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Updated: Dec 31, 2025

Fluorescence-Based Measurements of Phosphatidylserine/Phosphatidylinositol 4-Phosphate Exchange Between Membranes
Published on: March 14, 2021
The nuclear phosphoinositide response to stress
Mo Chen1, Tianmu Wen1, Hudson T Horn1
1School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA.
Nuclear phosphoinositides (PIs) are key signaling hubs regulating nuclear protein activity. This review details how PIs and their associated proteins orchestrate cellular stress responses within the nucleus.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Nuclear phosphoinositides (PIs) act as critical signaling hubs.
- PIs regulate nuclear protein activity and diverse nuclear processes.
- Cellular stress induces nuclear PI accumulation and synthesis of various PI isomers.
Purpose of the Study:
- To review nuclear phosphoinositide signaling in sub-nuclear compartments.
- To summarize the roles of PI-metabolizing enzymes in nuclear PI signaling.
- To discuss PI-protein complexes and their functions in regulating effector proteins.
Main Methods:
- Literature review and synthesis of existing research.
- Analysis of PI metabolism and signaling pathways.
- Examination of PI-protein interactions and their functional consequences.
Main Results:
- Nuclear PIs are synthesized by specific kinases, phosphatases, and phospholipases.
- PIs interact with effector proteins, modulating their configuration, stability, and transcription activity.
- Specific PI isomers play distinct roles in nuclear processes.
Conclusions:
- Nuclear phosphoinositide signaling is a complex network crucial for cellular stress response.
- Understanding the nuclear PI-protein interactome is vital for comprehending coordinated cellular defense mechanisms.
- This review provides a comprehensive overview of nuclear PI signaling and its impact on cellular functions.
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