Enzymatic Synthesis of Astaxanthin n-Octanoic Acid Esters

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  • Nakao Masahiro
    Institute for Advanced Technology, Technological Development Center, Suntory Ltd.
  • Sumida Motoo
    Institute for Health Care Science, Technological Development Center, Suntory Ltd.
  • Katano Kenji
    Institute for Health Care Science, Technological Development Center, Suntory Ltd.
  • Fukami Harukazu
    Department of Bioscience and Biotechnology, Faculty of Bioenvironmental Science, Kyotogakuen University

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We examined the enzymatic synthesis of astaxanthin n-octanoic acid esters. Carriers for the immobilized enzyme and reaction conditions such as water content, reaction temperature, and time were examined using Candida cylindracea lipase (Lipase OF®). Lipase OF® immobilized by a hydrophobic anion exchange resin (10% w/w content of lipase) gave the best yield in the esterification reaction of astaxanthin. Two milligrams of astaxanthin per 750 μL tri-n-octanoin (ca. 0.3%) was optimum because of the low solubility of tri-n-octanoin. The esters were obtained in a yield of 36.4% under the optimal reaction conditions.<br>

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