Signaling diversity of PKA achieved via a Ca2+-cAMP-PKA oscillatory circuit.

Signaling diversity of PKA achieved via a Ca2+-cAMP-PKA oscillatory circuit.
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通过CA2+-CAMP-PKA振荡电路实现的PKA的信号多样性。

DOI:
10.1038/nchembio.478
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发表时间:
2011-01
影响因子:
14.8
通讯作者:
Zhang, Jin
Zhang, Jin
中科院分区:
生物学1区
文献类型:
--
作者:
Ni, Qiang;Ganesan, Ambhighainath;Aye-Han, Nwe-Nwe;Gao, Xinxin;Allen, Michael D.;Levchenko, Andre;Zhang, Jin

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Many protein kinases are key nodal signaling molecules that regulate a wide range of cellular functions. These functions may require complex spatiotemporal regulation of kinase activities. Here, we show that Protein Kinase A (PKA), Ca2+ and cAMP oscillate in sync in insulin-secreting MIN6 β cells, forming a highly integrated oscillatory circuit. We found that PKA activity was essential for this oscillatory circuit, and was capable of not only initiating the signaling oscillations but also modulating their frequency, thereby diversifying the spatiotemporal control of downstream signaling. Our findings suggest that exquisite temporal control of kinase activity, mediated via signaling circuits resulting from cross-regulation of signaling pathways, can encode diverse inputs into temporal parameters such as oscillation frequency, which in turn contributes to proper regulation of complex cellular functions in a context-dependent manner.
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