Central Carbon Metabolism
Central Carbon Metabolism - Related Videos
08:28
Metabolic Labeling
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2023
Metabolic labeling is used to probe the biochemical transformations and modifications that occur in a cell. This is accomplished by using chemical analogs that mimic the structure of natural biomolecules. Cells utilize analogs in their endogenous biochemical processes, producing compounds that are labeled. The label allows for the incorporation of detection and affinity tags, which can then be used to elucidate metabolic pathways using other biochemical analytical techniques, such as SDS-PAGE...
05:41
Metabolic Profile Analysis of Zebrafish Embryos
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Cited by 42 •
2013
Zebrafish represent a powerful vertebrate model that has been under-utilised for metabolic studies. Here we describe a rapid way to measure the in vivo metabolic profile of developing zebrafish that allows the comparison of different mitochondrial function parameters between genetically or pharmacologically manipulated embryos, thereby increasing the applicability of this organism.
10:19
An Introduction to Cell Metabolism
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2023
In cells, critical molecules are either built by joining together individual units like amino acids or nucleotides, or broken down into smaller components. Respectively, the reactions responsible for this are referred to as anabolic and catabolic. These reactions require or produce energy typically in the form of a “high-energy” molecule called ATP. Together, these processes make up “Cell Metabolism,” and are hallmarks of healthy, living cells.JoVE’s introduction to cell metabolism briefly...
01:14
The Carbon Cycle
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2019
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle. Biological Carbon Cycle All...
04:31
Measurement of Metabolic Rate in Drosophila using Respirometry
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Cited by 51 •
2014
Metabolic disorders are among one of the most common diseases in humans. The genetically tractable model organism D. melanogaster can be used to identify novel genes that regulate metabolism. This paper describes a relatively simple method which allows studying the metabolic rate in flies by measuring their CO2 production.
FAQs
Their connection allows carbon from carbohydrates, lipids, and amino acids to move through alternative biochemical routes rather than remaining confined to one pathway. Enzyme-catalyzed reactions direct intermediates toward energy production, reducing power, or biosynthetic precursors. This coordination helps cells adjust metabolism when nutrient availability or cellular demands change.
Enzymes control the rates and direction of reactions that distribute carbon among linked pathways. Regulation therefore determines whether available nutrients primarily support ATP production, generation of NADH or NADPH, or formation of cellular building blocks. Studying these enzyme-controlled steps reveals how cells balance metabolic outputs instead of treating each pathway as an isolated sequence.
These products support different cellular needs. ATP provides usable energy, whereas NADH and NADPH represent reducing power generated through metabolic reactions. Biosynthetic precursors supply material for constructing cellular components. Distinguishing these outputs helps explain why carbon may be routed through different pathways even when the starting nutrients are similar.
Changes in nutrient availability can alter the direction of carbon flow through the interconnected pathways. Cells may shift how carbohydrates, lipids, or amino acids are processed to maintain energy production, reducing power, or precursor supply. This flexibility supports continued growth and maintenance while allowing metabolism to respond to changing environmental conditions.
A useful analysis follows carbon through the linked pathways, examines how enzyme-catalyzed reactions regulate its distribution, and identifies the resulting ATP, NADH, NADPH, and biosynthetic precursors. Comparing these outputs with nutrient availability and cellular demand helps researchers interpret overall energy balance and metabolic adaptation rather than focusing on one reaction alone.
Examining pathway connections and their regulation can show how altered carbon flow affects energy balance, reducing power, or the supply of biosynthetic precursors. This biochemical perspective helps relate changes in glycolysis, the tricarboxylic acid cycle, or the pentose phosphate pathway to broader metabolic dysfunction, while identifying which cellular outputs may be disrupted.
Environmental changes can modify nutrient availability and cellular demand, requiring coordinated adjustments in carbon processing. Tracking pathway regulation and metabolic outputs shows how cells preserve energy, reducing power, and precursor production under altered conditions. This makes the network relevant for studying adaptation, metabolic flexibility, and the maintenance of cellular function.