Inhibition of phosphatidylinositol-4-phosphate kinase by its product phosphatidylinositol-4,5-bisphosphate.

Inhibition of phosphatidylinositol-4-phosphate kinase by its product phosphatidylinositol-4,5-bisphosphate.
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其产物磷脂酰肌醇-4,5-二磷酸对磷脂酰肌醇-4-磷酸激酶的抑制作用。

DOI:
10.1016/0006-291x(85)90584-4
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发表时间:
1985
影响因子:
3.1
通讯作者:
Bazan,NG
Bazan,NG
中科院分区:
生物学4区
文献类型:
--
作者:
VanRooijen,LA;Rossowska,M;Bazan,NG

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摘要牛视网膜高速培养上清与[γ-32 P] ATP和4-磷酸磷脂酰肌醇(PIP)共同孵育,酶促产生4,5-二磷酸磷脂酰肌醇(PIP 2)。外源性PIP 2抑制PIP激酶活性50%,在等摩尔浓度的产品和底物。用32 P标记的豚鼠神经末梢膜与可溶性视网膜组分孵育,观察到Ca 2+依赖的磷酸二酯酶活性,导致PIP 2和PIP的丧失,并伴随着1,4,5-三磷酸肌醇和1,4-二磷酸肌醇的增加。这表明,polyphosphoinositides是严格和复杂的控制下,并在受体激活介导的刺激磷酸二酯降解释放的反馈抑制,这里显示可能会发生,并导致在合成和补充PIP 2。
Abstract Phosphatidylinositol 4, 5-bisphosphate (PIP 2) is enzymatically produced when high speed supernatant fraction from bovine retina is incubated with [γ-32 P] ATP and phosphatidylinositol 4-phosphate (PIP) as substrates. Exogenously added PIP 2 inhibits PIP kinase activity 50% at equimolar concentrations of product and substrate. Ca 2+-dependent phosphodiesteratic activity, resulting in the loss of PIP 2 and PIP and concommitant increase in myo-inositol 1, 4, 5-trisphosphate and myo-inositol 1, 4-bisphosphate, was observed when soluble retinal fractions were incubated with heat-inactivated 32 P-prelabeled guinea pig nerve ending membranes as substrate. It is suggested that polyphosphoinositides are under stringent and complex control and that upon receptor activation-mediated stimulation of phosphodiesteratic degradation release of the feedback inhibition shown here may occur and result in the synthesis and replenishment of PIP 2.
人们对多磷酸肌醇重新产生兴趣
DOI: --
发表时间: 1984
期刊:
影响因子: --
作者:
S. Fisher;L. A. A. Rooijen;B. Agranoff
通讯作者: B. Agranoff
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DOI: 10.1016/s0021-9258(18)97109-7
发表时间: 1965
期刊: The Journal of biological chemistry
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作者:
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多磷酸肌醇的分解而不是磷脂酰肌醇的分解解释了大鼠腮腺中毒蕈碱激动剂刺激的肌醇磷脂代谢。
DOI: 10.1042/bj2160633
发表时间: 1983
期刊: The Biochemical journal
影响因子: --
作者:
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DOI: 10.1111/j.1471-4159.1969.tb05989.x
发表时间: 1969
影响因子: 4.7
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通讯作者: J. Hawthorne
腮腺细胞中肌醇磷酸的代谢:对磷酸肌醇作用途径和肌醇三磷酸可能的信使作用的影响。
DOI: 10.1016/0024-3205(84)90006-7
发表时间: 1984
期刊: Life sciences
影响因子: 6.1
作者:
Aub,DL;PutneyJr,JW
通讯作者: PutneyJr,JW