Sulfated phenolic acids from Dasycladales siphonous green algae
作者:Caroline Kurth、Matthew Welling、Georg Pohnert
DOI:10.1016/j.phytochem.2015.07.010
日期:2015.9
Sulfated aromatic acids play a central role as mediators of chemical interactions and physiological processes in marine algae and seagrass. Among others, Dasycladus vermiculans (Scopoli) Krasser 1898 uses a sulfated hydroxylated coumarin derivative as storage metabolite for a protein cross linker that can be activated upon mechanical disruption of the alga. We introduce a comprehensive monitoring technique for sulfated metabolites based on fragmentation patterns in liquid chromatography/mass spectrometry and applied it to Dasycladales. This allowed the identification of two new aromatic sulfate esters 4-(sulfooxy)phenylacetic acid and 4-(sulfooxy)benzoic acid. The two metabolites were synthesized to prove the mass spectrometry-based structure elucidation in co-injections. We show that both metabolites are transformed to the corresponding desulfated phenols by sulfatases of bacteria. In biofouling experiments with Escherichia coli and Vibrio natriegens the desulfated forms were more active than the sulfated ones. Sulfatation might thus represent a measure of detoxification that enables the algae to store inactive forms of metabolites that are activated by settling organisms and then act as defense. (C) 2015 Published by Elsevier Ltd.
US6313247B1
申请人:——
公开号:US6313247B1
公开(公告)日:2001-11-06
[EN] IDENTIFICATION OF EARLY NONINVASIVE BIOMARKERS FOR ALCOHOLIC LIVER DISEASE USING URINARY METABOLOMICS AND THE PPARA-NULL MOUSEI<br/>[FR] IDENTIFICATION DE BIOMARQUEURS NON INVASIFS PRÉCOCES DE L'HÉPATITE ALCOOLIQUE À L'AIDE DE LA MÉTABOLOMIQUE URINAIRE ET DE LA SOURIS I PPAR?-NULL
申请人:US GOV HEALTH & HUMAN SERV
公开号:WO2013010093A1
公开(公告)日:2013-01-17
The invention provides novel biomarkers for alcoholic liver disease.