Biochemical characterization of a raw starch degrading α-amylase from the Indonesian marine bacterium Bacillus sp ALSHL3

被引:14
|
作者
Vidilaseris, Keni [1 ]
Hidayat, Karina [1 ]
Retnoningrum, Debbie S. [2 ,3 ]
Nurachman, Zeily [1 ]
Noer, Achmad Saefuddin [1 ]
Natalia, Dessy [1 ,3 ]
机构
[1] Bandung Inst Technol, Div Biochem, Fac Math & Nat Sci, Bandung 40132, Indonesia
[2] Bandung Inst Technol, Sch Pharm, Bandung 40132, Indonesia
[3] Bandung Inst Technol, Ctr Life Sci, Bandung 40132, Indonesia
关键词
alpha-amylase; Bacillus filicolonicus; raw starch; maize; marine; BINDING DOMAIN; PURIFICATION; STRAIN; DEGRADATION; EVOLUTION; ENZYMES; FAMILY;
D O I
10.2478/s11756-009-0190-8
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
An Indonesian marine bacterial isolate, which belongs to genus of Bacillus sp. based on 16S rDNA analysis and was identified as Bacillus filicolonicus according to its morphology and physiology, produced a raw starch degrading alpha-amylase. The partially purified alpha-amylase using a maize starch affinity method exhibited an optimum pH and temperature of 6.0 and 60A degrees C, respectively. The enzyme retained 72% of its activity in the presence of 1.5 M NaCl. Scanning electron micrographs showed that the alpha-amylase was capable of degrading starch granules of rice and maize. This alpha-amylase from Bacillus sp. ALSHL3 was classified as a saccharifying enzyme since its major final degradation product was glucose, maltose, and maltotriose.
引用
收藏
页码:1047 / 1052
页数:6
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