BIODEGRADATION OF 2-NITROTOLUENE BY PSEUDOMONAS SP STRAIN JS']JS42

被引:84
作者
HAIGLER, BE [1 ]
WALLACE, WH [1 ]
SPAIN, JC [1 ]
机构
[1] ARMSTRONG LAB,EQCOL,TYNDALL AFB,FL 32403
关键词
D O I
10.1128/AEM.60.9.3466-3469.1994
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
A strain of Pseudomonas sp. was isolated from nitrobenzene-contaminated soil and groundwater on 2-nitrotoluene as the sole source of carbon, energy, and nitrogen. Bacterial cells growing on 2-nitrotoluene released nitrite into the growth medium. The isolate also grew on 3-methylcatechol, 4-methylcatechol, and catechol. 2-Nitrotoluene, 3-methylcatechol, and catechol stimulated oxygen consumption by intact cells regardless of the growth substrate. Crude extracts from the isolate contained catechol 2,3-dioxygenase and 2-hydroxy-6-oxohepta-2,4-dienoate hydrolase activity. The results suggest that 2-nitrotoluene is subject to initial attack by a dioxygenase enzyme that forms 3-methylcatechol with concomitant release of nitrite. The 3-methylcatechol is subsequently degraded via the meta ring fission pathway.
引用
收藏
页码:3466 / 3469
页数:4
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