Paper Report for: Dong_2017_J.Agric.Food.Chem_65_2120
Reference
Title: Whole-Cell Biocatalytic Synthesis of Cinnamyl Acetate with a Novel Esterase from the DNA Library of Acinetobacter hemolyticus Dong H, Secundo F, Xue C, Mao X Ref: Journal of Agricultural and Food Chemistry, 65:2120, 2017 : PubMed
Cinnamyl acetate has a wide application in the flavor and fragrance industry because of its sweet, balsamic, and floral odor. Up to now, lipases have been mainly used in enzyme-mediated synthesis of cinnamyl acetate, whereas esterases are used in only a few cases. Moreover, the use of purified enzymes is often a disadvantage, which leads to increases of the production costs. In this paper, a genomic DNA library of Acinetobacter hemolyticus was constructed, and a novel esterase (EstK1) was identified. After expression in Escherichia coli, the whole-cell catalyst of EstK1 displayed high transesterification activity to produce cinnamyl acetate in nonaqueous systems. Furthermore, under optimal conditions (vinyl acetate as acyl donor, isooctane as solvent, molar ratio 1:4, temperature 40 degrees C), the conversion ratio of cinnamyl alcohol could be up to 94.1% at 1 h, and it reached an even higher level (97.1%) at 2 h.
        
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Dong H, Secundo F, Xue C, Mao X (2017) Whole-Cell Biocatalytic Synthesis of Cinnamyl Acetate with a Novel Esterase from the DNA Library of Acinetobacter hemolyticus Journal of Agricultural and Food Chemistry65: 2120-2128
Dong H, Secundo F, Xue C, Mao X (2017) Journal of Agricultural and Food Chemistry65: 2120-2128