, 64:1047 | Cite as

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

  • Keni Vidilaseris
  • Karina Hidayat
  • Debbie S. Retnoningrum
  • Zeily Nurachman
  • Achmad Saefuddin Noer
  • Dessy NataliaEmail author
Section Cellular and Molecular Biology


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.

Key words

α-amylase Bacillus filicolonicus raw starch maize marine 



dinitrosalicylic acid


marine broth


starch-binding domain


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Copyright information

© © Versita Warsaw and Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Keni Vidilaseris
    • 1
  • Karina Hidayat
    • 1
  • Debbie S. Retnoningrum
    • 2
    • 3
  • Zeily Nurachman
    • 1
  • Achmad Saefuddin Noer
    • 1
  • Dessy Natalia
    • 1
    • 3
    Email author
  1. 1.Biochemistry Division, Faculty of Mathematics and Natural SciencesBandung Institute of TechnologyBandungIndonesia
  2. 2.School of PharmacyBandung Institute of TechnologyBandungIndonesia
  3. 3.Centre for Life SciencesBandung Institute of TechnologyBandungIndonesia

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