Multiprotein complex (SCF) with cullin and F-box-containing protein. Capable of undergoing aggregation. Expressed throughout the life cycle. O-linked glycan consists of linear Gal-Gal-Fuc-Gal-GlcNAc. FpaA and fpaB seem to be identically glycosylated. Glycosylation is required for nuclear enrichment. Hydroxylated by phyA. The mass corresponds to the peptide with Ser-2 acetylated, Pro-143 hydroxylated and modified by a GlcNAc residue. There are two genes coding for Skp1, they only differ in a single position in the coding region. Belongs to the SKP1 family.