Probable assembly factor of SCF (SKP1-CUL1-F-box protein) E3 ubiquitin ligase complexes that promotes the exchange of the substrate-recognition F-box subunit in SCF complexes, thereby playing a key role in the cellular repertoire of SCF complexes. Binds TBP, CNOT3 and UBE3C. Expressed in epididymis (at protein level). Ubiquitinated and targeted for proteasomal degradation. Belongs to the CAND family.