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Related Concept Videos

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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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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,...
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Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
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MR Molecular Imaging of Prostate Cancer with a Small Molecular CLT1 Peptide Targeted Contrast Agent
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The C-peptide signaling.

George Grunberger1, Anders A F Sima

  • 1Grunberger Diabetes Institute, Bloomfield Hills, Michigan 48302, USA.

Experimental Diabesity Research
|June 17, 2004
PubMed
Summary
This summary is machine-generated.

C-peptide, a byproduct of insulin biosynthesis, has a significant physiologic role. Studies show C-peptide influences intracellular processes and insulin signal transduction pathways, challenging previous assumptions.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Endocrinology

Background:

  • Historically, C-peptide was considered a byproduct of insulin biosynthesis with no significant physiological function.
  • Recent research suggests C-peptide plays a crucial role in various biological processes.

Purpose of the Study:

  • To re-evaluate the physiological role of C-peptide.
  • To elucidate the molecular mechanisms underlying C-peptide's effects on intracellular processes.
  • To investigate C-peptide's impact on insulin signal transduction pathways.

Main Methods:

  • Review of existing studies on C-peptide's molecular effects in different cell systems and tissues.
  • Experimental investigation of C-peptide's influence on distinct elements of insulin signal transduction pathways.
  • Utilizing various cell systems and tissues to demonstrate C-peptide's effects.

Main Results:

  • C-peptide directly interacts with cell-surface receptors or related membrane entities.
  • C-peptide exerts unique effects on several intracellular processes.
  • C-peptide influences distinct elements of the insulin signal transduction pathways, even without a purified receptor.

Conclusions:

  • C-peptide possesses significant physiological functions beyond being a mere byproduct of insulin biosynthesis.
  • C-peptide's molecular effects involve interactions with cell surface components and modulation of intracellular signaling.
  • Further research is warranted to fully understand C-peptide's role in metabolic regulation and disease.