Identification and study on bacteriocin-producing Lactobacillus screened from sauerkraut

A lactic acid bacteria A5 strain was isolated from the sauerkraut.The results showed that the supernatant of A5 strain was sensitive with pepsin and papain,the inhibitory material of A5 strain was a kind of protein,which could be classed as bacteriocin.The bacteriocin had the strong heat endurance,and it still had the strong bacteriostatic activity at 121 ℃,20 min.The bacteriocin had the strong bacteriostatic activity in pH 3.0-5.0.The bacteriocin showed inhibition to some gram-positive and gram-negative bacteria.Therefore,it was a kind of bacteriocin with broad-spectrum antimicrobial activity.