R3H domain of encore-like and DIP1-like proteins. Drosophila encore is involved in the germline exit after four mitotic divisions, by facilitating SCF-ubiquitin-proteasome-dependent proteolysis. Maize DBF1-interactor protein 1 (DIP1) containing an R3H domain is a potential regulator of DBF1 activity in stress responses. The name of the R3H domain comes from the characteristic spacing of the most conserved arginine and histidine residues. The function of the domain is predicted to bind ssDNA or ssRNA in a sequence-specific manner.