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  2. Hydroxyproline - Wikipedia

    en.wikipedia.org/wiki/Hydroxyproline

    Hydroxyproline is a major component of the protein collagen, [3] comprising roughly 13.5% of mammalian collagen. Hydroxyproline and proline play key roles for collagen stability. [4] They permit the sharp twisting of the collagen helix. [5]

  3. Proteinogenic amino acid - Wikipedia

    en.wikipedia.org/wiki/Proteinogenic_amino_acid

    The strong charge makes these two amino acids prone to be located on the outer hydrophilic surfaces of the proteins; when they are found inside, they are usually paired with a corresponding negatively charged amino acid, e.g., aspartate or glutamate. Leucine: L Leu Leu is essential for humans, and behaves similarly to isoleucine and valine ...

  4. Non-proteinogenic amino acids - Wikipedia

    en.wikipedia.org/wiki/Non-proteinogenic_amino_acids

    Lysine. Technically, any organic compound with an amine (–NH 2) and a carboxylic acid (–COOH) functional group is an amino acid. The proteinogenic amino acids are a small subset of this group that possess a central carbon atom (α- or 2-) bearing an amino group, a carboxyl group, a side chain and an α-hydrogen levo conformation, with the exception of glycine, which is achiral, and proline ...

  5. Secondary amino acid - Wikipedia

    en.wikipedia.org/wiki/Secondary_amino_acid

    It suggested that acyclic secondary amino acids are more flexible than cyclic secondary amino acids in protein by replacement of pipecolic acid by N-methyl-L-alanine in efrapeptin C. [1] Ninhydrin tests of proline and hydroxyproline give yellow results. In enzymology, a N-methyl-L-amino-acid oxidase is an oxidase of a subtype of secondary amino ...

  6. Pyrroline-5-carboxylate reductase - Wikipedia

    en.wikipedia.org/wiki/Pyrroline-5-carboxylate...

    The systematic name of this enzyme class is L-proline:NAD(P)+ 5-oxidoreductase. Other names in common use include proline oxidase, L-proline oxidase, 1-pyrroline-5-carboxylate reductase, NADPH-L-Delta1-pyrroline carboxylic acid reductase, and L-proline-NAD(P)+ 5-oxidoreductase. This enzyme participates in arginine and proline metabolism.

  7. Glutamate-5-semialdehyde - Wikipedia

    en.wikipedia.org/wiki/Glutamate-5-semialdehyde

    Glutamate-5-semialdehyde is a non-proteinogenic amino acid involved in both the biosynthesis and degradation of proline and arginine (via ornithine), [1] [2] as well as in the biosynthesis of antibiotics, such as carbapenems. It is synthesized by the reduction of glutamyl-5-phosphate by glutamate-5-semialdehyde dehydrogenase.

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