Effect of nitrogen sources on the regulation of extracellular lipase production in Acinetobacter calcoaceticus strains

被引:21
作者
Cordenons, A
Gonzalez, R
Kok, R
Hellingwerf, KJ
Nudal, C
机构
[1] UNIV BUENOS AIRES,FAC FARM & BIOQUIM,CATEDRA BIOTECNOL,RA-1113 BUENOS AIRES,DF,ARGENTINA
[2] UNIV AMSTERDAM,EC SLATER INST,DEPT MICROBIOL,1018 WS AMSTERDAM,NETHERLANDS
关键词
D O I
10.1007/BF00130756
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
Extracellular lipase production and lipA expression were studied in A. calcoaceticus strains in relation to the nitrogen sources. Addition of casamino-acids or tryptone improved 2-3 times lipase yield as compared to ammonium, yeast extract or proteose-peptone. Further increase in lipase yield and enzyme stability were achieved when ammonium was also added. Differences in yields were not related to lipA transcription. Proteolytic activity was detected in culture broths simultaneous with lipase degradation. Post- transcriptional processes including enzyme protection, inactivation and secretion must be considered as important factors affecting lipase production.
引用
收藏
页码:633 / 638
页数:6
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