From: A gold standard set of mechanistically diverse enzyme superfamilies
Superfamily | Common chemical capability | Fold* | Number of families | Number of sequences†| Number of structures‡ |
---|---|---|---|---|---|
Amidohydrolase | Metal ion(s) deprotonate water for nucleophilic attack on substrate | TIM beta/alpha-barrel | 29 | 905 | 98 |
Crotonase | Stabilization of enolate anion intermediate derived from acyl-CoA substrate | ClpP/crotonase | 16 | 970 | 22 |
Enolase | Abstraction of proton alpha to carboxylic acid, leading to a stabilized enolate anion intermediate | TIM beta/alpha-barrel | 9 | 1,050 | 63 |
Haloacid dehalogenase | Active site Asp forms covalent enzyme-substrate intermediate, facilitating cleavage of C-Cl, P-C or P-O bond | HAD-like | 20 | 1,281 | 50 |
Vicinal oxygen chelate | Metal coordination environment promotes direct electrophilic participation of metal in catalysis | Glyoxalase/bleomycin resistance protein/dihydroxybiphenyl dioxygenase | 17 | 681 | 49 |