Download MendeleyFeeM, an N-Acyl Amino Acid Synthase from an Uncultured Soil Microbe: Structure, Mechanism, and Acyl Carrier Protein Binding.
Van Wagoner, R.M., Clardy, J.(2006) Structure 14: 1425-1435
- PubMed: 16962973
- DOI: https://doi.org/10.1016/j.str.2006.07.005
- Primary Citation of Related Structures:
2G0B - PubMed Abstract:
Attempts to access antibiotics by capturing biosynthetic genes and pathways directly from environmental DNA, which is overwhelmingly derived from uncultured bacteria, have revealed a large and previously unknown family of N-acyl amino acid synthases (NASs). The structure of the NAS FeeM reveals structural similarity to the GCN5-related N-acyl transferases and acylhomoserine lactone synthases. The overall structure has a central beta sheet with alpha helices on both sides. A bound product at a cleft in the beta sheet identifies the active site and the structural basis for catalysis, and sequence conservation in this region indicates a bias for recognition over speed. FeeM interacts with an acyl carrier protein (FeeL), and the structure, mutagenesis, and enzymatic measurements reveal that a small hydrophobic pocket in alpha helix 5 dominates binding of FeeM to FeeL. The structural and mechanistic analyses suggest that the products of FeeM could be bacterial signaling agents.
Organizational Affiliation:
Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA.
