Abstract:
BACKGROUND:Initiation of eukaryotic DNA replication involves many protein-protein and protein-DNA interactions. We have previously shown that 14-3-3 proteins bind cruciform DNA and associate with mammalian and yeast replication origins in a cell cycle dependent manner. RESULTS:By expressing the human 14-3-3epsilon, as the sole member of 14-3-3 proteins family in Saccharomyces cerevisiae, we show that 14-3-3epsilon complements the S. cerevisiae Bmh1/Bmh2 double knockout, conserves its cruciform binding activity, and associates in vivo with the yeast replication origins ARS307. Deletion of the alpha5-helix, the potential cruciform binding domain of 14-3-3, decreased the cruciform binding activity of the protein as well as its association with the yeast replication origins ARS307 and ARS1. Furthermore, the mutant cells had a reduced ability to stably maintain plasmids bearing one or multiple origins. CONCLUSION:14-3-3, a cruciform DNA binding protein, associates with yeast origins of replication and functions as an initiator of DNA replication, presumably through binding to cruciform DNA forming at yeast replicators.
journal_name
BMC Mol Bioljournal_title
BMC molecular biologyauthors
Yahyaoui W,Callejo M,Price GB,Zannis-Hadjopoulos Mdoi
10.1186/1471-2199-8-27subject
Has Abstractpub_date
2007-04-12 00:00:00pages
27issn
1471-2199pii
1471-2199-8-27journal_volume
8pub_type
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