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Pathway Description
2-Heptyl-3-hydroxy-quinolone (PQS) biosynthesis
Pseudomonas aeruginosa
Metabolic Pathway
2-Heptyl-3-hydroxy-4-quinolone (PQS) is key to quorum sensing and virulence in bacteria like Pseudomonas aeruginosa PAO1. This biosynthesis begins with the precursor chorismate, which is derived from the shikimate pathway during the biosynthesis of aromatic amino acids e.g., phenylalanine, tyrosine and tryptophan. Chorismate is converted into anthranilate by anthranilate synthase, then into Anthraniloyl-CoA. The subsequent steps involve the action of enzymes 3-oxoacyl-ACP synthase, thioesterase PqsE, and 2-heptyl-4(1H)-quinolone synthase, which facilitate the conversion of Anthraniloyl-CoA to 2-heptyl-4(1H)-quinolone (HHQ), the direct precursor of PQS. Finally, 2-heptyl-3-hydroxy-4(1H)-quinolone synthase hydroxylates HHQ to produce PQS thus linking primary metabolism to secondary metanolism, significant to microbial communication and adaptation.
References
2-Heptyl-3-hydroxy-quinolone (PQS) biosynthesis References
Diggle SP, Matthijs S, Wright VJ, Fletcher MP, Chhabra SR, Lamont IL, et al. The Pseudomonas aeruginosa 4-Quinolone Signal Molecules HHQ and PQS Play Multifunctional Roles in Quorum Sensing and Iron Entrapment. Chemistry & Biology. 2007;14(1):87-96.
Kanehisa, M., 2002, November. The KEGG database. In ‘In silico’simulation of biological processes: Novartis Foundation Symposium 247 (Vol. 247, pp. 91-103). Chichester, UK: John Wiley & Sons, Ltd.
UniProt Consortium, 2019. UniProt: a worldwide hub of protein knowledge. Nucleic acids research, 47(D1), pp.D506-D515.
Kim, S., Thiessen, P.A., Bolton, E.E., Chen, J., Fu, G., Gindulyte, A., Han, L., He, J., He, S., Shoemaker, B.A. and Wang, J., 2016. PubChem substance and compound databases. Nucleic acids research, 44(D1), pp.D1202-D1213.
de Matos, P., Adams, N., Hastings, J., Moreno, P. and Steinbeck, C., 2012. A database for chemical proteomics: ChEBI. Chemical Proteomics: Methods and Protocols, pp.273-296.
This pathway was propagated using PathWhiz -
Pon, A. et al. Pathways with PathWhiz (2015) Nucleic Acids Res. 43(Web Server issue): W552–W559.
Propagated from PW248313
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