Regulatory subunit of cAMP-dependent protein kinase inhibits phosphoprotein phosphatase.

Regulatory subunit of cAMP-dependent protein kinase inhibits phosphoprotein phosphatase.
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cAMP 依赖性蛋白激酶的调节亚基抑制磷蛋白磷酸酶。

DOI:
10.1016/0006-291x(85)90454-1
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发表时间:
1985
影响因子:
3.1
通讯作者:
Corbin,JD
Corbin,JD
中科院分区:
生物学4区
文献类型:
--
作者:
Khatra,BS;Printz,R;Cobb,CE;Corbin,JD

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纯化的高分子量磷蛋白磷酸酶的活性被纯化的 II 型 cAMP 依赖性蛋白激酶抑制。这种效应需要 cAMP,并且是在没有 ATP 的情况下获得的。来自几个物种的分离的 II 型调节亚基(R 亚基)也抑制粗提物和纯化制剂中的磷酸酶活性。在 0.06–0.25μM 时观察到半最大抑制,完全在 R 亚基浓度的生理范围内。使用硫代磷酸化形式时,R 亚基的抑制效力更大。 R 亚基的有限胰蛋白酶作用消除了抑制活性。当与 R 亚基结合时,C 亚基释放结合的 cAMP,但磷酸酶则不会,这意味着受抑制的物质是 R.cAMP-磷酸酶复合物。结果表明,除了抑制C亚基之外,R亚基可能还具有至少一种生理作用,即抑制磷酸酶。后者仅在 cAMP 升高时才会发生。
The activity of a purified high molecular weight phosphoprotein phosphatase was inhibited by purified type II cAMP-dependent protein kinase. This effect required cAMP and was obtained in the absence of ATP. The isolated type II regulatory subunits (R-subunits) from several species also inhibited the phosphatase activity in both crude extracts and purified preparations. Half maximal inhibition was observed at 0.06–0.25μM, well within the physiological range of R-subunit concentrations. The inhibitory potency of R-subunit was greater using the thiophosphorylated form. Limited trypsinization of the R-subunit abolished the inhibitory activity. The C-subunit released the bound cAMP when combined with R-subunit, but the phosphatase did not, implying that the inhibited species is a R.cAMP-phosphatase complex. The results suggest that the R-subunit might have at least one physiological role in addition to inhibition of the C-subunit, i.e., inhibition of phosphatase. The latter would occur only when cAMP is elevated.
DOI: --
发表时间: 1977
期刊: FEBS Letters
影响因子: 3.5
作者:
P. Gergely;G. Bot
通讯作者: G. Bot
肾上腺素和胰岛素对灌注大鼠骨骼肌磷酸化酶磷酸酶抑制剂1磷酸化的影响
DOI: 10.1016/0014-5793(80)81127-6
发表时间: 1980
期刊: FEBS Letters
影响因子: 3.5
作者:
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通讯作者: T. Soderling
DOI: 10.1021/bi00283a014
发表时间: 1983-07
期刊: Biochemistry
影响因子: 2.9
作者:
L. Ballou;D. Brautigan;E. Fischer
通讯作者: L. Ballou;D. Brautigan;E. Fischer
DOI: 10.1111/j.1432-1033.1984.tb08521.x
发表时间: 1984-01-01
期刊: EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子: --
作者:
TUNG, HYL;COHEN, P
通讯作者: COHEN, P
胰岛素和β-肾上腺素能激动剂对灌注大鼠半体骨骼肌中蛋白磷酸酶抑制剂-1活性的拮抗作用。
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Foulkes,JG;Cohen,P;Strada,SJ;Everson,WV;Jefferson,LS
通讯作者: Jefferson,LS