Related Experiment Video

Updated: Jan 4, 2026

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
12:02

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Published on: June 6, 2017

28.2K

CDK5: Key Regulator of Apoptosis and Cell Survival

Rabih Roufayel1, Nimer Murshid1

  • 1College of Engineering and Technology, American University of the Middle East, Kuwait.

Biomedicines
|November 9, 2019
PubMed

Insights

Cyclin-dependent kinase 5 (CDK5), a neuron-specific kinase, regulates cell survival and apoptosis. Its activation by specific proteins like p35 and cyclin I influences gene expression and cell fate.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Cyclin-dependent kinase 5 (CDK5) is a neuron-specific kinase crucial for cellular functions.
  • CDK5 activation relies on interaction with activators such as p35, p39, or p25.
  • Unlike other CDKs, CDK5 is not activated by cyclins D or E.

Purpose of the Study:

  • To elucidate the regulatory mechanisms governing CDK5 activity.
  • To highlight the diverse roles of CDK5 in cellular processes.
  • To explore CDK5's involvement in gene regulation, cell survival, and apoptosis.

Main Methods:

  • Review of existing literature on CDK5 regulation and function.
  • Analysis of CDK5 activator interactions and their structural similarities to cyclins.
  • Examination of CDK5 localization upon activation.
  • Investigation of CDK5's interaction with cyclin I and its impact on apoptosis.

Main Results:

  • CDK5 activation is dependent on specific activators (p35, p39, p25) forming cyclin-like structures.
  • Activated CDK5/p35 complexes localize to the plasma membrane, cytosol, and perinuclear regions.
  • Cyclin I activates CDK5, promoting anti-apoptotic functions via Bcl-2 family protein expression.
  • CDK5 inhibition by roscovitine sensitizes cells to heat-induced apoptosis.

Conclusions:

  • CDK5 plays a significant role in neuronal function, cell survival, and apoptosis.
  • Specific activators and inhibitors modulate CDK5 activity and its downstream effects.
  • Understanding CDK5 regulation is key to comprehending its involvement in critical cellular processes.
Keywords:
CDK5neural apoptosisp25 phosphorylationp35p39

More Related Videos

Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors10:33

Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors

Published on: October 26, 2015

11.7K
Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence10:09

Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence

Published on: January 7, 2019

8.6K

Related Concept Videos

Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
5.5K
Positive Regulator Molecules02:39

Positive Regulator Molecules

Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
6.4K
Positive Regulator Molecules01:45

Positive Regulator Molecules

To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
133.5K
M-Cdk Drives Transition Into Mitosis02:15

M-Cdk Drives Transition Into Mitosis

Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
6.2K
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
38.2K
The Cell Cycle Control System01:28

The Cell Cycle Control System

The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and...
5.2K