Suppr超能文献

FIT 与 ETHYLENE INSENSITIVE3/ETHYLENE INSENSITIVE3-LIKE1 转录因子的相互作用揭示了拟南芥中铁摄取调控和乙烯信号转导之间的分子联系。

Interaction between the bHLH transcription factor FIT and ETHYLENE INSENSITIVE3/ETHYLENE INSENSITIVE3-LIKE1 reveals molecular linkage between the regulation of iron acquisition and ethylene signaling in Arabidopsis.

机构信息

Department of Biosciences-Plant Biology, Saarland University, Saarbrucken, Germany.

出版信息

Plant Cell. 2011 May;23(5):1815-29. doi: 10.1105/tpc.111.084715. Epub 2011 May 17.

Abstract

Understanding the regulation of key genes involved in plant iron acquisition is of crucial importance for breeding of micronutrient-enriched crops. The basic helix-loop-helix protein FER-LIKE FE DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (FIT), a central regulator of Fe acquisition in roots, is regulated by environmental cues and internal requirements for iron at the transcriptional and posttranscriptional levels. The plant stress hormone ethylene promotes iron acquisition, but the molecular basis for this remained unknown. Here, we demonstrate a direct molecular link between ethylene signaling and FIT. We identified ETHYLENE INSENSITIVE3 (EIN3) and ETHYLENE INSENSITIVE3-LIKE1 (EIL1) in a screen for direct FIT interaction partners and validated their physical interaction in planta. We demonstrate that the ein3 eil1 transcriptome was affected to a greater extent upon iron deficiency than normal iron compared with the wild type. Ethylene signaling by way of EIN3/EIL1 was required for full-level FIT accumulation. FIT levels were reduced upon application of aminoethoxyvinylglycine and in the ein3 eil1 background. MG132 could restore FIT levels. We propose that upon ethylene signaling, FIT is less susceptible to proteasomal degradation, presumably due to a physical interaction between FIT and EIN3/EIL1. Increased FIT abundance then leads to the high level of expression of genes required for Fe acquisition. This way, ethylene is one of the signals that triggers Fe deficiency responses at the transcriptional and posttranscriptional levels.

摘要

了解植物铁吸收相关关键基因的调控对于培育富含微量营养素的作物至关重要。碱性螺旋-环-螺旋蛋白 FER-LIKE FE DEFICIENCY-INDUCED TRANSCRIPTION FACTOR(FIT)是根中铁吸收的核心调节剂,它在转录和转录后水平上受到环境线索和铁的内部需求的调节。植物应激激素乙烯促进铁的吸收,但这一过程的分子基础尚不清楚。在这里,我们证明了乙烯信号与 FIT 之间存在直接的分子联系。我们在筛选 FIT 直接相互作用伙伴时鉴定了 ETHYLENE INSENSITIVE3(EIN3)和 ETHYLENE INSENSITIVE3-LIKE1(EIL1),并在体内验证了它们的物理相互作用。我们证明,与野生型相比,缺铁时 ein3 eil1 转录组的变化比正常铁时更为明显。EIN3/EIL1 的乙烯信号对于 FIT 积累的完全水平是必需的。在应用氨基乙氧基乙烯基甘氨酸和 ein3 eil1 背景下,FIT 水平降低。MG132 可以恢复 FIT 水平。我们提出,在乙烯信号作用下,FIT 对蛋白酶体降解的敏感性降低,这可能是由于 FIT 和 EIN3/EIL1 之间的物理相互作用。FIT 丰度的增加继而导致铁吸收所需基因的高水平表达。这样,乙烯是触发铁缺乏反应在转录和转录后水平的信号之一。

相似文献

4
Transcriptome analysis of ein3 eil1 mutants in response to iron deficiency.
Plant Signal Behav. 2011 Nov;6(11):1669-71. doi: 10.4161/psb.6.11.17847.
7
Salt-induced stabilization of EIN3/EIL1 confers salinity tolerance by deterring ROS accumulation in Arabidopsis.
PLoS Genet. 2014 Oct 16;10(10):e1004664. doi: 10.1371/journal.pgen.1004664. eCollection 2014 Oct.
8
The Arabidopsis EIN3 binding F-Box proteins EBF1 and EBF2 have distinct but overlapping roles in ethylene signaling.
Plant Cell. 2007 Feb;19(2):509-23. doi: 10.1105/tpc.106.048140. Epub 2007 Feb 16.
9
Derepression of ethylene-stabilized transcription factors (EIN3/EIL1) mediates jasmonate and ethylene signaling synergy in Arabidopsis.
Proc Natl Acad Sci U S A. 2011 Jul 26;108(30):12539-44. doi: 10.1073/pnas.1103959108. Epub 2011 Jul 7.
10
MYB30 and ETHYLENE INSENSITIVE3 antagonistically modulate root hair growth in Arabidopsis.
Plant J. 2021 Apr;106(2):480-492. doi: 10.1111/tpj.15180. Epub 2021 Mar 18.

引用本文的文献

2
Combating plant diseases through transition metal allocation.
New Phytol. 2025 Mar;245(5):1833-1842. doi: 10.1111/nph.20366. Epub 2024 Dec 20.
6
The Arabidopsis RTH plays an important role in regulation of iron (Fe) absorption and transport.
Plant Cell Rep. 2024 Apr 30;43(5):133. doi: 10.1007/s00299-024-03214-x.
7
FER-like iron deficiency-induced transcription factor (FIT) accumulates in nuclear condensates.
J Cell Biol. 2024 Apr 1;223(4). doi: 10.1083/jcb.202311048. Epub 2024 Feb 23.
8
Melatonin Promotes Iron Reactivation and Reutilization in Peach Plants under Iron Deficiency.
Int J Mol Sci. 2023 Nov 9;24(22):16133. doi: 10.3390/ijms242216133.
10
Multilayered regulation of iron homeostasis in Arabidopsis.
Front Plant Sci. 2023 Sep 29;14:1250588. doi: 10.3389/fpls.2023.1250588. eCollection 2023.

本文引用的文献

2
Direct transcriptional control of the Arabidopsis immune receptor FLS2 by the ethylene-dependent transcription factors EIN3 and EIL1.
Proc Natl Acad Sci U S A. 2010 Aug 10;107(32):14502-7. doi: 10.1073/pnas.1003347107. Epub 2010 Jul 27.
6
EIN3/EIL1 cooperate with PIF1 to prevent photo-oxidation and to promote greening of Arabidopsis seedlings.
Proc Natl Acad Sci U S A. 2009 Dec 15;106(50):21431-6. doi: 10.1073/pnas.0907670106. Epub 2009 Nov 30.
9
Hydroponics on a chip: analysis of the Fe deficient Arabidopsis thylakoid membrane proteome.
J Proteomics. 2009 Apr 13;72(3):397-415. doi: 10.1016/j.jprot.2009.01.024.
10
Sulphur deprivation limits Fe-deficiency responses in tomato plants.
Planta. 2009 Jun;230(1):85-94. doi: 10.1007/s00425-009-0919-1. Epub 2009 Apr 7.

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验