Isolation from a shea cake digester of a tannin-degrading Streptococcus gallolyticus strain that decarboxylates protocatechuic and hydroxycinnamic acids, and emendation of the species.

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Title Isolation from a shea cake digester of a tannin-degrading Streptococcus gallolyticus strain that decarboxylates protocatechuic and hydroxycinnamic acids, and emendation of the species.
Author Chamkha, Mohamed; Patel, Bharat Kumar; Traore, Alfred; Garcia, Jean-Louis; Labat, Marc
Journal Name International Journal of Systematic and Evolutionary Microbiology
Year Published 2002
Place of publication Reading, UK
Publisher Society of General Microbiology
Abstract A facultatively anaerobic, mesophilic, non-motile, non-sporulating bacterium, designated strain B7, was isolated from an anaerobic digester fed with shea cake rich in tannins and aromatic compounds, after enrichment on tannic acid. The coccoid cells (less than 2 microm in diameter) occurred in pairs or short chains and stained Gram-positive. Strain B7 fermented a wide range of carbohydrates (cellobiose, fructose, galactose, glucose, lactose, maltose, mannitol, melibiose, raffinose and trehalose), grew optimally at pH 7.0 and had a G+C content of 40.4 +/- 0.3 mol%. Strain B7 was closely related to Streptococcus gallolyticus ACM 3611(T), a member of the Streptococcus bovis rRNA cluster, with a sequence similarity of 98% and a DNA hybridization value of 86 mol%. Isolate B7 hydrolysed tannic acid and decarboxylated gallic acid to pyrogallol, traits also observed in S. gallolyticus ACM 3611(T). In addition, both strains decarboxylated protocatechuic acid to catechol, p-coumaric acid to 4-vinylphenol, caffeic acid to 4-vinylcatechol and ferulic acid to 4-vinylguaiacol. An unsubstituted para-hydroxyl group on the benzene ring was required for decarboxylation. Glucose addition markedly increased the conversion rate. As these traits were not described previously, emendation of the description of the species Streptococcus gallolyticus is proposed.
Peer Reviewed Yes
Published Yes
Publisher URI http://ijs.sgmjournals.org/
Alternative URI http://dx.doi.org/10.1099/ijs.0.01909-0
Volume 52
Page from 939
Page to 944
ISSN 1466-5026
Date Accessioned 2003-06-04
Date Available 2009-09-16T07:41:16Z
Language en_AU
Research Centre Queensland Micro and Nanotechnology Centre
Faculty Faculty of Science
Subject PRE2009-Science & Technology
URI http://hdl.handle.net/10072/6950
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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