| Myrosinase |
A plant sugar-cleaving enzyme that has evolved from GH1 β-glucosidases by losing one of the two catalytic Glu residues, which has been replaced by an ascorbate cofactor. |
Burmeister et al. (2000 ▶) |
| α-Lactalbumin |
Noncatalytic protein; shares 40% sequence identity with type C lysozymes; would be predicted to be a lysozyme based on sequence similarity. |
Brew et al. (1967 ▶) |
| Wheat xylanase inhibitor protein XIP-I |
A xylanase inhibitor that displays sequence and structural similarity to chitinases, but has nonetheless lost its catalytic activity. Many orthologs are still annotated in GenBank as putative chitinases (for example, GenBank BAC10141). |
Payan et al. (2004 ▶) |
| Glycosidase family 97 proteins (GH97) |
This family contains two subgroups, each with different catalytic machinery and stereochemical outcome, making it difficult to define the catalytic machinery based on invariant acidic residues. |
Gloster et al. (2008 ▶) |
| Glycosidase GH4 and GH109 proteins |
Proteins from these families would be classified as NAD oxidoreductases based on sequence and structure only. |
Liu et al. (2007 ▶) |
