Cited by 163Fungal and yeast genetics researchCellular transport and secretionMicrotubule and mitosis dynamics

Apical Sterol-rich Membranes Are Essential for Localizing Cell End Markers That Determine Growth Directionality in the Filamentous Fungus Aspergillus nidulans

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Takeshita, Norio, Higashitsuji, Yuhei, Konzack, Sven, Fischer, Reinhard·2008·Molecular Biology of the Cell

Abstract

In filamentous fungi, hyphal extension depends on the continuous delivery of vesicles to the growing tip. Here, we describe the identification of two cell end marker proteins, TeaA and TeaR, in Aspergillus nidulans, corresponding to Tea1 and Mod5 in Schizosaccharomyces pombe. Deletion of teaA or teaR caused zig-zag-growing and meandering hyphae, respectively. The Kelch-repeat protein TeaA, the putatively prenylated TeaR protein, and the formin SepA were highly concentrated in the Spitzenkörper, a vesicle transit station at the tip, and localized along the tip membrane. TeaA localization at tips depended on microtubules, and TeaA was required for microtuble convergence in the hyphal apex. The CENP-E family kinesin KipA was necessary for proper localization of TeaA and TeaR, but not for their transportation. TeaA and TeaR localization were interdependent. TeaA interacted in vivo with TeaR, and TeaA colocalized with SepA. Sterol-rich membrane domains localized at the tip in teaA and teaR mutants like in wild type, and filipin treatment caused mislocalization of both proteins. This suggests that sterol-rich membrane domains determine cell end factor destinations and thereby polarized growth.

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Authors
Takeshita, N., Higashitsuji, Y., Konzack, S., & Fischer, R.
Affiliations
  • Karlsruhe Institute of Technology (DE)
  • Applied Microbiology, University of Karlsruhe, D-76187 Karlsruhe, Germany
Venue
Molecular Biology of the Cell
Published
2008-01
Volume
19
Issue
1
Pages
339-351
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2137246929
Cited by
163
References
58
Citations by year
2026: 9 · 2025: 6 · 2024: 8 · 2023: 4 · 2022: 2 · 2021: 5 · 2020: 5 · 2019: 12 · 2018: 6 · 2017: 13 · 2016: 12 · 2015: 14 · 2014: 13 · 2013: 6 · 2012: 4
FWCI
3.84
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
Keywords
Aspergillus nidulans, hyphal tip, polarized growth, tear, Spitzenkörper, vesicle trafficking, filipin, hyphal morphology
MeSH terms
Aspergillus nidulans, Cell Membrane, Filipin, Fungal Proteins, Microtubules, Phenotype, Protein Binding, Sterols, Biomarkers, Cell Polarity, Gene Deletion, Protein Transport, Hyphae

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