Fun review article by our lab on how a viral KilA-N domain invaded the fungal ancestor, expanded through duplication, and became intimately associated with the fungal cell cycle, morphogenesis, and quiescence.
Medina EM, Walsh E, Buchler NE. Evolutionary innovation, fungal cell biology, and the lateral gene transfer of a viral KilA-N domain. Curr. Opin. Genet. Dev. 59: 103 (2019).