Title : Identification of a Novel Feruloyl Esterase by Functional Screening of a Soil Metagenomic Library - Li_2019_Appl.Biochem.Biotechnol_187_424 |
Author(s) : Li X , Guo J , Hu Y , Yang Y , Jiang J , Nan F , Wu S , Xin Z |
Ref : Appl Biochem Biotechnol , 187 :424 , 2019 |
Abstract :
A cosmid metagenomic library containing 1.3 x 10(5) clones was created from a soil sample. A novel gene (fae-xuan) encoding a feruloyl esterase was identified through functional screening. Primary sequence analysis showed that the gene consisted of 759 base pairs and encoded a protein of 252 amino acids. The gene was expressed in Escherichia coli BL21 (DE3) and the corresponding purified recombinant enzyme exhibited a molecular weight of 29 kDa. The FAE-Xuan showed high activity (40.0 U/mg) toward methyl ferulate with an optimal temperature and pH of 30 degreesC and 5.0, respectively. Besides methyl ferulate, FAE-Xuan can also hydrolyze methyl sinapate and methyl p-coumarate. The substrate utilization preferences and phylogenetic analysis indicated that FAE-Xuan belongs to type A FAE. FAE-Xuan was quite stable over a broad pH range from 3.0 to 10.0. The activity reduced remarkably in presence of Cu(2+). FAE-Xuan can enhance the quantity of ferulic acid from de-starched wheat bran in presence of xylanase. The work presented here highlighted the effectiveness of metagenomic strategy in identifying novel FAEs with diverse properties for potential use in industrial production. |
PubMedSearch : Li_2019_Appl.Biochem.Biotechnol_187_424 |
PubMedID: 29968147 |
Li X, Guo J, Hu Y, Yang Y, Jiang J, Nan F, Wu S, Xin Z (2019)
Identification of a Novel Feruloyl Esterase by Functional Screening of a Soil Metagenomic Library
Appl Biochem Biotechnol
187 :424
Li X, Guo J, Hu Y, Yang Y, Jiang J, Nan F, Wu S, Xin Z (2019)
Appl Biochem Biotechnol
187 :424