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病毒src基因产物与哺乳动物环磷酸腺苷(cAMP)依赖性蛋白激酶的催化链相关。

Viral src gene products are related to the catalytic chain of mammalian cAMP-dependent protein kinase.

作者信息

Barker W C, Dayhoff M O

出版信息

Proc Natl Acad Sci U S A. 1982 May;79(9):2836-9. doi: 10.1073/pnas.79.9.2836.

Abstract

The transforming protein sequences translated from the Rous avian and Moloney murine sarcoma virus src genes are shown to be related to the catalytic chain of bovine cAMP-dependent protein kinase (ATP:protein phosphotransferase, EC 2.7.1.37). The avian transforming protein, also a protein kinase, shows greatest homology with the bovine protein kinase in the carboxyl-terminal half, where the protein kinase activity is localized. Moreover, lysine occurs in the inferred transforming protein sequences at the position homologous with the proposed ATP-binding lysine of the bovine protein kinase. This relationship is consistent with the hypothesis that the src genes originated in the host genomes, in which they are members of a superfamily of distantly related protein kinases that are normal constituents of mammalian cells. In the host, these sequences are much more highly conserved than in the viruses.

摘要

从劳氏禽肉瘤病毒和莫洛尼鼠肉瘤病毒src基因翻译而来的转化蛋白序列,被证明与牛cAMP依赖性蛋白激酶(ATP:蛋白质磷酸转移酶,EC 2.7.1.37)的催化链相关。禽转化蛋白也是一种蛋白激酶,在羧基末端的一半区域与牛蛋白激酶具有最大的同源性,而蛋白激酶活性就定位于该区域。此外,在推断的转化蛋白序列中,赖氨酸出现在与牛蛋白激酶假定的ATP结合赖氨酸同源的位置。这种关系与src基因起源于宿主基因组的假说一致,在宿主基因组中,它们是哺乳动物细胞正常组成部分的远亲蛋白激酶超家族的成员。在宿主中,这些序列比在病毒中保守得多。

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