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Related Concept Videos

B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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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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The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
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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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Positive Regulator Molecules02:39

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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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Positive Regulator Molecules01:45

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Related Experiment Video

Updated: Oct 27, 2025

Identification of Novel CK2 Kinase Substrates Using a Versatile Biochemical Approach
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Protein Kinase CK2 Regulates B Cell Development and Differentiation.

Hairong Wei1, Wei Yang1, Huixian Hong1

  • 1Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL 35294; and.

Journal of Immunology (Baltimore, Md. : 1950)
|July 24, 2021
PubMed
Summary

Protein kinase CK2 (Casein Kinase 2) is crucial for normal B cell development. Its absence leads to altered B cell populations, impacting immune responses and potentially B cell malignancies.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • Protein kinase CK2 (CK2) is a serine/threonine kinase implicated in various cancers, including B cell malignancies.
  • CK2 is known to activate signaling pathways like NF-κB, JAK/STAT, and PI3K/AKT/mTOR, promoting tumor growth.
  • The role of CK2 in normal B cell development and differentiation remains largely unknown.

Purpose of the Study:

  • To investigate the function of CK2α in normal B cell development and differentiation.
  • To determine if CK2α regulates B cell signaling pathways involved in development.

Main Methods:

  • Generation of mice with B cell-specific deletion of CK2α using CD19-driven Cre recombinase.
  • Analysis of B cell populations (transitional, follicular, marginal zone) in knockout mice.
  • Assessment of B cell receptor (BCR) signaling and Notch2 signaling activation.

Main Results:

  • B cell-specific CK2α deficiency resulted in the expansion of marginal zone B cells at the expense of transitional B cells.
  • Transitional B cells require CK2α for maintaining adequate BCR signaling.
  • Loss of CK2α led to reduced BCR signaling and increased Notch2 signaling, promoting marginal zone B cell differentiation.

Conclusions:

  • CK2α plays a critical, previously unrecognized role in regulating B cell development and differentiation.
  • CK2α is essential for proper B cell signaling, influencing the balance between transitional and marginal zone B cell populations.