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Insights into 6‐Methylsalicylic Acid Bio‐assembly by Using Chemical Probes
Author(s) -
Parascandolo James S.,
Havemann Judith,
Potter Helen K.,
Huang Fanglu,
Riva Elena,
Connolly Jack,
Wilkening Ina,
Song Lijiang,
Leadlay Peter F.,
Tosin Manuela
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201509038
Subject(s) - polyketide synthase , chemistry , substrate (aquarium) , polyketide , enzyme , biochemistry , in vitro , stereochemistry , atp synthase , fermentation , substrate specificity , biosynthesis , combinatorial chemistry , biology , ecology
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.