The methyltransferase PR-Set7 catalyses the methylation of Histone H4 on Lys 20. This methylation mark is now found to correlate with replication-origin licensing. Expression of a non-degradable PR-Set7 mutant leads to retention of this mark and repeated DNA replication at origins.
- Mathieu Tardat
- Julien Brustel
- Eric Julien