Current Genetics

, Volume 56, Issue 3, pp 225–235 | Cite as

Deletion of PaAif2 and PaAmid2, two genes encoding mitochondrial AIF-like oxidoreductases of Podospora anserina, leads to increased stress tolerance and lifespan extension

  • Diana Brust
  • Andrea Hamann
  • Heinz D. OsiewaczEmail author
Research Article


Wild-type strains of the ascomycete Podospora anserina are characterized by a limited lifespan. Mitochondria play a central role in this ageing process raising the question of whether apoptosis-like processes, which are also connected to mitochondrial function, are involved in the control of the final stage in the fungal life cycle. While a role of two metacaspases in apoptosis and lifespan control was recently demonstrated in P. anserina, virtually nothing is known about the function of the protein family of apoptosis-inducing factors (AIFs). Here we report data about proteins belonging to this family. We demonstrate that the cytosolic members PaAIF1 and PaAMID1 do not affect lifespan. In contrast, loss of PaAIF2 and PaAMID2, which both were localized to mitochondria, are characterized by a significantly increased ROS tolerance and a prolonged lifespan. In addition, deletion of PaAmid2 severely affects sporogenesis. These data identify components of a caspase-independent molecular pathway to be involved in developmental processes and in the induction of programmed cell death in the senescent stage of P. anserina.


Podospora anserina AIF Mitochondria Ageing Programmed cell death 



The research was supported by grants of the Deutsche Forschungsgemeinschaft (Os75/12–1), and by the European Commission via the Integrated Project with the acronym MiMage (LSHM-CT-2004-512020). Furthermore, we thank Prof. R. Lill (Philipps University Marburg, Germany) for providing the antibody against cytochrome c.

Supplementary material

294_2010_295_MOESM1_ESM.pdf (143 kb)
Supplementary material 1 (PDF 143 kb)


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Diana Brust
    • 1
  • Andrea Hamann
    • 1
  • Heinz D. Osiewacz
    • 1
    Email author
  1. 1.Cluster of Excellence Macromolecular Complexes, Faculty for Biosciences, Institute of Molecular BiosciencesJohann Wolfgang Goethe UniversityFrankfurtGermany

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