Component of the U7 snRNP complex that is involved in the histone 3'-end pre-mRNA processing ( ). Increases U7 snRNA levels but not histone 3'-end pre-mRNA processing activity, when overexpressed (, ). Required for cell cycle progression from G1 to S phases (By similarity). Binds specifically to the Sm-binding site of U7 snRNA (, ).
Subcellular locations: Nucleus