Extreme furfural tolerance of a soil bacterium Enterobacter cloacae GGT036
•We isolated a furfural-tolerant bacterium Enterobacter cloacae GGT036.•E. cloacae GGT036 showed furfural-tolerant growth under aerobic culture.•IC50 of E. cloacae GGT036 based on cell density was 47.7 mM after 24 h.•We presented the complete genome sequence of E. cloacae GGT036.
Detoxification process of cellular inhibitors including furfural is essential for production of bio-based chemicals from lignocellulosic biomass. Here we isolated an extreme furfural-tolerant bacterium Enterobacter cloacae GGT036 from soil sample collected in Mt. Gwanak, Republic of Korea. Among isolated bacteria, only E. cloacae GGT036 showed cell growth with 35 mM furfural under aerobic culture. Compared to the maximal half inhibitory concentration (IC50) of well-known industrial strains Escherichia coli (24.9 mM furfural) and Corynebacterium glutamicum (10 mM furfural) based on the cell density, IC50 of E. cloacae GGT036 (47.7 mM) was significantly higher after 24 h, compared to E. coli and C. glutamicum. Since bacterial cell growth was exponentially inhibited depending on linearly increased furfural concentrations in the medium, we concluded that E. cloacae GGT036 is an extreme furfural-tolerant bacterium. Recently, the complete genome sequence of E. cloacae GGT036 was announced and this could provide an insight for engineering of E. cloacae GGT036 itself or other industrially relevant bacteria.
Journal: Journal of Biotechnology - Volume 193, 10 January 2015, Pages 11–13