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Study on characteristics of protease produced by Mucor

Zheng Xiao-ting, Xin‐Huai Zhao

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Abstract

A strain of Mucor was isolated from a traditional fermented soy product.The basic properties of proteases excreted by Mucor were studied therefore.The results showed that the proteases had a higher activity in pH4 and 55℃ and had good stability in pH5~6 and 4℃.Some metal ions had influence on protease activity.Mn2+,Ca2+ and Mg2+ could activate protease activity but Zn2+,Fe2+,and Fe3+ could inhibit protease activity at level of 5.0mmol/L.Meanwhile NaCl showed an activation effect at low level but an inhibitory effect at high level.

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What this paper is about

A strain of Mucor was isolated from a traditional fermented soy product.The basic properties of proteases excreted by Mucor were studied therefore.The results showed that the proteases had a higher activity in pH4 and 55℃ and had good stability in pH5~6 and 4℃.Some metal ions had influence on protease activity.Mn2+,Ca2+ and Mg2+ could activate protease activity but Zn2+,Fe2+,and Fe3+ could inhibit protease activity at level of 5.0mmol/L.Meanwhile NaCl showed an activation effect at low level but an inhibitory effect at high level.

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Available abstract

A strain of Mucor was isolated from a traditional fermented soy product.The basic properties of proteases excreted by Mucor were studied therefore.The results showed that the proteases had a higher activity in pH4 and 55℃ and had good stability in pH5~6 and 4℃.Some metal ions had influence on protease activity.Mn2+,Ca2+ and Mg2+ could activate protease activity but Zn2+,Fe2+,and Fe3+ could inhibit protease activity at level of 5.0mmol/L.Meanwhile NaCl showed an activation effect at low level but an inhibitory effect at high level.

Key concepts: Proteases, Mucor, Protease, Chemistry, Fermentation, Biochemistry, Enzyme, Metal ions in aqueous solution

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