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Related Concept Videos

Redox Reactions01:27

Redox Reactions

335
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
335
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

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Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
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Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

8.3K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
8.3K
pH Regulation in Cells01:28

pH Regulation in Cells

6.9K
pH plays a critical role in maintaining normal cellular activities. It helps maintain the structure and function of various proteins, dictates the charge on cellular membranes, and is crucial for metabolic reactions inside the cell. Moreover, cells use the energy from the proton motive force to generate ATP.
Cytosolic pH
Under physiological conditions, the cytosolic pH is slightly more acidic than the extracellular pH. However, cells must prevent further acidification of their cytosol to...
6.9K
The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

2.6K
The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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Cellular Redox Profiling Using High-content Microscopy
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Cellular Redox Homeostasis.

Kristell Le Gal1,2, Edward E Schmidt3,4,5, Volkan I Sayin1,2

  • 1Institute of Clinical Sciences, Department of Surgery, Sahlgrenska Center for Cancer Research, University of Gothenburg, 405 30 Gothenburg, Sweden.

Antioxidants (Basel, Switzerland)
|September 28, 2021
PubMed
Summary
This summary is machine-generated.

Cellular redox homeostasis, the balance of cellular reducing and oxidizing reactions, is crucial for biological events. Recent advances illuminate its role in signaling, development, and disease.

Keywords:
ROSantioxidantsglutathionehomeostasisoxidationredoxreductionthioredoxin

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Physiology

Background:

  • Cellular redox homeostasis is a fundamental biological process.
  • Maintaining the balance of reducing and oxidizing reactions is vital for cellular function.
  • Historically, studying redox reactions has been challenging, but new methods are advancing the field.

Purpose of the Study:

  • To provide an overview of redox regulation in cellular signaling, development, and disease.
  • To highlight recent discoveries in the field of redox biology.
  • To enhance understanding of the critical role of redox balance in biological systems.

Main Methods:

  • This is a review article, synthesizing existing literature.
  • It focuses on established and emerging research in redox biology.
  • Key findings from recent studies are discussed.

Main Results:

  • Redox regulation significantly impacts cellular signaling pathways.
  • Disruptions in redox homeostasis are implicated in various diseases.
  • Recent discoveries are expanding our knowledge of redox mechanisms.

Conclusions:

  • Redox homeostasis is a dynamic and essential cellular process.
  • Advances in redox biology offer new insights into health and disease.
  • Further research is crucial for understanding and manipulating redox pathways.