Component of the decapping complex necessary for the degradation of mRNAs, both in normal mRNA turnover and in nonsense-mediated mRNA decay (By similarity). In contrast to orthologs, does not possess decapping activity and does not remove the 7-methyl guanine cap structure from mRNA molecules (PubMed:16199859). In the nervous system, negatively regulates the expression of insulin-like peptide ins-7, which in turn promotes longevity (PubMed:32366357). This may in part be through promoting the activity of daf-16 in distal tissues (PubMed:32366357). Required for the developmental axon guidance and regrowth of PLM touch receptor neurons (PubMed:31983639). In ADL sensory neurons, plays a role in ciliary shape formation (PubMed:28887031). Acts in neurons to promote larval survival at high temperatures by negatively regulating lin-14 expression (PubMed:28250105) (Probable). May be a component of the decapping complex composed of dcap-1 and dcap-2. Diffusely localized in the cytoplasm, but accumulates in puncta during pronuclear migration in embryos (PubMed:16267265). After pronuclear migration, accumulates in P-granules which segregated to the posterior cell, and smaller puncta scattered in the cytoplasm (PubMed:16267265). Localizes to cytoplasmic puncta in neuronal cell bodies of neurons such as touch receptor neurons (PubMed:31983639). In some cytoplasmic puncta in touch receptor neurons, co-localizes with car-1 (PubMed:31983639). Expressed in neurons including touch receptor neurons and motor neurons. Expressed in embryos (at protein level). Double RNAi-mediated knockdown with dcap-2 reduces survival at 20 degrees Celsius. Belongs to the DCP1 family.