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Updated: Jul 31, 2026

Organelle Transport in Cultured Drosophila Cells: S2 Cell Line and Primary Neurons.
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Organelle Transport in Cultured Drosophila Cells: S2 Cell Line and Primary Neurons.

Published on: November 21, 2013

Drosophila Amphiphysin is implicated in protein localization and membrane morphogenesis but not in synaptic vesicle

A C Zelhof1, H Bao, R W Hardy

  • 1Institute of Neuroscience, HHMI, University of Oregon 1254, Eugene, OR 97403, USA.

Development (Cambridge, England)
|December 19, 2001
PubMed

Insights

Drosophila Amphiphysin organizes specialized membrane domains. Despite lacking endocytic roles, its absence causes synaptic and behavioral defects, suggesting redundant functions in cell organization.

Area of Science:

  • Cell Biology
  • Neuroscience
  • Genetics

Background:

  • Amphiphysins are involved in synaptic vesicle endocytosis and actin organization.
  • One isoform is an autoantigen in neurological autoimmune disorders.
  • Genetic analysis of Amphiphysin function in higher eukaryotes is lacking.

Purpose of the Study:

  • To genetically analyze Amphiphysin function in Drosophila.
  • To investigate Amphiphysin's role in cellular organization and synaptic function.

Main Methods:

  • Localization studies in various Drosophila cell types.
  • Generation and analysis of Amphiphysin-null mutant flies.
  • Misexpression studies in photoreceptor neurons.

Main Results:

  • Drosophila Amphiphysin localizes to actin-rich membrane domains, including photoreceptor rhabdomeres and neuromuscular junctions.
  • Amphiphysin-null flies are viable with no endocytic defects but exhibit altered postsynaptic protein localization, synaptic physiology, and behavior.
  • Misexpression causes significant morphological defects in photoreceptor neurons.

Conclusions:

  • Amphiphysin is crucial for organizing specialized membrane domains, particularly postsynaptic structures.
  • Its function appears redundant with other proteins, explaining the mild mutant phenotype.
  • Amphiphysin plays a role in synaptic organization and neuronal function beyond endocytosis.

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