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Triggering of the antibacterial activity of Bacillus subtilis B38 strain against methicillin-resistant Staphylococcus aureus.

Abstract：

:When cultured in minimal growth medium, the B38 strain of Bacillus subtilis did not exhibit any antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA) clinical isolate. Coculturing B38 strain with viable MRSA cells weakly increased antibacterial activity production (20 AU/ml). Addition of dead MRSA cells in a B38 culture, increased by 8-fold the B. subtilis strain antibacterial activity reaching 160 AU/ml against MRSA strain. This antibacterial activity recovered from cell-free supernatants was stimulated by an autoinducing compound which is sensitive to the action of proteinase K suggesting a proteinaceous nature. This compound was heat-stable till 80 °C and showed a molecular mass around 20 kDa as determined by SDS-PAGE. These results suggest that the production of antibacterial compounds by B38 strain is dependent on the amount of the autoinducing compound.

journal_name

Appl Biochem Biotechnol

journal_title

Applied biochemistry and biotechnology

authors

Tabbene O,Karkouch I,Slimene IB,Elfeddy N,Cosette P,Mangoni ML,Jouenne T,Limam F

doi

10.1007/s12010-010-9112-z

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

34-44

issue

1

eissn

0273-2289

issn

1559-0291

journal_volume

164

pub_type

杂志文章

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