電気学会論文誌C(電子・情報・システム部門誌)
Online ISSN : 1348-8155
Print ISSN : 0385-4221
ISSN-L : 0385-4221
<生体医工学・福祉工学>
パターン化人工膜への膜タンパク質の再構成
永井 るりか杉町 純音谷本 泰士鈴木 健一林 文夫笠井 倫志森垣 憲一
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2021 年 141 巻 12 号 p. 1340-1343

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Model biological membranes are a useful tool to study the molecular properties and functions of membrane proteins. We develop a strategy to directly reconstitute mammalian membrane proteins from the cell membrane into a model biological membrane to bypass the technically challenging solubilization and purification processes. We expressed dopamine D2 receptor (D2R), a G-protein coupled receptor (GPCR), in Chinese hamster ovary (CHO) cells and produced cell membrane blebs by chemical induction. By introducing blebs into a patterned framework of lithographically-polymerized lipid bilayer on the substrate surface, we could form a planar bilayer and observe single molecules of D2R. Interestingly, a much higher density of D2R molecules were reconstituted in a nanometric cleft between the substrate and a poly-dimethylsiloxane (PDMS) elastomer sheet. This methodology should enable to evaluate the physicochemical properties and functions of a wide range of mammalian membrane proteins.

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