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A lipid-managing program maintains a stout Spitzenkörper

Miguel A Peñalva1

  • 1Department of Cellular and Molecular Biology, Centro de Investigaciones Biológicas CSIC, Ramiro de Maeztu 9, Madrid, 28040, Spain.

Molecular Microbiology
|April 30, 2015
PubMed

Insights

The Spitzenkörper (SPK) in filamentous fungi is a key structure for intracellular traffic. Research reveals its stratified organization, suggesting it acts as a specialized sorting hub for cellular membranes.

Area of Science:

  • Cell Biology
  • Mycology
  • Biochemistry

Background:

  • The Spitzenkörper (SPK) is a dynamic organelle at the hyphal tip plasma membrane in filamentous fungi.
  • Its precise role in intracellular traffic and membrane organization remains incompletely understood.
  • The contribution of cellular membrane asymmetry to SPK function is an understudied area.

Purpose of the Study:

  • To investigate the structural organization of the Spitzenkörper in Aspergillus nidulans.
  • To explore the role of membrane asymmetry in organizing membrane traffic within fungal hyphae.
  • To provide molecular insights into the function of the SPK as a potential sorting hub.

Main Methods:

  • Cell biological analysis of fungal hyphal tips.
  • Microscopy techniques to visualize SPK structure.
  • Genetic manipulation of Aspergillus nidulans.

Main Results:

  • The Spitzenkörper in Aspergillus nidulans exhibits a stratified structure, similar to that observed in Neurospora crassa.
  • Evidence suggests the SPK is composed of functionally specialized exocytic carriers.
  • The SPK functions as a major sorting hub for intracellular membranes.

Conclusions:

  • The Spitzenkörper is a complex, stratified structure with specialized exocytic carriers.
  • It plays a crucial role as a sorting hub for intracellular membranes in fungal hyphae.
  • Further research into phospholipid composition can illuminate SPK organization and function.

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