Identification of Cav2–PKCβ and Cav2–NOS1 complexes as entities for ultrafast electrochemical coupling
Identification of Cav2–PKCβ and Cav2–NOS1 complexes as entities for ultrafast electrochemical coupling
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鉴定 Cav2âPKCβ 和 Cav2âNOS1 复合物作为超快电化学耦合的实体
DOI:
10.1073/pnas.1616394114
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Fakler
中科院分区:
文献类型:
--
作者:
Constantin;Müller;Leitner;Schulte;Oliver;Fakler
Voltage-activated calcium (Cav) channels couple intracellular signaling pathways to membrane potential by providing Ca2+ions as second messengers at sufficiently high concentrations to modulate effector proteins located in the intimate vicinity of those channels. Here we show that protein kinase Cβ (PKCβ) and brain nitric oxide synthase (NOS1), both identified by proteomic analysis as constituents of the protein nano-environment of Cav2 channels in the brain, directly coassemble with Cav2.2 channels upon heterologous coexpression. Within Cav2.2–PKCβ and Cav2.2–NOS1 complexes voltage-triggered Ca2+influx through the Cav channels reliably initiates enzymatic activity within milliseconds. Using BKCachannels as target sensors for nitric oxide and protein phosphorylation together with high concentrations of Ca2+buffers showed that the complex-mediated Ca2+signaling occurs in local signaling domains at the plasma membrane. Our results establish Cav2–enzyme complexes as molecular entities for fast electrochemical coupling that reliably convert brief membrane depolarization into precisely timed intracellular signaling events in the mammalian brain.
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影响因子:
20.1
作者:
Jaggar, JH;Li, AL;Leffler, CW
通讯作者:
Leffler, CW
影响因子:
2.9
作者:
Igumenova TI
通讯作者:
Igumenova TI
DOI:
10.1073/pnas.0505136102
发表时间:
2005-10-11
影响因子:
11.1
作者:
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通讯作者:
Umezawa, Y
影响因子:
5.3
作者:
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Kulik Á
影响因子:
3.5
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