INCREASED THERMAL-STABILITY OF BACILLUS-LICHENIFORMIS ALPHA-AMYLASE IN THE PRESENCE OF VARIOUS ADDITIVES

被引:55
作者
ASTHER, M [1 ]
MEUNIER, JC [1 ]
机构
[1] INRA,CTR BIOTECHNOL AGROIND,CHIM BIOL LAB,F-78850 THIVERVAL GRIGNON,FRANCE
关键词
organic solvents; thermostability; thermostabilizing additives; α-Amylase;
D O I
10.1016/0141-0229(90)90030-T
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
The influence of various additives such as polyhydric alcohols, sugars, polyethylene glycol, and substrates on the thermostability of Bacillus licheniformis α-amylase has been studied. Results obtained showed a thermostabilizing effect of most of the additives tested (ethylene glycol, glycerol, sorbitol, glucose, maltose, maltotriose, and polyethylene glycol). The stabilizing efficiency appears to be strongly dependent on additive concentration. α-Amylase thermostability has also been assayed in organic solvents. In these media, particularly in octane, α-amylase acquired a remarkable stability since no deactivation occurred at 75°C for at least 90 min. © 1990.
引用
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页码:902 / 905
页数:4
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