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Biotransformation of various carbon sources to kojic acid by cell-bound enzyme system of A. flavus Link 44-1

Mohamad, Rosfarizan and Ariff, Arbakariya (2007) Biotransformation of various carbon sources to kojic acid by cell-bound enzyme system of A. flavus Link 44-1. Biochemical Engineering Journal, 35 (2). pp. 203-209. ISSN 1369-703X

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Official URL: http://dx.doi.org/10.1016/j.bej.2007.01.015

Abstract

The ability of cell-bound enzyme of Aspergillus flavus Link 44-1 for production of kojic acid was studied in resuspended cell system. Cell material was produced in batch fermentation using 2 L stirred tank fermenter. The cell mycelia were then resuspended into 250 mL shake flask containing various carbon sources solution. Among the carbon sources tested, glucose gave the highest kojic acid yield based on carbon consumed (0.365 g/g) followed by sucrose (0.279 g/g), starch hydrolysate (0.212 g/g) and fructose (0.195 g/g). The rate of biotransformation was increased with increasing mycelial cell. Kojic acid production was also varied with different glucose and sucrose concentrations. The highest production was obtained at 100 g/L glucose and 100 g/L sucrose with a final kojic acid concentration of 45.3 and 33.4 g/L, respectively. The rate of biotransformation of glucose and sucrose to kojic acid followed the Michaelis–Menten equation, suggesting that the biotransformation rate vary with substrate concentration similar to the behaviour of many enzymes reaction.

Item Type:Article
Keyword:Kojic acid, Biotransformation, Cell-bound enzyme, Resuspended cell system, Aspergillus flavus
Faculty or Institute:Faculty of Biotechnology and Biomolecular Sciences
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.bej.2007.01.015
ID Code:7264
Deposited By: Erni Suraya Abdul Aziz
Deposited On:14 Jun 2010 15:31
Last Modified:18 May 2011 19:02

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