An essential step in mRNA turnover is decapping. In yeast, two proteins have been identified that are essential for decapping, Dcp1 (this family) and Dcp2 (Pfam:PF05026). The precise role of these proteins in the decapping reaction have not been established. Evidence suggests that the Dcp1 may enhance the function of Dcp2 [1].

1: Analysis of recombinant yeast decapping enzyme. Steiger M, Carr-Schmid A, Schwartz DC, Kiledjian M, Parker R; RNA 2003;9:231-238. PMID:12554866