ウスティラゴ・メイディスは,炭水化物のシグナル伝達ネットワークを混乱させ,宿主細胞の縮を引き起こします
Yoon Joo Lee1, Dong Zhang1, Sara Christina Stolze2
1Institute for Plant Sciences and Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, Cologne, Germany.
Nature communications
|February 20, 2026
まとめ
研究者らは,Hap1 (ハイパートロフィー関連タンパク質1) をウスティラゴ・メイディス感染症の重要な要因として特定しました. Hap1は,植物防御を抑制しながら,細胞サイクルと代謝を再プログラムすることによって,トウモロコシの葉の腫瘍の成長を促します.
科学分野:
- 植物病理学 植物病理学
- 分子植物-微生物の相互作用
- マイスの遺伝学
背景:
- ウスティラゴ・メイディス感染症は,未知のメカニズムにより,トウモロコシの葉の腫瘍を引き起こす.
- 過剰な細胞増殖 (高縮) は,これらの感染症の特徴です.
研究 の 目的:
- トウモロコシメソフィルの細胞高縮を調節する毒性の要因を特定する.
- ウスティラゴ菌の分子メカニズムを解明する 植物成長再プログラムが誘発される可能性.
主な方法:
- Hap1機能を研究するためのCRISPR-Cas9変異.
- Hap1調節遺伝子を特定するためのトランスクリプトミックの分析.
- 研究されたタンパク質の相互作用とリン酸化現象.
主要な成果:
- Hap1 (ハイパートロフィー関連タンパク質1) は,効果因子および毒性の因子として特定されました.
- Hap1は,感染したトウモロコシのエンドロデプリケーションと粉の蓄積を促進します.
- Hap1は,粉の生物合成と細胞サイクル遺伝子を上調し,同時に植物の防御を抑制する.
結論:
- Hap1はトウモロコシの代謝と細胞サイクルを再プログラムし,高縮を引き起こします.
- Hap1はSnRK1の信号経路を調節して,粉の合成と防御を制御する.
- Hap1は,トウモロコシにおけるUstilago maydisの重要な毒性の要因である.
さらに関連する動画
関連する概念動画
Role Of Notch Signalling In Intestinal Stem Cell Renewal
2.5K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
2.5K
Fungal Group Zygomycota
1.6K
Zygomycota, previously classified as a distinct fungal group, are primarily terrestrial, saprophytic molds that play a crucial role as decomposers. Recent phylogenetic studies have revealed that these fungi are now divided into two major clades — Mucoromycota, which includes many symbiotic species, and Zoopagomycota, which primarily consists of parasitic and pathogenic fungi. These groups exhibit distinct ecological roles and reproductive strategies while sharing key structural and...
1.6K
Yeast Signaling
18.0K
Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
18.0K
Global Regulatory Systems
759
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
759
cAMP-dependent Protein Kinase Pathways
8.6K
Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
8.6K
mTOR Signaling and Cancer Progression
4.9K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.9K


