Article (Scientific journals)
A Novel Bacteriocin With A Ygngv Motif From Vegetable-Associated Enterococcus Mundtii: Full Characterization And Interaction With Target Organisms
Bennik, Mhj.; Vanloo, B.; Brasseur, Robert et al.
1998In Biochimica et Biophysica Acta. Biomembranes, 1373 (1), p. 47-58
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Abstract :
[en] A novel broad-spectrum antimicrobial peptide produced by vegetable-associated Enterococcus mundtii was purified and characterized, and designated mundticin. To our knowledge, this is the first report on bacteriocin production by this organism. The elucidation of the full primary amino acid sequence of mundticin (KYYGNGVSCNKKGCSVDWGKAIGIIGNNSAANLATGGAAGWSK) revealed that this antimicrobial peptide belongs to the class IIa bacteriocins of lactic acid bacteria which share a highly conserved N-terminal 'YGNGV' motif. Data obtained by computer modelling indicated an oblique orientation of the alpha-helical regions of mundticin and homologous class IIa bacteriocins at a hydrophobic-hydrophilic interface, which may play a role in the destabilization of phospholipid bilayers. The average mass of mundticin, as determined by electron spray mass spectrometry, was found to be 4287.21+/-0.59 Da. With respect to its biological activity, mundticin was shown to inhibit the growth of Listeria monocytogenes, Clostridium botulinum and a variety of lactic acid bacteria. Moreover, it was demonstrated to have a bactericidal effect on L. monocytogenes as a result of the dissipation of the membrane potential, and a loss of intracellular ATP in absence of ATP leakage. Its good solubility in water, and its stability over a wide pH and temperature range indicate the potential of this broad spectrum bacteriocin as a natural preservation agent for foods.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Bennik, Mhj.
Vanloo, B.
Brasseur, Robert ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Gorris, Lgm.
Smid, Ej.
Language :
English
Title :
A Novel Bacteriocin With A Ygngv Motif From Vegetable-Associated Enterococcus Mundtii: Full Characterization And Interaction With Target Organisms
Publication date :
1998
Journal title :
Biochimica et Biophysica Acta. Biomembranes
ISSN :
0005-2736
Publisher :
Elsevier, Netherlands
Volume :
1373
Issue :
1
Pages :
47-58
47-58
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 June 2010

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