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関連する概念動画

Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

9.7K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

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The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
3.2K
Electron Transport Chains01:28

Electron Transport Chains

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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
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Gene Families01:57

Gene Families

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Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
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Pyruvate Oxidation01:15

Pyruvate Oxidation

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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+...
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関連する実験動画

Updated: Apr 5, 2026

Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
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Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides

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4ヘリクスの束は,メタンの酸化のために銅を貯蔵する.

Nicolas Vita1, Semeli Platsaki1, Arnaud Baslé1

  • 1Institute for Cell and Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK.

Nature
|August 27, 2015
PubMed
まとめ
この要約は機械生成です。

研究者らは,メタン酸化細菌で新しい銅貯蔵タンパク質 (Csp1) を発見した. このタンパク質は 温室効果ガスの制御と バイオテクノロジーの応用に不可欠なメタン酸化に必要な 銅の貯蔵に不可欠です

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Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
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Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

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Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
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関連する実験動画

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Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
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科学分野:

  • 生物化学
  • 微生物学
  • 環境科学

背景:

  • メタンを酸化する細菌 (メタノトロフ) は,メタン酸化のために銅に依存するメタンモノオキシゲナスを利用する.
  • メタン単酸化酵素は 大気中のメタンを 調節する上で重要な役割を果たします
  • メタノトロフはバイオリメディエーション,化学合成,バイオエネルギーにおいて重要な可能性を秘めています.

研究 の 目的:

  • *メチロシヌス・トリコスポリウム* OB3b の新しい銅貯蔵タンパク質を発見し,特徴づけること.
  • メタノトロフにおけるメタン酸化のための銅貯蔵のメカニズムを解明する.
  • メタノトロフの銅貯蔵のバイオテクノロジーの影響を理解する.

主な方法:

  • 新型銅貯蔵タンパク質 (Csp1) の分離と特徴づけ
  • Csp1の四分構造と銅結合部位を含む構造分析
  • メタンモノオキシゲネーゼの活動におけるCsp1の役割の調査.

主要な成果:

  • *メチロシヌス・トリコスポリウム* OB3bで輸出された銅貯蔵タンパク質Csp1の発見
  • Csp1は,システイン残留を含むユニークな銅結合メカニズムを持つテトラマーです.
  • Csp1は,既知のタンパク質折り畳みモチーフの中で銅を貯蔵し,金属貯蔵タンパク質にとって新しい発見です.
  • 銅の使用に関する以前の仮定に異議を唱える様々な細菌における細胞性Csp1同類体の識別.

結論:

  • Csp1は,メタノトロフにおける粒子のメタンモノオキシゲナーゼの銅の蓄積に重要な役割を果たす.
  • Csp1のユニークな構造と機能は,バクテリアの銅代謝に関する重要な洞察を提供します.
  • Csp1の理解は,メタノトロフの完全なバイオテクノロジーの潜在能力を活用するために不可欠です.