Abstract

A gene (aman6) encoding endo-1,6-alpha-D-mannanase, a yeast mannan backbone degrading enzyme from Bacillus circulans was cloned. The putative aman6 was 1,767 base pairs long and encoded a mature 1,6-alpha-D-mannanase protein of 589 amino acids and a signal peptide of 36 amino acids. The purified mature 1,6-alpha-D-mannanase from the Escherichia coli transformant showed 61-kDa protein, and N-terminal amino acid sequence and other general properties of the recombinant enzyme were identical to those of 1,6-alpha-D-mannanase from Bacillus circulans TN-31.

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