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    • 7. 发明授权
    • Process for the specific cleavage of protein sequences from proteins
    • 蛋白质序列特异性切割的方法
    • US4543329A
    • 1985-09-24
    • US395433
    • 1982-07-06
    • Joachim DaumGerhard SiewertMichael TopertHartmut Seliger
    • Joachim DaumGerhard SiewertMichael TopertHartmut Seliger
    • C07K14/575C07K14/61C07K14/62C12N15/62C12P21/06C12N15/00C12P21/02
    • C07K14/62C07K14/57554C07K14/61C12N15/62C12P21/06C07K2319/00C07K2319/50C07K2319/61C07K2319/75Y10S930/31
    • A process for cleavage of a protein (a) sequence from a protein containing the tetrapeptide sequence Pro-Xyz-Gly-Pro, wherein Xyz can be any desired amino acid, and reacting the protein with a collagenase whereby the Xyz-Gly bond is selectively cleaved, thereby producing a protein with the sequence Gly-Pro at its N-terminal end; or (b) containing the sequence Met-Pro; and subsequently selectively cleaving the glycine or methionine residue from the N-terminal end of the product protein with an aminoacylproline aminopeptidase and selectively cleaving the proline residue therefrom with a proline aminopeptidase; or subsequently selectively cleaving the Gly-Pro or Met-Pro residue from the N-terminal end of the produced protein using a postproline dipeptidylaminopeptidase. In a special embodiment, the protein which is split contains the sequence -Zxy-Uvw-Pro- on the carboxy end of the sequence Pro-Xyz-Gly-Pro, wherein Zxy and Uvw are independently any natural amino acid in the genetic code except Pro, whereby after the collagenase reaction, there is produced a protein with the sequence Gly-Pro-Zxy-Uvw-Pro at the N-terminal end. This is split by subsequently selectively cleaving the Pro-Zxy-bond by treating the protein with postproline dipeptidylaminopeptidase (PPDA), thereby producing protein having the sequence Zxy-Uvw-Pro at its N-terminal end, followed by cleaving the Zxy acid from the resultant protein by treating the latter with leucine aminopeptidase.
    • 从含有四肽序列Pro-Xyz-Gly-Pro的蛋白质中切割蛋白质(a)序列的方法,其中Xyz可以是任何所需的氨基酸,并使蛋白质与胶原酶反应,由此Xyz-Gly键是选择性的 从而在其N-末端产生具有Gly-Pro序列的蛋白质; 或(b)含有序列Met-Pro; 并随后用氨酰脯氨酸氨基肽酶选择性地从产物蛋白的N末端切割甘氨酸或甲硫氨酸残基,并用脯氨酸氨基肽酶选择性地切割脯氨酸残基; 或随后使用后脯氨酸二肽基氨基肽酶从产生的蛋白质的N末端选择性地切割Gly-Pro或Met-Pro残基。 在一个特殊的实施方案中,分裂的蛋白质包含序列Pro-Xyz-Gly-Pro的羧基末端的序列-Zxy-Uvw-Pro,其中Zxy和Uvw独立地是遗传密码中的任何天然氨基酸, Pro,由此在胶原酶反应之后,在N末端产生具有序列Gly-Pro-Zxy-Uvw-Pro的蛋白质。 通过用后脯氨酸二肽基氨基肽酶(PPDA)处理蛋白质随后选择性地切割Pro-Zxy-键,从而在其N-末端产生具有序列Zxy-Uvw-Pro的蛋白质,随后将Zxy酸从 通过用亮氨酸氨基肽酶处理后者产生的蛋白质。