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Related Concept Videos

Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
Amplifying Signals via Enzymatic Cascade01:22

Amplifying Signals via Enzymatic Cascade

When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze the...
cAMP-dependent Protein Kinase Pathways01:25

cAMP-dependent Protein Kinase Pathways

Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...

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Related Experiment Video

Updated: Jun 29, 2026

Pull-down of Calmodulin-binding Proteins
07:51

Pull-down of Calmodulin-binding Proteins

Published on: January 23, 2012

The Year in Basic Science: calmodulin kinase cascades.

Anthony R Means1

  • 1Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, North Carolina 27710, USA.

Molecular Endocrinology (Baltimore, Md.)
|October 11, 2008
PubMed
Summary
This summary is machine-generated.

Recent research reveals calmodulin kinase cascades

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Published on: January 27, 2012

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Area of Science:

  • Biochemistry and Molecular Biology
  • Cell Signaling
  • Neuroscience

Background:

  • Calmodulin is a key calcium-binding protein in all cells.
  • Calcium-calmodulin complex formation triggers diverse cellular functions.
  • Calmodulin kinase cascades are crucial for various biological processes.

Purpose of the Study:

  • To review significant scientific achievements in calmodulin kinase cascades from the past year.
  • To highlight the newly identified roles of these cascades in biological responses.
  • To explore therapeutic potential for diseases linked to calmodulin signaling.

Main Methods:

  • Literature review of studies published within the last year.
  • Analysis of research on calmodulin kinase pathways.
  • Synthesis of findings related to biological functions and disease implications.

Main Results:

  • Identified calmodulin cascades involved in memory, cell survival, neuronal migration, and metabolism.
  • Defined novel roles for specific calmodulin pathways in biological responses.
  • Demonstrated therapeutic potential for targeting these cascades in type 2 diabetes and obesity.

Conclusions:

  • Calmodulin kinase cascades are central to critical physiological and pathological processes.
  • Further research into these pathways offers significant therapeutic opportunities.
  • Understanding calmodulin signaling is vital for advancing medicine and biology.