The chemistry and biology of phosphatidylinositol 4-phosphate at the plasma membrane.

The chemistry and biology of phosphatidylinositol 4-phosphate at the plasma membrane.
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DOI:
10.1016/j.bmc.2021.116190
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发表时间:
2021-06-15
影响因子:
3.5
通讯作者:
Baskin JM
Baskin JM
中科院分区:
医学3区
文献类型:
--
作者:
Batrouni AG;Baskin JM

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Phosphoinositides are an important class of anionic, low abundance signaling lipids distributed throughout intracellular membranes. The plasma membrane contains three phosphoinositides: PI(4)P, PI(4,5)P2, and PI(3,4,5)P3. Of these, PI(4)P has remained the most mysterious, despite its characterization in this membrane more than a half-century ago. Fortunately, recent methodological innovations at the chemistry–biology interface have spurred a renaissance of interest in PI(4)P. Here, we describe these new toolsets and how they have revealed novel functions for the plasma membrane PI(4)P pool. We examine high-resolution structural characterization of the plasma membrane PI 4-kinase complex that produces PI(4)P, tools for modulating PI(4)P levels including isoform-selective PI 4-kinase inhibitors, and fluorescent probes for visualizing PI(4)P. Collectively, these chemical and biochemical approaches have revealed insights into how cells regulate synthesis of PI(4)P and its downstream metabolites as well as new roles for plasma membrane PI(4)P in non-vesicular lipid transport, membrane homeostasis and trafficking, and cell signaling pathways.
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