Component of the cleavage and polyadenylation factor (CPF) complex, which plays a key role in polyadenylation-dependent pre-mRNA 3'-end formation and cooperates with cleavage factors including the CFIA complex and NAB4/CFIB. Component of the cleavage and polyadenylation factor (CPF) complex, which is composed of cft1, cft2, ysh1, pta1, swd2, pfs2, dis2, yth1, ssu72, and fip1. To yeast PTA1.