An overview on d-amino acids

An overview on d-amino acids More than half a century ago researchers thought that d-amino acids had a minor function compared to l-enantiomers in biological processes. Many evidences have shown that d-amino acids are present in high concentration in microorganisms, plants, mammals and humans and fulfil specific biological functions. In the brain of mammals, d-serine (d-Ser) acts as a co-agonist of the N-methyl-d-aspartate (NMDA)-type glutamate receptors, responsible for learning, memory and behaviour. d-Ser metabolism is relevant for disorders associated with an altered function of the NMDA receptor, such as schizophrenia, ischemia, epilepsy and neurodegenerative disorders. On the other hand, d-aspartate (d-Asp) is one of the major regulators of adult neurogenesis and plays an important role in the development of endocrine function. d-Asp is present in the neuroendocrine and endocrine tissues and testes, and regulates the synthesis and secretion of hormones and spermatogenesis. Also food proteins contain d-amino acids that are naturally originated or processing-induced under conditions such as high temperatures, acid and alkali treatments and fermentation processes. The presence of d-amino acids in dairy products denotes thermal and alkaline treatments and microbial contamination. Two enzymes are involved in the metabolism of d-amino acids: amino acid racemase in the synthesis and d-amino acid oxidase in the degradation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Amino Acids Springer Journals

An overview on d-amino acids

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Publisher
Springer Vienna
Copyright
Copyright © 2017 by Springer-Verlag GmbH Austria
Subject
Life Sciences; Biochemistry, general; Analytical Chemistry; Biochemical Engineering; Life Sciences, general; Proteomics; Neurobiology
ISSN
0939-4451
eISSN
1438-2199
D.O.I.
10.1007/s00726-017-2459-5
Publisher site
See Article on Publisher Site

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