Partial purification and some properties of -amylase from Bacillus subtilis KIBGE-HAS.
Indian J Biochem Biophys
;
2009 Oct; 46(5): 401-404
Article
in English
| IMSEAR
| ID: sea-135224
ABSTRACT
An extracellular -amylase from Bacillus subtilis KIBGE-HAS was partially purified by ultrafiltration and ammonium sulphate precipitation with 19.2-fold purification and specific activity of 4195 U/mg. The enzyme showed relatively high thermostability and retained 62% of its activity when kept at 70°C for 15 min. -Amylase was highly stable at -18°C and loss of activity was very low during stability study. Metal ions like Mn2+, Ca2+, Co2+, K+, Mg2+, and Fe3+ activated the enzyme, while Hg2+ Ba2+, Cu2+, Na+ and Al3+ strongly inhibited the activity. The α-amylase was highly stable in various surfactants and detergents. In the presence of surfactants such as SDS and Triton X-100 the enzyme activity was found 2.9 and 1.8-fold higher respectively than control. The non-ionic detergents (Tween 20 and Tween 80) exhibited slightly inhibitory effect on the enzyme activity.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Surface-Active Agents
/
Temperature
/
Bacillus subtilis
/
Alpha-Amylases
/
Metals
Language:
English
Journal:
Indian J Biochem Biophys
Year:
2009
Type:
Article
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