Question

Do the quorum-sensing signals produced by P. aeruginosa differ from those produced by S. aureus? if so, how?

Answer 1

# Quorum sensing is the regulation of gene expression due to fluctuations in the cell population density. Quorum sensing bacteria produce and release chemical molecules which are called as autoinducers. These inducers alter the gene expression even in minimal quantity.

Gram negative and Gram positive bacteria have different sets of quorom sensing signals due to their diverse physiological activities. Gram negative bacteria use acetylated homoserine lactones as inducers. Gram positive bacteria use processed oligo peptides as auto inducers.

Therefore, quorum signals produced by P. aeruginosa (Gram negative bacteria) differs from those produced by S.aureus (Gram postive).