Table:
text: Fungal prion
List of characterized prions
List of characterized prions
Protein Natural_Host Normal_Function Prion_State Prion_Phenotype Year_Identified_
Ure2p Saccharomyces cerevisiae Nitrogen catabolite repressor [URE3] Growth on poor nitrogen sources 1994
Sup35p Saccharomyces cerevisiae Translation termination factor [PSI+] Increased levels of nonsense suppression 1994
HET-S Podospora anserina Regulates heterokaryon incompatibility [Het-s] Heterokaryon formation between incompatible strains 1997
vacuolar protease B Saccharomyces cerevisiae death in stationary phase, failure in meiosis [β] failure to degrade cellular proteins under N starvation 2003
MAP kinases Podospora anserina increased pigment, slow growth [C]  2006
Rnq1p Saccharomyces cerevisiae Protein template factor [RNQ+],[PIN+] Promotes aggregation of other prions 2008
Mca1* Saccharomyces cerevisiae Putative Yeast Caspase [MCA+] Unknown 2008

Question: How do any proteins have Podospora anserina as a natural host among fungal prions?