Download MendeleyRecombinant expression and solution structure of antimicrobial peptide aurelin from jellyfish Aurelia aurita.
Shenkarev, Z.O., Panteleev, P.V., Balandin, S.V., Gizatullina, A.K., Altukhov, D.A., Finkina, E.I., Kokryakov, V.N., Arseniev, A.S., Ovchinnikova, T.V.(2012) Biochem Biophys Res Commun 429: 63-69
- PubMed: 23137541
- DOI: https://doi.org/10.1016/j.bbrc.2012.10.092
- Primary Citation of Related Structures:
2LG4 - PubMed Abstract:
Aurelin is a 40-residue cationic antimicrobial peptide isolated from the mezoglea of a scyphoid jellyfish Aurelia aurita. Aurelin and its (15)N-labeled analogue were overexpressed in Escherichia coli and purified. Antimicrobial activity of the recombinant peptide was examined, and its spatial structure was studied by NMR spectroscopy. Aurelin represents a compact globule, enclosing one 3(10)-helix and two α-helical regions cross-linked by three disulfide bonds. The peptide binds to anionic lipid (POPC/DOPG, 3:1) vesicles even at physiological salt concentration, it does not interact with zwitterionic (POPC) vesicles and interacts with the DPC micelle surface with moderate affinity via two α-helical regions. Although aurelin shows structural homology to the BgK and ShK toxins of sea anemones, its surface does not possess the "functional dyad" required for the high-affinity interaction with the K(+)-channels. The obtained data permit to correlate the modest antibacterial properties and membrane activity of aurelin.
Organizational Affiliation:
Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, 117997 Moscow, Russia.
