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Rhodiola chrysanthemifolia and Rhodiola kirilowii

ABSTRACT: Analysis of key enzyme candidate genes in the the synthetic pathway of salidroside.

PROVIDER: PRJNA981677 | ENA |

REPOSITORIES: ENA

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Complete pathway elucidation and heterologous reconstitution of Rhodiola salidroside biosynthesis

Project description:Salidroside is a bioactive tyrosine-derived phenolic natural product found in medicinal plants under the Rhodiola genus. In addition to their roles in traditional medicine as anti-fatigue and anti-anoxia adaptogens, Rhodiola total extract and salidroside have also displayed medicinal properties as anti-cardiovascular diseases and anti-cancer agents. The resulting surge in global demand of Rhodiola plants and salidroside has driven some species close to extinction. Here, we report the full elucidation of Rhodiola salidroside biosynthetic pathway utilizing the first comprehensive transcriptomics and metabolomics datasets for Rhodiola rosea. Unlike the previously proposed pathway involving separate decarboxylation and deamination enzymatic steps from tyrosine to the key intermediate 4-hydroxyphenylacetaldehyde, Rhodiola contains a pyridoxal phosphate (PLP)-dependent 4-hydroxyphenylacetaldehyde synthase (4HPAAS) that directly converts tyrosine to 4-hydroxyphenylacetaldehyde. We further identified genes encoding the subsequent 4-hydroxyphenylacetaldehyde reductase (4HPAR) and tyrosol:UDP-glucose 8-O- glucosyltransferase (T8GT), respectively, to complete salidroside biosynthesis in Rhodiola. We show that heterologous production of salidroside can be achieved in yeast Saccharomyces cerevisiae as well as in plant Nicotiana benthamiana through transgenic expression of Rhodiola salidroside biosynthetic genes. This study provides new tools for engineering sustainable production of salidroside in heterologous hosts.

2018-01-25 | MTBLS566 | MetaboLights

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