Binds single-stranded RNA. Involved in the process of mRNA degradation and in the positive regulation of mRNA decapping (By similarity). Homodimer (via YjeF N-terminal domain). Forms a complex with DCP1A, DCP2, DDX6 and EDC4/HEDLS, within this complex directly interacts with DCP1A and DDX6. Interacts with ZFP36. Processing bodies (PB). The DFDF domain is unstructured by itself. It assumes a helical fold upon interaction with DDX6 (By similarity). Belongs to the EDC3 family.