Required to establish and maintain the arrest of oocytes at the second meiotic metaphase until fertilization. Probably acts by inhibiting the anaphase-promoting complex/cyclosome (APC/C) ubiquitin ligase. Probably recognizes and binds to some phosphorylated proteins and promotes their ubiquitination and degradation (By similarity). Protein modification; protein ubiquitination. Part of a SCF (SKP1-cullin-F-box) protein ligase complex. Interacts with CDC20 (By similarity). Phosphorylated on Thr-190 and Ser-289 in response to calcium, which is a prerequisite for ubiquitination and proteasomal degradation. Ubiquitinated in response to calcium, which promotes proteasomal degradation.