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Effect of cyanocobalamin and p-toluic acid on the fatty acid composition of Schizochytrium limacinum (Thraustochytriaceae, Labyrinthulomycota)

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Mycoscience

Abstract

Changes in the fatty acid composition of docosahexaenoic acid (DHA)-producing Schizochytrium limacinum SR21 were investigated. The addition of cyanocobalamin, which is an active component of vitamin B12, decreased the content of odd-chain fatty acids such as pentadecanoic acid (C15:0) and heptadecanoic acid (C17:0). Cyanocobalamin may upregulate the cobalamin-dependent methylmalonyl-CoA mutase, which converts propionic acid to succinic acid, thereby decreasing the content of odd-chain fatty acids. The addition of p-toluic acid resulted in a decrease in docosapentaenoic acid (DPA, 22:5n-6) content and an increase in eicosapentaenoic acid (EPA, 20:5n-3) content in a dose-dependent manner. Two additional peaks of fatty acids, characterized as Δ4,7,10,14-eicosatetraenoic acid (20:4n-7) and Δ4,7,10,14-docosatetraenoic acid (22:4n-9), were detected.

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Authors and Affiliations

  1. Department of Applied Biological Chemistry, Faculty of Agriculture, Kinki University, 3327-204 Nakamachi, Nara, 631-8505, Japan

    Norifumi Shirasaka

  2. Department of Food and Nutrition, Faculty of Agriculture, Kin-ki University, Nara, Japan

    Yukari Hirai, Haruka Nakabayashi & Hajime Yoshizumi

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  1. Norifumi Shirasaka
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  2. Yukari Hirai
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  3. Haruka Nakabayashi
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  4. Hajime Yoshizumi
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Correspondence to Norifumi Shirasaka.

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Shirasaka, N., Hirai, Y., Nakabayashi, H. et al. Effect of cyanocobalamin and p-toluic acid on the fatty acid composition of Schizochytrium limacinum (Thraustochytriaceae, Labyrinthulomycota). Mycoscience 46, 358–363 (2005). https://doi.org/10.1007/s10267-005-0259-3

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  • DOI: https://doi.org/10.1007/s10267-005-0259-3

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