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Published on: August 13, 2017
Roles and regulation of serine/threonine-specific protein phosphatases in the cell cycle
1Division of Hematology/Oncology, Childrens Hospital Los Angeles, 4650 Sunset Boulevard, Los Angeles, CA 90027, USA.
Abstract:
As cell cycle research enters its fourth decade, multiple protein kinases are firmly established as key regulators of the cell cycle, and some of them have emerged as promising drug targets. This review will discuss the serine/threonine-specific protein phosphatases that oppose the actions of protein kinases. Typically, a phosphatase may stimulate one cell cycle transition, and inhibit another; alternatively, two different phosphatase holoenzymes may have opposing effects on the same cell cycle transition. Thus, both activation and inhibition of these enzymes could result in cell cycle arrest and/or apoptosis. Specific findings, the challenges and approaches to exploit this potential will be discussed.
Insights
Protein phosphatases, which oppose protein kinases, are key regulators of the cell cycle. Their activation or inhibition can lead to cell cycle arrest and apoptosis, presenting potential drug targets.
Area of Science:
- Cell biology
- Molecular biology
- Biochemistry
Background:
- Protein kinases are established regulators of the cell cycle and are pursued as drug targets.
- Protein phosphatases counteract the actions of protein kinases in cell cycle regulation.
- The dual role of phosphatases in stimulating or inhibiting cell cycle transitions is complex.
Purpose of the Study:
- To review the role of serine/threonine-specific protein phosphatases in cell cycle regulation.
- To discuss the potential of protein phosphatases as therapeutic targets.
- To explore the challenges and strategies for exploiting phosphatases in drug development.
Main Methods:
- Literature review of cell cycle research.
- Analysis of the regulatory mechanisms of protein phosphatases.
- Discussion of findings related to phosphatase activity and cell cycle outcomes.
Main Results:
- Protein phosphatases play critical roles in both promoting and inhibiting cell cycle progression.
- Different phosphatase holoenzymes can have opposing effects on the same cell cycle transition.
- Modulating phosphatase activity can induce cell cycle arrest or apoptosis.
Conclusions:
- Protein phosphatases are crucial, yet complex, regulators of the cell cycle.
- Targeting protein phosphatases offers a promising avenue for cancer therapy and other applications.
- Further research is needed to overcome challenges in developing phosphatase-targeting drugs.
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