cell division cycle 40 homolog (S. cerevisiae); Associates with the spliceosome late in the splicing pathway and may function in the second step of pre-mRNA splicing (579 aa)

SLU7 splicing factor homolog (S. cerevisiae); Participates in the second catalytic step of pre-mRNA splicing, when the free hydroxyl group of exon I attacks the 3’- splice site to generate spliced mRNA and the excised lariat intron. Required for holding exon 1 properly in the spliceosome and for correct AG identification when more than one possible AG exists in 3’-splicing site region. May be involved in the activation of proximal AG. Probably also involved in alternative splicing regulation (586 aa)

PRP19/PSO4 pre-mRNA processing factor 19 homolog (S. cerevisiae); Plays a role in DNA double-strand break (DSB) repair. Binds double-stranded DNA in a sequence-nonspecific manner. Acts as a structural component of the nuclear framework. May also serve as a support for spliceosome binding and activity. Essential for spliceosome assembly in a oligomerization-dependent manner and might also be important for spliceosome stability. May have E3 ubiquitin ligase activity. The PSO4 complex is required in the DNA interstrand cross-links (ICLs) repair process. Component of the PRP19-CDC5L comple [...] (504 aa)

crooked neck pre-mRNA splicing factor-like 1 (Drosophila) (848 aa)

BUD31 homolog (S. cerevisiae) (144 aa)

SYF2 homolog, RNA splicing factor (S. cerevisiae); May be involved in pre-mRNA splicing (By similarity) (243 aa)

ISY1 splicing factor homolog (S. cerevisiae); May play a role in pre-mRNA splicing (Potential) (307 aa)

PRP8 pre-mRNA processing factor 8 homolog (S. cerevisiae); Functions as a scaffold that mediates the ordered assembly of spliceosomal proteins and snRNAs. Required for the assembly of the U4/U6-U5 tri-snRNP complex. Functions as scaffold that positions spliceosomal U2, U5 and U6 snRNAs at splice sites on pre-mRNA substrates, so that splicing can occur. Interacts with both the 5’ and the 3’ splice site (2335 aa)