This is the C terminal domain of the pre-mRNA processing factor Prp31. Prp31 is required for U4/U6.U5 tri-snRNP formation [2]. In humans this protein has been linked to autosomal dominant retinitis pigmentosa [2][3].

1: The PRP31 gene encodes a novel protein required for pre-mRNA splicing in Saccharomyces cerevisiae. Weidenhammer EM, Singh M, Ruiz-Noriega M, Woolford JL Jr; Nucleic Acids Res. 1996;24:1164-1170. PMID:8604353

2: Protein 61K, encoded by a gene (PRPF31) linked to autosomal dominant retinitis pigmentosa, is required for U4/U6*U5 tri-snRNP formation and pre-mRNA splicing. Makarova OV, Makarov EM, Liu S, Vornlocher HP, Luhrmann R; EMBO J. 2002;21:1148-1157. PMID:11867543

3: Disease mechanism for retinitis pigmentosa (RP11) caused by mutations in the splicing factor gene PRPF31. Deery EC, Vithana EN, Newbold RJ, Gallon VA, Bhattacharya SS, Warren MJ, Hunt DM, Wilkie SE; Hum Mol Genet. 2002;11:3209-3219. PMID:12444105