Component of the SCF (SKP1-CUL1-F-box protein) E3 ubiquitin ligase complex, which mediates the ubiquitination and subsequent proteasomal degradation of target proteins. Through the RING-type zinc finger, seems to recruit the E2 ubiquitination enzyme to the complex and brings it into close proximity to the substrate (By similarity). Essential for meiosis, mitotic chromosomal condensation and cytokinesis. Involved in histone H3 phosphorylation. Protein modification; protein ubiquitination. Part of SCF complexes, which consist of a SKP1 or a SKP1-related protein, a cullin protein, and a F-box protein (By similarity). Interacts with csn-1 and csn-6. Strongly expressed in the gonads of hermaphrodite animals. Expressed at high levels in eggs and adults, and at low levels in larva. The RING-type zinc finger domain is essential for ubiquitin ligase activity. It coordinates an additional third zinc ion. Belongs to the RING-box family. It is uncertain whether Met-1 or Met-10 is the initiator.