Klebsiella pneumoniae KE-1 degrades endosulfan without formation of the toxic metabolite, endosulfan sulfate

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Title
Klebsiella pneumoniae KE-1 degrades endosulfan without formation of the toxic metabolite, endosulfan sulfate
Author(s)
Gi Seok Kwon; J E Kim; T K Kim; H Y Sohn; S C Koh; Kee Sun Shin; D G Kim
Bibliographic Citation
FEMS Microbiology Letters, vol. 215, no. 2, pp. 255-259
Publication Year
2002
Abstract
For bioremediation of toxic endosulfan, endosulfan degradation bacteria, which do not form toxic endosulfan sulfate, were isolated from various soil samples using endosulfan as sole carbon and energy source. Among the 40 isolated bacteria, strain KE-1, which was identified as Klebsiella pneumoniae by physiological and 16S rDNA sequence analysis, showed superior endosulfan degradation activity. Analysis of culture pH, growth, free sulfate and endosulfan and its metabolites demonstrated that KE-1 biologically degrades 8.72 μg endosulfan ml-1 day-1 when incubated with 93.9 μg ml-1 endosulfan for 10 days without formation of toxic endosulfan sulfate. Our results suggest that K. pneumoniae KE-1 degraded endosulfan by a non-oxidative pathway and that strain KE-1 has potential as a biocatalyst for endosulfan bioremediation.
Keyword
16S rDNA sequencingBioremediation of endosulfanKlebsiella pneumoniae KE-1Non-oxidative pathway
ISSN
0378-1097
Publisher
Oxford Univ Press
DOI
http://dx.doi.org/10.1016/S0378-1097(02)00954-0
Type
Article
Appears in Collections:
Division of Biomaterials Research > Industrial Bio-materials Research Center > 1. Journal Articles
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