A phospho-switch is identified in the shelterin subunit TRF2 that regulates transient recruitment of the RTEL1 helicase to, and release from, telomeres, and provides a narrow window during which RTEL1 can unwind t-loops to facilitate telomere replication.
- Grzegorz Sarek
- Panagiotis Kotsantis
- Simon J. Boulton