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Related Experiment Videos

Lipoxygenase activity during parabolic flights.

M Maccarrone1, M Tacconi, N Battista

  • 1Department of Experimental Medicine and Biochemical Sciences and Biomedical Space Center, University of Rome Tor Vergata, Rome, Italy.

Journal of Gravitational Physiology : a Journal of the International Society for Gravitational Physiology
|March 26, 2003
PubMed
Summary

Microgravity may alter cellular processes. This study investigated soybean lipoxygenase-1 (LOX-1) enzyme activity under simulated weightlessness, finding no significant effect on its dioxygenation reaction.

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Area of Science:

  • Biochemistry
  • Space Biology
  • Enzymology

Background:

  • Spaceflight alters cellular functions, including growth and gene expression, with unknown molecular mechanisms.
  • Microtubule self-organization's gravity dependence suggests molecular-level investigations are crucial for understanding space effects.
  • Lipoxygenases (LOX) are enzymes involved in various biological processes and diseases, including inflammation and plant stress responses.

Purpose of the Study:

  • To investigate the effect of microgravity on the catalytic activity of soybean lipoxygenase-1 (LOX-1).
  • To determine if the dioxygenation reaction catalyzed by LOX-1 is influenced by altered gravitational conditions.

Main Methods:

  • Utilized the Effect of Microgravity on Enzymatic Catalysis (EMEC) module, a custom fiber optics spectrometer.

Related Experiment Videos

  • Measured the dioxygenation reaction of pure soybean LOX-1 during the European Space Agency's 28th parabolic flight campaign.
  • Simulated microgravity conditions to assess enzyme catalysis.

    • Main Results:

    • The dioxygenation reaction catalyzed by soybean lipoxygenase-1 (LOX-1) showed no significant alteration under simulated microgravity conditions.
    • Enzyme activity remained consistent despite the changes in gravitational force during parabolic flights.

    Conclusions:

    • Microgravity does not appear to significantly affect the catalytic activity of soybean lipoxygenase-1.
    • Further research is needed to understand the molecular basis of how spaceflight impacts other enzymes and cellular processes.