プラントSARパズルの別のギャップを埋める
1Max-Planck-Institut für Zuechtungsforschung, Abteilung Molekulare Phytopathologie, Carl-von-Linné Weg 10, D-50829, Koeln, Germany.
Cell
|July 3, 2003
まとめ
植物の免疫系とは
科学分野:
- 植物免疫 植物免疫とは
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- サリシル酸 (SA) は,病原体に対する防御反応を調節する重要な植物ホルモンです.
- NPR1タンパク質は,SA媒介の植物防御経路の中心的成分である.
研究 の 目的:
- 系統的獲得抵抗 (SAR) 中のNPR1活性化の分子メカニズムを調査する.
- NPR1機能における細胞リドックス変化の役割を明らかにする.
主な方法:
- この研究では,アラビドプシス・タリアナをモデル生物として利用した.
- SA治療に対する反応として,タンパク質構成の変化と細胞の酸化還元状態を調査した.
主要な成果:
- NPR1が静止状態で不活性オリゴーマーとして存在することを実証しました.
- SA治療は細胞のリドックス変化を誘導し,NPR1オリゴマーの解離を活性モノマーに導くことを示した.
- この移行は,プラントの防御経路を活性化するために不可欠であることを確認しました.
結論:
- アラビドプシス NPR1の活性化は,酸化還元に依存するプロセスです.
- SAシグナリングは,NPR1の非活性オリゴーマーから活性モノーマーへの構成的シフトを誘発し,病原体の耐性を促進します.
関連する概念動画
Gap Junctions
Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
Plasmodesmata
The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. 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 alike. However, different types of junctions are found in different kinds of cells. Intercellular junctions found in animal...
The Phragmoplast
Cell division is essential for organismal growth and development. In animal cells, the central spindle and its associated proteins form the midbody, a structure that has an essential role in cytokinesis. In plants, the central spindle, along with the microtubules, actin, and other cell components, matures into the phragmoplast, which is necessary for cytokinesis. Unlike the stationary midbody, the phragmoplast expands centrifugally, eventually leading to the formation of the new cell wall.
The...
The...
Cell Signaling in Plants
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
Gap Junctions
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
Plasmodesmata
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...


