PKC Isoforms and Their Role in Phosphorylating DNMT1
Author Information
Author(s): Geneviève Lavoie, Pierre-Olivier Estève, Nathalie Bibens Laulan, Sriharsa Pradhan, Yves St-Pierre
Primary Institution: Institut national de la recherche scientifique, INRS-Institut Armand-Frappier, Laval, QC, Canada
Hypothesis
The individual contribution of PKC isoforms in their ability to phosphorylate DNMT1 remains unknown.
Conclusion
Phosphorylation of human DNMT1 by PKC is isoform-specific and indicates cooperation between PKCζ and DNMT1 in controlling DNA methylation patterns.
Supporting Evidence
- PKCα, βI, βII, δ, γ, η, ζ and μ preferentially phosphorylate the N-terminal domain of human DNMT1.
- PKCζ physically interacts with DNMT1 in vivo.
- Overexpression of PKCζ and DNMT1 reduces the methylation status of genes across the genome.
Takeaway
Different types of PKC proteins can attach to and change DNMT1, which helps control how genes are turned on or off in our DNA.
Methodology
In vitro phosphorylation assays and co-immunoprecipitation experiments were conducted to study the interaction between PKC isoforms and DNMT1.
Limitations
The study primarily focuses on specific PKC isoforms and may not account for other factors influencing DNMT1 activity.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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