Production of multiple bacteriocins, including the novel bacteriocin gassericin M, by Lactobacillus gasseri LM19, a strain isolated from human milk

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Garcia-Gutierrez, Enriqueta, O’Connor, Paula M., Colquhoun, Ian J., Vior, Natalia M., Rodríguez, Juan Miguel, Mayer, Melinda J., Cotter, Paul D. and Narbad, Arjan (2020) Production of multiple bacteriocins, including the novel bacteriocin gassericin M, by Lactobacillus gasseri LM19, a strain isolated from human milk. Applied Microbiology and Biotechnology, 104 (9). pp. 3869-3884. ISSN 0175-7598

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Abstract

Bacteriocins are antimicrobial peptides produced by bacteria, and their production is regarded as a desirable probiotic trait. We found that Lactobacillus gasseri LM19, a strain isolated from human milk, produces several bacteriocins, including a novel bacteriocin, gassericin M. These bacteriocins were purified from culture and synthesised to investigate their activity and potential synergy. L. gasseri LM19 was tested in a complex environment mimicking human colon conditions; it not only survived, but expressed the seven bacteriocin genes and produced short-chain fatty acids. Metagenomic analysis of these in vitro colon cultures showed that co-inoculation of L. gasseri LM19 with Clostridium perfringens gave 16S ribosomal RNA metagenomic profiles with more similarity to controls than to vessels inoculated with C. perfringens alone. These results indicate that L. gasseri LM19 could be an interesting candidate for maintaining homeostasis in the gut environment.

Item Type:	Article
Uncontrolled Keywords:	antimicrobial,bacteriocin,colon model,gassericin,lactobacillus gasseri,scfa,applied microbiology and biotechnology,biotechnology ,/dk/atira/pure/subjectarea/asjc/2400/2402
Faculty \ School:	Faculty of Science > School of Biological Sciences
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	03 Mar 2025 15:30
Last Modified:	05 Apr 2025 00:20
URI:	https://ueaeprints.uea.ac.uk/id/eprint/98639
DOI:	10.1007/s00253-020-10493-3

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