The Enzyme Database

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Accepted name: prokaryotic ubiquitin-like protein ligase
Reaction: ATP + [prokaryotic ubiquitin-like protein]-L-glutamate + [protein]-L-lysine = ADP + phosphate + N6-([prokaryotic ubiquitin-like protein]-γ-L-glutamyl)-[protein]-L-lysine
Other name(s): PafA (ambiguous); Pup ligase; proteasome accessory factor A
Systematic name: [prokaryotic ubiquitin-like protein]:[protein]-L-lysine
Comments: The enzyme has been characterized from the bacteria Mycobacterium tuberculosis and Corynebacterium glutamicum. It catalyses the ligation of the prokaryotic ubiquitin-like protein (Pup) to a target protein by forming a bond between an ε-amino group of a lysine residue of the target protein and the γ-carboxylate of the C-terminal glutamate of the ubiquitin-like protein (Pup). The attachment of Pup, also known as Pupylation, marks proteins for proteasomal degradation.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Sutter, M., Damberger, F.F., Imkamp, F., Allain, F.H. and Weber-Ban, E. Prokaryotic ubiquitin-like protein (Pup) is coupled to substrates via the side chain of its C-terminal glutamate. J. Am. Chem. Soc. 132 (2010) 5610–5612. [DOI] [PMID: 20355727]
2.  Guth, E., Thommen, M. and Weber-Ban, E. Mycobacterial ubiquitin-like protein ligase PafA follows a two-step reaction pathway with a phosphorylated pup intermediate. J. Biol. Chem. 286 (2011) 4412–4419. [DOI] [PMID: 21081505]
3.  Ofer, N., Forer, N., Korman, M., Vishkautzan, M., Khalaila, I. and Gur, E. Allosteric transitions direct protein tagging by PafA, the prokaryotic ubiquitin-like protein (Pup) ligase. J. Biol. Chem. 288 (2013) 11287–11293. [DOI] [PMID: 23471967]
4.  Barandun, J., Delley, C.L., Ban, N. and Weber-Ban, E. Crystal structure of the complex between prokaryotic ubiquitin-like protein and its ligase PafA. J. Am. Chem. Soc. 135 (2013) 6794–6797. [DOI] [PMID: 23601177]
5.  Striebel, F., Imkamp, F., Özcelik, D. and Weber-Ban, E. Pupylation as a signal for proteasomal degradation in bacteria. Biochim. Biophys. Acta 1843 (2014) 103–113. [DOI] [PMID: 23557784]
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