Display of membrane proteins on the heterologous caveolae carved by caveolin-1 in the Escherichia coli cytoplasm
- 주제(키워드) Caveolin-1 , Heterologous caveolae , Transmembrane protein
- 등재 SCIE, SCOPUS
- 발행기관 Elsevier Inc.
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000118688
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.enzmictec.2015.06.018
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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. © 2015 Elsevier Inc.
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