Display of membrane proteins on the heterologous caveolae carved by caveolin-1 in the Escherichia coli cytoplasm

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Title
Display of membrane proteins on the heterologous caveolae carved by caveolin-1 in the Escherichia coli cytoplasm
Author(s)
J Shin; Y H Jung; D H Cho; M Park; K E Lee; Y Yang; C Jeong; Bong Hyun SungJung Hoon Sohn; J B Park; D H Kweon
Bibliographic Citation
Enzyme and Microbial Technology, vol. 79, pp. 55-62
Publication Year
2015
Abstract
Caveolae are membrane-budding structures that exist in many vertebrate cells. One of the important functions of caveolae is to form membrane curvature and endocytic vesicles. Recently, it was shown that caveolae-like structures were formed in Escherichia coli through the expression of caveolin-1. This interesting structure seems to be versatile for a variety of biotechnological applications. Targeting of heterologous proteins in the caveolae-like structure should be the first question to be addressed for this purpose. Here we show that membrane proteins co-expressed with caveolin-1 are embedded into the heterologous caveolae (h-caveolae), the cavaolae-like structures formed inside the cell. Two transmembrane SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins, Syntaxin 1a and vesicle-associated membrane protein 2 (VAMP2), were displayed on the h-caveolae surface. The size of the h-caveolae harboring the transmembrane proteins was ~100. nm in diameter. The proteins were functional and faced outward on the h-caveolae. Multi-spanning transmembrane proteins FtsH and FeoB could be included in the h-caveolae, too. Furthermore, the recombinant E. coli cells were shown to endocytose substrate supplemented in the medium. These results provide a basis for exploiting the h-caveolae formed inside E. coli cells for future biotechnological applications.
Keyword
Caveolin-1Heterologous caveolaeTransmembrane protein
ISSN
0141-0229
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/j.enzmictec.2015.06.018
Type
Article
Appears in Collections:
Division of Biomaterials Research > Synthetic Biology and Bioengineering Research Center > 1. Journal Articles
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