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2017 ; 7
(1
): 15139
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Rupturing Giant Plasma Membrane Vesicles to Form Micron-sized Supported Cell
Plasma Membranes with Native Transmembrane Proteins
#MMPMID29123132
Chiang PC
; Tanady K
; Huang LT
; Chao L
Sci Rep
2017[Nov]; 7
(1
): 15139
PMID29123132
show ga
Being able to directly obtain micron-sized cell blebs, giant plasma membrane
vesicles (GPMVs), with native membrane proteins and deposit them on a planar
support to form supported plasma membranes could allow the membrane proteins to
be studied by various surface analytical tools in native-like bilayer
environments. However, GPMVs do not easily rupture on conventional supports
because of their high protein and cholesterol contents. Here, we demonstrate the
possibility of using compression generated by the air-water interface to
efficiently rupture GPMVs to form micron-sized supported membranes with native
plasma membrane proteins. We demonstrated that not only lipid but also a native
transmembrane protein in HeLa cells, Aquaporin 3 (AQP3), is mobile in the
supported membrane platform. This convenient method for generating micron-sized
supported membrane patches with mobile native transmembrane proteins could not
only facilitate the study of membrane proteins by surface analytical tools, but
could also enable us to use native membrane proteins for bio-sensing
applications.