関連する実験動画
Updated: Jul 16, 2026

11:05
Analysis of Oxidative Stress in Zebrafish Embryos
Published on: July 7, 2014
アスカリス・ヘモグロビンは,酸化窒素で活性化された"デオキシゲナーゼ"です
D M Minning1, A J Gow, J Bonaventura
1Howard Hughes Medical Institute, Department of Molecular Microbiology, Washington University School of Medicine, St Louis, Missouri 63110, USA.
Nature
|October 16, 1999
まとめ
アスカリスのヘモグロビンは,酸素を消費するために酸化窒素を使用し,低毒環境を維持します. 独特のヘム化学を伴うこの新しいデオキシゲネーゼ機能は,分子の進化と適応を説明します.
科学分野:
- バイオケミストリー バイオケミストリー
- 寄生虫学とは,寄生虫学である.
- 分子進化は分子進化である
背景:
- アスカリス・ルンブリコイドス (Ascaris lumbricoides) は,世界中で10億人に感染しています.
- そのヘモグロビンは,非常に高い酸素結合親和性を示しています.
- アスカリス・ヘモグロビンの生物学的役割は不明のままである.
研究 の 目的:
- アスカリス・ヘモグロビンの難解な生物学的機能を解明する.
- アスカリスのヘモグロビンの活動における酸化窒素の役割を調査する.
- ヘモグロビンのディスタルポケット内のユニークな化学反応を理解するために.
主な方法:
- アスカリスのヘモグロビン,酸素,窒素酸化物の反応を調査した.
- 酸素の酵素消費を分析した.
- ヘム,チオール,酸化窒素を含む新しい化学メカニズムを特徴づけた.
主要な成果:
- アスカリスのヘモグロビンは,酸化窒素によって引き起こされる反応である酸素を酵素的に消費します.
- このプロセスは,周腸液に低毒性環境を維持します.
- 前例のないヘムグループ,チオール,酸化窒素の化学反応が観察されました.
結論:
- アスカリスのヘモグロビンは脱酸素酵素として機能し,酸化窒素を介して酸素を排毒します.
- 分子の構造的および機能的適応は,酸化窒素に関連する機能と関連しています.
- 窒素酸化物の相互作用が,アスカリス・ヘモグロビンの分子進化を促した可能性が高い.
関連する概念動画
Redox Reactions
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Oxidation-Reduction Reactions
Oxidation–Reduction Reactions
Oxidation and Reduction of Organic Molecules
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
Radical Autoxidation
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
Hemoglobin
Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well.
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
Redox Reactions
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...

