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Related Concept Videos

The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

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...
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...

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Related Experiment Video

Updated: May 9, 2026

Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution
08:37

Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution

Published on: June 1, 2017

I function, therefore I am: overcoming skepticism about mitochondrial supercomplexes.

Antoni Barrientos1, Cristina Ugalde

  • 1Department of Neurology, University of Miami Miller School of Medicine, FL 33136, USA.

Cell Metabolism
|August 13, 2013
PubMed
Summary
This summary is machine-generated.

Mitochondrial respiratory chains form dynamic supercomplexes. Their assembly controls how electrons move through the chain, impacting cellular respiration and energy production.

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Isolation of Mitochondria for Mitochondrial Supercomplex Analysis from Small Tissue and Cell Culture Samples
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Related Experiment Videos

Last Updated: May 9, 2026

Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution
08:37

Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution

Published on: June 1, 2017

Isolation of Mitochondria for Mitochondrial Supercomplex Analysis from Small Tissue and Cell Culture Samples
05:45

Isolation of Mitochondria for Mitochondrial Supercomplex Analysis from Small Tissue and Cell Culture Samples

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Hybrid Clear/Blue Native Electrophoresis for the Separation and Analysis of Mitochondrial Respiratory Chain Supercomplexes
11:25

Hybrid Clear/Blue Native Electrophoresis for the Separation and Analysis of Mitochondrial Respiratory Chain Supercomplexes

Published on: May 19, 2019

Area of Science:

  • Biochemistry
  • Cell Biology
  • Mitochondrial Function

Background:

  • The mitochondrial respiratory chain (MRC) is crucial for cellular energy production.
  • The MRC is thought to organize into supramolecular assemblies called supercomplexes or respirasomes.
  • The precise function of these supercomplexes remains largely unknown.

Purpose of the Study:

  • To investigate the functional role of dynamic supercomplex assembly in the mitochondrial respiratory chain.
  • To determine how supercomplex formation influences electron transport and substrate utilization.

Main Methods:

  • Utilized techniques to analyze the dynamic assembly of respiratory supercomplexes.
  • Investigated the relationship between supercomplex formation and electron flux from various substrates.

Main Results:

  • Demonstrated that the dynamic assembly of supercomplexes is not static.
  • Showed that supercomplex formation directly dictates the flux of electrons through the respiratory chain.
  • Established a link between supercomplex structure and substrate-specific electron transport.

Conclusions:

  • Dynamic supercomplex assembly is a key regulatory mechanism in the mitochondrial respiratory chain.
  • Supercomplex formation plays a critical role in controlling cellular respiration efficiency.
  • Understanding supercomplex dynamics offers insights into mitochondrial energy metabolism.