| MF | HDA | GO:0003723 | RNA binding |
| MF | IBA | GO:0003723 | RNA binding |
| MF | NAS | GO:0003723 | RNA binding |
| MF | NAS | GO:0050733 | RS domain binding |
| MF | NAS | GO:0051082 | unfolded protein binding |
| BP | NAS | GO:0000244 | spliceosomal tri-snRNP complex assembly |
| BP | IBA | GO:0000381 | regulation of alternative mRNA splicing, via spliceosome |
| BP | IDA | GO:0000381 | regulation of alternative mRNA splicing, via spliceosome |
| BP | IBA | GO:0000395 | mRNA 5'-splice site recognition |
| BP | IDA | GO:0000395 | mRNA 5'-splice site recognition |
| BP | IBA | GO:0045292 | mRNA cis splicing, via spliceosome |
| BP | ISS | GO:0048025 | negative regulation of mRNA splicing, via spliceosome |
| CC | ISS | GO:0005654 | nucleoplasm |
| CC | IBA | GO:0016607 | nuclear speck |