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Related Concept Videos

Mitochondrial Membranes01:45

Mitochondrial Membranes

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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,...
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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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Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

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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...
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Mitochondria01:37

Mitochondria

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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,...
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Regulation of Metabolism01:19

Regulation of Metabolism

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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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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,...
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Related Experiment Video

Updated: Aug 9, 2025

Experimental Protocol for Detecting Mitochondrial Function in Hepatocytes Exposed to Organochlorine Pesticides
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Mitochondrial Modulators: The Defender.

Emmanuel Makinde1, Linlin Ma1, George D Mellick1

  • 1Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia.

Biomolecules
|February 25, 2023
PubMed
Summary
This summary is machine-generated.

Mitochondria are vital cell powerhouses involved in energy, calcium, and ROS balance. This review explores protective compounds for mitochondrial health and disease treatment.

Keywords:
compoundsmitochondria diseasesmitochondria dysfunctionmitochondria health

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Mitochondrial Medicine

Background:

  • Mitochondria, the cell's powerhouses, are crucial for ATP production via oxidative phosphorylation.
  • Beyond energy, they regulate calcium homeostasis, reactive oxygen species (ROS) balance, and apoptosis.
  • Mitochondria are central to biosynthetic pathways for fatty acids, cholesterol, amino acids, glucose, and heme.

Purpose of the Study:

  • To review the physiological and pathological roles of mitochondria.
  • To present bioactive compounds with protective effects on mitochondria.
  • To discuss challenges and solutions for therapeutic applications of mitochondrial modulators.

Main Methods:

  • Literature review of mitochondrial functions.
  • Analysis of bioactive compounds targeting mitochondrial pathways.
  • Discussion of therapeutic potential and limitations.

Main Results:

  • Mitochondrial dysfunction is implicated in neurodegenerative diseases, cancer, and metabolic disorders.
  • Several bioactive compounds demonstrate protective effects on mitochondria.
  • Therapeutic application of these compounds faces challenges, including delivery and specificity.

Conclusions:

  • Mitochondria are critical for cellular health, and their dysfunction contributes to various diseases.
  • Bioactive compounds offer therapeutic potential for mitochondrial disorders.
  • Further research is needed to overcome limitations and develop effective mitochondrial therapies.