Simplified, enhanced protein purification using an inducible, autoprocessing enzyme tag.
Simplified, enhanced protein purification using an inducible, autoprocessing enzyme tag.
复制标题
DOI:
10.1371/journal.pone.0008119
复制
发表时间:
2009-12-02
期刊:
影响因子:
3.7
通讯作者:
Bogyo M
中科院分区:
文献类型:
--
作者:
Shen A;Lupardus PJ;Morell M;Ponder EL;Sadaghiani AM;Garcia KC;Bogyo M
We introduce a new method for purifying recombinant proteins expressed in bacteria using a highly specific, inducible, self-cleaving protease tag. This tag is comprised of the Vibrio cholerae MARTX toxin cysteine protease domain (CPD), an autoprocessing enzyme that cleaves exclusively after a leucine residue within the target protein-CPD junction. Importantly, V. cholerae CPD is specifically activated by inositol hexakisphosphate (InsP6), a eukaryotic-specific small molecule that is absent from the bacterial cytosol. As a result, when His6-tagged CPD is fused to the C-terminus of target proteins and expressed in Escherichia coli, the full-length fusion protein can be purified from bacterial lysates using metal ion affinity chromatography. Subsequent addition of InsP6 to the immobilized fusion protein induces CPD-mediated cleavage at the target protein-CPD junction, releasing untagged target protein into the supernatant. This method condenses affinity chromatography and fusion tag cleavage into a single step, obviating the need for exogenous protease addition to remove the fusion tag(s) and increasing the efficiency of tag separation. Furthermore, in addition to being timesaving, versatile, and inexpensive, our results indicate that the CPD purification system can enhance the expression, integrity, and solubility of intractable proteins from diverse organisms.
登录
查看更多内容
影响因子:
64.5
作者:
Park CY;Hoover PJ;Mullins FM;Bachhawat P;Covington ED;Raunser S;Walz T;Garcia KC;Dolmetsch RE;Lewis RS
通讯作者:
Lewis RS
影响因子:
16
作者:
Skiniotis, Georgios;Lupardus, Patrick J.;Martick, Monika;Walz, Thomas;Garcia, K. Christopher
通讯作者:
Garcia, K. Christopher
影响因子:
11.4
作者:
Sheahan, Kerri-Lynn;Cordero, Christina L.;Satchell, Karla J. Fullner
通讯作者:
Satchell, Karla J. Fullner
DOI:
10.1126/science.1162403
发表时间:
2008-10-10
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Lupardus PJ;Shen A;Bogyo M;Garcia KC
通讯作者:
Garcia KC
影响因子:
3.8
作者:
Raboy, V
通讯作者:
Raboy, V