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

Microorganisms are able to generating a wide selection of biopolymers. Homopolymer peptides, that are made from just a unmarried kind of amino acid, are a ways much less ubiquitous. the single amino-acid homopolymers identified to ensue in nature are awarded during this quantity. Poly-epsilon-L-lysine is a polycationic peptide and indicates antimicrobial task opposed to a large spectrum of microorganisms. it really is either secure and biodegradable and is for that reason used as a nutrients preservative in numerous 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, safe to eat, non-toxic and non-immunogenic and will be chemically transformed to introduce quite a few medicinal drugs. those positive factors are very important for pharmaceutical and biomedical functions. Poly-glutamic acid is additionally a hugely beautiful as nutrients ingredient.

Show description

Read or Download Amino-Acid Homopolymers Occurring in Nature PDF

Best microbiology books

Plant Endocytosis (Plant Cell Monographs, Volume 1)

Endocytosis is a basic organic approach, that is conserved between all eukaryotes. it truly is crucial not just for lots of physiological and signalling methods but additionally for interactions among eukaryotic cells and pathogens or symbionts. This publication covers all facets of endocytosis in either decrease and better crops, together with uncomplicated different types of endocytosis, endocytic cubicles, and molecules thinking about endocytic internalization and recycling in assorted plant mobile forms.

Clinical Microbiology Made Ridiculously Simple, Edition 3

(Currently in 2004 revised printing) a quick, transparent, thorough, and hugely stress-free method of scientific microbiology, brimming with mnemonics, humor, precis charts and illustrations, from AIDS to "flesh-eating micro organism" to ebola, mad cow ailment, hantavirus, anthrax, smallpox, botulism, and so on. first-class Board assessment.

High-Yield Histology (High-Yield)

Now in its up-to-date 3rd variation, High-Yield™ Histology extracts crucial details on histology and offers it in a concise, uncluttered type to organize scholars for the USMLE. The ebook additionally serves as a good direction evaluation, with illustrations and countless numbers of overview questions. High-Yield™ potential precisely that.

Handbook of Arbuscular Mycorrhizal Fungi

Arbuscular mycorrhizal fungi are obligate root symbionts that effect plant development, productiveness and competitiveness. The e-book integrates key information regarding AMF thoughts, constructions and capabilities, and the hot category of Glomeromycota, together with subject matters approximately AMF historical past and evolution, AMF households, genus and species description, in addition to a compilation approximately a number of protocols to evaluate AMF and the way to spot them.

Extra info for Amino-Acid Homopolymers Occurring in Nature

Example text

Have reported that the L-lysine molecule is directly utilized in e-PL biosynthesis (Shima et al. 1983). In most bacteria, L-lysine is biosynthesized by the amino-acid biosynthetic pathway from L-aspartic acid (aspartate pathway, Fig. 4). , L-methionine, L-isoleucine, and L-threonine). 11), which reduces L-4-phospho aspartic acid into L-aspartate 4-semialdehyde. These two key enzymes are subject to complex regulation by the end-product amino acids. Because of the complexity of this pathway, different bacterial species have evolved diverse patterns of Ask regulation.

5 Substrate Specificity of Pls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4 Concluding Remarks and Future Perspectives . . . . . . . . . . . . . . . . . . . . . . . 38 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Abstract Streptomyces albulus NBRC14147 (previously named IFO14147) is known to produce the amino-acid homopolymer antibiotic, poly-e-L-lysine (e-polyL-lysine, e-PL), consisting of 25–35 L-lysine residues with a linkage between the a-carboxyl group and the e-amino group.

1997; Voeykova et al. 1998; Paranthaman and Dharmalingam 2003; Choi et al. 2004; Stinchi et al. 2003). In S. 0 Â 10À8). Nihira et al. have reported that the optimal concentration of MgCl2 for conjugation differs among the various strains (Choi et al. 2004). In fact, in S. 0 Â 10À7) (Hamano et al. 2005). 5 Y. Hamano Construction of a Genetically Engineered Strain of S. albulus CR1 for e-PL Overproduction Shima et al. have reported that the L-lysine molecule is directly utilized in e-PL biosynthesis (Shima et al.

Download PDF sample

Rated 4.45 of 5 – based on 20 votes