Phosphatidylinositol 3,5-bisphosphate defines a novel PI 3-kinase pathway in resting mouse fibroblasts
Phosphatidylinositol 3,5-bisphosphate defines a novel PI 3-kinase pathway in resting mouse fibroblasts
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DOI:
10.1042/bj3230597
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发表时间:
1997-05-01
影响因子:
4.1
通讯作者:
Ulug, ET
中科院分区:
文献类型:
--
作者:
Whiteford, CC;Brearley, CA;Ulug, ET
PtdIns(3,5)P-2 is identified as the product of an agonist-independent, wortmannin-sensitive pathway in resting mouse cells. Results are presented here to indicate that PtdIns(3,5)P-2 is formed by phosphorylation of PtdIns3P at the D-5 position, and they suggest that relatively constant cellular levels of PtdIns3P and PtdIns(3,5)P-2 are maintained by the concerted action of PtdIns3P 5-kinase and PtdIns(3,5)P-2 5-phosphatase. These studies imply a novel mechanism for the action of PtdIns-specific phosphoinositide 3-hydroxykinases in mammalian cells.