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Bacteriocin genes are biosynthetic genes which encodes proteins involved in bacteriocin regulation, self-immunity, transport and modification. This research was aimed at identifying the gene for the synthesis of bacteriocin. Four strains of lactic acid bacteria previously isolated from fermented foods (Nono (N2), Ogi (O3), Dawadawa (D1 and D3) and Wara (W3) were identified using molecular technique and used to produce bacteriocin. The bacteriocin activity was assayed against some test bacteria (Staphylococcus aureus, Escherichia coli, Klebsiella sp and methicillin resistant Staphylococcus aureus) using agar well diffusion method and the bacteriocin genes were identified using BAGEL3. The LAB identified were Lactobacillus fermentum O3, Leuconostoc mesenteroides N2, Weissella cibaria D1 and 2 strains of Lactobacillus plantarum D3 and W3. The entire identified LAB was able to produce bacteriocin. The antimicrobial activity showed varied inhibitory effects of the bacteriocins on the test bacteria. Bacteriocin from isolate O3 showed the highest inhibition zone 16mm on S. aureus. The identified gene for these bacteriocins were plnJK gene for Lactobacillus plantarum str WCFS1 and strain LZ95 (W3 and D3), entA gene for Lactobacillus fermentum str 3872 (O3) and ppnC7 gene for Leuconostoc mesenteroides str SRA3 (N2) with the interaction of other peptides were responsible for bacteriocin production.
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