pfam00240: ubiquitin (This model is not part of the current CDD release)
Ubiquitin family
This family contains a number of ubiquitin-like proteins: SUMO (smt3 homologue), Nedd8, Elongin B, Rub1, and Parkin. A number of them are thought to carry a distinctive five-residue motif termed the proteasome-interacting motif (PIM), which may have a biologically significant role in protein delivery to proteasomes and recruitment of proteasomes to transcription sites.
Jiyao W et al.(2023). "The conserved domain database in 2023.",