Download MendeleyC-N bond formation by a polyketide synthase.
Wang, J., Wang, X., Li, X., Kong, L., Du, Z., Li, D., Gou, L., Wu, H., Cao, W., Wang, X., Lin, S., Shi, T., Deng, Z., Wang, Z., Liang, J.(2023) Nat Commun 14: 1319-1319
- PubMed: 36899013
- DOI: https://doi.org/10.1038/s41467-023-36989-w
- Primary Citation of Related Structures:
7WVZ, 8I4Y, 8I4Z - PubMed Abstract:
Assembly-line polyketide synthases (PKSs) are molecular factories that produce diverse metabolites with wide-ranging biological activities. PKSs usually work by constructing and modifying the polyketide backbone successively. Here, we present the cryo-EM structure of CalA3, a chain release PKS module without an ACP domain, and its structures with amidation or hydrolysis products. The domain organization reveals a unique "∞"-shaped dimeric architecture with five connected domains. The catalytic region tightly contacts the structural region, resulting in two stabilized chambers with nearly perfect symmetry while the N-terminal docking domain is flexible. The structures of the ketosynthase (KS) domain illustrate how the conserved key residues that canonically catalyze C-C bond formation can be tweaked to mediate C-N bond formation, revealing the engineering adaptability of assembly-line polyketide synthases for the production of novel pharmaceutical agents.
Organizational Affiliation:
State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
