Hyperthermophiles

Hyperthermophiles are microorganisms that grow optimally at temperatures of about 80°C or higher, making them important models for studying the limits of life and microbial adaptation. They maintain cellular function through heat-stable proteins, strengthened membrane structures, and DNA-protective systems that preserve essential biochemical reactions under extreme thermal stress. In biology, research on hyperthermophiles helps clarify microbial evolution, the early history of life, and the potential for life in hot environments beyond Earth. Their thermostable enzymes also support biotechnology applications, including high-temperature molecular biology, industrial biocatalysis, and nucleic acid amplification.

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JoVE Core - Microbiology

Hyperthermophilic Bacteria

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2025

Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their genes show strong...

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