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-Structure paper
タイトル | Structural analysis of cross α-helical nanotubes provides insight into the designability of filamentous peptide nanomaterials. |
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ジャーナル・号・ページ | Nat Commun, Vol. 12, Issue 1, Page 407, Year 2021 |
掲載日 | 2021年1月18日 |
著者 | Fengbin Wang / Ordy Gnewou / Charles Modlin / Leticia C Beltran / Chunfu Xu / Zhangli Su / Puneet Juneja / Gevorg Grigoryan / Edward H Egelman / Vincent P Conticello / |
PubMed 要旨 | The exquisite structure-function correlations observed in filamentous protein assemblies provide a paradigm for the design of synthetic peptide-based nanomaterials. However, the plasticity of ...The exquisite structure-function correlations observed in filamentous protein assemblies provide a paradigm for the design of synthetic peptide-based nanomaterials. However, the plasticity of quaternary structure in sequence-space and the lability of helical symmetry present significant challenges to the de novo design and structural analysis of such filaments. Here, we describe a rational approach to design self-assembling peptide nanotubes based on controlling lateral interactions between protofilaments having an unusual cross-α supramolecular architecture. Near-atomic resolution cryo-EM structural analysis of seven designed nanotubes provides insight into the designability of interfaces within these synthetic peptide assemblies and identifies a non-native structural interaction based on a pair of arginine residues. This arginine clasp motif can robustly mediate cohesive interactions between protofilaments within the cross-α nanotubes. The structure of the resultant assemblies can be controlled through the sequence and length of the peptide subunits, which generates synthetic peptide filaments of similar dimensions to flagella and pili. |
リンク | Nat Commun / PubMed:33462223 / PubMed Central |
手法 | EM (らせん対称) |
解像度 | 3.8 - 4.4 Å |
構造データ | EMDB-21812, PDB-6wkx: EMDB-21813, PDB-6wky: EMDB-21814, PDB-6wl0: EMDB-21815, PDB-6wl1: EMDB-21816, PDB-6wl7: EMDB-21817, PDB-6wl8: EMDB-21818, PDB-6wl9: |
由来 |
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キーワード | PROTEIN FIBRIL / filament / self-assembly peptide filament / Cryo-EM |