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Related Experiment Videos

Hydrostatic pressure-induced changes in cellular protein synthesis.

Mikko J Lammi1, Mika A Elo, Reijo K Sironen

  • 1Department of Anatomy, University of Kuopio, Kuopio, Finland. mikko.lammi@uku.fi

Biorheology
|August 10, 2004
PubMed
Summary
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High hydrostatic pressure inhibits protein synthesis. Eukaryotic elongation factor-2 (eEF-2) synthesis decreases under pressure, suggesting its role in cellular responses to stress.

Area of Science:

  • Cellular biology
  • Biochemistry
  • Molecular biology

Background:

  • Hydrostatic pressure is a known factor influencing cellular protein synthesis.
  • High continuous hydrostatic pressure generally inhibits protein synthesis.
  • The 30S ribosomal subunit's role in pressure effects on prokaryotic protein synthesis is known but not fully understood.

Purpose of the Study:

  • To investigate the specific mechanisms by which hydrostatic pressure affects protein synthesis in eukaryotic cells.
  • To identify potential pressure-regulated proteins in eukaryotic cells.
  • To explore the role of eukaryotic elongation factor-2 (eEF-2) under hydrostatic pressure.

Main Methods:

  • Exposure of eukaryotic cells to 30 MPa continuous hydrostatic pressure.

Related Experiment Videos

  • Analysis of protein synthesis, specifically focusing on eukaryotic elongation factor-2 (eEF-2).
  • Detection of heat shock proteins (HSP70 and HSP90 beta) under pressure.

    • Main Results:

    • Synthesis of eukaryotic elongation factor-2 (eEF-2) was observed to decrease under 30 MPa hydrostatic pressure.
    • Specific pressure-sensitive proteins were identified, indicating targeted cellular responses.
    • Accumulation of heat shock protein 70 and 90 beta was noted under high pressure, albeit weaker than under heat stress.

    Conclusions:

    • Eukaryotic elongation factor-2 (eEF-2) may play a role in the synthesis of pressure-regulated proteins in eukaryotic cells.
    • Hydrostatic pressure can elicit specific protein synthesis responses in stressed cells.
    • While general protein synthesis is inhibited, specific proteins like heat shock proteins show altered accumulation patterns under pressure.