Supercomplex Assessment
Supercomplex Assessment - Related Videos
08:37
Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution
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Cited by 15 •
2017
This protocol describes the separation of functional mitochondrial electron transport chain complexes (Cx) I-V and supercomplexes thereof using native electrophoresis to reveal information about their assembly and structure. The native gel can be subjected to immunoblotting, in-gel assays, and purification by electroelution to further characterize individual complexes.
01:41
The Supercomplexes in the Crista Membrane
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2023
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...
05:45
Isolation of Mitochondria for Mitochondrial Supercomplex Analysis from Small Tissue and Cell Culture Samples
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Cited by 2 •
2024
This protocol describes a technique for the analysis of respiratory supercomplexes when only small amounts of samples are available.
11:25
Hybrid Clear/Blue Native Electrophoresis for the Separation and Analysis of Mitochondrial Respiratory Chain Supercomplexes
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Cited by 7 •
2019
Here we present a protocol to extract, resolve and identify mitochondrial supercomplexes which minimizes exposure to detergents and Coomassie Blue. This protocol offers an optimal balance between resolution, and preservation of enzyme activities, while minimizing the risk of losing labile protein-protein interactions.
08:36
Neurotoxicity Assessment in Adult Danio rerio using a Battery of Behavioral Tests in a Single Tank
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Cited by 3 •
2023
Here, we present a comprehensive behavioral test battery, including the novel tank, Shoaling, and social preference tests, to effectively determine the potential neurotoxic effects of chemicals (e.g., methamphetamine and glyphosate) on adult zebrafish using a single tank. This method is relevant to neurotoxicity and environmental research.
FAQs
The key distinction comes from how assemblies behave during separation under native conditions. Assemblies that remain associated can be evaluated as stable higher-order structures, whereas disrupted associations may indicate transient interactions. Comparing detected composition and activity under these conditions helps connect physical stability with functional significance.
Assessment focuses on several complementary features: composition identifies the participating protein complexes, organization describes their higher-order arrangement, and stability indicates how persistently they associate. Measurements of enzymatic activity add a functional dimension, helping determine whether the observed assembly has a relationship to electron transport or ATP-producing pathways.
Oxidative phosphorylation depends on coordinated electron transport and ATP production within energy-converting membranes. Examining associations among the relevant complexes can reveal functional relationships that are not apparent when each complex is considered separately. This perspective supports biochemical interpretation of membrane bioenergetics and helps evaluate how higher-order organization relates to energy conversion.
A typical workflow begins by separating membrane protein assemblies under native conditions so their associations can be examined. Researchers then characterize the separated material through immunodetection, mass spectrometry, structural analysis, or enzymatic activity measurements. Using several readouts helps compare composition, organization, stability, and function rather than relying on a single type of evidence.
Immunodetection can establish whether selected protein complexes are present within separated assemblies, while mass spectrometry can provide broader information about their molecular composition. These approaches address related but distinct questions. Combining them with structural analysis or enzymatic activity measurements strengthens interpretation of which components associate and whether the association has functional relevance.
The approach is useful when researchers need to examine respiratory-chain organization, membrane bioenergetics, or changes associated with disease. Comparing supercomplex composition, stability, structure, or activity across conditions can indicate whether mitochondrial higher-order assemblies are altered. Such findings help relate biochemical organization to changes in oxidative phosphorylation without assuming that every detected association is a stable functional unit.