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A mutually assured destruction mechanism attenuates light signaling in Arabidopsis

机译:相互保证的破坏机制减弱了拟南芥中的光信号。

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摘要

After light-induced nuclear translocation, phytochrome photoreceptors interact with and induce rapid phosphorylation and degradation of basic helix-loop-helix transcription factors, such as PHYTOCHROME-INTERACTING FACTOR 3 (PIF3), to regulate gene expression. Concomitantly, this interaction triggers feedback reduction of phytochrome B (phyB) levels. Light-induced phosphorylation of PIF3 is necessary for the degradation of both proteins. We report that this PIF3 phosphorylation induces, and is necessary for, recruitment of LRB [Light-Response Bric-a-Brack/Tramtrack/Broad (BTB)] E3 ubiquitin ligases to the PIF3-phyB complex. The recruited LRBs promote concurrent polyubiqutination and degradation of both PIF3 and phyB in vivo. These data reveal a linked signal-transmission and attenuation mechanism involving mutually assured destruction of the receptor and its immediate signaling partner.
机译:在光诱导的核易位后,植物色素光感受器与碱性螺旋-环-螺旋转录因子(如植物染色体相互作用因子3(PIF3))相互作用并诱导其快速磷酸化和降解,从而调节基因表达。同时,这种相互作用触发了植物色素B(phyB)水平的反馈降低。 PIF3的光诱导磷酸化对于两种蛋白质的降解都是必需的。我们报告此PIF3磷酸化诱导,并且是LRB [光响应金砖四国/ Brack / Tramtrack / Broad(BTB)] E3泛素连接酶募集至PIF3-phyB复合物所必需的。募集的LRB在体内促进并发多泛素化和PIF3和phyB降解。这些数据揭示了一种相互关联的信号传输和衰减机制,涉及相互确保破坏受体及其直接信号伴侣。

著录项

  • 来源
    《Science》 |2014年第6188期|1160-1164|共5页
  • 作者单位

    Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA 94720, USA,Plant Gene Expression Center, Agriculture Research Service (ARS), U.S. Department of Agriculture (USDA), Albany, CA 94710, USA;

    Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94143, USA,Department of Plant Biology, Carnegie Institution for Science, Stanford, CA 94305, USA;

    Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA 94720, USA,Plant Gene Expression Center, Agriculture Research Service (ARS), U.S. Department of Agriculture (USDA), Albany, CA 94710, USA;

    Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94143, USA;

    Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94143, USA;

    Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94143, USA;

    Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94143, USA;

    Department of Plant Biology, Carnegie Institution for Science, Stanford, CA 94305, USA;

    Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA 94720, USA,Plant Gene Expression Center, Agriculture Research Service (ARS), U.S. Department of Agriculture (USDA), Albany, CA 94710, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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  • 入库时间 2022-08-18 02:52:26

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