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The nuclear phosphoinositide response to stress

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Figures & data

Figure 1. Nuclear PI metabolism.

Phosphatidylinositol (PtdIns) structure and nuclear PI cycle. Sites of phosphorylation on the hydroxyl groups of the inositol head are indicated with yellow stars and carbon atom numbers are shown in red. The nuclear PIs, kinases, phosphatases, and phospholipases are shown as in and . IP3: Ins(1,4,5)P3. PtdIns(4,5)P2 4-Ptase I: Type I PtdIns(4,5)P2 4-phosphatase.
Figure 1. Nuclear PI metabolism.

Figure 2. Abundance of PIs in eukaryotic cells.

Numbers showing here are the estimated percentages of each PI of the total PIs in eukaryotic cells.
Figure 2. Abundance of PIs in eukaryotic cells.

Table 1. Nuclear targeted PIs: types, locations, and response to cell stress

Figure 3. Sub-nuclear localizations of PIs, kinases, phosphatases, phospholipases and PI-binding proteins.

Demonstration of sub-nuclear localizations of PIs, kinases, phosphatases, phospholipases and PI-binding proteins as listed in , , and . IP3: Ins(1,4,5)P3. PtdIns(4,5)P2 4-Ptase I: Type I PtdIns(4,5)P2 4-phosphatase.
Figure 3. Sub-nuclear localizations of PIs, kinases, phosphatases, phospholipases and PI-binding proteins.

Table 2. Nuclear PI-metabolizing enzymes, their substrates, nuclear location and response to cell stress

Table 3. Nuclear PI-binding proteins, their interacting PIs, associated PI enzymes, nuclear location, response to cell stress and functions

Figure 4. Schematic illustration of nuclear PI signaling in response to cellular stress.

In response to cellular stress, the levels of nuclear PI are altered and conversions are induced due to activation of different PI-metabolizing enzymes. Through direct interaction with downstream PI-binding proteins, the PI signals are transduced into changes in cellular functions.
Figure 4. Schematic illustration of nuclear PI signaling in response to cellular stress.

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