Related Experiment Video
Updated: May 20, 2026
05:57
Synthesizing Amino Acids Modified with Reactive Carbonyls in Silico to Assess Structural Effects Using Molecular Dynamics Simulations
Published on: April 26, 2024
Carnosine: new concept for the function of an old molecule
1International Biotechnological Center of M. V. Lomonosov Moscow State University, 119991 Moscow, Russia.
Biochemistry. Biokhimiia
|July 20, 2012
Summary
This review traces the evolving understanding of carnosine
Area of Science:
- Biochemistry
- Cell Biology
- Physiology
Background:
- Carnosine, first identified in meat in 1900, has a long history of scientific investigation.
- Initial theories viewed carnosine as a simple byproduct of protein breakdown.
- Modern research reveals its complex roles in cellular processes.
Purpose of the Study:
- To provide a historical overview of the research into carnosine's biological functions.
- To highlight the shift in understanding from metabolic end-product to cellular regulator.
- To introduce the potential applications of carnosine in sports and medicine.
Main Methods:
- Literature review of historical and contemporary studies on carnosine.
- Analysis of the conceptual evolution of carnosine's role in metabolism.
- Examination of research demonstrating carnosine's involvement in gene expression.
Main Results:
- Carnosine's biological functions have been progressively elucidated over decades.
- Carnosine is now recognized for its specific role in intracellular signaling in excitable cells.
- Its ability to regulate early response genes positions it as a key cellular peptide regulator.
Conclusions:
- The understanding of carnosine has evolved significantly from its early discovery.
- Carnosine plays a crucial role in cellular signaling and gene regulation.
- Early applications in sports and medicine suggest therapeutic and performance-enhancing potential.
Related Concept Videos
01:35Loss of Carboxy Group as CO2: Decarboxylation of Malonic Acid Derivatives
Just like β-keto acids—which upon thermal decarboxylation form ketones—β-dicarboxylic acids undergo decarboxylation to generate monocarboxylic acids with the liberation of carbon dioxide.
01:18Amino Acid Catabolism
Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
01:25Protein Glycosylation
Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
Glycosylation occurs in...
01:15Carboxylic Acid Derivatives: Overview
Carboxylic acid derivatives are formed by replacing the hydroxyl group of carboxylic acids with a different functional group. The most common carboxylic acid derivatives are:
01:02Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids
Carboxylic acids, upon heating, undergo a decarboxylation reaction by releasing carbon dioxide gas. Monocarboxylic acids do not undergo decarboxylation easily. However, a silver salt of carboxylic acid reacts with bromine or iodine under high temperature to release carbon dioxide gas and forms halide with one less carbon. This reaction is called the Hunsdiecker reaction.
01:29Amino Acid Biosynthetic Pathways
Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which provide...