Quorum sensing activity in Pandoraea pnomenusa RB38

Area of Science:

• Microbiology
• Bacterial communication
• Environmental microbiology

Background:

• Quorum sensing (QS) is a cell-to-cell communication mechanism used by bacteria.
• N-acyl homoserine lactones (AHLs) are common QS signal molecules in Gram-negative bacteria.
• Identifying novel QS molecules and producers is crucial for understanding bacterial behavior.

Purpose of the Study:

• To identify and characterize a bacterial strain isolated from a former dumping area in Malaysia.
• To investigate the quorum sensing capabilities of the identified strain.
• To determine the specific N-acyl homoserine lactone molecules produced by the strain.

Main Methods:

• Bacterial isolation and identification using MALDI-TOF mass spectrometry and genomic analysis.
• Assessment of quorum sensing properties using various biosensors.
• Characterization of N-acyl homoserine lactone production profile via high-resolution triple quadrupole liquid chromatography-mass spectrometry.

Main Results:

• Strain RB38 was identified as Pandoraea pnomenusa.
• The strain exhibited confirmed quorum sensing properties.
• High-resolution liquid chromatography-mass spectrometry analysis revealed the production of N-octanoyl homoserine lactone by strain RB38.

Conclusions:

• Pandoraea pnomenusa strain RB38 produces the quorum sensing molecule N-octanoyl homoserine lactone.
• This finding represents the first report of N-octanoyl homoserine lactone production by this specific bacterial isolate.
• The study contributes to the understanding of quorum sensing mechanisms in environmental bacteria.