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1. 发明授权

US06168939A Endopeptidase produced by Lactobacillus helveticus 失效
标题翻译：由瑞士乳杆菌产生的内肽酶
公开(公告)号：US06168939A
公开(公告)日：2001-01-02
申请号：US08611395
申请日：1996-03-06
申请人： Masahiro Sasaki , Boukje Bosman , Paris S. T. Tan , Shin'ichi Takafuji , Taisuke Iwasaki
发明人： Masahiro Sasaki , Boukje Bosman , Paris S. T. Tan , Shin'ichi Takafuji , Taisuke Iwasaki
IPC分类号： C12N950
CPC分类号： C12N9/52
摘要： An endopeptidase produced by Lactobacillus helveticus which hydrolyzes peptides with about 3-34 amino acid residues, but not proteins, has been discovered. The enzyme has a molecular weight of about 70 kDa, an isoelectric point of about 4.8, an optimal temperature of about 30° C. and an optimal pH of about 7.0. No homologous endopeptidase was found in a data base search of the N-terminal amino acid sequence of the enzyme, and thus the enzyme is novel. The endopeptidase can be used together with proteolytic enzymes such as proteinases and aminopeptidases using the substrate specificity of the endopeptidase to effectively degrade proteins. The endopeptidase can be applied singly to selectively produced specific peptides. The protein hydrolysate can be used for the preparation of foods, drinks and medicines.
摘要翻译：已经发现了由瑞士乳杆菌产生的内肽酶，其水解具有约3-34个氨基酸残基而不是蛋白质的肽。该酶的分子量约为70kDa，等电点为约4.8，最适温度为约30℃，最佳pH为约7.0。在酶的N-末端氨基酸序列的数据库搜索中没有发现同源的内肽酶，因此该酶是新的。内肽酶可以与蛋白水解酶如蛋白酶和氨基肽酶一起使用，使用内肽酶的底物特异性来有效降解蛋白质。内肽酶可以单独应用以选择性地产生特异性肽。蛋白质水解物可用于食品，饮料和药物的制备。

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