In-vivo phosphorylation of the cardiac L-type calcium channel beta-subunit in response to catecholamines

In-vivo phosphorylation of the cardiac L-type calcium channel beta-subunit in response to catecholamines
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心脏 L 型钙通道 β 亚基响应儿茶酚胺的体内磷酸化

DOI:
--
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发表时间:
1996
影响因子:
4.3
通讯作者:
E. Krause
E. Krause
中科院分区:
生物学3区
文献类型:
--
作者:
H. Haase;S. Bartel;P. Karczewski;I. Morano;E. Krause

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在犬心肌中,L型钙通道的β亚单位在体外和体内都被cAMP依赖的蛋白激酶磷酸化(Haase等人。Febs Lett 335:217-222,1993)。我们已经评估了β亚基的特性以及它在体内的磷酸化,在具有代表性的儿茶酚胺挑战的犬心实验组中。高剂量去甲肾上腺素和异丙肾上腺素的肾上腺素能刺激引起钙通道β亚基的快速和几乎完全的磷酸化。与未经治疗的对照组相比,体内的磷酸化水平大约高出4倍。当与儿茶酚胺耗竭(利血平治疗)相关时,去甲肾上腺素和异丙肾上腺素可使体内β亚单位的磷酸化增加8倍。这种磷酸化与组织cAMP水平、内源性cAMP依赖蛋白激酶(PKA)和收缩力量发展速率dp/dtmax呈正相关。这些结果表明,蛋白酪氨酸激酶介导的钙通道β亚基的磷酸化参与了对完整犬心肌的肾上腺素能刺激。
In canine myocardium, the β-subunit of the L-type Ca2+ channel is phosphorylated by cAMP dependent protein kinase in vitro as well as in vivo (Haase et al. FEBS Lett 335: 217–222, 1993). We have assessed the identity of the β-subunit as well as its in vivo phosphorylation in representative experimental groups of catecholamine-challenged canine hearts. Adrenergic stimulation by high doses of both noradrenaline and isoprenaline induced rapid (within 20 sec) and nearly complete phosphorylation of the Ca2+ channel β-subunit. Phosphorylation in vivo was about 4-fold higher as compared to untreated controls. When related to catecholamine-depleted (reserpine-treated) hearts noradrenaline and isoprenaline increased the in vivo phosphorylation of the β-subunit even 8-fold. This phosphorylation correlated positively with tissue levels of cAMP, endogenous particulated cAMP-dependent protein kinase (PKA) and the rate of contractile force development dP/dtmax. The results imply the involvement of a PKA-mediated phosphorylation of the Ca2+ channel β-subunit in the adrenergic stimulation of intact canine myocardium.
DOI: 10.1073/pnas.88.23.10778
发表时间: 1991-12-01
影响因子: 11.1
作者:
DEJONGH, KS;WARNER, C;CATTERALL, WA
通讯作者: CATTERALL, WA
大鼠骨骼肌细胞中 L 型钙通道的 α1 亚基的两种大小形式的环 AMP 依赖性磷酸化。
DOI: --
发表时间: 1990
期刊: The Journal of biological chemistry
影响因子: --
作者:
Lai,Y;Seagar,MJ;Takahashi,M;Catterall,WA
通讯作者: Catterall,WA
DOI: 10.1016/s0021-9258(17)44447-4
发表时间: 1983-09
期刊: The Journal of biological chemistry
影响因子: --
作者:
I. Buxton;L. Brunton
通讯作者: I. Buxton;L. Brunton
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Mundiña-Weilenmann,C;Chang,CF;Gutierrez,LM;Hosey,MM
通讯作者: Hosey,MM
DOI: 10.1073/pnas.90.21.10135
发表时间: 1993-11-01
影响因子: 11.1
作者:
SCULPTOREANU, A;ROTMAN, E;CATTERALL, WA
通讯作者: CATTERALL, WA