A small deletion in the carboxy terminus of the viral myc gene renders the virus MC29 partially transformation defective in avian fibroblasts.

A small deletion in the carboxy terminus of the viral myc gene renders the virus MC29 partially transformation defective in avian fibroblasts.
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病毒myc基因羧基末端的一个小缺失使得病毒MC29在禽类成纤维细胞中部分转化缺陷。

DOI:
10.1016/0042-6822(89)90265-1
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发表时间:
1989
期刊:
影响因子:
3.7
通讯作者:
Enrietto,PJ
Enrietto,PJ
中科院分区:
医学3区
文献类型:
--
作者:
Enrietto,PJ

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为了研究病毒霉菌蛋白的羧基末端在禽类成纤维细胞和巨噬细胞转化中的作用,我们创造了几个Bal31缺失突变体,它们去除了真菌蛋白羧基末端的不同部分。只有一个这样的突变体,S90.9,在巨噬细胞和成纤维细胞中测试时,失去了我的菌体的九个氨基酸,具有生物活性。该突变体转化禽类巨噬细胞的方式与野生型相似,但在成纤维细胞中似乎存在部分转化缺陷。与野生型感染细胞相比,感染S90.9的鸡胚成纤维细胞在形态上表现出中等的表型。当测试在软琼脂中的生长、细胞表面有无肌动蛋白缆线和纤维连接蛋白以及生长速度时,与野生型或辅助病毒感染的成纤维细胞相比,S90.9感染的细胞表现出中等的行为。这些实验表明,真菌蛋白的羧基末端在本质上是高度碱性的,参与了禽类成纤维细胞的转化。
In order to characterize the role of the carboxy terminus of the viralmycprotein in the transformation of avian fibroblasts and macrophages, severalBal31 deletion mutants were created which removed varying portions of the carboxy terminus of themycprotein. Only one such mutant, S90.9, which had lost nine amino acids ofmycretained biological activity when tested in macrophages and fibroblasts. This mutant transformed avian macrophages in a manner similar to that of wild-type, but appeared to be partially transformation defective in fibroblasts. Chicken embryo fibroblast cultures infected with S90.9 exhibited an intermediate phenotype morphologically when compared to wild-type-infected cells. When tested for growth in soft agar, the presence or absence of actin cables and fibronectin on the cell surface, and growth rate, S90.9-infected cells showed intermediate behavior when compared to wild-type or helper virus-infected fibroblasts. These experiments suggest that the carboxy terminus of themycprotein, which is highly basic in nature, is involved in the transformation of avian fibroblasts.
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