植物における酸素感知は,タンパク質の不安定化のためのN端の規則経路によって媒介されます
Francesco Licausi1, Monika Kosmacz, Daan A Weits
1Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg 1, 14476, Potsdam-Golm, Germany. f.licausi@sssup.it
Nature
|October 25, 2011
まとめ
植物には新しい酸素感知機構があります. N-endルール経路は,正常な酸素下ではRAP2.12タンパク質を分解するが,低酸素期には安定させ,適応反応を活性化させ,洪水耐性を高める.
科学分野:
- 植物生物学 植物生物学
- 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:
- ユカリオットはエネルギー生産のために酸素を必要とし,酸素不足は適応反応を引き起こします.
- 酸素を感知するメカニズムは存在するが,王国特有であり,現在まで植物では確認されていない.
研究 の 目的:
- 植物における酸素感知機構を特定する.
- 植物酸素感知におけるN-endルール経路の役割を明らかにする.
主な方法:
- アラビドプシス・タリアナのユビキチン依存性Nエンドルル経路を調査した.
- エチレン応答因子 (ERF) の転写因子における保存されたアミノ端末配列を特定した.
- 異なる酸素条件下でRAP2.12の翻訳後の改変とタンパク質分解を分析した.
主要な成果:
- N-end ルール経路の枝は,Arabidopsis.の酸素センサーとして作用する.
- 転写因子RAP2.12は,酸素に依存する分解配列を持っています.
- 低酸素 (低酸素) 状態では,RAP2.12が核に蓄積し,適応のための遺伝子発現を活性化します.
結論:
- N-endルール経路とRAP2.12.2によって媒介される植物における新しい酸素感知機構を発見した.
- この発見は,改善された低酸素適応による作物の洪水耐性を高めるための道を開きます.
関連する概念動画
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...
Oxygen Requirements and Growth Patterns
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
Key Elements for Plant Nutrition
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the atmosphere, the...
The Calvin Benson Cycle
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
Oxygenic Photosynthesis
Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate light...
Riboswitches
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...


