Antilisterial activity of thermophilin 347, a bacteriocin produced by Streptococcus thermophilus.

摘要: Streptococcus thermophilus 347 isolated from yogurt produces a bacteriocin referred as thermophilin 347. The was evidenced in the neutralized, filtered and catalase treated culture supernatant fluid of producer strain. After partial purification, exhibited bactericidal effect against Listeria monocytogenes several closely related lactic acid bacteria. activity lost after protease treatment but maintained heating at 100 degrees C for 1 h; autoclaving 121 15 min reduced by 50%. SDS-PAGE partially purified used to detect corresponding an apparent molecular mass between 2.5 6.2 KDa.