首页> 外文期刊>Molecular and Cellular Biology >Mediators of activation of fushi tarazu gene transcription by BmFTZ-F1.
【24h】

Mediators of activation of fushi tarazu gene transcription by BmFTZ-F1.

机译:通过BmFTZ-F1激活fushi tarazu基因转录的介体。

获取原文
           

摘要

Transcriptional activation by many eukaryotic sequence-specific regulators appears to be mediated through transcription factors which do not directly bind to DNA. BmFTZ-F1 is a silkworm counterpart of FTZ-F1, a sequence-specific activator of the fushi tarazu gene in Drosophila melanogaster. We report here the isolation of 18- and 22-kDa polypeptides termed MBF1 and MBF2, respectively, that form a heterodimer and mediate activation of in vitro transcription from the fushi tarazu promoter by BmFTZ-F1. Neither MBF1, MBF2, nor a combination of them binds to DNA. MBF1 interacts with BmFTZ-F1 and stabilizes the BmFTZ-F1-DNA complex. MBF1 also makes direct contact with TATA-binding protein (TBP). Both MBF1 and MBF2 are necessary to form a complex between BmFTZ-F1 and TBP. We propose a model in which MBF1 and MBF2 form a bridge between BmFTZ-F1 and TBP and mediate transactivation by stabilizing the protein-DNA interactions.
机译:许多真核生物序列特异性调节子的转录激活似乎是通过不直接与DNA结合的转录因子介导的。 BmFTZ-F1是FTZ-F1的家蚕对应物,FTZ-F1是果蝇中fushi tarazu基因的序列特异性激活剂。我们在这里报告分别称为MBF1和MBF2的18-kDa和22-kDa多肽的分离,它们形成异二聚体并介导BmFTZ-F1从fushi tarazu启动子体外转录的激活。 MBF1,MBF2或它们的组合都不会与DNA结合。 MBF1与BmFTZ-F1相互作用并稳定BmFTZ-F1-DNA复合物。 MBF1也直接与TATA结合蛋白(TBP)接触。 MBF1和MBF2都是在BmFTZ-F1和TBP之间形成复合体所必需的。我们提出了一个模型,其中MBF1和MBF2在BmFTZ-F1和TBP之间形成桥梁,并通过稳定蛋白质-DNA相互作用来介导反式激活。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号