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Redox Reactions

Redox Reactions

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...

Redox Reactions

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...

Protein Modifications in the RER

Protein Modifications in the RER

Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.

Oxidation and Reduction of Organic Molecules

Oxidation and Reduction of Organic Molecules

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.
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The Calvin Benson Cycle

The Calvin Benson Cycle

Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...

Covalently Linked Protein Regulators

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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.

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Related Experiment Video

Updated: May 16, 2026

Profiling Thiol Redox Proteome Using Isotope Tagging Mass Spectrometry

Profiling Thiol Redox Proteome Using Isotope Tagging Mass Spectrometry

Published on: March 24, 2012

Modulating protein function through reversible oxidation: Redox-mediated processes in plants revealed through

Natalia V Bykova¹, Christof Rampitsch

¹Cereal Research Centre, Agriculture and AgriFood Canada, 195 Dafoe Road, Winnipeg, Manitoba, Canada. bykovan@agr.gc.ca

|December 1, 2012

Summary

This summary is machine-generated.

Plants use redox control to manage cellular metabolism and energy. Proteomics reveals how protein oxidation integrates with signaling pathways, impacting stress responses and plant health.

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Profiling Thiol Redox Proteome Using Isotope Tagging Mass Spectrometry

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Published on: March 24, 2012

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Area of Science:

Plant Biology
Biochemistry
Molecular Biology

Background:

Cellular metabolism and energy balance are tightly regulated by plant redox control.
Steady-state redox levels are intrinsically linked to cellular metabolic pathways.
Proteomics provides advanced tools to study protein oxidation and its role in cellular regulation.

Purpose of the Study:

To review the application of proteomics techniques in understanding plant redox signaling.
To explore the integration of the redox network with other cellular signaling pathways.
To highlight key plant redox proteomics studies focusing on stress responses and regulation.

Main Methods:

Utilizing various proteomics techniques to analyze protein oxidation.
Investigating reversible protein modifications.
Examining cellular responses to oxidative and nitrosative stress.

Main Results:

Proteomics demonstrates the integration of the redox network with phytohormone signaling (jasmonic, salicylic, abscisic acids, ethylene) and other pathways (Ca(2+), protein phosphorylation).
Studies reveal the crucial role of redox signaling in plant defense against pathogens.
Proteomics elucidates cellular redox responses and regulatory mechanisms.

Conclusions:

Proteomics is a powerful approach for dissecting plant redox signaling networks.
Understanding redox regulation is key to metabolic homeostasis, energy balance, and stress resilience in plants.
Further research in plant redox proteomics will advance our knowledge of plant physiology and defense mechanisms.