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Applied and Environmental Microbiology, July 2000, p. 2882-2887, Vol. 66, No. 7
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Isolation and Characterization of 2,3-Dichloro-1-Propanol-Degrading Rhizobia

Agus J. Effendi,dagger Steven D. Greenaway, and Brian N. Dancer*

Cardiff School of Biosciences, Cardiff University, Cardiff CF10 3TL, Wales, United Kingdom

Received 16 November 1999/Accepted 10 April 2000

2,3-Dichloro-1-propanol is more chemically stable than its isomer, 1,3-dichloro-2-propanol, and is therefore more difficult to degrade. The isolation of bacteria capable of complete mineralization of 2,3-dichloro-1-propanol was successful only from enrichments at high pH. The bacteria thus isolated were found to be members of the alpha  division of the Proteobacteria in the Rhizobium subdivision, most likely Agrobacterium sp. They could utilize both dihaloalcohol substrates and 2-chloropropionic acid. The growth of these strains in the presence of 2,3-dichloro-1-propanol was strongly affected by the pH and buffer strength of the medium. Under certain conditions, a ladder of four active dehalogenase bands could be visualized from this strain in activity gels. The enzyme involved in the complete mineralization of 2,3-dichloro-1-propanol was shown to have a native molecular weight of 114,000 and consisted of four subunits of similar molecular weights.


* Corresponding author. Mailing address: Cardiff School of Biosciences, Cardiff University, P.O. Box 915, Cardiff CF10 3TL, Wales, United Kingdom. Phone: 44(0) 2920 874921. Fax: 44(0) 2920 874305. E-mail: Dancer{at}cf.ac.uk.

dagger Present address: Inter University Center in Biotechnology, Institute Technology Bandung, Bandung 40132, Indonesia.


Applied and Environmental Microbiology, July 2000, p. 2882-2887, Vol. 66, No. 7
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.



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