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PP2A as a master regulator of the cell cycle
Nathan Wlodarchak1, Yongna Xing1
1a McArdle Laboratory for Cancer Research, University of Wisconsin-Madison , Madison , WI , USA.
Critical Reviews in Biochemistry and Molecular Biology
|February 25, 2016
Summary
Protein phosphatase 2A (PP2A) regulates the cell cycle by dephosphorylating numerous substrates. This review details PP2A
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Protein phosphatase 2A (PP2A) is a key regulator of cellular processes.
- It dephosphorylates over 300 substrates crucial for cell cycle progression.
- PP2A functions through distinct holoenzyme families, spatially and temporally regulated.
Purpose of the Study:
- To review the role of PP2A in cell cycle regulation.
- To examine PP2A's involvement in Wnt, mTOR, and MAP kinase signaling pathways.
- To highlight PP2A's function in G1→S transition, DNA synthesis, and mitotic initiation.
Main Methods:
- Literature review of PP2A's role in cell cycle.
- Analysis of PP2A's involvement in key signaling pathways.
- Examination of PP2A's function in cell cycle transitions and DNA synthesis.
Main Results:
- PP2A regulates multiple cell cycle pathways and checkpoints.
- Specific PP2A holoenzymes and regulators are critical for its diverse functions.
- PP2A is implicated in Wnt, mTOR, and MAP kinase signaling pathways.
Conclusions:
- PP2A is essential for cell cycle control, impacting survival and proliferation.
- Dysregulation of PP2A is linked to cancer and other diseases.
- Understanding PP2A's regulatory mechanisms offers therapeutic potential.
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