Download MendeleyStructure and Conformational Variability of the Mycobacterium Tuberculosis Fatty Acid Synthase Multienzyme Complex.
Ciccarelli, L., Connell, S.R., Enderle, M., Mills, D.J., Vonck, J., Grininger, M.(2013) Structure 21: 1251
- PubMed: 23746808
- DOI: https://doi.org/10.1016/j.str.2013.04.023
- Primary Citation of Related Structures:
4V8V, 4V8W - PubMed Abstract:
Antibiotic therapy in response to Mycobacterium tuberculosis infections targets de novo fatty acid biosynthesis, which is orchestrated by a 1.9 MDa type I fatty acid synthase (FAS). Here, we characterize M. tuberculosis FAS by single-particle cryo-electron microscopy and interpret the data by docking the molecular models of yeast and Mycobacterium smegmatis FAS. Our analysis reveals a porous barrel-like structure of considerable conformational variability that is illustrated by the identification of several conformational states with altered topology in the multienzymatic assembly. This demonstrates that the barrel-like structure of M. tuberculosis FAS is not just a static scaffold for the catalytic domains, but may play an active role in coordinating fatty acid synthesis. The conception of M. tuberculosis FAS as a highly dynamic assembly of domains revises the view on bacterial type I fatty acid synthesis and might inspire new strategies for inhibition of de novo fatty acid synthesis in M. tuberculosis.
Organizational Affiliation:
Department of Structural Biology, Max-Planck-Institute of Biophysics, Max-von-Laue-Str. 3, 60438 Frankfurt, Germany.
