Aquifex Bacterium
Aquifex Bacterium - Related Videos
02:14
Thermal Lysis-Based Genomic DNA Extraction from a Pathogenic Bacterium
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2025
Source: Gulla, S., et al. Multi-locus Variable-number Tandem-repeat Analysis of the Fish-pathogenic Bacterium Yersinia ruckeri by Multiplex PCR and Capillary Electrophoresis. J. Vis. Exp. (2019).This protocol extracts genomic DNA from Yersinia ruckeri by suspending isolated colonies in ultrapure water and applying heat to lyse the cells. Centrifugation separates the DNA-containing supernatant from cell debris, yielding template DNA suitable for PCR-based genotyping and epidemiological analysis.
02:48
Culturing the Rapidly Growing Bacterium Vibrio natriegens
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2025
Source: Wiegand, D. J., Lee, et al., Cell-free Protein Expression Using the Rapidly Growing Bacterium Vibrio natriegens. J. Vis. Exp. (2019)This video demonstrates the cultivation and harvesting of Vibrio natriegens, a fast-growing bacterium, under aerated conditions to prepare bacterial pellets for crude extract generation.
03:13
Generating Protoplasts from the Gram-Positive Bacterium Bacillus megaterium
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2025
Source: Figueroa, D. M., et al. Production and Visualization of Bacterial Spheroplasts and Protoplasts to Characterize Antimicrobial Peptide Localization. J. Vis. Exp. (2018)This video demonstrates a step-by-step procedure for generating protoplasts from the Gram-positive bacterium Bacillus megaterium.
02:30
Assessing Root Colonization of Tomato Seedlings by a Pathogenic Bacterium Using Viable Cell Counts
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2026
Source: Matthysse, A. G. Adherence of Bacteria to Plant Surfaces Measured in the Laboratory. J. Vis. Exp., (2018)This video demonstrates a protocol for measuring root colonization of tomato seedlings by wild-type and cellulose-deficient pathogenic bacteria. Viable counts of tightly adhering bacteria show greater adhesion and microcolony formation by the wild-type strain, highlighting cellulose’s role in stable root colonization.
08:52
Cell-free Protein Expression Using the Rapidly Growing Bacterium Vibrio natriegens
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Cited by 28 •
2019
Cell-free expression systems are powerful and cost-efficient tools for the high-throughput synthesis and screening of important proteins. Here, we describe the preparation of cell-free protein expression system using Vibrio natriegens for the rapid protein production using plasmid DNA, linear DNA, and mRNA template.
FAQs
Aquifex bacteria support growth by oxidizing hydrogen or other inorganic compounds, transferring the resulting electrons to available acceptors during respiration. Sulfur compounds or oxygen can serve as electron acceptors, allowing these organisms to conserve energy under the unusual chemical conditions of hot springs and submarine hydrothermal systems. This metabolism links geothermal chemistry to microbial growth.
The available inorganic electron donor and terminal acceptor determine how Aquifex bacteria generate energy. Hydrogen oxidation supplies electrons, while sulfur compounds or oxygen can receive them during respiration. Because these organisms inhabit oxygen-limited geothermal settings, flexibility in electron acceptance helps connect their metabolism to local chemical gradients and supports primary production where light-driven processes are not central.
Carbon dioxide fixation supplies the carbon required to build cellular material while the bacteria obtain energy from inorganic chemical reactions. This combination of chemical energy acquisition and carbon incorporation allows Aquifex populations to function as primary producers in geothermal ecosystems. Their metabolism therefore connects abiotic compounds in hot environments with the formation of biological biomass.
Their ability to grow in extremely hot, oxygen-limited environments makes Aquifex bacteria useful models for examining the environmental limits of life. Their distinctive metabolic pathways also contribute to studies of bacterial phylogeny, the evolutionary relationships among bacteria. Together, these features help researchers investigate how ancient or environmentally extreme conditions may have shaped microbial evolution.
Researchers would investigate terrestrial hot springs and submarine hydrothermal systems, where high temperatures and chemically reduced conditions match the organisms' reported ecological range. Sampling these settings can help relate Aquifex occurrence to hydrogen, sulfur compounds, oxygen availability, and carbon dioxide-based primary production. The comparison also connects microbiology with environmental studies of geothermal ecosystems.
Aquifex bacteria produce heat-stable enzymes, meaning their enzymes retain functional relevance under high-temperature conditions. These properties make them valuable subjects for biotechnology investigations, especially when researchers seek biological catalysts suited to heat-intensive processes. Studying the enzymes alongside the organisms' unusual physiology can reveal how molecular function is maintained in extreme thermal environments.
By fixing carbon dioxide and using inorganic compounds for energy, Aquifex bacteria contribute to primary production in geothermal ecosystems. Their activity provides a biological route for converting geochemical resources into biomass in hot springs and hydrothermal systems. Consequently, they offer a model for examining how microbial metabolism influences nutrient and energy flow in environments with severe physical constraints.