Soluble form of PrP.sup.SC which is insoluble in native form
    8.
    发明授权
    Soluble form of PrP.sup.SC which is insoluble in native form 失效
    可溶形式的PrPSC,其不溶于天然形式

    公开(公告)号:US5834593A

    公开(公告)日:1998-11-10

    申请号:US740947

    申请日:1996-11-05

    摘要: The invention includes deleting codon segments from DNA expressing a native protein (e.g., PrP.sup.Sc) in order to obtain a shorter, soluble protein which mimics characteristics of an insoluble native (e.g., PrP.sup.Sc) protein. Soluble proteins of the invention are characterized by: (1) having less amino acids than the full length native protein; (2) having a higher degree of solubility than the native protein; (3) retaining the basic biological characteristics of the native protein such as (a) not being subject to enzymatic digestion and (b) causing disease. Soluble proteins of the invention are obtained by providing a DNA sequence which encodes a native protein and systematically removing codons, making copies of the shortened versions of DNA which are then expressed to provide the shortened proteins. The shortened proteins are then tested for solubility. Soluble proteins are then further tested to confirm that they retain the biological characteristics of the native protein. The soluble form can also be created by adding amino acids, binding a hydrophilic moiety to the native protein or combinations of deleting, adding, and binding hydrophilic moieties to the protein.

    摘要翻译: 本发明包括从表达天然蛋白质(例如PrPSc)的DNA中删除密码子片段,以获得模拟不溶性天然(例如PrPSc)蛋白质特征的较短的可溶性蛋白质。 本发明的可溶性蛋白质的特征在于:(1)具有比全长天然蛋白质少的氨基酸; (2)具有比天然蛋白质更高的溶解度; (3)保留天然蛋白质的基本生物学特性,如(a)不经酶消化和(b)引起疾病。 通过提供编码天然蛋白质的DNA序列并系统地除去密码子,制备DNA的缩短形式的拷贝,然后进行表达以提供缩短的蛋白质,从而获得本发明的可溶性蛋白质。 然后测试缩短的蛋白质的溶解度。 然后进一步测试可溶性蛋白质以证实它们保留天然蛋白质的生物学特性。 可溶性形式也可以通过加入氨基酸,将亲水部分结合到天然蛋白质或者将蛋白质的缺失,添加和结合亲水部分的组合来产生。