.beta.-galactosidase from Thermus sp

Details .beta.-galactosidase from Thermus sp .beta.-galactosidase from Thermus sp

1991-08-09

1994-02-01

Robinson, Douglas W.

Chemistry: molecular biology and microbiology

Enzyme , proenzyme; compositions thereof; process for...

Hydrolase

435220, 4352521, 435822, C12N 938, C12N 952, C12N 120, C12N 100

Patent

active

052831892

ABSTRACT:
A .beta.-galactosidase having a high thermostability is produced by Thermus sp. FERM BP-1678, FERM BP-1679, and FERM BP-1680. The .beta.-galactosidase has an optimum temperature of 75 to 85 degrees celsius, and an optimum pH of 4.5 to 6.5 and an enzymatic activity which is not lowered substantially by 50 mM each of galactose and glucose. The .beta.-galactosidase is used to hydrolyze lactose in foods, such as milk, at a high temperature at which the putrefaction by saprophytes is difficult.

REFERENCES:
patent: 4895801 (1990-01-01), Kan et al.
Ulrich, J. T., Induction and Characterization of B-Galactosidase in an Extreme Thermophile, 1972, 691-698.

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