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- Title
An acidic morpholine derivative containing glyceride from thraustochytrid, Aurantiochytrium.
- Authors
Kaya, Kunimitsu; Shiraishi, Fujio; Iida, Tetsuo; Yamada, Masaki; Sano, Tomoharu
- Abstract
A novel acidic morpholine-derivative containing glyceride (M-glyceride) was isolated from the cells of two strains of the thraustochytrid, Aurantiochytrium. The glyceride accounted for approximately 0.1 -0.4% of the lyophilized cells. The glyceride consisted of peaks I (85%) and II (15%). The structures of the intact and acetylated glycerides were elucidated by liquid chromatography-quadrupole time-of-flight chromatograph mass spectrometer (LC–Q/TOF) and NMR spectroscopy. The hydrate type of M-glyceride was detected as a minor component by LC–MS/MS. By 2D-NMR experiments, peaks I of the intact M-glyceride were elucidated as 1,2-didocosapentaenoyl-glyceryl-2′-oxy-3′-oxomorpholino propionic acid, and peak II was estimated 1,2-palmitoyldocosapentaenoyl- and/or 1,2-docosapentaenoylpalmitoyl-glyceryl-2′-oxy-3′-oxomorpholino propionic acid. The double bond position of docosapentaenoic acid was of the ω − 6 type (C22 = 5.ω − 6). The M-glyceride content varied by the cell cycle. The content was 0.4% of lyophilized cells at the mid logarithmic phase, and decreased to 0.1% at the mid stationary phase. When cells were grown in 1.0 µM M-glyceride-containing growth media, cell growth was stimulated to 110% of the control. With 0.1 µM acetyl M-glyceride, stimulation of 113% of the control was observed. Finding morpholine derivatives in biological components is rare, and 2-hydroxy-3-oxomorpholino propionic acid (auranic acid) is a novel morpholine derivative.
- Subjects
MORPHOLINE; CHEMICAL derivatives; GLYCERIDES; LIQUID chromatography-mass spectrometry; PROPIONIC acid
- Publication
Scientific Reports, 2021, Vol 11, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-021-85636-1