Chemical hijacking of auxin signaling with an engineered auxin-TIR1 pair.

Chemical hijacking of auxin signaling with an engineered auxin-TIR1 pair.
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DOI:
10.1038/nchembio.2555
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发表时间:
2018-03
影响因子:
14.8
通讯作者:
Torii KU
Torii KU
中科院分区:
生物学1区
文献类型:
--
作者:
Uchida N;Takahashi K;Iwasaki R;Yamada R;Yoshimura M;Endo TA;Kimura S;Zhang H;Nomoto M;Tada Y;Kinoshita T;Itami K;Hagihara S;Torii KU

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植物激素生长素,吲哚-3-乙酸(IAA),调节植物生长发育的几乎所有方面。尽管我们对生长素生物学的理解取得了实质性进展,但描述特定的生长素反应仍然是一个主要挑战。生长素通过受体TIR1/AFB F-box蛋白调节转录反应。在这里,我们报道了一个工程的,正交的生长素-TIR1受体对,通过凹凸孔策略开发,触发生长素信号而不干扰内源性生长素或TIR1/ afb。合成的凸IAA (cvxIAA)在体内转录组水平和特定发育背景下劫持下游生长素信号,仅在互补的凹TIR1 (ccvTIR1)受体存在的情况下。利用cvxia - ccvtir1系统,我们为tir1介导的途径在生长素诱导的幼苗酸生长中的作用提供了确凿的证据。cvxia - ccvtir1系统是解决生长素生物学中悬而未决的问题和精确操纵生长素介导的过程作为一个可控开关的强大工具。
The phytohormone auxin, indole-3-acetic acid (IAA), regulates nearly all aspects of plant growth and development. Despite substantial progress in our understanding of auxin biology, delineating specific auxin response remains as a major challenge. Auxin regulates transcriptional response via its receptors, TIR1/AFB F-box proteins. Here we report an engineered, orthogonal auxin-TIR1 receptor pair, developed through a bump-and-hole strategy, that triggers auxin signaling without interfering with endogenous auxin or TIR1/AFBs. A synthetic, convex IAA (cvxIAA) hijacked the downstream auxin signaling in vivo both at the transcriptomic level and in specific developmental contexts, only in the presence of a complementary, concave TIR1 (ccvTIR1) receptor. Harnessing the cvxIAA-ccvTIR1 system, we provide conclusive evidence for the role of TIR1-mediated pathway in auxin-induced seedling acid growth. The cvxIAA-ccvTIR1 system serves as a powerful tool for solving outstanding questions in auxin biology and for precise manipulation of auxin-mediated processes as a controllable switch.
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