EC Number   |
General Information |
Reference |
|---|
   6.3.1.19 | physiological function |
enzyme PafA, the prokaryotic ubiquitin-like protein (Pup) ligase, catalyzes the Pup modification of bacterial proteins and targets the substrates for proteasomal degradation. Mycobacterium smegmatis PafA can be poly-pupylated. Self-pupylation of PafA is reversely regulated by Dop, a dual-functional enzyme, functioning as deaminase to convert PupQ to PupE and also as depupylase to remove Pup from the pupylated proteins. The self-pupylation of PafA is involved in the regulation of its stability |
-, 746202 |
| 6.3.1.19 | physiological function |
in Mycobacterium tuberculosis Pup tagging is important for virulence |
-, 730010 |
| 6.3.1.19 | physiological function |
prokaryotic ubiquitin-like protein (Pup) is a small protein that can be covalently attached to lysine side chains of cellular proteins by Pup ligase PafA. Pupylation serves as a recruitment tool for proteasomal degradation. For Mycobacterium tuberculosis, pupylation and the recruitment of pupylated substrates to the proteasome support persistence inside host macrophages during pathogenesis. Pup serves as both recognition and threading element in proteasomal degradation of pupylated substrates. The degradation substrate covalently modified with Pup is recruited to the Mpa-proteasome complex by docking to the Mpa coiled-coil domain, which triggers Pup to undergo a disorder-to-order transition, forming an extended helix that associates into a shared three-stranded coil with the Mpa N-terminal coiled-coil domains. The disordered N-terminal region of Pup points into the Mpa central pore, where it is engaged by the ATPase-driven pore loops for unfolding and directional translocation into the proteasome core for degradation. Structure-function analysis, overview |
-, 745555 |
| 6.3.1.19 | physiological function |
prokaryotic ubiquitin-like protein (Pup) is a small protein that can be covalently attached to lysine side chains of cellular proteins by Pup ligase PafA. Pupylation serves as a recruitment tool for proteasomal degradation. Pup serves as both recognition and threading element in proteasomal degradation of pupylated substrates. The degradation substrate covalently modified with Pup is recruited to the Mpa-proteasome complex by docking to the Mpa coiled-coil domain, which triggers Pup to undergo a disorder-to-order transition, forming an extended helix that associates into a shared three-stranded coil with the Mpa N-terminal coiled-coil domains. The disordered N-terminal region of Pup points into the Mpa central pore, where it is engaged by the ATPase-driven pore loops for unfolding and directional translocation into the proteasome core for degradation. Structure-function analysis, overview |
-, 745555 |
| 6.3.1.19 | physiological function |
prokaryotic ubiquitin-like protein, Pup, is conjugated to proteins by PafA, the only Pup ligase identified thus far, through the formation of an iso-peptide bond between the gamma-carboxylate of a glutamate side chain at the C terminus of Pup and the epsilon-amine of a lysine residue on the target protein. Pupylation is a cytoplasmic signal for proteasomal degradation. Pup ligase PafA conjugates the small protein Pup to lysine side chains of target proteins. Mono-Pup moieties are almost exclusively observed in vivo and are sufficient as degradation tags |
-, 744878 |
| 6.3.1.19 | physiological function |
Pup, a ubiquitin analogue, is conjugated to proteins through the activities of two enzymes, Dop (deamidase of Pup) and PafA (proteasome accessory factor A), the Pup ligase. Dop also catalyzes depupylation. Pupylation is a reversible process, with pupylated proteins being rescued from degradation following depupylation by Dop (deamidase of Pup). PafA (proteasome accessory factor A) and Dop are homologous enzymes, both binding Pup through interaction with its extended C-terminal region |
-, 746316 |
| 6.3.1.19 | physiological function |
pupylation is a signal for proteasomal degradation in bacteria. The prokaryotic, ubiquitin-like protein (Pup) is conjugated through its C-terminal residue to lysine side chains of substrates via an isopeptide bond |
-, 729308 |
| 6.3.1.19 | physiological function |
pupylation, the bacterial equivalent of ubiquitylation, involves the conjugation of a prokaryotic ubiquitin-like protein (Pup) to protein targets. In contrast to the ubiquitin system, where many ubiquitin ligases exist, a single bacterial ligase, PafA, catalyzes the conjugation of Pup to a wide array of protein targets |
-, 745553 |
