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Amino-Acid Homopolymers Occurring in Nature

Amino-Acid Homopolymers Occurring in Nature

Paperback

Series: Microbiology Monographs, Book 15

BiologyChemistry

ISBN10: 3642264050
ISBN13: 9783642264054
Publisher: Springer Nature
Published: Sep 5 2012
Pages: 250
Weight: 0.57
Height: 0.38 Width: 6.14 Depth: 9.21
Language: English
Microorganisms are capable of producing a wide variety of biopolymers. Homopolymer peptides, which are made up of only a single type of amino acid, are far less ubiquitous. The only two amino-acid homopolymers known to occur in nature are presented in this volume. Poly-epsilon-L-lysine is a polycationic peptide and exhibits antimicrobial activity against a wide spectrum of microorganisms. It is both safe and biodegradable and is therefore used as a food preservative in several countries. In addition, there has been great interest in medical and other applications of poly-lysine and its derivatives. In contrast, poly-gamma-glutamic acid is an unusual anionic polypeptide. It is also water soluble, biodegradable, edible, non-toxic and non-immunogenic and can be chemically modified to introduce various drugs. These features are very useful for pharmaceutical and biomedical applications. Poly-glutamic acid is also a highly attractive as a food ingredient.

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