NOTE] Is The Biotransformation of Chlorinated Dibenzo-p-dioxins by Sphingomonas wittichii RW1 Governed by Thermodynamic Factors?

In-Hyun Nam; Hyo-Bong Hong; Stefan Schmidt

doi:10.1007/s12275-014-3424-6

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NOTE] Is The Biotransformation of Chlorinated Dibenzo-p-dioxins by Sphingomonas wittichii RW1 Governed by Thermodynamic Factors?: In-Hyun Nam ¹, Hyo-Bong Hong ², Stefan Schmidt ³; Journal of Microbiology 2014;52(9):801-804.
DOI: https://doi.org/10.1007/s12275-014-3424-6
Published online: February 17, 2014

¹Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, 305-350, Republic of Korea, ²Future Technology Research Group, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, Republic of Korea, ³Discipline of Microbiology, School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg 3201, South Africa¹Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, 305-350, Republic of Korea, ²Future Technology Research Group, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700, Republic of Korea, ³Discipline of Microbiology, School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg 3201, South Africa

Corresponding author: In-Hyun Nam , Tel: +82-42-868-3164,

Received: 6 August 2013 • Revised: 21 November 2013 • Accepted: 27 November 2013

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Abstract

Density functional theory (DFT) calculations were used to explore the relationship between the biotransformation of dibenzo-p-dioxin and selected chlorinated derivatives by resting cells of Sphingomonas wittichii RW1 and measuring the thermodynamic properties of the biotransformation substrates. Sphingomonas wittichii RW1 can aerobically catabolize dibenzo-p-dioxin as well as 2,7-dichloro-, 1,2,3-trichloro-, 1,2,3,4-tetrachloro-, and 1,2,3,4,7,8-hexachlorodibenzo-pdioxin; however, neither the 2,3,7-trichloro- nor the 1,2,3,7,8-pentachlorodibenzo-p-dioxin was transformed to its corresponding metabolic intermediate. The experimental biotransformation rates established were apparently governed by the selected thermodynamic properties of the substrates tested.

Keywords: dibenzo-p-dioxin;biotransformation rates;Sphin-gomonas wittichii RW1;DFT calculation;correlation analysis

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