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Published on: November 9, 2020
Rab-GDI complex dissociation factor expressed through translational frameshifting in filamentous ascomycetes
Fabienne Malagnac1, Céline Fabret, Magali Prigent
1Univ Paris Sud, Institut de Génétique et Microbiologie, UMR8621, Orsay, France ; Univ Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (IED), Paris, France.
Abstract:
In the model fungus Podospora anserina, the PaYIP3 gene encoding the orthologue of the Saccharomyces cerevisiae YIP3 Rab-GDI complex dissociation factor expresses two polypeptides, one of which, the long form, is produced through a programmed translation frameshift. Inactivation of PaYIP3 results in slightly delayed growth associated with modification in repartition of fruiting body on the thallus, along with reduced ascospore production on wood. Long and short forms of PaYIP3 are expressed in the mycelium, while only the short form appears expressed in the maturing fruiting body (perithecium). The frameshift has been conserved over the evolution of the Pezizomycotina, lasting for over 400 million years, suggesting that it has an important role in the wild.
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