The PRO8NT domain is found at the N-terminus of pre-mRNA splicing factors of PRO8 family [1]. The NLS or nuclear localisation signal for these spliceosome proteins begins at the start and runs for 60 residues. N-terminal to this domain is a highly variable proline-rich region [4].

1: Insights into the evolution of the nucleolus by an analysis of its protein domain repertoire. Staub E, Fiziev P, Rosenthal A, Hinzmann B; Bioessays 2004;26:567-581. PMID:15112237

2: Prp8 protein: at the heart of the spliceosome. Grainger RJ, Beggs JD; RNA. 2005;11:533-557. PMID:15840809

3: Prp8p dissection reveals domain structure and protein interaction sites. Boon KL, Norman CM, Grainger RJ, Newman AJ, Beggs JD; RNA. 2006;12:198-205. PMID:16373487

4: Dissection of Prp8 protein defines multiple interactions with crucial RNA sequences in the catalytic core of the spliceosome. Turner IA, Norman CM, Churcher MJ, Newman AJ; RNA. 2006;12:375-386. PMID:16431982