Evaluation of a Malaysian soy sauce koji strain Aspergillus oryzae NSK for γ-aminobutyric acid (GABA) production using different native sugars

Hajar-Azhari, Siti and Wan-Mohtar, Wan Abd Al Qadr Imad and Ab Kadir, Safuan and Rahim, Muhamad Hafiz Abd and Saari, Nazamid (2018) Evaluation of a Malaysian soy sauce koji strain Aspergillus oryzae NSK for γ-aminobutyric acid (GABA) production using different native sugars. Food Science and Biotechnology, 27 (2). pp. 479-488. ISSN 1226-7708

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Official URL: https://doi.org/10.1007/s10068-017-0289-6

Abstract

In this study, a selected γ-aminobutyric acid (GABA)-rich Malaysian strain Aspergillus oryzae NSK was collected from soy sauce koji. The strain was used to explore the effect of using renewable native sugar syrup, sugarcane, nipa, and molasses as fermentable substrates for developing a novel functional GABA soy sauce. We evaluated the strain using the chosen native sugars for 7 days using shake flask fermentation at 30 °C. The results showed optimum GABA concentration was achieved using cane molasses as the fermentable substrate (354.08 mg/L), followed by sugarcane syrup (320.7 mg/L) and nipa syrup (232.07 mg/L). Cane molasses was subsequently utilized as a substrate to determine the most suitable concentration for A. oryzae NSK to enhance GABA production and was determined as 50% g/L of glucose standard cane molasses. Our findings indicate that cane molasses can be used as a GABA-rich ingredient to develop a new starter culture for A. oryzae NSK soy sauce production.

Item Type: Article
Uncontrolled Keywords: Aspergillus oryzae; Cane molasses; GABA; Koji fermentation; Soy sauce
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 20 Aug 2019 06:32
Last Modified: 20 Aug 2019 06:32
URI: http://eprints.um.edu.my/id/eprint/21981

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