label: [prokaryotic ubiquitin-like protein]-C-terminal-L-glutamate + NH4(+) => [prokaryotic ubiquitin-like protein]-C-terminal-L-glutamine + H2O
label_lc: [prokaryotic ubiquitin-like protein]-c-terminal-l-glutamate + nh4(+) => [prokaryotic ubiquitin-like protein]-c-terminal-l-glutamine + h2o