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Related Concept Videos

Redox Reactions01:27

Redox Reactions

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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...
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Redox Reactions01:24

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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...
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The Supercomplexes in the Crista Membrane01:41

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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 Components01:29

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The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...
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Redox Equilibria: Overview01:23

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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Oxidation and Reduction of Organic Molecules01:19

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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.
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Updated: Apr 18, 2026

Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry
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Redox meets protein trafficking.

Bettina Bölter1, Jürgen Soll1, Serena Schwenkert1

  • 1Department Biologie I-Botanik, Ludwig-Maximilians-Universität, Großhadernerstr. 2-4, D-82152 Planegg-Martinsried, Germany; Munich Center for Integrated Protein Science CiPSM, Ludwig-Maximilians-Universität, Feodor-Lynen-Strasse 25, D-81377 Munich, Germany.

Biochimica Et Biophysica Acta
|January 28, 2015
PubMed
Summary
This summary is machine-generated.

Eukaryotic cells regulate organelle protein import to adapt to changing conditions. This import is integrated with the cellular redox network for short-term acclimation and communication.

Keywords:
ChloroplastsProtein transportRedox regulation

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Area of Science:

  • Cell Biology
  • Organelle Biogenesis
  • Plant Physiology

Background:

  • Eukaryotic cells evolved from engulfing prokaryotes, requiring integration of organelles like chloroplasts and mitochondria.
  • Efficient functioning of organelles necessitates sophisticated regulatory mechanisms for cellular processes.
  • Post-translational import of nuclear-encoded organellar proteins is crucial for plant adaptation.

Purpose of the Study:

  • To explore how eukaryotic cells regulate organellar protein import.
  • To understand the short-term acclimation mechanisms for protein import.
  • To investigate the integration of protein import into the cellular redox network.

Main Methods:

  • Analysis of regulatory mechanisms for organellar protein import.
  • Investigation of signal recognition from within organelles.
  • Examination of translocon complex modification in response to cellular needs.

Main Results:

  • Protein import demand varies with environmental conditions, stimuli, and developmental stages.
  • Short-term acclimation is achieved by integrating protein import into the cellular redox network.
  • Signals from organelles modulate translocon complex efficiency to communicate cellular requirements.

Conclusions:

  • The cellular redox network plays a vital role in dynamically regulating organellar protein import.
  • Short-term acclimation of protein import ensures cellular homeostasis under varying conditions.
  • This integrated system facilitates communication of cellular requirements throughout the plant organism.