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Nitric Oxide Signaling Pathway01:28

Nitric Oxide Signaling Pathway

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Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
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Paracrine signaling allows cells to communicate with their immediate neighbors via secretion of signaling molecules. Such a signal can only trigger a response in nearby target cells because the signal molecules degrade quickly or are inactivated if not taken up. Prominent examples of paracrine signaling include nitric oxide signaling in blood vessels, synaptic signaling of neurons, the blood clotting system, tissue repair/wound healing, and local allergic skin reactions. Nitric oxide as a...
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In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
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Related Experiment Video

Updated: Feb 10, 2026

Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells
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Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells

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Nitric Oxide Signalling in Yeast.

Rika I Astuti1, Ryo Nasuno2, Hiroshi Takagi2

  • 1Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Bogor, Indonesia.

Advances in Microbial Physiology
|May 21, 2018
PubMed
Summary
This summary is machine-generated.

Nitric oxide (NO) is crucial for yeast stress responses, but its signaling pathways remain unclear. This review explores NO metabolism, regulation, and physiological roles in yeast, highlighting its potential in industrial applications.

Keywords:
Nitric oxide detoxificationNitric oxide in yeastNitric oxide metabolismNitric oxide synthesisSmall signalling molecule

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Area of Science:

  • Microbiology
  • Cellular Biology
  • Biochemistry

Background:

  • Nitric oxide (NO) is a conserved signaling molecule in diverse organisms, including yeast.
  • NO homeostasis is vital, as excess NO causes nitrosative stress.
  • Yeast possess NO synthesis (NOS, NIR) and degradation (NOD, GSNOR) systems, but NO signaling mechanisms are poorly understood.

Purpose of the Study:

  • To review nitric oxide (NO) metabolism, including synthesis and degradation, in yeast.
  • To discuss the regulation of NO homeostasis in yeast.
  • To explore the physiological roles of NO in yeast, particularly in stress responses.

Main Methods:

  • Literature review of NO metabolism and signaling in yeast.
  • Analysis of NO synthesis and degradation pathways.
  • Discussion of NO's role in yeast physiology and genetics.

Main Results:

  • Yeast utilize NOS and NIR for NO production and NOD and GSNOR for degradation.
  • NO homeostasis is maintained through a balance of synthesis and degradation.
  • NO plays a role in yeast stress responses, though mechanisms are not fully elucidated.

Conclusions:

  • Understanding NO signaling in yeast is essential for comprehending yeast genetics and physiology.
  • NO signaling in yeast offers potential targets for industrial yeast strain engineering.
  • Further research is needed to clarify the precise mechanisms of NO production and signaling in yeast.