Regulating post-translational modifications of the eukaryotic replication clamp PCNA.
Modifications of the eukaryotic sliding clamp, proliferating cell nuclear antigen (PCNA), by ubiquitin and the ubiquitin-related protein SUMO, are well known to influence the choice of pathways for the processing of DNA lesions during replication. Over the past few years, significant progress has been made not only with respect to the molecular consequences that each of the modifications has for the properties of PCNA, but also in terms of the cellular signals that elicit the ubiquitylation or sumoylation of PCNA in the appropriate situations. This review will discuss the regulatory mechanisms that control PCNA modifications, emphasizing the important role of the DNA template on which PCNA acts in activating the relevant ubiquitin and SUMO conjugation factors, and pointing out similarities as well as some interesting variations among different organisms in the regulation of PCNA modifications.
Ulrich
Helle D
HD
Cancer Research UK London Research Institute, Clare Hall Laboratories, Blanche Lane, South Mimms, EN6 3LD, United Kingdom. helle.ulrich@cancer.org.uk
D002453:Cell Cycle; D004247:DNA / Q000378:metabolism; D004249:DNA Damage; D006801:Humans; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism*; D011499:Protein Processing, Post-Translational; D011995:Recombination, Genetic; D051716:Replication Protein A / Q000502:physiology; D025841:Small Ubiquitin-Related Modifier Proteins / Q000378:metabolism; D025801:Ubiquitin / Q000378:metabolism; D054875:Ubiquitination
D018809:Proliferating Cell Nuclear Antigen; D051716:Replication Protein A; D025841:Small Ubiquitin-Related Modifier Proteins; D025801:Ubiquitin; D004247:DNA