Mitochondrial Atp
Mitochondrial Atp - Related Videos
01:31
ATP Yield
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2019
Cellular respiration produces 30 - 32 ATP per glucose molecule. Although most of the ATP results from oxidative phosphorylation and the electron transport chain (ETC), 4 ATP are gained beforehand (2 from glycolysis and 2 from the citric acid cycle). The ETC is embedded in the inner mitochondrial membrane and is comprised of four main protein complexes and an ATP synthase. NADH and FADH2 pass electrons to these complexes, which pump protons into the intermembrane space. This distribution of...
08:32
The ATP Bioluminescence Assay
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2023
In fireflies, the luciferase enzyme converts a compound called luciferin into oxyluciferin, and produces light or “luminescence” as a result. This reaction requires energy derived from ATP in order to proceed, so researchers have exploited the luciferase-luciferin interaction to gauge ATP levels in cells. Given ATP’s role as the cell’s currency of energy, the ATP bioluminescence assay can provide insight into cellular metabolism and overall cell health.In this video, JoVE discusses cellular...
12:22
Ratiometric Biosensors that Measure Mitochondrial Redox State and ATP in Living Yeast Cells
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Cited by 46 •
2013
We describe the use of two ratiometric, genetically encoded biosensors, which are based on GFP, to monitor mitochondrial redox state and ATP levels at subcellular resolution in living yeast cells.
02:59
Animal Mitochondrial Genetics
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2020
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...
01:08
Hydrolysis of ATP
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2019
The bonds of adenosine triphosphate (ATP) can be broken through the addition of water, releasing one or two phosphate groups in an exergonic process called hydrolysis. This reaction liberates the energy in the bonds for use in the cell—for instance, to synthesize proteins from amino acids. If one phosphate group is removed, a molecule of ADP—adenosine diphosphate—remains, along with inorganic phosphate. ADP can be further hydrolyzed to AMP—adenosine monophosphate—by the removal of a second...
FAQs
The proton gradient stores energy by creating a difference in proton concentration across the inner mitochondrial membrane. Protons then move through ATP synthase toward the lower-concentration side, and this movement provides the energy needed to combine ADP with phosphate. The gradient therefore links membrane-based energy storage to ATP production.
Electron transfer through the respiratory chain releases energy in a controlled sequence. Mitochondria use that energy to pump protons into the intermembrane space, establishing the gradient required by ATP synthase. This coupling explains why respiratory-chain activity and ATP production are closely connected rather than functioning as separate energy processes.
Impaired respiration can reduce the energy available for proton pumping, weakening the gradient that drives ATP synthase. As a result, mitochondrial ATP production may fall, limiting the energy supply for processes that depend on ATP. This relationship makes respiratory impairment important in studies of cellular dysfunction and disorders linked to defective respiration.
Measurements of mitochondrial ATP production provide an indication of how effectively mitochondria are performing oxidative phosphorylation. Reduced or altered production can signal impaired respiration, while comparisons across physiological or experimental conditions can reveal changes in cellular energy metabolism. Such measurements help connect mitochondrial activity with broader effects on cell and tissue function.
Mitochondrial ATP measurements can be used to investigate disorders associated with impaired respiration and to evaluate mitochondrial performance under experimental conditions. In drug development, changes in ATP production may help researchers examine how a candidate treatment affects cellular energy metabolism. These applications connect biochemical measurements with disease mechanisms and treatment research.
Tissues require a dependable supply of immediately usable energy to support transport, movement, and biosynthesis. Examining mitochondrial ATP helps researchers relate energy metabolism to how tissues function and how that function changes when respiration is impaired. This perspective is especially useful when linking mitochondrial performance with physiological states or disease-related cellular changes.