# Genomics-Driven Discovery of Plantariitin A, a New Lipopeptide in Burkholderia plantarii DSM9509

## TL;DR

Scientists discovered a new anti-inflammatory lipopeptide, plantariitin A, by activating a silent gene cluster in Burkholderia plantarii using a recombineering system.

## Contribution

The study introduces plantariitin A, a novel lipopeptide containing a unique non-proteinogenic amino acid, produced via in situ activation of a silent BGC in Burkholderia.

## Key findings

- The pla BGC in B. plantarii DSM9509 was activated using the ETh1h2e_yi23 recombineering system.
- Plantariitin A contains a unique amino acid, amino-1,2,3,6-tetrahydro-2,6-dioxo-4-pyrimidinepropanoic acid (ATDPP).
- Plantariitin A exhibits anti-inflammatory biological activity.

## Abstract

A significant number of silent biosynthetic gene clusters (BGCs) within the Burkholderia genome remain uncharacterized, representing a valuable opportunity for the discovery of new natural products. In this research, the recombineering system ETh1h2e_yi23, which facilitates recombination in Burkholderia and was developed in our previous study, was used for mining the BGCs of B. plantarii DSM9509. By using this recombineering system, the constitutive promoter was precisely inserted into the genome, resulting in the activation of the silent pla BGC, which led to the production of a new lipopeptide named plantariitin A. A distinctive characteristic of this lipopeptide is the incorporation of a non-proteinogenic amino acid residue, i.e., amino-1,2,3,6-tetrahydro-2,6-dioxo-4-pyrimidinepropanoic acid (ATDPP), which has not been identified in other natural products. A biological activity assay demonstrated that plantariitin A exhibits anti-inflammatory activity. This study further substantiates the notion that the in situ activation of silent BGCs is a crucial strategy for the discovery of new natural products within the genus Burkholderia. With the increasing availability of genomic data and the development of bioinformatics tools, Burkholderia is poised to emerge as a prominent source for the development of new lipopeptides.