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-Structure paper
| タイトル | De novo design of quasisymmetric two-component protein cages. |
|---|---|
| ジャーナル・号・ページ | Nature, Year 2026 |
| 掲載日 | 2026年5月20日 |
著者 | Shunzhi Wang / Ying Xie / David Chmielewski / Connor Weidle / Tong Shu / Green Ahn / Ryan D Kibler / Cindy Hernandez / Wei Chen / David Camilo Duran / Ann Carr / Asim K Bera / Sangmin Lee / Justin Decarreau / Alex Kang / Evans Brackenbrough / Emily Joyce / Kejia Wu / Andrew J Borst / Andrew Favor / Buwei Huang / Frank DiMaio / Liam J Holt / David Baker / ![]() |
| PubMed 要旨 | Quasisymmetric icosahedral viral capsids achieve larger sizes than possible with strictly symmetric icosahedra by tessellating pentagons and hexagons using a single subunit that adopts different ...Quasisymmetric icosahedral viral capsids achieve larger sizes than possible with strictly symmetric icosahedra by tessellating pentagons and hexagons using a single subunit that adopts different conformations in symmetrically non-equivalent locations. Recapitulating such quasisymmetric architectures through computational design is a considerable challenge in nanomaterials engineering. Here we introduce a computational design strategy based on geometric frustration to generate two-component, quasisymmetric protein cages with customizable properties. We designed complementary trimeric and dimeric protein components that co-assemble into positively curved local hexagonal assemblies. Hexagonal lattices cannot tile spherical surfaces; instead, the components form closed sphere-like cage assemblies through incorporation of curvature-inducing pentagonal defects, as evidenced by electron microscopy. By designing dimers that encode different local curvatures, we programmed cage dimensions ranging from 40 to over 200 nm in diameter and with molecular weights from 2 MDa to over 50 MDa, comparable with natural virus capsids. We further functionalized these large cages with additional protein domains to enable ribonucleoprotein cargo loading and cellular uptake. Fluorescently labelled cage assemblies expressed in mammalian cells function as rheological probes and cargo recruiters, enabling a systematic study of size-dependent cytoplasmic diffusion and protein localization. Thus, the quasi-symmetry that has long fascinated structural biologists can now be achieved by computational protein design, with immediate applications to biologics delivery and molecular cell biology. |
リンク | Nature / PubMed:42162421 |
| 手法 | EM (単粒子) / EM (サブトモグラム平均) / X線回折 |
| 解像度 | 2.15 - 31.6 Å |
| 構造データ | EMDB-70605, PDB-9om3: EMDB-70685, PDB-9op9: ![]() PDB-9ndl: |
| 化合物 | ![]() ChemComp-HOH: |
| 由来 |
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キーワード | DE NOVO PROTEIN / design model / ML/AI / quasi symmetry / nanoparticles / Goldberg icosahedron / C60 / Fullerene |
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