8b4a

Structural highlights

Function

PQSE_PSEAE Required for the biosynthesis of the quorum-sensing signaling molecules 2-heptyl-4(1H)-quinolone (HHQ) and 2-heptyl-3-hydroxy-4(1H)-quinolone (Pseudomonas quinolone signal or PQS), which are important for biofilm formation and virulence. Catalyzes the hydrolysis of the intermediate 2-aminobenzoylacetyl-CoA (2-ABA-CoA) to form 2-aminobenzoylacetate (2-ABA), the precursor of HHQ. In vitro, can also hydrolyze other substrates such as S-ethyl-acetothioacetate and acetoacetyl-CoA, but is inactive against anthraniloyl-CoA, malonyl-CoA and octanoyl-CoA (PubMed:25960261, PubMed:27082157). Beyond its thioesterase function, is involved in the regulation of diverse genes coding for key virulence determinants and biofilm development (PubMed:27851827).^{[1] [2] [3]}

See Also

• Thioesterase 3D structures

References

1. ↑ Drees SL, Fetzner S. PqsE of Pseudomonas aeruginosa Acts as Pathway-Specific Thioesterase in the Biosynthesis of Alkylquinolone Signaling Molecules. Chem Biol. 2015 May 21;22(5):611-8. doi: 10.1016/j.chembiol.2015.04.012. Epub , 2015 May 7. PMID:25960261 doi:http://dx.doi.org/10.1016/j.chembiol.2015.04.012
2. ↑ Zender M, Witzgall F, Drees SL, Weidel E, Maurer CK, Fetzner S, Blankenfeldt W, Empting M, Hartmann RW. Dissecting the Multiple Roles of PqsE in Pseudomonas aeruginosa Virulence by Discovery of Small Tool Compounds. ACS Chem Biol. 2016 Apr 28. PMID:27082157 doi:http://dx.doi.org/10.1021/acschembio.6b00156
3. ↑ Rampioni G, Falcone M, Heeb S, Frangipani E, Fletcher MP, Dubern JF, Visca P, Leoni L, Camara M, Williams P. Unravelling the Genome-Wide Contributions of Specific 2-Alkyl-4-Quinolones and PqsE to Quorum Sensing in Pseudomonas aeruginosa. PLoS Pathog. 2016 Nov 16;12(11):e1006029. doi: 10.1371/journal.ppat.1006029. , eCollection 2016 Nov. PMID:27851827 doi:http://dx.doi.org/10.1371/journal.ppat.1006029