Weintraub H, Hauschka S, Tapscott S J
Howard Hughes Medical Institute, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.
Proc Natl Acad Sci U S A. 1991 Jun 1;88(11):4570-1. doi: 10.1073/pnas.88.11.4570.
p53 is an antioncogene that is defective or absent in a large number of human tumors. Its function in normal cells is not known. We show that co-transfection of mouse p53 with muscle-specific creatine kinase-chloramphenicol acetyltransferase reporter gene, containing 3.3 kilobase of upstream control sequence for the muscle-specific creatine kinase gene, results in a 10- to 80-fold activation. The p53 responsive element maps to a region distinguished from the known MyoD binding region. Identification of a p53 responsive element should allow a more focused analysis of the effects of p53 in controlling gene activity.
p53是一种抗癌基因,在大量人类肿瘤中存在缺陷或缺失。其在正常细胞中的功能尚不清楚。我们发现,将小鼠p53与肌肉特异性肌酸激酶-氯霉素乙酰转移酶报告基因共转染,该报告基因含有3.3千碱基的肌肉特异性肌酸激酶基因上游控制序列,可导致10至80倍的激活。p53反应元件定位于一个与已知MyoD结合区域不同的区域。p53反应元件的鉴定应有助于更有针对性地分析p53在控制基因活性方面的作用。