Feruloyl esterase from <Emphasis Type="Italic">Alternaria tenuissima</Emphasis> that hydrolyses lignocellulosic material to release hydroxycinnamic acids |
| |
Authors: | D H Chi V D Giap L P H Anh D H Nghi |
| |
Institution: | 1.Institute of Biotechnology,Vietnam Academy of Science and Technology (VAST),Hanoi,Vietnam;2.Institute of Natural Products Chemistry,VAST,Hanoi,Vietnam;3.Graduate University of Science and Technology,VAST,Hanoi,Vietnam |
| |
Abstract: | An extracellular feruloyl esterase from the culture filtrates of the isolated fungus Alternaria tenuissima was successfully purified to apparent homogeneity by anion-exchange and size-exclusion chromatography. Peptide fragments of purified enzyme (designated as AltFAE; molecular weight of 30.3 kDa determined by SDS-PAGE) were identified by mass spectrometry using a NanoLC-ESI-MS/MS system. Michaelis-Menten constants (KM) and catalytic efficiencies (kcat/KM) were determined for typical substrates of feruloyl esterase, and the lowest KM of 50.6 μM (i.e., the highest affinity) and the highest kcat/KM (3.1 × 105 s—1 M–1) were observed for methyl p-coumarate and methyl ferulate, respectively. Not least, AltFAE catalyzed conversion of lignocellulosic material (e.g. wood meal) to release hydroxycinnamic products, i.e. ferulic- and p-coumaric acids. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|