Download MendeleyStructure and interaction with phospholipids of a prokaryotic lipoxygenase from Pseudomonas aeruginosa.
Garreta, A., Val-Moraes, S.P., Garcia-Fernandez, Q., Busquets, M., Juan, C., Oliver, A., Ortiz, A., Gaffney, B.J., Fita, I., Manresa, A., Carpena, X.(2013) FASEB J 27: 4811-4821
- PubMed: 23985801
- DOI: https://doi.org/10.1096/fj.13-235952
- Primary Citation of Related Structures:
4G32, 4G33 - PubMed Abstract:
Lipoxygenases (LOXs), which are essential in eukaryotes, have no confirmed function in prokaryotes that are devoid of polyunsaturated fatty acids. The structure of a secretable LOX from Pseudomonas aeruginosa (Pa_LOX), the first available from a prokaryote, presents significant differences with respect to eukaryotic LOXs, including a cluster of helices acting as a lid to the active center. The mobility of the lid and the structural variability of the N-terminal region of Pa_LOX was confirmed by comparing 2 crystal forms. The binding pocket contains a phosphatidylethanolamine phospholipid with branches of 18 (sn-1) and 14/16 (sn-2) carbon atoms in length. Carbon atoms from the sn-1 chain approach the catalytic iron in a manner that sheds light on how the enzymatic reaction might proceed. The findings in these studies suggest that Pa_LOX has the capacity to extract and modify unsaturated phospholipids from eukaryotic membranes, allowing this LOX to play a role in the interaction of P. aeruginosa with host cells.
Organizational Affiliation:
1Institut de Biologia Molecular, Parc Científic de Barcelona, Baldiri Reixac 10, 08028 Barcelona, Spain. xcvcri@ibmb.csic.es.
