Enables histone pre-mRNA DCP binding activity. Predicted to be involved in spliceosomal snRNP assembly. Predicted to act upstream of or within protein methylation. Located in cytoplasm and nucleus. Human ortholog(s) of this gene implicated in systemic lupus erythematosus. Orthologous to human SNRPD3 (small nuclear ribonucleoprotein D3 polypeptide). [provided by Alliance of Genome Resources, Apr 2022]