• 한국미생물·생명공학회지
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• 제35권3호
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• pp.245-249
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• 2007

토양 시료를 대상으로 3.4-dichloroaniline (DCA)를 함유한 최소배지에서의 집식배양과 배양 후 HPLC에 의한 잔류분석을 통해 3,4-DCA의 분해 능력이 우수한 균주 Pseudomonas sp. KB35B를 분리하였다. 분리균 KB35B는 1/10 LB배지에 함유된 50 ppm의 3,4-DCA를 12시간만에 완전히 제거하였다. 이외에도 분리균 KB35B는 3-chloroaniline (CA), 4-CA 및 2,4-DCA의 분해 활성을 나타내었으나 2,5-DCA와 3,5-DCA에 대한 분해활성을 가지고 있지는 않았다. 또한, 분리균 KB35B에서 3,4-DCA의 유도에 의한 catechol 2,3-dioxygenase 활성의 증가가 관찰되었다. 이상의 결과로부터 catechol 2,3-dioxygenase이 3,4-DCA 분해에 관여하는 중요한 효소군중의 하나로 생각된다.

• 한국수산과학회지
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• 제40권5호
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• pp.282-287
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• 2007

Chloroanilines are aromatic amines used as intermediate products in the synthesis of herbicides, azo-dyes, and pharmaceuticals. 3,4-dichloroaniline (DCA) is the degradation product of some herbicides (diuron, propanil, and linuron) and of trichlorocarbanilide, a chemical used as an active agent in the cosmetic industry. The compound, however, is considered a potential pollutant due to its toxicity and recalcitrant property to humans and other species. With the increasing necessity for bioremediation, we sought to isolate bacteria that degraded 3,4-DCA. A bacterium capable of growth on 3,4-DCA as the sole carbon source was isolated from seaside sediment using a dilution method with a culture enriched in 3,4-DCA. The isolated strain, YM-7 was identified to be Pseudomonas sp. The isolated strain was also able to degrade other chloroaniline compounds. The isolated strain showed a high level of catechol 2,3-dioxygenase activity on exposure to 3,4-DCA, suggesting that this enzyme is an important factor in 3,4-DCA degradation. The activity toward 4-methylcatechol was 53.1% that of catechol, while the activity toward 3-methylcatechol, 4-chlorocatechol and 4,5-chlorocatechol was 18.1, 33.1, and 6.9%, respectively.