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Int J Syst Evol Microbiol 53 (2003), 1479-1483; DOI  10.1099/ijs.0.02285-0
© 2003 International Union of Microbiological Societies

Delftia tsuruhatensis sp. nov., a terephthalate-assimilating bacterium isolated from activated sludge

Toru Shigematsu1, Kazuyo Yumihara1,2, Yutaka Ueda1, Masaki Numaguchi3, Shigeru Morimura1 and Kenji Kida1,3

1 Department of Materials and Life Science, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto-City, Kumamoto 860-8555, Japan
2 Department of Bioengineering, Yatsushiro National College of Technology, 2627 Hirayama-shinmachi, Yatsushiro, Kumamoto 866-8501, Japan
3 Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto-City, Kumamoto 860-8555, Japan

Correspondence
Toru Shigematsu
shige{at}kumamoto-u.ac.jp

A terephthalate-assimilating bacterium was isolated from activated sludge collected from a domestic wastewater treatment plant in Japan by enrichment with terephthalate as sole carbon source. The isolate, designated strain T7T, was a Gram-negative, short rod-shaped micro-organism. A phylogenetic study based on 16S rRNA gene sequences indicated that strain T7T should be placed in the genus Delftia. A DNA–DNA hybridization value of 69 % was determined between strain T7T and Delftia acidovorans ATCC 15668T. Major cellular fatty acids of strain T7T were C16 : 0, C16 : 1 and C18 : 1. Substantial amounts of cyclopropanoic acid (C17 : 0), 3-OH C10 : 0, C12 : 0, C15 : 0 and C14 : 0 were also detected. The total DNA G+C content of strain T7T was 66·2 mol%. Strain T7T could utilize the following compounds as carbon sources: acetamide, {beta}-alanine, citrate, D-fructose, glycerol, isobutyrate, isophthalate, D(-)-mannitol, maleate, malonate, phenylacetate, propionate, protocatechuate, terephthalate, D-tryptophan and L-tryptophan. Comparisons of phenotypic and genotypic characteristics with other known species belonging to the genus Delftia suggest that strain T7T represents a novel species, for which the name Delftia tsuruhatensis sp. nov. is proposed; strain T7T is the type strain (=IFO 16741T=ATCC BAA-554T).

Abbreviations: MLSS, mixed liquor suspended solids; PET, polyethylene terephthalate; TERDOS, terephthalate 1,2-dioxygenase system; TOC, total organic carbon

Published online ahead of print on 20 June 2003 as DOI 10.1099/ijs.0.02285-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain T7T is AB075017.




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