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Related Concept Videos

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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Electron Transport Chains01:28

Electron Transport Chains

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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
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Peroxisomes and Mitochondria01:30

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Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
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Animal Mitochondrial Genetics02:59

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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

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The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
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Energy to Drive Translocation01:37

Energy to Drive Translocation

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Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
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Related Experiment Video

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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
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Mitochondria: It is all about energy.

Amaloha Casanova1,2,3,4, Anne Wevers1,2,3,4, Santiago Navarro-Ledesma1,2,3,4

  • 1Department of Physiotherapy, University of Granada, Granada, Spain.

Frontiers in Physiology
|May 14, 2023
PubMed
Summary

Mitochondria are central to health and disease, influencing numerous bodily functions beyond energy. Understanding mitochondrial mechanisms offers a root-cause approach to treating chronic diseases like cancer and neurodegenerative disorders.

Keywords:
hormesismitochondriamitochondrial dysfunctionmitochondrial hormesismitochondrial metabolism

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Area of Science:

  • Cellular Biology
  • Mitochondrial Biology
  • Integrative Medicine

Background:

  • Mitochondria are vital for cellular functions beyond energy production, including homeostasis and signaling.
  • They interact with circadian clocks, gut microbiota, and the immune system, potentially acting as a central hub.
  • Mitochondrial dysfunction is implicated in various chronic diseases.

Purpose of the Study:

  • To review mitochondrial mechanisms in health and disease.
  • To explore pathways of mitochondrial dysregulation.
  • To identify strategies for recovering mitochondrial function.

Main Methods:

  • Literature review focusing on mitochondrial mechanisms.
  • Analysis of evolutionary adaptations influencing mitochondria.
  • Discussion of disease-specific mitochondrial roles.

Main Results:

  • Mitochondria are involved in complex cellular communication and homeostasis.
  • Mitochondrial dysfunction is a common factor in metabolic, neuronal, cardiovascular, and inflammatory diseases.
  • Evolutionary adaptations highlight the plasticity and resilience of mitochondria.

Conclusions:

  • Mitochondria are a critical link between health and disease.
  • Understanding mitochondrial mechanisms is key to developing root-cause treatments.
  • Strategies targeting mitochondrial health can improve outcomes for chronic diseases.