El-Hayah : Jurnal Biologi
Vol 5, No 3 (2015): EL-HAYAH (VOL 5, NO 3,September 2015)

ISOLASI DAN IDENTIFIKASI BAKTERI PENGHASIL PROTEASE YANG DISKRINING DARI TERASI

ARFARITA, NOVI (Unknown)



Article Info

Publish Date
12 Sep 2015

Abstract

Terasi is a traditional fermented shrimp paste of Indonesia popularly used as an important ingredient in many Indonesian cuisines, and further screened for their protease-producing bacteria. A total of 117 bacterial isolates were retrieved  from 4 terasi samples. When inoculatedusing skim milk agar, 71 isolates (~61%) produced distinct clear zones implying their proteolytic activity. A bacterial isolate  namely Bacillus S2-3 wasselected for further study due to its widest clear zones when thebacterial cells and culture supernatant were used. This strain could grow up to 60oC with a broad pH range of 5 – 9. The optimal growth condition was at pH 6 and 37oC. The enzyme activity was also characterized using azocasein method. The optimal pH of bacterialenzymes was between 6 and 7 whereas the optimal temperature of BacillusS2-3 proteases was 22 – 24oC. For thermostability, the S2-3 enzymes remained active up to 2h at 40 and 50oC. The results ofbiochemical tests, BacillusS2-3 was identified as Bacillussubtilis, later explored it is potential for the purposes for  food industry

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Journal Info

Abbrev

bio

Publisher

Subject

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Medicine & Pharmacology

Description

El-Hayah : Jurnal Biologi, publishes peer-reviewed research and review articles of special importance and broad interest in any area of biology (such as botany, zoology, ecology, microbiology, physiology, nanobiology, marine biology, hydrobiology, neurobiology, genetics, developmental biology, ...