Download MendeleyA close look at a ketosynthase from a trans-acyltransferase modular polyketide synthase.
Gay, D.C., Gay, G., Axelrod, A.J., Jenner, M., Kohlhaas, C., Kampa, A., Oldham, N.J., Piel, J., Keatinge-Clay, A.T.(2014) Structure 22: 444-451
- PubMed: 24508341
- DOI: https://doi.org/10.1016/j.str.2013.12.016
- Primary Citation of Related Structures:
4NA1, 4NA2, 4NA3 - PubMed Abstract:
The recently discovered trans-acyltransferase modular polyketide synthases catalyze the biosynthesis of a wide range of bioactive natural products in bacteria. Here we report the structure of the second ketosynthase from the bacillaene trans-acyltransferase polyketide synthase. This 1.95 Å resolution structure provides the highest resolution view available of a modular polyketide synthase ketosynthase and reveals a flanking subdomain that is homologous to an ordered linker in cis-acyltransferase modular polyketide synthases. The structure of the cysteine-to-serine mutant of the ketosynthase acylated by its natural substrate provides high-resolution details of how a native polyketide intermediate is bound and helps explain the basis of ketosynthase substrate specificity. The substrate range of the ketosynthase was further investigated by mass spectrometry.
Organizational Affiliation:
Department of Molecular Biosciences, The University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA.
