无氧烯生物降解与酸盐降解相结合,由一个Paracoccus versutus菌株PYRN-PV降解
Ziyu Lin1, Zuotao Zhang2, Yunhui Wang3
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, China.
Journal of environmental management
|November 16, 2025
概括
一种新的降酸盐细菌,菌株PYRN-PV,在厌氧条件下有效地生物降解 (99.6%在20天内) 和其他多环芳. 这项研究阐明了参与这一关键生物修复过程的关键代谢途径.
科学领域:
- 环境微生物学 环境微生物学
- 生物修复是一种生物修复.
- 聚环芳香碳化合物 (PAH) 的降解
背景情况:
- 通过降低酸盐的微生物对二烯的无氧生物降解是鲜为人知的.
- 识别特定的微生物物种及其代谢途径对于有效的生物修复至关重要.
研究的目的:
- 为了识别一种能够进行烯生物降解的酸盐降解细菌.
- 为了阐明涉及到被识别的菌株无氧烯降解的代谢途径.
- 评估该菌株降解其他PAHs的能力.
主要方法:
- 隔离和识别了一种新型酸盐降解细菌 (菌株PYRN-PV).
- 代谢物和同位素代谢物分析以确定降解途径.
- 基因组和RT-qPCR分析以支持途径阐明.
- 对烯和其他PAHs进行降解试验.
主要成果:
- 菌株PYRN-PV与Paracoccus versutus密切相关,在20天内降解了99.6%的烯,同时降低了酸盐.
- 通过氧化和甲基化确定了新型的烯激活,甲基化是新提出的机制.
- 已经阐明了中游 (CoA结合,化) 和下游 (环裂变,矿化) 路径.
- 菌株PYRN-PV证明了,纳夫他林,,,和[a]的高降解效率 (>99%).
结论:
- 菌株PYRN-PV是一种在降低酸盐条件下的无氧烯生物降解的高效剂.
- 该研究揭示了对无氧PAH降解的新型代谢见解.
- 这些发现为针对无氧环境中PAH污染物的生物修复策略提供了基础.
相关概念视频
Pyruvate Oxidation
168.2K
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+...
168.2K
Metabolism of Chemolithotrophs
741
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.
741
Environmental Applications of Microorganisms
918
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
918
Fates of Pyruvate
10.4K
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...
10.4K
Bioremediation
22.0K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
22.0K
Overview of Nitrogen Metabolism
10.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
10.9K


