title: A novel, cheap and effective fusion expression system for the production of recombinant proteins.
abstract: To develop faster, less expensive methods for expression and purification of proteins, the annexin B1-intein fusion expression system was constructed. The interest proteins fused to the annexin B1-intein tag were purified in a single-step method based on the Ca(2+)-binding activity of annexin B1, and the annexin B1-intein fusion tag was removed based on the self-cleaving activity of the intein. Moreover, we found that in some cases, fusion to annexin B1 can promote the solubility of heterologous proteins. The production of soluble and highly active of interleukin-2 and low-molecular single-chain urokinase in our results proved that the system was a novel, cheap and effective fusion expression system for the production of valuable soluble recombinant proteins in Escherichia coli.
authors.affiliation: Department of Medical Genetics, The Second Military Medical University, Xiangyin Road 800, Shanghai, 200433, People's Republic of China.
authors.forename: Fei-Xiang
authors.initials: FX
authors.lastname: Ding
authors.forename: Hong-Li
authors.initials: HL
authors.lastname: Yan
authors.forename: Qian
authors.initials: Q
authors.lastname: Mei
authors.forename: Geng
authors.initials: G
authors.lastname: Xue
authors.forename: Yu-Zhao
authors.initials: YZ
authors.lastname: Wang
authors.forename: Yuan-Jian
authors.initials: YJ
authors.lastname: Gao
authors.forename: Shu-Han
authors.initials: SH
authors.lastname: Sun
mesh_terms: D000818:Animals; D017302:Annexins / Q000235:genetics / Q000378:metabolism*; D001709:Biotechnology / Q000191:economics / Q000379:methods*; D002118:Calcium / Q000737:chemistry; D011232:Chemical Precipitation; D003552:Cysticercus / Q000378:metabolism; D004926:Escherichia coli; D015801:Helminth Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D047668:Inteins / Q000235:genetics / Q000502:physiology; D007376:Interleukin-2 / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000191:economics / Q000235:genetics / Q000378:metabolism*; D014568:Urokinase-Type Plasminogen Activator / Q000235:genetics / Q000378:metabolism*
chemical_list: D017302:Annexins; D015801:Helminth Proteins; D007376:Interleukin-2; D011993:Recombinant Fusion Proteins; C449006:annexin B1, Taenia solium; D014568:Urokinase-Type Plasminogen Activator; D002118:Calcium