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Whole-Cell Biocatalytic Synthesis of Cinnamyl Acetate With a Novel Esterase From the DNA Library of Acinetobacter Hemolyticus

Whole-Cell Biocatalytic Synthesis of Cinnamyl Acetate With a Novel Esterase From the DNA Library of Acinetobacter Hemolyticus

Hao Dong, Francesco Secundo, Changhu Xue, Xiangzhao Mao

J Agric Food Chem. 2017 Mar 15;65(10):2120-2128.

PMID: 28220703

Abstract:

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 °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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP103548	Cinnamyl acetate		103-54-8	Price

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