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

1Biochemistry Division, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jl. Ganesha 10, Bandung, 40132, Indonesia

2School of Pharmacy, Bandung Institute of Technology, Jl. Ganesha 10, Bandung, 40132, Indonesia

3Centre for Life Sciences, Bandung Institute of Technology, Jl. Ganesha 10, Bandung, 40132, Indonesia

© 2009 Slovak Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

Citation Information: Biologia. Volume 64, Issue 6, Pages 1047–1052, ISSN (Online) 1336-9563, ISSN (Print) 0006-3088, DOI: 10.2478/s11756-009-0190-8, October 2009

Publication History

Published Online:


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 α-amylase. The partially purified α-amylase using a maize starch affinity method exhibited an optimum pH and temperature of 6.0 and 60°C, respectively. The enzyme retained 72% of its activity in the presence of 1.5 M NaCl. Scanning electron micrographs showed that the α-amylase was capable of degrading starch granules of rice and maize. This α-amylase from Bacillus sp. ALSHL3 was classified as a saccharifying enzyme since its major final degradation product was glucose, maltose, and maltotriose.

Keywords: α-amylase; Bacillus filicolonicus; raw starch; maize; marine

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