Download MendeleyAntimicrobial peptide protegrin-3 adopt an antiparallel dimer in the presence of DPC micelles: a high-resolution NMR study.
Usachev, K.S., Efimov, S.V., Kolosova, O.A., Klochkova, E.A., Aganov, A.V., Klochkov, V.V.(2015) J Biomol NMR 62: 71-79
- PubMed: 25786621
- DOI: https://doi.org/10.1007/s10858-015-9920-0
- Primary Citation of Related Structures:
2MZ6 - PubMed Abstract:
A tendency to dimerize in the presence of lipids was found for the protegrin. The dimer formation by the protegrin-1 (PG-1) is the first step for further oligomeric membrane pore formation. Generally there are two distinct model of PG-1 dimerization in either a parallel or antiparallel β-sheet. But despite the wealth of data available today, protegrin dimer structure and pore formation is still not completely understood. In order to investigate a more detailed dimerization process of PG-1 and if it will be the same for another type of protegrins, in this work we used a high-resolution NMR spectroscopy for structure determination of protegrin-3 (RGGGL-CYCRR-RFCVC-VGR) in the presence of perdeuterated DPC micelles and demonstrate that PG-3 forms an antiparallel NCCN dimer with a possible association of these dimers. This structural study complements previously published solution, solid state and computational studies of PG-1 in various environments and validate the potential of mean force simulations of PG-1 dimers and association of dimers to form octameric or decameric β-barrels.
Organizational Affiliation:
NMR Laboratory, Institute of Physics, Kazan Federal University, Kremlevskaya, 18, Kazan, 420008, Russian Federation, k.usachev@kpfu.ru.
