Assembly of a photosynthetic reaction center with ABA tri-block polymersomes: highlights on protein localization
| Autor: | Tangorra, R. R., Operamolla, A., Milano, F., Omar, O. Hassan, Henrard, J., Comparelli, R., Italiano, F., Agostiano, A., De Leo, V., Marotta, R., Falqui, A., Farinola, G. M., Trotta, M. |
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| Rok vydání: | 2015 |
| Předmět: |
Liposome
Polymers Chemistry Vesicle Photosynthetic Reaction Center Complex Proteins Size-exclusion chromatography Membranes Artificial Rhodobacter sphaeroides Protein subcellular localization prediction Transport protein Kinetics Protein Transport Biochemistry parasitic diseases Polymersome Biophysics na Physical and Theoretical Chemistry Lipid bilayer Hydrophobic and Hydrophilic Interactions Integral membrane protein |
| Zdroj: | ResearcherID Photochemical & photobiological sciences 14 (2015): 1844–1852. doi:10.1039/c5pp00189g info:cnr-pdr/source/autori:Tangorra, R. R.; Operamolla, A.; Milano, F.; Omar, O. Hassan; Henrard, J.; Comparelli, R.; Italiano, F.; Agostiano, A.; Agostiano, A.; De Leo, V.; Marotta, R.; Falqui, A.; Farinola, G. M.; Farinola, G. M.; Trotta, M./titolo:Assembly of a photosynthetic reaction center with ABA tri-block polymersomes: Highlights on protein localization/doi:10.1039%2Fc5pp00189g/rivista:Photochemical & photobiological sciences (Print)/anno:2015/pagina_da:1844/pagina_a:1852/intervallo_pagine:1844–1852/volume:14 |
| ISSN: | 1474-9092 1474-905X |
| DOI: | 10.1039/c5pp00189g |
| Popis: | The reconstitution of the integral membrane protein photosynthetic reaction center (RC) in polymersomes, i.e. artificial closed vesicles, was achieved by the micelle-to-vesicle transition technique, a very mild protocol based on size exclusion chromatography often used to drive the incorporation of proteins contemporarily to liposome formation. An optimized protocol was used to successfully reconstitute the protein in a fully active state in polymersomes formed by the tri-block copolymers PMOXA22-PDMS61-PMOXA22. The RC is very sensitive to its solubilizing environment and was used to probe the positioning of the protein in the vesicles. According to charge-recombination experiments and to the enzymatic activity assay, the RC is found to accommodate in the PMOXA22 region of the polymersome, facing the water bulk solution, rather than in the PDMS61 transmembrane-like region. Furthermore, polymersomes were found to preserve protein integrity efficiently as the biomimetic lipid bilayers but show a much longer temporal stability than lipid based vesicles. |
| Databáze: | OpenAIRE |
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