Philipsen S, Suske G
Department of Cell Biology, Erasmus University Rotterdam, PO Box 1738, 3000 DR Rotterdam, The Netherlands and.
Nucleic Acids Res. 1999 Aug 1;27(15):2991-3000. doi: 10.1093/nar/27.15.2991.
One of the most common regulatory elements is the GC box and the related GT/CACC box, which are widely distributed in promoters, enhancers and locus control regions of housekeeping as well as tissue-specific genes. For long it was generally thought that Sp1 is the major factor acting through these motifs. Recent discoveries have shown that Sp1 is only one of many transcription factors binding and acting through these elements. Sp1 simply represents the first identified and cloned protein of a family of transcription factors characterised by a highly conserved DNA-binding domain consisting of three zinc fingers. Currently this new family of transcription factors has at least 16 different mammalian members. Here, we will summarise and discuss recent advances that have been directed towards understanding the biological role of these proteins.
最常见的调控元件之一是GC盒及相关的GT/CACC盒,它们广泛分布于管家基因以及组织特异性基因的启动子、增强子和基因座控制区。长期以来,人们普遍认为Sp1是通过这些基序起作用的主要因子。最近的发现表明,Sp1只是众多通过这些元件结合并起作用的转录因子之一。Sp1仅仅代表了一个转录因子家族中第一个被鉴定和克隆的蛋白质,该家族的特征是具有一个由三个锌指组成的高度保守的DNA结合结构域。目前,这个新的转录因子家族至少有16个不同的哺乳动物成员。在此,我们将总结并讨论在理解这些蛋白质的生物学作用方面所取得的最新进展。