By Roberto Kolter, Felipe Moreno (auth.), Richard James, Claude Lazdunski, Franc Pattus (eds.)

Provided listed below are fresh findings on bacteriocins: plasmid-encoded pollutants produced through micro organism, which fluctuate from conventional antibiotics in killing in basic terms micro organism which are heavily relating to the manufacturing pressure. integrated are introductory chapters on bacteriocins, microcins (low molecular weight bacteriocins), and lantibiotics (peptide antibiotics containing lanthionine), extra, contributions on pore forming bacteriocins, the mechanisms of immunity to bacteriocins, uptake and secretion, in addition to evolution of bacteriocins. it truly is of specific curiosity that the lantibiotic nisin is licensed to be used as nutrition preservative and one other lantibiotic, epidermin, has strength as a healing drug opposed to pimples.

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Additional resources for Bacteriocins, Microcins and Lantibiotics

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Foremost among the characterized bacteriocins is the lantibiotic nisin produced by Lactococcus lac tis subsp. lactis. This small 34 amino acid peptide contains two sulfur-containing amino acids,lanthionine and beta-methyllanthionine. Within the Lactoba- cillaceae, lantibiotics had not been described prior to this conference. However, Mortvedt et at. (l99la) reported at this symposium that the L. sake bacteriocin, lactocin S, contains lanthionine residues. In addition, Gudmundsdottir & Stoffels (1991) also implied the presence of lanthionine residues in a bacteriocin of 4632 daltons (33-35 amino acids) produced by a Carnobacterium species isolated from fish.

1991); K1aenbaDlDer (1987); f=Muriana, Klaenba\llller (1991a); q=Muriana, Klaenhanurer (1991b); h=Toba et al. (199lb); i-=Rammelsberq, Radler (1990); j=Ahrt, stiles (1990); k=Schillinqer, Holzapfal (1990); l=Toba et al. (1991c); _de Klark, Smit (1967); n - Toba at a1. (1991a); o-Upreti, Hinsdill (1975); p-Joarqar, Klaenbammer (1986); q=Daeschel at al. (1990); r=West, Warner (1988); s~imenaz-Diaz et al. (1990); t~schillinqer, Lucka (1989); u-Okereke, Montville (1991); v=Schillinqer at a1. (1991); w=Mortvedt, Nas (1990); x cMortvsdt et al.

The actual translation products produced from one or both ORFs have not yet been evaluated. Recent subcloning and expression studies have shown that disruption of ORFX/ Y eliminates the Lar phenotype (Ahn & Klaenhammer, unpublished data). Therefore, although their specific roles remain to be identified, one or both of these gene products are essential for expression of the Lar phenotype. Expanded sequencing efforts downstream from ORFX/Y have recently identified a fourth open reading frame (ORFZ) that could encode a protein of 124 amino acids (Ahn & Klaenhammer, unpublished).

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