UPLC-MSE Profiling of Phytoplankton Metabolites: Application to the Identification of Pigments and Structural Analysis of Metabolites in Porphyridium purpureum

Marine Drugs

Camille Juin¹  Antoine Bonnet²  Elodie Nicolau³  Jean-Baptiste Bérard³  Romain Devillers¹  Valérie Thiéry¹  Jean-Paul Cadoret³  Laurent Picot¹ 

[1] University of La Rochelle, UMRi CNRS 7266 LIENSs, 17042 La Rochelle, France; E-Mails:;Platform for the High Resolution Analysis of Biomolecules, University of La Rochelle, UMRi CNRS 7266 LIENSs, 17042 La Rochelle, France; E-Mail:;IFREMER, Laboratory BRM/PBA, Rue de l’Ile d’Yeu, 44311 Nantes, France; E-Mails:

关键词: carotenoid;    chlorophyll;    dereplication;    divinyl chlorophyll a;    galactosyldiacylglycerol;    gracilamide;    mass spectrometry;    MS^E;    phytoplankton;    pigment;    Porphyridium purpureum;    UPLC;   

DOI  :  10.3390/md13042541

来源: mdpi

【 摘 要 】

A fast and high-resolution UPLC-MS^E analysis was used to identify phytoplankton pigments in an ethanol extract of Porphyridium purpureum (Pp) devoid of phycobiliproteins. In a first step, 22 standard pigments were analyzed by UPLC-MS^E to build a database including retention time and accurate masses of parent and fragment ions. Using this database, seven pigments or derivatives previously reported in Pp were unequivocally identified: β,β-carotene, chlorophyll a, zeaxanthin, chlorophyllide a, pheophorbide a, pheophytin a, and cryptoxanthin. Minor amounts of Divinyl chlorophyll a, a chemotaxonomic pigment marker for prochlorophytes, were also unequivocally identified using the database. Additional analysis of ionization and fragmentation patterns indicated the presence of ions that could correspond to hydroxylated derivatives of chlorophyll a and pheophytin a, produced during the ethanolic extraction, as well as previously described galactosyldiacylglycerols, the thylakoid coenzyme plastoquinone, and gracilamide B, a molecule previously reported in the red seaweed Gracillaria asiatica. These data point to UPLC-MS^E as an efficient technique to identify phytoplankton pigments for which standards are available, and demonstrate its major interest as a complementary method for the structural elucidation of ionizable marine molecules.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.