous les cas, l'interaction entre les domaines SH3 et GK apparaît plus lâche que dans les autres protéines de la famille MAGUK (par exemple, PSD95 [17]).…”
Section: Structure Tridimensionnelle De La Sous-unité βunclassified