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Related Experiment Videos

Protein fatty acid acylation in developing cortical neurons.

N I Perrone-Bizzozero1, L I Benowitz, P J Apostolides

  • 1Department of Psychiatry, Harvard Medical School, Cambridge, Massachusetts.

Journal of Neurochemistry
|April 1, 1989
PubMed
Summary

Fatty acids are incorporated into specific neuronal proteins, primarily membrane-bound ones in growth cones. This acylation may regulate protein function or localization in nerve terminals.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Neuronal development involves complex protein modifications.
  • Fatty acid acylation is a known post-translational modification.
  • Growth cones are critical for neuronal development and synapse formation.

Purpose of the Study:

  • To investigate the incorporation of fatty acids into neuronal proteins.
  • To identify and characterize the major acylated proteins in neurons.
  • To determine the function and localization of these acylated proteins.

Main Methods:

  • Primary neuronal cultures from embryonic day 17 rat cerebral cortex.
  • Incubation with radiolabeled myristic or palmitic acid.
  • Two-dimensional gel electrophoresis and fluorography for protein analysis.

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Main Results:

  • Extensive fatty acid incorporation into specific neuronal proteins.
  • Identified four major acylated proteins with distinct molecular weights and isoelectric points.
  • Major acylated proteins are membrane-bound and enriched in growth cones.
  • The 87-kDa and 45-kDa proteins correspond to known growth cone phosphoproteins (pp80 and pp40).
  • Myristic acid is attached via an ester linkage.

Conclusions:

  • Fatty acid acylation targets specific proteins in neurons.
  • Acylated proteins are localized to growth cones and neuronal membranes.
  • Acylation may regulate protein function or membrane targeting in nerve terminals.