Distance tuneable integral membrane protein containing floating bilayers via in situ directed self-assembly.
Nanoscale
; 16(28): 13503-13515, 2024 Jul 18.
Article
in En
| MEDLINE
| ID: mdl-38940744
ABSTRACT
Model membranes allow for structural and biophysical studies on membrane biochemistry at the molecular level, albeit on systems of reduced complexity which can limit biological accuracy. Floating supported bilayers offer a means of producing planar lipid membrane models not adhered to a surface, which allows for improved accuracy compared to other model membranes. Here we communicate the incorporation of an integral membrane protein complex, the multidomain ß-barrel assembly machinery (Bam), into our recently developed in situ self-assembled floating supported bilayers. Using neutron reflectometry and quartz crystal microbalance measurements we show this sample system can be fabricated using a two-step self-assembly process. We then demonstrate the complexity of the model membrane and tuneability of the membrane-to-surface distance using changes in the salt concentration of the bulk solution. Results demonstrate an easily fabricated, biologically accurate and tuneable membrane assay system which can be utilized for studies on integral membrane proteins within their native lipid matrix.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Lipid Bilayers
/
Membrane Proteins
Language:
En
Journal:
Nanoscale
Year:
2024
Document type:
Article
Affiliation country: