Required for cig2 degradation in the G2 and M phases of the cell cycle. Together with pof6, essential for septum processing and cell separation. Involved in mitotic progression, essential for the execution of anaphase B; required for coordinated structural alterations of mitotic spindles and segregation of nuclear membrane structures at anaphase. Involved in the DNA damage checkpoint pathway and maintenance of genome integrity. Component of the RAVE complex which is required for stable assembly of the vacuolar ATPase complex V-ATPase. Essential component of the E3 ubiquitin ligase Skp1-Cullin-1-F-box (SCF) complex. Interacts with cul1, fbh1, mcs2, pip1, pof1, pof2, pof3, pof4, pof5, pof6, pof7, pof8, pof9, pof10, pof11, pof12, pof13, pof14, pop1, pop2 and tfb3. Forms a complex with pof6 and sip1. Component of the RAVE complex composed of rav1, rav2 and skp1. Belongs to the SKP1 family.