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Related Experiment Videos

Folate metabolism in Streptococcus faecalis.

P G McElwee, J M Scott

    The Biochemical Journal
    |May 1, 1972
    PubMed
    Summary
    This summary is machine-generated.

    Streptococcus faecalis can uptake 5-methyltetrahydropteroylglutamate, but not pteroyltriglutamate, suggesting an active transport process for folate derivatives in this bacterium.

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    Area of Science:

    • Microbiology
    • Biochemistry

    Background:

    • Streptococcus faecalis is a bacterium with specific nutritional requirements.
    • Folate metabolism is crucial for bacterial growth and survival.
    • Understanding nutrient uptake mechanisms is key to bacterial physiology.

    Purpose of the Study:

    • To investigate the permeability of Streptococcus faecalis to specific folate derivatives.
    • To determine if the inability to utilize certain folate forms is due to cell membrane permeability.
    • To elucidate the transport mechanism of folate compounds in S. faecalis.

    Main Methods:

    • Culturing Streptococcus faecalis under specific growth conditions.
    • Assessing the uptake of 5-methyltetrahydropteroylglutamate and pteroyltriglutamate.
    • Measuring intracellular accumulation of folate derivatives.

    Related Experiment Videos

  • Investigating the effect of fluoride on folate uptake.

    • Main Results:

    • S. faecalis cells actively took up 5-methyltetrahydropteroylglutamate.
    • Pteroyltriglutamate was not taken up by the bacterial cells.
    • The uptake of 5-methyltetrahydropteroylglutamate occurred against a concentration gradient.
    • Fluoride significantly inhibited the accumulation of 5-methyltetrahydropteroylglutamate.

    Conclusions:

    • The inability of S. faecalis to utilize pteroyltriglutamate is likely due to a lack of a specific transport system.
    • 5-methyltetrahydropteroylglutamate uptake is an active, energy-dependent process.
    • These findings highlight specific folate transport mechanisms in Streptococcus faecalis.