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Related Experiment Videos

[Messenger proteins].

A Prochiantz1

  • 1CNRS UMR 8542 Ecole normale supérieure, 46, rue d'Ulm, 75230 Paris. prochian@wotan.ens.fr

Journal De La Societe De Biologie
|April 28, 2001
PubMed
Summary
This summary is machine-generated.

Many proteins enter cells and reach the cytoplasm or nucleus via a non-classical endocytosis pathway. This discovery reveals novel intercellular signaling and peptide vector development.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Context:

  • Classical endocytosis is a well-established cellular uptake mechanism.
  • Many proteins are known to be internalized by cells.
  • Protein secretion typically requires a signal peptide.

Purpose:

  • To describe a non-classical protein internalization pathway.
  • To highlight the secretion of proteins lacking signal peptides.
  • To explore the implications of this novel signaling mechanism.

Summary:

  • Cells internalize certain proteins through a pathway distinct from classical endocytosis, granting them direct access to the cytoplasm and nucleus.
  • These internalized proteins are often secreted despite lacking a signal peptide, indicating an unconventional mechanism.

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  • This process represents a unique form of intercellular signaling.

    • Impact:

    • Challenges existing models of protein trafficking and secretion.
    • Opens new avenues for understanding developmental phenomena and physiological processes.
    • Led to the development of peptide-based vectors for cellular delivery.