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Related Concept Videos

Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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...
Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
Mitochondrial Membranes01:45

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial precursors...

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Related Experiment Video

Updated: Jun 3, 2026

Mitochondrial Respiration Quantification in Yeast Whole Cells
07:15

Mitochondrial Respiration Quantification in Yeast Whole Cells

Published on: November 8, 2024

Mitochondrial protection by resveratrol.

Zoltan Ungvari1, William E Sonntag, Rafael de Cabo

  • 1Reynolds Oklahoma Center on Aging, Departments of Geriatric Medicine and Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, USA. zoltan-ungvari@ouhsc.edu

Exercise and Sport Sciences Reviews
|March 9, 2011
PubMed
Summary

Resveratrol, a plant compound, protects mitochondria and combats aging. This review explores how resveratrol

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Published on: September 16, 2020

Area of Science:

  • Gerontology
  • Molecular Biology
  • Biochemistry

Background:

  • Mitochondrial dysfunction and oxidative stress are key factors in mammalian aging.
  • Dietary restriction is known to have antiaging effects.
  • Resveratrol, a polyphenol, mimics some effects of dietary restriction.

Purpose of the Study:

  • To review the molecular mechanisms of resveratrol's mitochondrial protective effects.
  • To explore resveratrol's potential in preventing age-related diseases.

Main Methods:

  • Literature review of studies on resveratrol, mitochondria, and aging.
  • Analysis of molecular pathways influenced by resveratrol.

Main Results:

  • Resveratrol exhibits significant mitochondrial protective properties.
  • It influences key molecular pathways related to cellular aging.
  • Evidence suggests resveratrol's antiaging potential.

Conclusions:

  • Resveratrol's mitochondrial protective effects warrant further investigation.
  • It holds promise for therapeutic interventions against age-related diseases.
  • Understanding these mechanisms can aid in promoting healthy aging.