pfam16093: PAC4 (This model is not part of the current CDD release)
Proteasome assembly chaperone 4
PAC4 or proteasome assembly chaperone 4 protein promotes assembly of the 20S proteasome. It interacts with PSMG3. It associates with alpha subunits of the 20S proteasome. At the very C-terminal is a crucial HbYX or hydrophobic-tyrosine-X sequence motif that, in proteasome activators, opens the 20S proteasome entry pore.
Jiyao W et al.(2023). "The conserved domain database in 2023.",