A kinetic model for the prevalence of mono‐ over poly‐pupylation

Abstract excerpt

Bacteria belonging to the phyla Actinobacteria and Nitrospira possess proteasome cores homologous to the eukaryotic 20S proteasome particle. In these bacteria, the cytoplasmic signal for proteasomal degradation is a small protein termed Pup (prokaryotic ubiquitin-like protein). PafA, the only known Pup ligase, conjugates Pup to lysine side chains of target proteins. In contrast to the eukaryotic...

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