Cyanide degradation by an Escherichia coli strain

被引:38
作者
Figueira, MM
Ciminelli, VST
deAndrade, MC
Linardi, VR
机构
[1] UNIV FED MINAS GERAIS,DEPT MICROBIOL,BR-31270901 BELO HORIZONT,MG,BRAZIL
[2] UNIV FED MINAS GERAIS,ESCOLA ENGN,DEPT ENGN MET,BR-3016030 BELO HORIZONT,MG,BRAZIL
关键词
cyanide; cyanide metabolism; cyanide oxygenase; Escherichia coli;
D O I
10.1139/m96-070
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Chemical formation of a glucose-cyanide complex was necessary for metabolic degradation of cyanide at concentrations up to 50.0 mg/L by a strain of Escherichia coli isolated from gold extraction circuit liquids. Ammonia accumulating during the culture log phase as the sole nitrogen by-product was further utilized for bacterial growth. Washed (intact) cells, harvested at different periods of bacterial growth on cyanide, consumed oxygen in presence of cyanide. These findings suggest that metabolism of cyanide involved a dioxygenase enzyme that converted cyanide directly to ammonia. without the formation of cyanate.
引用
收藏
页码:519 / 523
页数:5
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