Insights into 6‐Methylsalicylic Acid Bio‐assembly by Using Chemical Probes

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Parascandolo, James S. ; Havemann, Judith ; Potter, Helen K. ; Huang, Fanglu ; Riva, Elena ; Connolly, Jack ; Wilkening, Ina ; Song, Lijiang ; Leadlay, Peter F. ; Tosin, Manuela (2016)
  • Publisher: John Wiley and Sons Inc.
  • Journal: Angewandte Chemie (International Ed. in English), volume 55, issue 10, pages 3,463-3,467 (issn: 1433-7851, eissn: 1521-3773)
  • Related identifiers: pmc: PMC4797705, pmc: PMC4950124, doi: 10.1002/ange.201509038, doi: 10.1002/anie.201509038
  • Subject: Iterative Polyketidkatalyse | Communications | Zuschrift | Zuschriften | iterative polyketide catalysis | chemical probes | Chemische Sonden | Communication | QP | dehydratase

Abstract Chemical probes capable of reacting with KS (ketosynthase)‐bound biosynthetic intermediates were utilized for the investigation of the model type I iterative polyketide synthase 6‐methylsalicylic acid synthase (6‐MSAS) in vivo and in vitro. From the fermentation of fungal and bacterial 6‐MSAS hosts in the presence of chain termination probes, a full range of biosynthetic intermediates was isolated and characterized for the first time. Meanwhile, in vitro studies of recombinant 6‐MSA synthases with both nonhydrolyzable and hydrolyzable substrate mimics have provided additional insights into substrate recognition, providing the basis for further exploration of the enzyme catalytic activities.