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Abstract Synthetic methylotrophy offers opportunities for sustainable chemical and biofuel production. While recently established methylotrophic E. coli can grow on methanol, undesirable formate accumulation occurs during growth and bioproduction. Here, we show that NAD-dependent methanol dehydrogenase Mdh2 from Cupriavidus necator inherently overoxidizes methanol to formate, a trait we find to be widespread among NAD-dependent Mdh enzymes.
Abstract Indole is an important biomolecule in plants, essential for amino acid biosynthesis, defense, pollinator attraction and plant–plant communication. Its biosynthesis is reported to be catalyzed by standalone indole-3-glycerol phosphate lyases, which are, however, absent in core eudicots. Here we show that, in core eudicots, indole production for defense and signaling occurs through an alternative pathway.
Abstract Indole is crucial for plant defense, where it is released as a signaling volatile upon herbivore attack and also serves as a starting precursor for defensive specialized metabolites. Indole is known to be synthesized in plants from indole-3-glycerol phosphate by the enzyme indole-3-glycerol phosphate lyase. Here we report that in core eudicots, indole production for plant defense occurs via an alternative pathway.
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