Phosphoinositide-specific phospholipase C interacts with phosphatidylinositol kinase homolog TOR2.

Phosphoinositide-specific phospholipase C interacts with phosphatidylinositol kinase homolog TOR2.
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磷酸肌醇特异性磷脂酶 C 与磷脂酰肌醇激酶同系物 TOR2 相互作用。

DOI:
10.1006/bbrc.1998.9639
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发表时间:
1998
期刊:
Biochemical and biophysical research communications.
影响因子:
--
通讯作者:
Vancura,A
Vancura,A
中科院分区:
--
文献类型:
--
作者:
Lin,H;Choi,JH;Vancura,A

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酿酒酵母 PLC1 基因编码哺乳动物磷酸肌醇特异性磷脂酶 C δ 亚型的同源物。删除 PLC1 基因 (plc1Δ) 的细胞是可行的,但表现出多种表型,包括温度和渗透敏感性以及对除葡萄糖以外的碳源的利用缺陷。我们使用两种混合筛选来鉴定 Plc1p 相互作用蛋白。其中一个已鉴定的蛋白质是 Tor2p,一种假定的磷脂酰肌醇 (PtdIns) 激酶,参与蛋白质合成、细胞周期进程和肌动蛋白细胞骨架组织的调节。这种相互作用通过 Plc1p 和 Tor2p 的共沉淀在生物化学上得到了证实。结果表明,Tor2p 作为一种 PtdIns 激酶,产生磷酸化的 PtdIns,然后被相关的 Plc1p 水解。因此,Tor2p 与 Plc1p 的接近可能导致 PtdIns 磷酸化形式的合成和水解的受调控的空间和时间耦合。
TheSaccharomyces cerevisiae PLC1gene encodes a homolog of the δ isoform of mammalian phosphoinositide-specific phospholipase C. Cells deleted forPLC1gene (plc1Δ) are viable but display several phenotypes, including temperature and osmotic sensitivity and defects in utilization of carbon sources other than glucose. We have used the two hybrid screen to identify Plc1p-interacting proteins. One of the identified proteins was Tor2p, a putative phosphatidylinositol (PtdIns) kinase involved in regulation of protein synthesis, cell cycle progression and organization of the actin cytoskeleton. This interaction was confirmed biochemically by coprecipitation of Plc1p and Tor2p. The results suggest that Tor2p, as a PtdIns kinase, produces phosphorylated PtdIns, which is then hydrolyzed by the associated Plc1p. The proximity of Tor2p to Plc1p may therefore result in a regulated spatial and temporal coupling of synthesis and hydrolysis of phosphorylated forms of PtdIns.
DOI: 10.1128/mcb.13.10.6012-6023.1993
发表时间: 1993-10
影响因子: 5.3
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通过抑制酿酒酵母中的细胞周期蛋白依赖性蛋白激酶,可以减轻磷酸肌醇特异性磷脂酶 C 的基本功能。
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发表时间: 1998
期刊: Genetics
影响因子: 3.3
作者:
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