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. 1983 Mar;71(3):460-5.
doi: 10.1104/pp.71.3.460.

beta-1,3-Endoglucanase from Soybean Releases Elicitor-Active Carbohydrates from Fungus Cell Walls

N T Keen  1 , M Yoshikawa
Affiliations

beta-1,3-Endoglucanase from Soybean Releases Elicitor-Active Carbohydrates from Fungus Cell Walls

N T Keen et al. Plant Physiol. 1983 Mar.

Abstract

Two enzymes from soybean (Glycine max L. Merr. cv Harosoy 63) cotyledons released elicitor-active carbohydrates from cell walls of the phytopathogenic fungus Phytophthora megasperma f.sp. glycinea. They were identified as isoenzymes of beta-1,3-endoglucanase (EC 3.2.1.39) with isoelectric points of pH 8.7 and 10.5. The pI 10.5 enzyme was extracted in the greatest amount and was isolated as a homogeneous protein of about 33,000 daltons as determined by gel filtration and sodium dodecyl sulfategel electrophoresis. The purified enzymes hydrolyzed several beta-1,3-glucans in a strictly random manner, but degraded neither beta-1,6- nor beta-1,4-glucans.

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