title: Quantum-dot-induced self-assembly of cricoid protein for light harvesting.
abstract: Stable protein one (SP1) has been demonstrated as an appealing building block to design highly ordered architectures, despite the hybrid assembly with other nano-objects still being a challenge. Herein, we developed a strategy to construct high-ordered protein nanostructures by electrostatic self-assembly of cricoid protein nanorings and globular quantum dots (QDs). Using multielectrostatic interactions between 12mer protein nanoring SP1 and oppositely charged CdTe QDs, highly ordered nanowires with sandwich structure were achieved by hybridized self-assembly. QDs with different sizes (QD1, 3-4 nm; QD2, 5-6 nm; QD3, ∼10 nm) would induce the self-assembly protein rings into various nanowires, subsequent bundles, and irregular networks in aqueous solution. Atomic force microscopy, transmission electron microscopy, and dynamic light scattering characterizations confirmed that the size of QDs and the structural topology of the nanoring play critical functions in the formation of the superstructures. Furthermore, an ordered arrangement of QDs provides an ideal scaffold for designing the light-harvesting antenna. Most importantly, when different sized QDs (e.g., QD1 and QD3) self-assembled with SP1, an extremely efficient Förster resonance energy transfer was observed on these protein nanowires. The self-assembled protein nanostructures were demonstrated as a promising scaffold for the development of an artificial light-harvesting system.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Miao
authors.forename: Jishu
authors.initials: J
authors.lastname: Han
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.forename: Linlu
authors.initials: L
authors.lastname: Zhao
authors.forename: Chengye
authors.initials: C
authors.lastname: Si
authors.forename: Xiyu
authors.initials: X
authors.lastname: Zhang
authors.forename: Chunxi
authors.initials: C
authors.lastname: Hou
authors.forename: Quan
authors.initials: Q
authors.lastname: Luo
authors.forename: Jiayun
authors.initials: J
authors.lastname: Xu
authors.forename: Junqiu
authors.initials: J
authors.lastname: Liu
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D031541:Fluorescence Resonance Energy Transfer; D008027:Light; D008958:Models, Molecular; D011487:Protein Conformation; D011506:Proteins / Q000737:chemistry*; D045663:Quantum Dots / Q000737:chemistry*; D055672:Static Electricity; D013691:Tellurium / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D011506:Proteins; D013691:Tellurium; C028337:cadmium telluride