%0 Journal Article
%T A Marine Sulfate-Reducing Bacterium Producing Multiple Antibiotics: Biological and Chemical Investigation
%A Yi Zhang
%A Jun Mu
%A Xiaojie Gu
%A Chenyan Zhao
%A Xiaoliang Wang
%A Zeping Xie
%J Marine Drugs
%D 2009
%I MDPI AG
%R 10.3390/md7030341
%X A marine sulfate-reducing bacterium SRB-22 was isolated by means of the agar shake dilution method and identified as Desulfovibrio desulfuricans by morphological, physiological and biochemical characteristics and 16S rDNA analysis. In the bioassay, its extract showed broad-spectrum antimicrobial activity using the paper disc agar diffusion method. This isolate showed a different antimicrobial profile than either ampicillin or nystatin and was found to produce at least eight antimicrobial components by bioautography. Suitable fermentation conditions for production of the active constituents were determined to be 28 day cultivation at 25 ˇăC to 30 ˇăC with a 10% inoculation ratio. Under these conditions, the SRB-22 was fermented, extracted and chemically investigated. So far an antimicrobial compound, mono-n-butyl phthalate, and an inactive compound, thymine, have been isolated and characterized.
%K marine sulfate-reducing bacterium
%K isolation
%K identification
%K broad-spectrum antimicrobial activity
%K mono-n-butyl phthalate
%U http://www.mdpi.com/1660-3397/7/3/341