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Carnosine (beta-alanyl-L-histidine) is a dipeptide molecule, made up of the amino acids beta-alanine and histidine. It is highly concentrated in muscle and brain tissues. [citation needed] Carnosine was discovered by Russian chemist Vladimir Gulevich. [1] Carnosine is naturally produced by the body in the liver [2] from beta-alanine and histidine.
Carnosine is a dipeptide composed of beta-alanine and histidine, and is found in skeletal muscle and cells of the nervous system. [6] This disorder results in an excess of carnosine in the urine, cerebrospinal fluid, blood, and nervous tissue. [7]
Carnosine and metabolic derivatives of carnosine, including NAC, are found in a variety of tissues but particularly muscle tissue. [1] These compounds have varying degrees of activity as free radical scavengers. [1] It has been suggested that NAC is particularly active against lipid peroxidation in the different parts of the lens in the eye. [3]
The researchers said that although carnosine is rapidly degraded by enzymes in the body, it could potentially be an initial treatment for prostate cancer if a constant slow release mechanism is used.
β-Alanine is the rate-limiting precursor of carnosine, which is to say carnosine levels are limited by the amount of available β-alanine, not histidine. [6] Supplementation with β-alanine has been shown to increase the concentration of carnosine in muscles, decrease fatigue in athletes, and increase total muscular work done.
Histidine is also a precursor for carnosine biosynthesis, which is a dipeptide found in skeletal muscle. [27] In Actinomycetota and filamentous fungi, such as Neurospora crassa, histidine can be converted into the antioxidant ergothioneine. [28] Conversion of histidine to histamine by histidine decarboxylase
Carnosine synthase (EC 6.3.2.11) is an enzyme that catalyzes the chemical reaction ATP + L-histidine + beta-alanine ⇌ {\displaystyle \rightleftharpoons } ADP + phosphate + carnosine The 3 substrates of this enzyme are ATP , L-histidine , and beta-alanine , whereas its 3 products are ADP (previously thought to form AMP [ 1 ] ), diphosphate ...
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