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Related Concept Videos

Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

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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...
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M-Cdk Drives Transition Into Mitosis02:15

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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.
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M cyclin...
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Epigenetic Regulation01:37

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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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.
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S-Cdk Initiates DNA Replication02:38

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The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
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Related Experiment Video

Updated: Dec 25, 2025

A Simple Method to Identify Kinases That Regulate Embryonic Stem Cell Pluripotency by High-throughput Inhibitor Screening
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Cdk1 Controls Global Epigenetic Landscape in Embryonic Stem Cells.

Wojciech Michowski1, Joel M Chick2, Chen Chu3

  • 1Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA; Department of Oncologic Pathology, Dana-Farber Cancer Institute, Boston, MA 02215, USA.

Molecular Cell
|April 3, 2020
PubMed
Summary
This summary is machine-generated.

Cyclin-dependent kinase 1 (Cdk1) maintains the epigenetic identity of embryonic stem cells (ESCs). Cdk1 phosphorylates key epigenetic regulators, influencing histone modifications and gene expression during differentiation.

Keywords:
analog sensitive kinasecell cyclecyclincyclin dependent kinasedifferentiationembryonic stem cellsepigeneticsphosphoproteomics

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Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues
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Area of Science:

  • Cell Biology
  • Epigenetics
  • Molecular Biology

Background:

  • Cyclin-dependent kinase 1 (Cdk1) is a key regulator of cell division.
  • Embryonic stem cells (ESCs) exhibit high Cdk1 activity, suggesting roles beyond cell cycle progression.
  • Understanding Cdk1's broader functions is crucial for stem cell biology and developmental processes.

Purpose of the Study:

  • To investigate non-canonical functions of Cdk1 in ESCs.
  • To identify Cdk1 substrates involved in epigenetic regulation within ESCs.
  • To elucidate Cdk1's role in maintaining ESC epigenetic identity and its modulation during differentiation.

Main Methods:

  • Generation of knockin mice expressing analog-sensitive Cdk1.
  • Analysis of Cdk1 substrates localized on chromatin in ESCs.
  • Assessment of histone modification changes upon Cdk1 inhibition and during ESC differentiation.

Main Results:

  • A significant portion of Cdk1 substrates in ESCs are chromatin-associated.
  • Cdk1 phosphorylates numerous epigenetic regulators, including histone mark writers and erasers.
  • Cdk1 activity in ESCs partially inactivates Dot1l, a histone methyltransferase, affecting H3K79 methylation.
  • Reduced Cdk1 activity during differentiation de-represses Dot1l, facilitating differentiation gene expression.

Conclusions:

  • Cdk1 plays a critical role in maintaining the epigenetic landscape of ESCs.
  • Cdk1-mediated phosphorylation of epigenetic modifiers like Dot1l is essential for preserving ESC identity.
  • Modulation of Cdk1 activity is integral to the transition from ESCs to differentiated cells, involving epigenetic reprogramming.