The role of chirality and plastic crystallinity in the optical and mechanical properties of chlorosomes
| Autor: | Li, X., Buda, F., Groot, H.J.M. de, Sevink, G.J.A. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | iScience iScience, Vol 25, Iss 1, Pp 103618-(2022) iScience, 25(1) |
| ISSN: | 2589-0042 |
| Popis: | Summary The most efficient light-harvesting antennae found in nature, chlorosomes, are molecular tubular aggregates (TMAs) assembled by pigments without protein scaffolds. Here, we discuss a classification of chlorosomes as a unique tubular plastic crystal and we attribute the robust energy transfer in chlorosomes to this unique nature. To systematically study the role of supramolecular tube chirality by molecular simulation, a role that has remained unresolved, we share a protocol for generating realistic tubes at atomic resolution. We find that both the optical and the mechanical behavior are strongly dependent on chirality. The optical-chirality relation enables a direct interpretation of experimental spectra in terms of overall tube chirality. The mechanical response shows that the overall chirality regulates the hardness of the tube and provides a new characteristic for relating chlorosomes to distinct chirality. Our protocol also applies to other TMA systems and will inspire other systematic studies beyond lattice models. Graphical abstract Highlights • Classifies chlorosomes in terms of a tubular plastic crystal phase • Clarifies the unique strategy of chlorosomes for harvesting and transporting energy • Presents a protocol for building atom-resolved helical tube structures • Maps tube chirality directly to measurable optical and mechanical responses Chirality in analytical chemistry; Physics; Mechanical property |
| Databáze: | OpenAIRE |
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