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doi:10.22028/D291-41462
Titel: | Hydrophobin Bilayer as Water Impermeable Protein Membrane |
VerfasserIn: | Nolle, Friederike Starke, Leonhard J. Griffo, Alessandra Lienemann, Michael Jacobs, Karin Seemann, Ralf Fleury, Jean-Baptiste Hub, Jochen S. Hähl, Hendrik |
Sprache: | Englisch |
Titel: | Langmuir |
Bandnummer: | 39 |
Heft: | 39 |
Seiten: | 13790-13800 |
Verlag/Plattform: | ACS |
Erscheinungsjahr: | 2023 |
Freie Schlagwörter: | Liquids Membranes Monolayers Permeability Vesicles |
DDC-Sachgruppe: | 500 Naturwissenschaften |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | One of the most important properties of membranes is their permeability to water and other small molecules. A targeted change in permeability allows the passage of molecules to be controlled. Vesicles made of membranes with low water permeability are preferable for drug delivery, for example, because they are more stable and maintain the drug concentration inside. This study reports on the very low water permeability of pure protein membranes composed of a bilayer of the amphiphilic protein hydrophobin HFBI. Using a droplet interface bilayer setup, we demonstrate that HFBI bilayers are essentially impermeable to water. HFBI bilayers withstand far larger osmotic pressures than lipid membranes. Only by disturbing the packing of the proteins in the HFBI bilayer is a measurable water permeability induced. To investigate possible molecular mechanisms causing the near-zero permeability, we used all-atom molecular dynamics simulations of various HFBI bilayer models. The simulations suggest that the experimental HFBI bilayer permeability is compatible neither with a lateral honeycomb structure, as found for HFBI monolayers, nor with a residual oil layer within the bilayer or with a disordered lateral packing similar to the packing in lipid bilayers. These results suggest that the low permeabilities of HFBI and lipid bilayers rely on different mechanisms. With their extremely low but adaptable permeability and high stability, HFBI membranes could be used as an osmotic pressure-insensitive barrier in situations where lipid membranes fail such as desalination membranes. |
DOI der Erstveröffentlichung: | 10.1021/acs.langmuir.3c01006 |
URL der Erstveröffentlichung: | https://doi.org/10.1021/acs.langmuir.3c01006 |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291--ds-414620 hdl:20.500.11880/37148 http://dx.doi.org/10.22028/D291-41462 |
ISSN: | 1520-5827 0743-7463 |
Datum des Eintrags: | 19-Jan-2024 |
Bezeichnung des in Beziehung stehenden Objekts: | Supporting Information |
In Beziehung stehendes Objekt: | https://pubs.acs.org/doi/suppl/10.1021/acs.langmuir.3c01006/suppl_file/la3c01006_si_002.pdf |
Fakultät: | NT - Naturwissenschaftlich- Technische Fakultät |
Fachrichtung: | NT - Physik |
Professur: | NT - Prof. Dr. Karin Jacobs NT - Prof. Dr. Ralf Seemann |
Sammlung: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
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