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Related Concept Videos

Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
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Other Stress Responses in Bacteria01:30

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Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
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The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
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Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Related Experiment Video

Updated: Apr 1, 2026

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions
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The Cold Shock Response.

Sangita Phadtare, Masayori Inouye

    Ecosal Plus
    |October 8, 2015
    PubMed
    Summary

    The cold shock response in Escherichia coli involves temperature downshift affecting cellular processes. Cold shock proteins, like CspA, and sugars are crucial for bacterial survival and growth under cold conditions.

    Area of Science:

    • Microbiology
    • Molecular Biology
    • Biochemistry

    Background:

    • Temperature changes are common environmental stresses impacting cellular functions.
    • Cold shock affects membrane fluidity, RNA/DNA structures, protein folding, and translation.
    • Escherichia coli exhibits a complex cold shock response involving specific proteins and metabolic adjustments.

    Purpose of the Study:

    • To review the cold shock response in Escherichia coli.
    • To highlight the roles of cold shock proteins and sugars in cellular adaptation.
    • To discuss the implications of studying bacterial cold shock.

    Main Methods:

    • Literature review of studies on bacterial cold shock response.
    • Analysis of the effects of temperature downshift on cellular components.

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  • Examination of the role of CspA and sugars in cold adaptation.

    • Main Results:

    • Cold shock induces significant changes in membrane fluidity, nucleic acid structures, protein folding, and translation efficiency.
    • CspA is identified as a major cold shock protein in E. coli, with homologs across diverse bacteria.
    • Transient stabilization of cspA mRNA is key to its cold shock induction.
    • Sugars provide protection to cells during cold shock.

    Conclusions:

    • The cold shock response is a conserved mechanism across bacteria, essential for survival and growth at low temperatures.
    • CspA and accumulated sugars are vital components of the cold shock response.
    • Understanding cold shock has broad implications for basic science, health, and industry.