Transcriptomic analysis reveals a novel LysR regulator's role in Burkholderia pseudomallei host-pathogen interaction

Area of Science:

• Microbiology
• Molecular Biology
• Genetics

Background:

• Burkholderia pseudomallei causes melioidosis, a severe disease in Southeast Asia.
• LysR-type transcriptional regulators (LTTRs) are vital for bacterial functions but many are uncharacterized.

Purpose of the Study:

• To investigate the function of a novel LTTR, UKMD286_5923, in B. pseudomallei pathogenesis.
• To understand the regulatory role of UKMD286_5923 in bacterial survival and host-pathogen interactions.

Main Methods:

• Construction of a B. pseudomallei UKMD286 deletion mutant for UKMD286_5923.
• Transcriptomic analysis using RNA sequencing to identify differentially expressed genes.
• Phenotypic assays including biofilm formation and plaque assays.

Main Results:

• Deletion of UKMD286_5923 resulted in 67 differentially expressed genes, affecting metabolism, transport, and secretion.
• The mutant showed increased biofilm production, indicating enhanced bacterial adhesion.
• The mutant exhibited reduced plaque formation, suggesting impaired host cell invasion.

Conclusions:

• UKMD286_5923 is a key regulator influencing B. pseudomallei virulence factors, including Type III secretion system components.
• Understanding UKMD286_5923 function offers insights into melioidosis pathogenesis.
• This regulator may be a target for future melioidosis diagnostic and treatment strategies.