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© Research
Publication : Biochimica et biophysica acta

Glucanases in Schizosaccharomyces. Isolation and properties of an exo-beta-glucanase from the cell extracts and culture fluid of Schizosaccharomyces japonicus var. versatilis.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Biochimica et biophysica acta - 18 Dec 1975

Fleet GH, Phaff HJ,

Link to Pubmed [PMID] – 1093

Biochim. Biophys. Acta 1975 Dec; 410(2): 318-32

(11 Cell extracts and extracellular culture fluids of species of the yeast genus Schizosaccharomyces exhibited exo-beta-(1 leads to 3)- and exo-beta-(1 leads to 6)-glucanase (EC 3.2.1.-) activities. (2) Using a combination of Sephadex G-100 and DEAE-cellulose chromatography, the exo-beta-(1 leads to 3)-glucanases from the cell extracts and culture fluid of Schizosaccharomyces japonicus var. versatilis were purified extensively. The enzymes from either location exhibited similar purification and other properties. (3) The purified enzymes hydrolysed the beta-(1 leads to 6)-glucosidic linkage in addition to the beta-(1 leads to 3) linkage. Heat denaturation, inhibition and electrophoretic studies indicated that both hydrolytic activities were properties of a single protein. Laminarin and pustulan hydrolysis followed Michaelis-Menten kinetics. The Km and V for laminarin hydrolysis were 6.25 mg/ml and 350 mumol of glucose released/min/mg protein, and for pustulan they were 166 mg/ml and 52 mumol of glucose released/min/mg protein. (4) The exo-beta-glucanase was assigned a molecular weight of 43 000. (5) the purified enzyme failed to hydrolyse isolated cell walls from either baker’s yeast or Schizosaccharomyces pombe or to induce protoplast formation from intact cells of S. japonicus var. versatilis or Saccharomyces cerevisiae.

https://pubmed.ncbi.nlm.nih.gov/1093