Enables U1 snRNP binding activity. Predicted to be involved in mRNA 5'-splice site recognition and spliceosomal snRNP assembly. Located in nucleus. Part of U1 snRNP. Human ortholog(s) of this gene implicated in connective tissue disease; mixed connective tissue disease; and systemic lupus erythematosus. Orthologous to human SNRPC (small nuclear ribonucleoprotein polypeptide C). [provided by Alliance of Genome Resources, Apr 2022]