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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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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...
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Mitochondrial cAMP signaling.

Fan Zhang1, Liping Zhang2, Yun Qi1

  • 1National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, USA.

Cellular and Molecular Life Sciences : CMLS
|May 29, 2016
PubMed
Summary
This summary is machine-generated.

Cyclic adenosine 3,5-monophosphate (cAMP) is vital for cell functions. Mitochondrial cAMP signaling, compartmentalized within mitochondria, is crucial for cellular homeostasis and stress responses.

Keywords:
AKAPBH3Drp1FissionPKAProtein importTFAMmtDNA

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Cyclic adenosine 3,5-monophosphate (cAMP) acts as a universal second messenger.
  • cAMP signaling is involved in diverse cellular processes including migration, differentiation, proliferation, and apoptosis.
  • cAMP functions extend beyond the plasma membrane to the nucleus and organelles like mitochondria.

Purpose of the Study:

  • To review the current understanding of mitochondrial cAMP signaling.
  • To highlight the importance of cAMP compartmentalization within mitochondria.
  • To summarize the components, functions, and regulation of mitochondrial cAMP signaling.

Main Methods:

  • Literature review of existing research on mitochondrial cAMP.
  • Analysis of studies investigating cAMP signaling cascades within mitochondria.
  • Synthesis of findings on the role of mitochondrial cAMP in cellular processes.

Main Results:

  • Mitochondrial cAMP signaling is essential for maintaining mitochondrial homeostasis.
  • It plays a key role in regulating mitochondrial dynamics and cellular stress responses.
  • Recent research emphasizes the compartmentalization of cAMP signaling within mitochondria.

Conclusions:

  • Mitochondrial cAMP signaling is integral to cytoplasm-mitochondrion communication.
  • Understanding cAMP compartmentalization is critical for interpreting mitochondrial signaling.
  • This review consolidates knowledge on the components, functions, and regulation of mitochondrial cAMP signaling across different mitochondrial compartments.