Protein Metabolism
Protein Metabolism - Related Videos
01:21
Overview of Protein Metabolism
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2024
Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted. Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
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...
14:44
A Protocol for the Identification of Protein-protein Interactions Based on 15N Metabolic Labeling, Immunoprecipitation, Quantitative Mass Spectrometry and Affinity Modulation
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Cited by 9 •
2012
We present a variation of the QUICK (QUantitative Immunoprecipitation Combined with Knockdown) approach that was introduced previously to distinguish between true and false protein-protein interactions. Our approach is based on 15N metabolic labeling, the modulation of affinities of protein-protein interactions by the presence/absence of ATP, immunoprecipitation, and quantitative mass spectrometry.
FAQs
Gene expression provides the instructions for producing proteins, while translation converts those instructions into protein molecules. Enzymes then regulate protein modification, transport, degradation, and amino acid catabolism. This coordination allows cells to adjust protein production and removal according to functional demands, helping maintain cellular structure and respond to changing nutritional or physiological conditions.
Cellular needs and protein condition influence these decisions. Cells produce proteins through gene expression and translation when functional molecules are required, modify or transport them to support their roles, and activate proteolysis when proteins are damaged or no longer needed. Amino acid catabolism can increase when amino acids must contribute to metabolic fuel or energy balance.
Balanced synthesis and degradation allow cells and tissues to replace damaged components without losing essential proteins. This balance supports growth and tissue repair while helping regulate energy use and nitrogen balance. If protein production or breakdown becomes poorly controlled, cellular function and broader physiological responses may be affected, contributing to metabolic disorders or disease.
Analysis of protein metabolism can show how cells produce and replace proteins during growth, maintenance, and tissue repair. It also helps connect protein turnover with nitrogen balance and energy management. These relationships give biology researchers a framework for interpreting how tissues respond to nutritional changes, physiological stress, or altered cellular regulation.
In nutrition research, protein metabolism helps explain how cells manage amino acids, nitrogen balance, and energy under different nutritional conditions. Medical researchers examine the same processes to investigate metabolic disorders and disease. The topic therefore links cellular protein regulation with organism-level concerns involving tissue maintenance, physiological stress, and disrupted metabolism.
Physiological stress can change the cellular demand for protein production, degradation, and amino acid use. Examining these responses helps researchers understand how cells maintain function when conditions change, including shifts in energy requirements or tissue maintenance. This perspective connects molecular regulation with outcomes such as altered growth, repair, nitrogen balance, and disease-related metabolic disruption.