Bioconversion of lutein by Enterobacter hormaechei to form a new compound, 8-methyl-α-ionone
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To investigate the final product of the bioconversion of lutein by a novel lutein-degrading bacterium, Enterobacter hormaechei A20, and the kinetics of the process.
A new product, 8-methyl-α-ionone, was resolved by GC–MS. The compound was further identified by NMR. A conversion yield of 90% was achieved by E. hormaechei in 36 h with 10 g lutein l−1.
This is the first report of the bioconversion of lutein to form 8-methyl-α-ionone. A degradation pathway is proposed.
KeywordsBioconversion Enterobacter hormaechei Lutein 8-Methyl-α-ionone
This work was partially supported by the National Natural Science Foundation of China (Grant No. 21476217) and Program for Science & Technology Innovation Talents in Universities of Henan Province (16HASTIT013).
Supplementary Figure 1—1H NMR spectrum of 8-methyl-α-ionone.
Supplementary Figure 2—13C NMR spectrum of 8-methyl-α-ionone.
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