A cytosolic phospholipase A2-like protein in the filamentous fungus Aspergillus oryzae localizes to the intramembrane space of the mitochondria

Kohei Takaya, Yujiro Higuchi, Katsuhiko Kitamoto, Manabu Arioka

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

In mammalian cells, cytosolic phospholipase A2 (cPLA 2) displays a variety of activities through the release of arachidonic acid in response to cellular stimuli. In this study, we characterize the putative cPLA2-like protein, AoPlaA, in the filamentous fungus Aspergillus oryzae. When AoPlaA-EGFP was expressed in A. oryzae, it localized to the tubular structures that was costained by the marker dye for the mitochondria. A biochemical fractionation experiment showed that AoPlaA was present in the mitochondria-enriched fraction. The presence of an N-terminal cleavable mitochondrial targeting signal in AoPlaA was demonstrated by N-terminal amino acid sequence analysis, and by showing that chimeric proteins consisting of N-terminal 65 or 50 amino acids of AoPlaA fused to enhanced green fluorescent protein (EGFP) localized to the mitochondria. Submitochondrial fractionation of AoPlaA expressed in Saccharomyces cerevisiae demonstrated that AoPlaA localizes to the intramembrane space of the mitochondria. Taken together, the results presented here demonstrate a novel, submitochondrial localization of the cPLA2-like protein in the filamentous fungi.

Original languageEnglish
Pages (from-to)201-209
Number of pages9
JournalFEMS microbiology letters
Volume301
Issue number2
DOIs
Publication statusPublished - Dec 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Molecular Biology
  • Genetics

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