期刊
ENZYME AND MICROBIAL TECHNOLOGY
卷 79-80, 期 -, 页码 55-62出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.enzmictec.2015.06.018
关键词
Caveolin-1; Heterologous caveolae; Transmembrane protein
资金
- Marine Biotechnology Program - Ministry of Land, Transport, and Maritime Affairs of Korea
- Institute of Planning and Evaluation for Technology of Ministry for Food, Agriculture, Forestry and Fisheries [310006-5]
- Basic Science Research Program through a National Research Foundation of Korea - Ministry of Science, ICT & Future Planning [2009-0083540]
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 la 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 similar to 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. (C) 2015 Elsevier Inc. All rights reserved.
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