S-phase kinase-associated protein 1 is an enzyme that in humans is encoded by the SKP1gene.[5][6][7]
This gene encodes a protein that is a member of the SCFubiquitin ligaseprotein complex. It binds to F-box proteins (proteins containing an F-box motif), such as cyclin F, S-phase kinase-associated protein 2, and other regulatory proteins involved in ubiquitin dependent proteolysis.[8] The encoded protein also collaborates with a network of proteins to control beta-catenin levels and affects the activity level of beta-catenin dependent TCF transcription factors. Studies have also characterized the protein as an RNA polymerase II elongation factor. Alternative splicing of this gene results in two transcript variants. A related pseudogene has been identified on chromosome 7.
^Demetrick DJ, Zhang H, Beach DH (July 1996). "Chromosomal mapping of the genes for the human CDK2/cyclin A-associated proteins p19 (SKP1A and SKP1B) and p45 (SKP2)". Cytogenet Cell Genet. 73 (1–2): 104–7. doi:10.1159/000134318. PMID8646875.