Forrester W C, Takegawa S, Papayannopoulou T, Stamatoyannopoulos G, Groudine M
Division of Basic Sciences, Genetics, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.
Nucleic Acids Res. 1987 Dec 23;15(24):10159-77. doi: 10.1093/nar/15.24.10159.
We have analyzed the chromatin structure of the human beta-globin locus in somatic cell hybrids resulting from the fusion of human non-erythroid cells and mouse erythroleukemia (MEL) cells. In these hybrids, the human adult beta-globin gene, but neither the embryonic nor fetal globin genes, is activated transcriptionally. In addition, the DNase I-resistant beta-like globin locus characteristic of the parental non-erythroid human cells (1,2) is reorganized over an approximately 80 kb region, including the formation of the developmentally stable hypersensitive sites 50 kb 5' and 20 kg 3' of the activated adult beta-globin gene (2,3). These results are consistent with the hypothesis that events occurring at the 5' and/or 3' developmentally stable hypersensitive sites are important, if not necessary, for the activation of the beta-globin locus.
我们分析了人非红细胞与小鼠红白血病(MEL)细胞融合产生的体细胞杂种中人类β-珠蛋白基因座的染色质结构。在这些杂种中,人类成人β-珠蛋白基因被转录激活,但胚胎和胎儿珠蛋白基因均未被激活。此外,亲本非红细胞人类细胞特有的对DNA酶I有抗性的β-样珠蛋白基因座在大约80 kb的区域内发生了重组,包括在激活的成人β-珠蛋白基因5'端50 kb和3'端20 kb处形成发育稳定的超敏感位点(2,3)。这些结果与以下假设一致,即发生在5'和/或3'发育稳定超敏感位点的事件对于β-珠蛋白基因座的激活很重要,即使不是必需的。