Cloning and expression of NAD+-dependent L-arabinitol 4-dehydrogenase gene (ladA) of Aspergillus oryzae
2005
A gene of Aspergillus oryzae , ladA , which encodes L -arabinitol 4-dehydrogenase (EC 1.1.1.12), and its cDNA were cloned in Escherichia coli . The gene consisted of a 1209-bp coding region, interrupted by a 59-bp intron, which encoded a 382-amino-acid polypeptide (40,812 Da). The protein showed 67% identity to a well-studied L -arabinitol 4-dehydrogenase (Lad1) of Hypocrea jecorina . The cell-free extract of E. coli , which expressed ladA cDNA, showed L -arabinitol dehydrogenase activity with NAD + . It was also reactive for ribitol and xylitol.
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