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Transcriptional Regulation of the Human TATA Binding Protein Gene.

机译:人TATA结合蛋白基因的转录调控。

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The human TATA binding protein (TBP) locus consists of a functional domain of three closely linkedhousekeeping genes (TBP, PSMB1 (proteasomal C5 subunit), and PDCD2 (programmed cell death-2)) within a 50-kb interval at chromosome position 6q27. Here we demonstrate that a genomic clone spanning the 20-kb TBP gene, with 12 kb 5' and 3' flanking sequences, was fully functional in stable, transfected L-cells harboring a single copy of this transgene, including after long-term (60 day) culture in the absence of drug selective pressure. Furthermore, we were only able to detect DNaseI hypersensitive sites at the TBP and PSMB1 promoters present within this 44-kb fragment. Our data suggest that this 44-kb genomic region possesses genetic regulatory elements that not only drive ubiquitous expression of TBP but also negate chromatin and DNA methylation induced silencing, which is normally associated with transgenes stably integrated into tissue culture cells. (c)2002 Elsevier Science (USA).
机译:人TATA结合蛋白(TBP)基因座由三个紧密连锁的管家基因(TBP,PSMB1(蛋白酶C5亚基)和PDCD2(程序性细胞死亡2))的功能域组成,在染色体位置6q27处的间隔为50 kb。在这里,我们证明了跨越20kb TBP基因,具有12kb 5'和3'侧翼序列的基因组克隆在稳定的,转染的L细胞中具有完整功能,该L细胞具有该转基因的单个拷贝,包括长期( 60天)在没有药物选择压力的情况下进行培养。此外,我们仅能够在此44 kb片段中存在的TBP和PSMB1启动子上检测DNaseI超敏位点。我们的数据表明,这个44kb的基因组区域具有遗传调控元件,不仅可以驱动TBP的普遍表达,而且可以消除染色质和DNA甲基化诱导的沉默,而沉默通常与稳定整合到组织培养细胞中的转基因有关。 (c)2002 Elsevier Science(美国)。

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