Antimicrobial activity of a newly identified bacteriocin of Bacillus cereus

• DOI: 10.1128/aem.59.12.4313-4316.1993
• Publication Date: 2020-01-01T04:48:18Z
• Authors: G Naclerio; E Ricca; M Sacco; M De Felice
• Keywords: Cereus; Bacillaceae; Molecular mass; Sodium dodecyl sulfate; Bacillus (shape); Strain (injury)

A bacteriocin-producing Bacillus cereus strain was isolated. The bacteriocin, here called cerein, shown to be active specifically against other B. strains and inactive all bacterial species tested. Cerein detected in the culture supernatants of stationary-phase cells, its appearance inhibited by induction sporulation. activity cerein insensitive organic solvents nonproteolytic enzymes, partially stable heat, over a wide range pH values. Direct detection antimicrobial on sodium dodecyl sulfate-polyacrylamide gel suggested an apparent molecular mass about 9 kDa.