ISSN:
1432-0614
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract A Bacillus brevis gene coding for an endo-(1,3–1,4)-β-glucanase was cloned in Escherichia coli and sequenced. The open reading frame contains a sequence of 759 nucleotides encoding a polypeptide of 252 amino acid residues. The amino acid sequence of the β-glucanase gene showed only a 50% similarity to previously published data for Bacillus endo-(1,3–1,4)-β-glucanases. The optimum temperature and pH for enzyme activity were 65–70°C and 8–10, respectively. When held at 75°C for 1 h, 75% residual activity was measured. The molecular mass was estimated to be about 29 kDa on sodium dodecyl sulphate (SDS)-polyacrylamide gel electrophoresis and the enzyme was found to be resistant to SDS.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00242946
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