Pellach M, Mondal S, Harlos K, Mance D, Baldus M, Gazit E, Shimon LJW. A Two-Tailed Phosphopeptide Crystallizes to Form a Lamellar Structure.
Angew Chem Int Ed Engl 2017;
56:3252-3255. [PMID:
28191715 PMCID:
PMC5412914 DOI:
10.1002/anie.201609877]
[Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Indexed: 11/29/2022]
Abstract
The crystal structure of a designed phospholipid-inspired amphiphilic phosphopeptide at 0.8 Å resolution is presented. The phosphorylated β-hairpin peptide crystallizes to form a lamellar structure that is stabilized by intra- and intermolecular hydrogen bonding, including an extended β-sheet structure, as well as aromatic interactions. This first reported crystal structure of a two-tailed peptidic bilayer reveals similarities in thickness to a typical phospholipid bilayer. However, water molecules interact with the phosphopeptide in the hydrophilic region of the lattice. Additionally, solid-state NMR was used to demonstrate correlation between the crystal structure and supramolecular nanostructures. The phosphopeptide was shown to self-assemble into semi-elliptical nanosheets, and solid-state NMR provides insight into the self-assembly mechanisms. This work brings a new dimension to the structural study of biomimetic amphiphilic peptides with determination of molecular organization at the atomic level.
Collapse