Structural identification and physiological function evaluation of A new natural non-protein amino acid in Camellia ptilophylla
文献类型： 外文期刊
作者： Fang, Kaixing 1 ; Xu, Minghang 2 ; Qin, Dandan 1 ; Li, Hongjian 1 ; Ni, Erdong 1 ; Li, Bo 1 ; Wang, Qing 1 ; Wang, Qiushuang 1 ; Pan, Chendong 1 ; Deng, Shulin 2 ; Qiu, Shengxiang 2 ; Wu, Hualing 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Tea Res Inst, Guangdong Prov Key Lab Tea Plant Resources Innovat, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, South China Bot Garden, Guangzhou 510640, Peoples R China
关键词： Tea plants; Camellia ptilophylla; Amino acid; Camptinine; Natural compound; Anti-anxiety
期刊名称：FOOD CHEMISTRY （ 影响因子：9.8； 五年影响因子：9.7 ）
ISSN： 0308-8146
年卷期： 2025 年 493 卷
页码：
收录情况： SCI
摘要： Camellia ptilophylla, a precious tea variant, has an inferior flavor, possibly related to the specificity of its amino acid composition. In this study, significantly different compositions of amino acids were revealed through systematic analysis of C. ptilophylla and conventional tea, with low theanine but high levels of an unknown amino acid-like substance found in the above-ground parts of C. ptilophylla. Through isolation and structural analysis, the unknown substance was identified for the first time as 4-amino-5-hydroxyvaleric acid (named camptinine). Structural and content correlation analysis suggested that it might be a metabolic product diverted from glutamate, which is related to the decomposition of theanine. Function evaluation showed camptinine had anti-anxiety effect by increasing brain 5-hydroxytryptamine, similar to the positive control of theanine and estazolam, with milder organ impact in mice. This study offers novel insights into tea plant amino acid metabolism, and offers theoretical support for C. ptilophylla product development.
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