Table 5.
Examples of proven or proposed positive biological roles for amyloids and amyloid-like oligomers
| Protein(s) | Organism(s) | Biological role in polymeric form | Amyloid type |
|---|---|---|---|
| Het-s | Fungus Podospora | Vegetative incompatibility | Switchable |
| Mot3 | Yeast | Multicellularity, ethanol resistance | Switchable |
| Lsb2 | Yeast | Stress memory | Switchable |
| Adhesins | Fungi | Substrate attachment, biofilm | Inducible |
| CsgA,B (curli) | Bacteria | Substrate attachment, biofilm | Inducible |
| Peptide hormones | Mammals | Storage | Reversible |
| Pmel17 | Animals | Melanin synthesis | Reversible |
| CPEB (Orb) | Shellfish, flies, mice | Long term memory | Switchable |
| Silk/fibroin | Spiders, insects | Structure formation | Constitutive |