RNF/NQR氧化还原:一种用于细菌和古生物中的能量转导的多功能系统
Wolfgang Buckel1, Ulrich Ermler2, Janet Vonck3
1Faculty of Biology, Philipps-Universität Marburg, Karl-von-Frisch-Straße 8, 35043, Marburg, Germany.
Applied microbiology and biotechnology
|June 17, 2025
概括
罗多巴克特的固化 (RNF) 复合体和NADH:氨酸氧化还原酶 (NQR) 是重要的细菌氧化还原酶. 它们的共享机制涉及能量转换的构造性合,使它们成为潜在的抗生素标.
科学领域:
- 生物化学 生物化学
- 微生物学 微生物学
- 结构生物学 结构生物学
背景情况:
- 纳+转位铁素:NAD+氧化还原酶 (RNF) 和NADH:氨酸氧化还原酶 (NQR) 是关键的膜结合酶复合体.
- 在各种细菌中,RNF对于无氧代谢至关重要,而NQR则是从RNF进化而来的,并且存在于各种细菌群体中.
- 无论是RNF还是NQR都与真核生物呼吸综合体I无关,这凸显了它们独特的生物作用.
研究的目的:
- 为了比较RNF和NQR氧化还原的假定反应机制.
- 研究RNF和NQR复合物的共享功能模块在氧化还原驱动的阴离子运输中.
- 探索RNF和NQR作为新型抗生素点的潜力.
主要方法:
- 对RNF和NQR结构和功能的比较分析.
- 对RNF和NQR最近的3D结构数据的审查.
- 检查电子转移和阴离子转移机制.
主要成果:
- RNF和NQR共享一个核心复合体,由四个子单元组成,对阴离子运输至关重要.
- 最近的结构研究揭示了RNF/NQR中电子转移和Na+转位之间的结构合.
- 基于构造性合的能量转换的共同原理是为两个酶系统提出的.
结论:
- RNF和NQR代表了一种独特的氧化还原驱动质子/家族.
- 构造性合机制是RNF和NQR功能的核心.
- RNF和NQR是开发新抗生素的有希望的目标.
更多相关视频
12:22Ratiometric Biosensors that Measure Mitochondrial Redox State and ATP in Living Yeast Cells
Published on: July 22, 2013
21.2K
05:06Author Spotlight: Advancing Antibiotic Resistance Research Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System
Published on: January 5, 2024
748
相关概念视频
Redox Reactions
221
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...
221
Electron Transport Chain Components
238
The electron transport chain (ETC) is a crucial metabolic pathway that facilitates energy conversion in prokaryotic and eukaryotic cells. In eukaryotes, the ETC comprises four membrane-associated protein complexes in the inner mitochondrial membrane. In prokaryotes, the ETC in the plasma membrane can vary in composition, with fewer or different complexes depending on the organism and environmental conditions. These complexes transfer electrons from electron donors, such as NADH and FADH2, to...
238
Anoxygenic Photosynthesis
180
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
180
Role of Reduced Coenzymes NADH and FADH₂
12.7K
The energy released from the breakdown of the chemical bonds within nutrients can be stored either through the reduction of electron carriers or in the bonds of adenosine triphosphate (ATP). In living systems, a small class of compounds functions as mobile electron carriers, molecules that bind to and shuttle high-energy electrons between compounds in pathways. The principal electron carriers that will be considered originate from the B vitamin group and are derivatives of nucleotides; they are...
12.7K
Metabolism of Chemolithotrophs
192
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
192
Oxidation and Reduction of Organic Molecules
7.8K
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...
7.8K
