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Bacterial Alkaloid Biosynthesis: Structural Diversity via a Minimalistic Nonribosomal Peptide Synthetase.

Cell chemical biology (2018-04-03)
Martin Klapper, Daniel Braga, Gerald Lackner, Rosa Herbst, Pierre Stallforth
ABSTRACT

Chemical and biochemical analyses of one of the most basic nonribosomal peptide synthetases (NRPS) from a Pseudomonas fluorescens strain revealed its striking plasticity. Determination of the potential substrate scope enabled us to anticipate novel secondary metabolites that could subsequently be isolated and tested for their bioactivities. Detailed analyses of the monomodular pyreudione synthetase showed that the biosynthesis of the bacterial pyreudione alkaloids does not require additional biosynthetic enzymes. Heterologous expression of a similar and functional, yet cryptic, NRPS of Pseudomonas entomophila was successful and allowed us to perform a phylogenetic analysis of their thioesterase domains.

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