Predicted to enable ATP binding activity; catalytic activity, acting on RNA; and protein tyrosine/serine/threonine phosphatase activity. Predicted to be involved in 7-methylguanosine mRNA capping and dephosphorylation. Is an ortholog of C. elegans cel-1. In C. elegans, cel-1 is involved in polynucleotide 5' dephosphorylation and positive regulation of gene expression.