The enzymes Sae2 and Sgs1 regulate telomere maintenance in yeast cells that are telomerase-positive or -negative, but how they do this is unclear. Here the authors show that Sae2 and Sgs1 facilitate telomere replication in telomerase-positive cells, but generate single-stranded DNA at eroded telomeres in telomerase-negative cells.
- Julien Hardy
- Dmitri Churikov
- Marie-Noëlle Simon