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Applied and Environmental Microbiology, September 1999, p. 4268-4270, Vol. 65, No. 9
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Poly(Aspartic Acid) Degradation by a Sphingomonas sp. Isolated from Freshwater

Kenji Tabata, Ken-Ichi Kasuya, Hideki Abe, Kozue Masuda, and Yoshiharu Doi*

Polymer Chemistry Laboratory, RIKEN Institute, Hirosawa, Wako-shi, Saitama 351-0198, Japan

Received 14 April 1999/Accepted 15 June 1999

A poly(aspartic acid) degrading bacterium (strain KT-1 [JCM10459]) was isolated from river water and identified as a member of the genus Sphingomonas. The isolate degraded only poly(aspartic acid)s of low molecular masses (<5 kDa), while the cell extract hydrolyzed high-molecular-mass poly(aspartic acid)s of 5 to 150 kDa to yield aspartic acid monomer.

* Corresponding author. Mailing address: Polymer Chemistry Laboratory, RIKEN Institute, Hirosawa, Wako-shi, Saitama 351-0198, Japan. Phone: 81-48 (467) 9402. Fax: 81-48 (462) 4667. E-mail: ydoi{at}postman.riken.go.jp.

Applied and Environmental Microbiology, September 1999, p. 4268-4270, Vol. 65, No. 9
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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