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Applied and Environmental Microbiology, September 2009, p. 5708-5713, Vol. 75, No. 17
0099-2240/09/$08.00+0     doi:10.1128/AEM.00752-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Characterization of Mundticin L, a Class IIa Anti-Listeria Bacteriocin from Enterococcus mundtii CUGF08{triangledown}

Guoping Feng, Giselle K. P. Guron, John J. Churey, and Randy W. Worobo*

Department of Food Science and Technology, Cornell University, Geneva, New York 14456

Received 2 April 2009/ Accepted 24 June 2009

Enterococcus mundtii CUGF08, a lactic acid bacterium isolated from alfalfa sprouts, was found to produce mundticin L, a new class IIa bacteriocin that has a high level of inhibitory activity against the genus Listeria. The plasmid-associated operons containing genes for the mundticin L precursor, the ATP binding cassette (ABC) transporter, and immunity were cloned and sequenced. The fifth residue of the conservative consensus sequence YGNGX in the mature bacteriocin is leucine instead of valine in the sequences of the homologous molecules mundticin KS (ATO6) and enterocin CRL35. The primary structures of the ABC transporter and the immunity protein are homologous but unique.

* Corresponding author. Mailing address: Department of Food Science and Technology, Cornell University, Geneva, NY 14456. Phone: (315) 787-2279. Fax: (315) 787-2284. E-mail: rww8{at}cornell.edu

{triangledown} Published ahead of print on 6 July 2009.

Applied and Environmental Microbiology, September 2009, p. 5708-5713, Vol. 75, No. 17
0099-2240/09/$08.00+0     doi:10.1128/AEM.00752-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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