パトゲンエフェクターは,時計と防衛の双重調節器であるTCP14をターゲットにすることで,昼夜間の免疫クロストラックを無効化する
Yu Wang1, Jiayue Wu1, Xuan Cui1
1College of Life Sciences, Capital Normal University, Beijing 100048, China; Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, Beijing 100048, China.
Cell reports
|February 14, 2026
まとめ
病原体は,重要な昼夜免疫インテグレーターである転写因子TCP14を標的にして,植物の免疫ハブを利用する. このサボタージは,時間隔離された植物の防御を妨害し,宿主リズムの脆弱性を明らかにします.
科学分野:
- 植物免疫 植物免疫とは
- シルカディアン生物学
- 分子植物病原体相互作用
背景:
- 病原体は,免疫ハブとして知られる重要な植物宿主タンパク質を標的とし,防御を克服します.
- 特定の宿主タンパク質が標的となる進化的理由は,完全に理解されていません.
研究 の 目的:
- シルカディアンリズムと植物免疫の間の潜在的なリンクとして,転写因子TCP14の役割を調査する.
- 病原体が植物の防御タイミングを妨害するメカニズムを解明する.
主な方法:
- 植物における時間経過RNAシーケンシング (RNA-seq) と遺伝子解析を活用した.
- 植物因子と病原体効果因子の間のタンパク質とタンパク質の相互作用を調査した.
- 時計と防衛遺伝子の転写的調節を調べました.
主要な成果:
- TCP14は,日経免疫インテグレーターとして作用し,そのレベルは,時計コンポーネントであるCCA1とZTLによってリズム的に制御されます.
- TCP14は,時計遺伝子の発現を直接調節し,リズム的な遺伝子発現,下皮細胞の成長,および防御反応に影響を与えます.
- 病原菌エフェクターであるHaRxL21は,TCP14と相互作用して,植物防衛遺伝子を抑制し,時間制限の免疫を妨害する.
結論:
- TCP14は,植物における防衛の優先順位付けに昼夜時刻を結びつける重要なネクサスとして機能します.
- 病原体は,このクロノ・イムニュスネクスを破壊し,宿主のリズムを乱し,感染を促進します.
- このメカニズムを理解することで,植物の防御戦略や病原体の毒性戦術の洞察が得られます.
関連する概念動画
Defenses Against Pathogens and Herbivores
29.7K
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
29.7K
Defense Against Bacterial Pathogens
3.0K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
3.0K
Circadian Rhythms and Gene Regulation
4.6K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.6K
Humoral Immune Responses
84.2K
Overview
84.2K
Immune Response Against Viral Pathogens
2.1K
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
2.1K
What is the Immune System?
133.3K
Overview
133.3K


