The function of BUD13 (BUD13 spliceosome associated protein, Ensembl gene identifier ENSG00000137656) is as follows. Involved in pre-mRNA splicing as component of the activated spliceosome. As a component of the minor spliceosome, involved in the splicing of U12-type introns in pre-mRNAs. {ECO:0000269|PubMed:29360106, ECO:0000269|PubMed:29361316, ECO:0000269|PubMed:35670808, ECO:0000305|PubMed:33509932}.