Methods for Studies of Protein Interactions with Different DNA Methyltransferases

There are now many methods available for studying protein interactions between DNA methltransferases (DNMTs) and their binding partners. Here we describe a step-by-step procedure to identify whether proteins of interest interact with DNMTs by co-immunoprecipitation (co-IP) assay in transiently transfected cells. Though one mammalian cell is described, investigators can use the same method with other cell lines or primary cells for in vivo protein interaction studies.