関連する実験動画
Updated: Sep 9, 2025

08:44
Isolation of F1-ATPase from the Parasitic Protist Trypanosoma brucei
Published on: January 22, 2019
7.4K
プラスティドF1FO-ATP合成酵素の進化と規制の多様化
Kaori Kohzuma1, Sota Muraoka1, Minoru Kumazawa1
1Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
Plant & cell physiology
|August 29, 2025
まとめ
プラスティドF1FO-ATP合成酵素は,特に2つのガンマサブユニットイソフォームを持つアニオスペルマに特異的な酸化還元調節機能を備えている. この多様性は,光への適応を可能にし,非光合成組織におけるストレス耐性をサポートする.
科学分野:
- 生物化学
- 分子生物学
- 進化生物学
背景:
- F1FO-ATP合成は,細菌,ミトコンドリア,プラスチドで保存される細胞のエネルギー代謝に不可欠です.
- この酵素複合体は,構造,同型,および触媒メカニズムにおいて有意な調節的多様性を示しています.
- プラスティドF1FO-ATP合成は,光利用に結びついた酸化還元依存変調のようなユニークな特徴を持っています.
研究 の 目的:
- プラスティドF1FO-ATP合成の構造的,生理的,進化的側面をレビューする.
- ATP合成の多様化,特にプラスチドで,ATP生産を超えて調査する.
- クロロプラストのATP合成における酸化還元調節の必要性について議論する.
主な方法:
- ガンマ (γ) サブユニットの遺伝子解析
- 構造と生理学的データの統合
- 進化の比較分析について
主要な成果:
- 血管新生菌には2つのガンマ亜単位イソフォーム (ATPC1とATPC2) があり,酸化還元反応に敏感な酵素と不敏感な酵素を生成する.
- 暗闇で活性化して 陽子の運動力を調節します
- プラスチドATP合成の多様化は,より広範な生理学的役割とストレス適応をサポートします.
結論:
- プラスティドF1FO-ATP合成酵素のユニークな規制多様性は,その生理学的意義の鍵です.
- レドックス調節はクロロプラストのATP合成機能に不可欠であり,環境のシグナルに適応します.
- ATP合成の多様化は生物の適応と生存に寄与する.
関連する概念動画
ATP Synthase: Structure
13.0K
ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
13.0K
The Anatomy of Chloroplasts
5.6K
Green algae and plants, including green stems and unripe fruit, harbor specialized organelles called chloroplasts to carry out photosynthesis. They coordinate both stages of photosynthesis — the light-dependent reactions and the light-independent reactions. The light-dependent reactions use sunlight to release oxygen and produce chemical energy in the form of ATP and NADPH, and the light-independent reactions capture CO2 and use ATP and NADPH to produce sugar.
Structure of...
Structure of...
5.6K
Protein Complexes with Interchangeable Parts
2.6K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.6K
Protein Transport to the Outer Chloroplast Membrane
2.0K
Chloroplast outer membrane proteins encoded by the nucleus are synthesized in the cytosol. Soon after synthesis, they bind cytosolic factors such as 14-3-3 protein and the Hsp70 chaperones that keep these precursors in an unfolded state until their translocation.
Two models describe the mechanism of precursor recognition and entry across the outer membrane through the TOC complex. Model 1 suggests the newly synthesized precursor binds to the TOC receptor 159 and forms a complex.
Two models describe the mechanism of precursor recognition and entry across the outer membrane through the TOC complex. Model 1 suggests the newly synthesized precursor binds to the TOC receptor 159 and forms a complex.
2.0K
ATP Synthase: Mechanism
15.1K
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
15.1K
Export of Mitochondrial and Chloroplast Genes
3.8K
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
3.8K

