Chemical probes for competitive profiling of the quorum sensing signal synthase PqsD of Pseudomonas aeruginosa.

ABSTRACT: The human pathogen Pseudomonas aeruginosa uses the pqs quorum sensing system to coordinate the production of its broad spectrum of virulence factors to facilitate colonization and infection of its host. Hereby, the enzyme PqsD is a virulence related quorum sensing signal synthase that catalyzes the central step in the biosynthesis of the Pseudomonas quinolone signals HHQ and PQS. We developed a library of cysteine reactive chemical probes with an alkyne handle for fluorescence tagging and report the selective and highly sensitive in vitro labelling of the active site cysteine of this important enzyme. Interestingly, only one type of probe, with a reactive α-chloroacetamide was capable of covalently reacting with the active site. We demonstrated the potential of our pro

SUBMITTER: Prothiwa M 

PROVIDER: S-EPMC5238532 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature