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Título

Deciphering the melatonin metabolism in Saccharomyces cerevisiae by the bioconversion of related metabolites

AutorMuñiz Calvo, Sara CSIC ORCID; Bisquert, Ricardo CSIC ORCID; Fernández-Cruz, E.; García-Parrilla, M. Carmen; Guillamón, José Manuel CSIC ORCID
Palabras claveBioconversiones
Indole biosynthesis pathway
Indolic compounds
Melatonin metabolism
Substrate pulses
Yeast
Fecha de publicación11-ene-2019
EditorJohn Wiley & Sons
CitaciónJournal of Pineal Research 66 (3): E12554 (2019)
ResumenMelatonin (Mel), originally considered a neurohormone, has been detected in beverages and food‐fermented products in which yeast metabolism is highly important. This indolamine is synthesized from serotonin, with L‐tryptophan being the initial substrate of both. Regarding Mel metabolism, the biosynthetic pathway in mammals consists in four‐step reactions. However, six genes are implicated in the synthesis of Mel in plants, which suggest the presence of many pathways. The aim of this study was to provide new empirical data on the production of Mel and other indole‐related compounds in the yeast Saccharomyces cerevisiae (S. cerevisiae). To this end, we performed the addition of the pathway intermediates in S. cerevisiae cells in different growth stages (exponential and arrested cells) to follow the bioconversion and new indolic compound production from them. The different bioconverted indolic compounds tested (L‐tryptophan, 5‐hydroxytryptophan, tryptamine, serotonin, N‐acetylserotonin, 5‐methoxytryptamine, and Mel) were analyzed by UHPLC‐MS/MS from the extra‐ and intracellular contents. Our results showed that serotonin, in yeast, was prevalently formed via tryptophan decarboxylation, followed by tryptamine hydroxylation as in plants. Mel production from serotonin can be achieved by either N‐acetylation, followed by O‐methylation or O‐methylation, in turn followed by N‐acetylation. Accordingly, the classic pathway of Mel synthesis in vertebrates does not seems prevalent in yeast.
URIhttp://hdl.handle.net/10261/206083
DOI10.1111/jpi.12554
ISSN0742-3098
E-ISSN1600-079X
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