Purification and cloning of sakacin 674, a bacteriocin from Lactobacillus sake Lb674

• Published in: FEMS microbiology letters 1994-01, Vol.115 (2/3), p.143-149
• Main Authors: Holck, A.L, Axelsson, L, Huhne, K, Krockel, L
• Format: Article
• Language: English
• Subjects: Amino Acid Sequence; amino acid sequences; Bacterial Proteins; Bacteriocin; bacteriocins; Bacteriocins - chemistry; Bacteriocins - genetics; Bacteriocins - isolation & purification; Bacteriology; Base Sequence; Biological and medical sciences; Biology of microorganisms of confirmed or potential industrial interest; Biotechnology; cloning; Cloning, Molecular; comparisons; Fundamental and applied biological sciences. Psychology; genbank/z25816; Gene cloning; Genes, Bacterial - genetics; Genetics; Lactobacillus; Lactobacillus - chemistry; Lactobacillus - genetics; Lactobacillus sake; Mass Spectrometry; Microbiology; Mission oriented research; Molecular Sequence Data; nucleotide sequences; Protein purification; purification; Sequence Analysis; Sequence Homology, Amino Acid; structural genes
• ISSN: 0378-1097; 1574-6968
• DOI: 10.1111/j.1574-6968.1994.tb06629.x

Sakacin 674, a bacteriocin produced by Lactobacillus sake Lb764 and which inhibits the growth of Listeria monocytogenes, was purified to homogeneity by ammonium sulphate precipitation and sequential ion exchange, hydrophobic interaction and reversed phase chromatography. The complete amino acid sequence of sakacin 674 was determined by Edman degradation. The bacteriocin consisted of 43 amino acid residues and had a calculated molecular mass of 4436.6 Da, which is in good agreement with the molecular mass of 4437.2 as determined by mass spectrometry. The structural gene encoding sakacin 674 (sakR) was located on the chromosome. This gene was cloned and sequenced. It encoded a primary translation product of 61 amino acid residues which was cleaved between amino acids 18 and 19 to yield the active sakacin 674. Sakacin 674 resembled other known bacteriocins and was very similar to sakacin P.