Involved in ubiquitination and subsequent proteasomal degradation of target proteins. Together with CUL1, a RING-box and a F-box protein, it forms a SCF E3 ubiquitin ligase complex. The functional specificity of this complex depends on the type of F-box protein. In the SCF complex, it serves as an adapter that links the F-box protein to CUL1. Protein modification; protein ubiquitination. Part of a SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex (PubMed:28494021). Interacts directly with MOF (via F-box domain) (PubMed:27436711). Interacts with rice black streaked dwarf virus RBSDV protein P7-2 (PubMed:24176102, PubMed:28494021). Is able to form the SCF complex together with CUL1 and the viral P7-2 protein (PubMed:28494021). Interacts with D3 (PubMed:24616269). Highly expressed during early anther development. Belongs to the SKP1 family.