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Article Addendum

Redrawing the borderline: Control of DNA replication at fertilization

Arnaud Ronceret and Martine Devic

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In our recent paper in Plant Journal, we described the transcriptional activation of AtTMPK (thymidylate kinase), a recognized G1/S phase marker of the cell cycle progression and its role in early seed development. Here, we compare our conclusions on the regulation of AtTMPK and those of other genes participating in DNA replication, including DPB2, a subunit of the DNA polymerase epsilon complex. Although, the dual localization of AtTMPK in the cytosol and mitochondria seems to be unique to plants, this phenomenon of multiple targeting is also used for other proteins involved in DNA replication, such as DNA ligase 1 (AtLIG1), and may represent a way to coordinate nuclear and organellar divisions.

Authors

Arnaud Ronceret

Plant Breeding and Genetics; Cornell University; Ithaca, New York USA

Martine Devic

Laboratoire Génome et Développement des Plantes; UMR-CNRS-IRD-Université 5096; Perpignan, France

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