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Isolation and characterization of extra- and intra-cellular metal proteinases produced in the spawn-running process ofHypsizygus marmoreus

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Mycoscience

Abstract

Isolation and characterization of extra-(PE-1) and intra-cellular (PE-2) metal proteinases produced during the spawn-running process ofHypsizygus marmoreus were carried out. These enzymes were the most active toward Hammarsten casein at pH 7.0 (PE-1) and pH 6.5–7.5 (PE-2). The molecular weight and pl value of PE-1 were 29,500, 8.8 and those of PE-2 were 21,500, 8.4. Km values against the synthetic peptide substrate Z-Gly-l-Leu-NH2 were 0.9×10−3M (PE-1) and 1.2×10−3M (PE-2). PE-1 was strongly inhibited by phosphoramidon, whereas PE-2 was weakly inhibited. These enzymes are considered to play an important role in providing nitrogenous substrates during fruit-body formation.

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Terashita, T., Inoue, T., Nakaie, Y. et al. Isolation and characterization of extra- and intra-cellular metal proteinases produced in the spawn-running process ofHypsizygus marmoreus . Mycoscience 38, 243–245 (1997). https://doi.org/10.1007/BF02460859

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