Subcellular localization of acyl-CoA binding protein in Aspergillus oryzae is regulated by autophagy machinery

Kouhei Kawaguchi, Takashi Kikuma, Yujiro Higuchi, Kaoru Takegawa, Katsuhiko Kitamoto

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In eukaryotic cells, acyl-CoA binding protein (ACBP) is important for cellular activities, such as in lipid metabolism. In the industrially important fungus Aspergillus oryzae, the ACBP, known as AoACBP, has been biochemically characterized, but its physiological function is not known. In the present study, although we could not find any phenotype of AoACBP disruptants in the normal growth conditions, we examined the subcellular localization of AoACBP to understand its physiological function. Using an enhanced green fluorescent protein (EGFP)-tagged AoACBP construct we showed that AoACBP localized to punctate structures in the cytoplasm, some of which moved inside the cells in a microtubule-dependent manner. Further microscopic analyses showed that AoACBP-EGFP co-localized with the autophagy marker protein AoAtg8 tagged with red fluorescent protein (mDsRed). Expression of AoACBP-EGFP in disruptants of autophagy-related genes revealed aggregation of AoACBP-EGFP fluorescence in the cytoplasm of Aoatg1, Aoatg4 and Aoatg8 disruptant cells. However, in cells harboring disruption of Aoatg15, which encodes a lipase for autophagic body, puncta of AoACBP-EGFP fluorescence accumulated in vacuoles, indicating that AoACBP is transported to vacuoles via the autophagy machinery. Collectively, these results suggest the existence of a regulatory mechanism between AoACBP localization and autophagy.

Original languageEnglish
Pages (from-to)8-12
Number of pages5
JournalBiochemical and Biophysical Research Communications
Volume480
Issue number1
DOIs
Publication statusPublished - Nov 4 2016

Fingerprint

Diazepam Binding Inhibitor
Aspergillus oryzae
Aspergillus
Autophagy
Machinery
Vacuoles
Cytoplasm
Fluorescence
Eukaryotic Cells
Fungi
Lipase
Lipid Metabolism
Microtubules
Agglomeration
Genes
enhanced green fluorescent protein
Phenotype
Growth
Proteins

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Subcellular localization of acyl-CoA binding protein in Aspergillus oryzae is regulated by autophagy machinery. / Kawaguchi, Kouhei; Kikuma, Takashi; Higuchi, Yujiro; Takegawa, Kaoru; Kitamoto, Katsuhiko.

In: Biochemical and Biophysical Research Communications, Vol. 480, No. 1, 04.11.2016, p. 8-12.

Research output: Contribution to journalArticle

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