This domain is specific to the N-terminal part of the prp1 splicing factor, which is involved in mRNA splicing (and possibly also poly(A)+ RNA nuclear export and cell cycle progression). This domain is specific to the N terminus of the RNA splicing factor encoded by prp1 [1]. It is involved in mRNA splicing and possibly also poly(A)and RNA nuclear export and cell cycle progression.

1: Isolation of novel pre-mRNA splicing mutants of Schizosaccharomyces pombe. Urushiyama S, Tani T, Ohshima Y; Mol Gen Genet 1996;253:118-127. PMID:9003295