Isolation and structure of pulcherrimine, a novel bitter-tasting amino acid, from the sea urchin (Hemicentrotus pulcherrimus) ovaries |
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| Authors: | Murata Y Sata N U |
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| Affiliation: | National Research Institute of Fisheries Science, 2-12-4, Fukuura, Kanazawa-ku, Yokohama 236-8648, Japan. betty@nrifs.affrc.go.jp |
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| Abstract: | A novel sulfur-containing amino acid, pulcherrimine, has been isolated as a bitter principle from ovaries of the sea urchin Hemicentrotus pulcherrimus. The structure was elucidated as 4-(2'-carboxy-2'-hydroxy-ethylthio)-2-piperidinecarboxylic acid by spectroscopic and chemical methods. Absolute stereochemistry was determined by NOE experiments and chiral HPLC analysis. Pulcherrimine exhibited bitterness with a threshold value of 0.306 mM. |
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