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Related Concept Videos

Phase II Reactions: Glutathione Conjugation and Mercapturic Acid Formation01:22

Phase II Reactions: Glutathione Conjugation and Mercapturic Acid Formation

Glutathione, a tripeptide made up of glutamate, cysteine, and glycine, is a critical player in the detoxification of drugs and xenobiotics via a process known as glutathione conjugation or mercapturic acid formation. This phase II biotransformation reaction involves the covalent binding of glutathione to a drug or its metabolite, enhancing the compound's water solubility and enabling its excretion.
Several distinctive characteristics distinguish glutathione conjugation from other phase II...
Nuclear Export01:42

Nuclear Export

The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
Sulfur Assimilation01:20

Sulfur Assimilation

Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
Nuclear Protein Sorting01:34

Nuclear Protein Sorting

Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Nuclear Localization Signals and Import01:46

Nuclear Localization Signals and Import

Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of  2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...

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Related Experiment Video

Updated: May 17, 2026

Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro
03:35

Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro

Published on: June 28, 2024

Nuclear glutathione.

José Luis García-Giménez1, Jelena Markovic, Francisco Dasí

  • 1The Centre for Biomedical Network Research on Rare Diseases, Valencia, Spain.

Biochimica Et Biophysica Acta
|October 17, 2012
PubMed
Summary
This summary is machine-generated.

Glutathione (GSH) acts as a nuclear "redox sensor," maintaining DNA integrity and regulating cell proliferation and death. Its nuclear sequestration is crucial for eukaryotic DNA regulation and chromatin structure.

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Live Imaging of the Mitochondrial Glutathione Redox State in Primary Neurons using a Ratiometric Indicator
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Live Imaging of the Mitochondrial Glutathione Redox State in Primary Neurons using a Ratiometric Indicator

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Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases
14:57

Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases

Published on: October 10, 2020

Related Experiment Videos

Last Updated: May 17, 2026

Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro
03:35

Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro

Published on: June 28, 2024

Live Imaging of the Mitochondrial Glutathione Redox State in Primary Neurons using a Ratiometric Indicator
07:47

Live Imaging of the Mitochondrial Glutathione Redox State in Primary Neurons using a Ratiometric Indicator

Published on: October 20, 2021

Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases
14:57

Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases

Published on: October 10, 2020

Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Glutathione (GSH) is vital for cellular defense against biotic/abiotic stresses.
  • GSH regulates metabolic processes, DNA repair, and cell death.
  • Intracellular GSH partitioning's role in cell regulation is understudied.

Purpose of the Study:

  • To investigate the functions of nuclear glutathione (GSH).
  • To explore GSH's role in regulating the cell cycle and cell death.
  • To highlight GSH's function as a nuclear "redox sensor."

Main Methods:

  • Focus on nuclear GSH functions.
  • Analysis of GSH sequestration in proliferating cells.
  • Review of existing literature on GSH's nuclear roles.

Main Results:

  • Nuclear GSH sequestration suggests conserved eukaryotic DNA regulatory mechanisms.
  • GSH acts as a "redox sensor" during DNA synthesis, maintaining nuclear architecture and DNA integrity.
  • Nuclear GSH influences epigenetic phenomena and nuclear protein degradation.

Conclusions:

  • Nuclear GSH is critical for regulating cell proliferation and death.
  • GSH contributes to chromatin decompaction by maintaining a redox environment.
  • Understanding nuclear GSH partitioning is key to comprehending cell function and signaling.