メタノール転送は,バクテリアと古生物間の代謝シントロフィーをサポートする
Yan Huang1,2,3, Kensuke Igarashi3, Laiyan Liu1
1Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, China.
Nature
|January 29, 2025
まとめ
科学者は微生物がホルマットをメタノールに変換する 新しい代謝を発見し 地表の生態系におけるメチル化化合物の起源を説明しました このプロセスと 共生的な関係により 生物は エネルギーが限られた環境で 繁栄することができます
科学分野:
- 微生物学
- 地化学
- 生地化学のサイクル
背景:
- メチロトロフィックメタノゲンは地表の生態系に豊富に存在し,メチル化化合物の重要性を示している.
- これらのメチル化化合物の起源は不明であり,新しい合成経路は知られていない.
研究 の 目的:
- 地下環境でメチル化化合物の新たな生成に 責任を負う代謝経路を特定する.
- この新しい代謝の生態学的影響と炭素循環におけるその役割を調査する.
主な方法:
- 熱愛性アナエロブZhaonella formicivoransを代謝分析に使用した.
- Z. formicivoransとそのメチロトロフィックパートナーであるMethermicoccus shengliensisで栽培実験を行った.
主要な成果:
- 甲酸塩をメチル化前駆体なしでメタノールに変換する新しいエネルギー代謝をZ. formicivoransで特定した.
- メタノールの蓄積がホルマート駆動メタノゲーゼスを阻害することを示したが,これは共生的なメタノールの消費によって克服される.
- 熱力学的必要性によって導かれる第4のシントロフィー様式は,ホルマートからメタノールへの変換と,その後の消費を含む.
結論:
- 新しい代謝とシントロフィーは,地下メタノゲン系生態系におけるメチル化化合物の存在を説明する.
- この代謝共生により,生物はエネルギー不足の環境で熱力学的制限の下で生存し,繁栄することができます.
さらに関連する動画
関連する概念動画
01:20Fates of Pyruvate
8.3K
Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
8.3K
01:32Chemiosmosis
96.9K
Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
96.9K
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
32.1K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
32.1K
01:15Pyruvate Oxidation
158.2K
After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
158.2K
01:29Fermentation
113.2K
Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
113.2K