Download Amino-Acid Homopolymers Occurring in Nature by Munenori Takehara, Hideo Hirohara (auth.), Yoshimitsu Hamano PDF

By Munenori Takehara, Hideo Hirohara (auth.), Yoshimitsu Hamano (eds.)

Microorganisms are in a position to generating a large choice of biopolymers. Homopolymer peptides, that are made of just a unmarried kind of amino acid, are a long way much less ubiquitous. the one amino-acid homopolymers recognized to happen in nature are awarded during this quantity. Poly-epsilon-L-lysine is a polycationic peptide and shows antimicrobial job opposed to a large spectrum of microorganisms. it truly is either secure and biodegradable and is for this reason used as a nutrition preservative in different nations. moreover, there was nice curiosity in scientific and different purposes of poly-lysine and its derivatives. against this, poly-gamma-glutamic acid is an strange anionic polypeptide. it's also water soluble, biodegradable, fit for human consumption, non-toxic and non-immunogenic and will be chemically changed to introduce a variety of medications. those positive factors are very beneficial for pharmaceutical and biomedical purposes. Poly-glutamic acid is additionally a hugely appealing as meals ingredient.

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Extra resources for Amino-Acid Homopolymers Occurring in Nature

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57 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Abstract Poly-e-L-lysine (e-poly-L-lysine, e-PL) is used as a food additive on the basis of its strong antimicrobial activity (Fine chem 29:18–25, 2000). e-PL is industrially produced by fermentation process using Streptomyces albulus. Recently, the biosynthetic mechanism (Nat Chem Biol 4:766–772, 2008) and microbial degradation of e-PL (FEMS Microbiol Lett 207:147–151, 2002; Arch Microbiol 178:325–330, 2002; J Biosci Bioeng 96:92–94, 2003; Appl Microbiol Biotechnol 72:173–181, 2006) have been reported.

The order and number of modules of a NRPS system determine the sequence and length of the Biochemistry and Enzymology of Poly-Epsilon-L-Lysine Biosynthesis 31 peptide product. It has been reported that e-PL might be produced by NRPSs using a thiotemplate mechanism (Kawai et al. 2003; Saimura et al. 2008). However, as they used the crude extract of an e-PL-producing microorganism, it was not possible to confirm the biosynthetic mechanism. Additionally, the chain-length diversity of e-PL products is difficult to explain with this generic model.

57 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Abstract Poly-e-L-lysine (e-poly-L-lysine, e-PL) is used as a food additive on the basis of its strong antimicrobial activity (Fine chem 29:18–25, 2000). e-PL is industrially produced by fermentation process using Streptomyces albulus. Recently, the biosynthetic mechanism (Nat Chem Biol 4:766–772, 2008) and microbial degradation of e-PL (FEMS Microbiol Lett 207:147–151, 2002; Arch Microbiol 178:325–330, 2002; J Biosci Bioeng 96:92–94, 2003; Appl Microbiol Biotechnol 72:173–181, 2006) have been reported.

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