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Related Concept Videos

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,...
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,...
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,...
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,...
The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

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...
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,...

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Related Experiment Video

Updated: Jun 6, 2026

Robust Mitochondrial Isolation from Rodent Cardiac Tissue
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Robust Mitochondrial Isolation from Rodent Cardiac Tissue

Published on: August 23, 2024

Mitochondrial turnover in the heart.

Roberta A Gottlieb1, Asa B Gustafsson

  • 1BioScience Center, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-4650, USA. robbieg@sciences.sdsu.edu

Biochimica Et Biophysica Acta
|December 15, 2010
PubMed
Summary

Maintaining healthy tissues relies on mitochondrial quality control, a balance between mitochondrial biogenesis and mitophagy. This process selectively removes damaged mitochondria, preserving robust ones for better cellular function.

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Live-imaging of Mitochondrial System in Cultured Astrocytes
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Area of Science:

  • Cell Biology
  • Mitochondrial Biology
  • Autophagy

Background:

  • Mitochondrial quality control is crucial for tissue health.
  • It involves balancing mitochondrial biogenesis and destruction.
  • Mitochondrial dynamics, including fusion and fission, play a role in component redistribution.

Purpose of the Study:

  • To review the regulation of mitochondrial biogenesis and destruction.
  • To examine the machinery involved in mitochondrial turnover.
  • To discuss the biomedical consequences of altered mitochondrial turnover.

Main Methods:

  • This is a review article.
  • It synthesizes existing research on mitochondrial quality control.
  • Key processes discussed include mitochondrial dynamics, mitophagy, and biogenesis.

Main Results:

  • Mitochondrial dynamics may facilitate the segregation of damaged components for removal.
  • Ischemic preconditioning utilizes mitophagy to eliminate damaged mitochondria.
  • This selective elimination results in a population of more resilient mitochondria.

Conclusions:

  • Mitochondrial quality control is essential for maintaining tissue function.
  • Dysregulation of mitochondrial turnover has significant biomedical implications.
  • Understanding these processes is vital for cardioprotection and other fields.