バクテリアの病原体は,植物細胞に水と溶液を透過する経路を運ぶ
Kinya Nomura1,2, Felipe Andreazza1, Jie Cheng3
1Department of Biology, Duke University, Durham, NC, USA.
Nature
|September 13, 2023
まとめ
AvrEファミリーのバクテリアエフェクターはポリンのようなチャネルを形成し,病原体の毒性を促進する. ポリアミドアミンのデンドリマーはこれらのチャネルを遮断し 細菌の感染を抑制し 新しい治療戦略を提示します
科学分野:
- 微生物学
- 分子生物学
- 生物化学
背景:
- バクテリアの病原体は,病気の発生に不可欠なエフェクタータンパク質を宿主細胞に供給するために,タイプIIIの分泌システムを利用します.
- DspEとAvrEを含むAvrEファミリーのエフェクターは,植物病原菌に保存され",水浸し"と宿主細胞死亡を誘発することにより,毒性に関与します.
研究 の 目的:
- AvrEファミリーのエフェクターの生化学的機能と構造を明らかにする.
- AvrEファミリーのエフェクタ活性の潜在的な阻害剤を特定する.
主な方法:
- 構造分析はベータバーレルの折りたたみで バクテリアのポリンに似ています
- Xenopusの卵細胞とリポソームの復元による機能検査でチャネル活性が評価される.
- 毛穴遮断剤を特定するための化学スクリーニング
主要な成果:
- AvrEファミリーのエフェクターは,水と小分子に浸透する機能的チャネルを形成します.
- ポリアミドアミンのデンドリマーはDspE/AvrEチャネルの阻害体として特定された.
- ポリアミドアミンは,AvrEとDSPEの毒性をin vitroとin vivoで広く抑制することが示された.
結論:
- AvrEファミリーのエフェクターは,ポリンのようなチャネルとして機能し,細菌の病原性におけるその役割を説明する.
- ポリアミドアミンのデンドリマーは,これらの重要な毒性の要因を標的とした有望な抑制剤のクラスです.
関連する概念動画
The Apoplast and Symplast
50.6K
Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
50.6K
Water and Mineral Acquisition
33.2K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
33.2K
Short-distance Transport of Resources
16.1K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
16.1K
Xylem and Transpiration-driven Transport of Resources
24.0K
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
24.0K
Plasmodesmata
2.9K
In a multicellular organism, cells must communicate to work together in a coordinated manner. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
Intercellular junctions are a feature of fungal, plant, and animal cells. However, different types of junctions are found in different kinds of cells. Intercellular junctions found in animal cells include tight junctions, gap junctions, and...
Intercellular junctions are a feature of fungal, plant, and animal cells. However, different types of junctions are found in different kinds of cells. Intercellular junctions found in animal cells include tight junctions, gap junctions, and...
2.9K
Tonicity in Plants
53.6K
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
53.6K


