Abstract
Crude castor oil hydrolysates mainly consisting of ricinoleic acid can be biologically converted to 11-hexyloxy-9-undecenoic acid (C18) with an unsaturated bond and an ester bond which is utilized as a fertile chemical platform. The platform chemical of 11-hexyloxy-9-undecenoic acid can be converted to ω-hydroxyundec-9-enoic acid or dicarboxylic acid via simple chemical or biological conversion. In this study, the biotransformation was directly performed from crude castor oil hydrolysates containing 82% ricinoleic acid using the recombinant Escherichia coli BL21 with two plasmids containing Micrococcus luteus alcohol dehydrogenase and Pseudomonas putida KT2440 Baeyer-Villiger monooxygenase, respectively. The recombinant cells were cultured in Riesenberg medium at pH 6.9 and 20°C for 28.5 h. For biotransformation at 35°C for 2 h, 2.54 g/L 11-hexyloxy-9-undecenoic acid was obtained from crude castor oil hydrolysates with the final concentration of 2.98 g/L ricinoleic acid. The yield and volumetric productivity were 81.34% and 1.22 g/L/h, respectively. Herein, direct conversion of crude castor oil hydrolysates to value-added 11-hexyloxy-9-undecenoic acid was successfully demonstrated.
Original language | English |
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Pages (from-to) | 362-368 |
Number of pages | 7 |
Journal | Process Biochemistry |
Volume | 51 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2016 |
Bibliographical note
Funding Information:This study was supported by the R&D Program of MOTIE/KEIT [ 10044604 ], Korea.
Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
Keywords
- 11-hexyloxy-9-undecenoic acid
- 12-oxo-9-octadecenoic acid
- Alcohol dehydrogenase
- Baeyer-Villiger monooxygenase
- Ricinoleic acid