The replication kinase Cdc7-Dbf4 promotes the interaction of the p150 subunit of chromatin assembly factor 1 with proliferating cell nuclear antigen.

ABSTRACT: The coordination of chromatin assembly with DNA replication, which is essential for genomic stability, requires the combined activation of histone deposition with the firing of replication origins. We report here the direct interaction of chromatin assembly factor 1 (CAF1), a key factor involved in histone deposition, with the replication kinase Cdc7-Dbf4. We isolated a complex containing both the largest subunit of CAF1 (p150) and the Cdc7-Dbf4 kinase specifically in S phase and thus prove the existence of this interaction in vivo. We then show that the Cdc7-Dbf4 kinase efficiently phosphorylates p150. This event induces a change in p150 oligomerization state, which promotes binding to proliferating cell nuclear antigen (PCNA). Conversely, CAF1 recruitment is reduced in a PCNA/DNA loading

SUBMITTER: Gerard A 

PROVIDER: S-EPMC1525143 | biostudies-literature | 2006 Aug

REPOSITORIES: biostudies-literature