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July 7, 2019

Complete genome sequencing of Pandoraea pnomenusa RB38 and molecular characterization of its N-acyl homoserine lactone synthase gene ppnI.

Authors: Lim, Yan-Lue and Ee, Robson and How, Kah-Yan and Lee, Siew-Kim and Yong, Delicia and Tee, Kok Keng and Yin, Wai-Fong and Chan, Kok-Gan

In this study, we sequenced the genome of Pandoraea pnomenusa RB38 using Pacific Biosciences RSII (PacBio) Single Molecule Real Time (SMRT) sequencing technology. A pair of cognate luxI/R homologs was identified where the luxI homolog, ppnI, was found adjacent to a luxR homolog, ppnR1. An additional orphan luxR homolog, ppnR2, was also discovered. Multiple sequence alignment and phylogenetic analysis revealed that ppnI is an N-acyl homoserine lactone (AHL) synthase gene that is distinct from those of the nearest phylogenetic neighbor viz. Burkholderia spp. High resolution tandem mass spectrometry (LC-MS/MS) analysis showed that Escherichia coli BL21 harboring ppnI produced a similar AHL profile (N-octanoylhomoserine lactone, C8-HSL) as P. pnomenusa RB38, the wild-type donor strain, confirming that PpnI directed the synthesis of AHL in P. pnomenusa RB38. To our knowledge, this is the first documentation of the luxI/R homologs of the genus Pandoraea.

Journal: PeerJ
DOI: 10.7717/peerj.1225
Year: 2015

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