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-Structure paper
タイトル | Eye patches: Protein assembly of index-gradient squid lenses. |
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ジャーナル・号・ページ | Science, Vol. 357, Issue 6351, Page 564-569, Year 2017 |
掲載日 | 2017年8月11日 |
著者 | J Cai / J P Townsend / T C Dodson / P A Heiney / A M Sweeney / |
PubMed 要旨 | A parabolic relationship between lens radius and refractive index allows spherical lenses to avoid spherical aberration. We show that in squid, patchy colloidal physics resulted from an evolutionary ...A parabolic relationship between lens radius and refractive index allows spherical lenses to avoid spherical aberration. We show that in squid, patchy colloidal physics resulted from an evolutionary radiation of globular S-crystallin proteins. Small-angle x-ray scattering experiments on lens tissue show colloidal gels of S-crystallins at all radial positions. Sparse lens materials form via low-valence linkages between disordered loops protruding from the protein surface. The loops are polydisperse and bind via a set of hydrogen bonds between disordered side chains. Peripheral lens regions with low particle valence form stable, volume-spanning gels at low density, whereas central regions with higher average valence gel at higher densities. The proteins demonstrate an evolved set of linkers for self-assembly of nanoparticles into volumetric materials. |
リンク | Science / PubMed:28798124 / PubMed Central |
手法 | SAS (X-ray synchrotron) |
構造データ | SASDCQ5: SASDCR5: SASDCS5: SASDCT5: SASDCU5: SAXS dilution series on ground Doryteuthis squid lens 100% layer |
由来 |
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