De novo biosynthesis of linalool from glucose in engineered Escherichia coli.

Linalool is an important terpenoids of floral scents and has wide applications. In the past, several groups reported on a strategy to establish biosynthesis of linalool in yeast based on co-expression of Saccharomyces cerevisiae farnesyl diphosphate synthase ERG20 and Actinidia arguta linalool synthase LIS. However, ERG20 has both geranyl diphosphate synthase and farnesyl diphosphate synthase activities, which can lead to metabolic flow to farnesyl diphosphate. In this study, a heterologous linalool biosynthesis pathway was constructed in Escherichia coli and showed that using Abies grandis geranyl diphosphate synthase GPPS2 instead of ERG20 can effectively improve linalool biosynthesis. Subsequently, we further improved the biosynthesis of linalool by overexpression of isopentenyl diphosphate isomerase Idi.