Smith J, Soriano L
Nucleic Acids Res. 1977 Mar;4(3):641-8. doi: 10.1093/nar/4.3.641.
A DNA polymerising complex directed by endogenous DNA has been partially purified from 11-day-old embryonic chick brain microsomes by DEAE-cellulose and phosphocellulose column chromatography. The active fractions are eluted together with an exogenous DNA-directed DNA polymerase; after Sephadex gel filtration, the endogenous activity remains associated with a high molecular weight DNA-directed DNA polymerase. The endogenous activity of the complex has been shown to be RNase-resistant and actinomycin-sensitive. It requires potassium, an ATP-regenerating system and all four deoxyribonucleoside triphosphates for full activity. The significance of this activity with regard to the protovirus hypothesis is discussed.
通过二乙氨基乙基纤维素(DEAE -纤维素)和磷酸纤维素柱层析法,已从11日龄鸡胚脑微粒体中部分纯化出一种由内源性DNA指导的DNA聚合酶复合物。活性组分与外源性DNA指导的DNA聚合酶一起被洗脱;经葡聚糖凝胶过滤后,内源性活性仍与一种高分子量的DNA指导的DNA聚合酶相关联。已证明该复合物的内源性活性对核糖核酸酶(RNase)具有抗性,而对放线菌素敏感。它需要钾、一个ATP再生系统以及所有四种脱氧核糖核苷三磷酸才能发挥完全活性。本文讨论了这种活性对于前病毒假说的意义。