同表达分析揭示了在热水风口共生体中围绕两个碳固定路径的明显结盟
Jessica H Mitchell1, Adam H Freedman2, Jennifer A Delaney2
1Harvard University, Cambridge, MA, USA. jessicamitchell@fas.harvard.edu.
Nature microbiology
|June 5, 2024
概括
水热通风管虫共生体使用两种碳固定路径,即卡尔文-本森-巴什姆 (CBB) 和还原三酸 (rTCA) 循环. 它们的协调活动可能是在动态深海环境中生存的关键.
科学领域:
- 海洋生物学 海洋生物学
- 生物化学 生化学
- 微生物生态学 微生物生态学
背景情况:
- 大多数自营动物都使用单一的碳固定路径.
- 水热通风管虫共生体 (Riftia pachyptila) 独特地拥有卡尔文-本森-巴什姆 (CBB) 和还原三酸 (rTCA) 循环.
- 这些双重路径之间的协调机制仍然没有被阐明.
研究的目的:
- 研究Riftia pachyptila内共生物中CBB和rTCA循环的协调.
- 确定环境地质化学如何影响这些路径.
- 确定双通道利用的潜在适应性优势.
主要方法:
- 在受控的环境条件下 (温度,地化学) 化Riftia pachyptila管.
- 净碳固定率的测量.
- 对转录和代谢反应的分析,包括共同表达模式.
主要成果:
- 对于rTCA和CBB循环的转录模式因地质化学模式而异.
- rTCA通路与化酶和酸盐降解相关;CBB通路与硫化物氧化和酸盐同化相关.
- 网络分析发现rTCA和1e组酶对于应对硫化物和氧气限制至关重要.
- 观察到高净碳固定率.
结论:
- 在Riftia pachyptila共生体中,CBB和rTCA通路表现出不同的但互补的代谢作用.
- 两种途径的协同活性被提议作为高碳固定率的适应.
- 这种双通道系统可以在波动的热水风口环境中赋予健身优势.
更多相关视频
11:16A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling
Published on: July 22, 2017
14.0K
09:01Author Spotlight: Separation of Coral Host Tissues and Algal Symbionts and Analyzing Their Metabolites
Published on: October 13, 2023
1.9K
相关概念视频
C4 Pathway and CAM
45.4K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
45.4K
The Calvin Benson Cycle
4.5K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.5K
Chemiosmosis
98.1K
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...
98.1K
The Sulfur Cycle
44.0K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
44.0K
The Calvin Cycle
73.9K
Overview
73.9K
The Carbon Cycle
37.2K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
37.2K
