Abstract
Three ferulic acid esterases from the filamentous fungus Chrysosporium lucknowense C1 were purified and characterized. The enzymes were most active at neutral pH and temperatures up to 45 °C. All enzymes released ferulic acid and p-coumaric acid from a soluble corn fibre fraction. Ferulic acid esterases FaeA1 and FaeA2 could also release complex dehydrodiferulic acids and dehydrotriferulic acids from corn fibre oligomers, but released only 20% of all ferulic acid present in sugar beet pectin oligomers. Ferulic acid esterase FaeB2 released almost no complex ferulic acid oligomers from corn fibre oligomers, but 60% of all ferulic acid from sugar beet pectin oligomers. The ferulic acid esterases were classified based on both, sequence similarity and their activities toward synthetic substrates. The type A ferulic acid esterases FaeA1 and FaeA2 are the first members of the phylogenetic subfamily 5 to be biochemically characterized. Type B ferulic acid esterase FaeB2 is a member of subfamily 6.
| Original language | English |
|---|---|
| Pages (from-to) | 77-85 |
| Journal | Enzyme and Microbial Technology |
| Volume | 50 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2012 |
Keywords
- sugar-beet pulp
- plant-cell walls
- aspergillus-niger
- maize bran
- feruloylated oligosaccharides
- structural-characterization
- wheat bran
- degradation
- classification
- arabinoxylans