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Coexpression of Alginate Lyase with Hyperthermophilic Archaea Chaperonin in E. coli
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  • Journal title : Journal of Life Science
  • Volume 25, Issue 2,  2015, pp.130-135
  • Publisher : Korean Society of Life Science
  • DOI : 10.5352/JLS.2015.25.2.130
 Title & Authors
Coexpression of Alginate Lyase with Hyperthermophilic Archaea Chaperonin in E. coli
Kim, Se Won; Kim, Gun-Do; Nam, Soo-Wan;
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When the alginate lyase gene (aly) from Pseudoalteromonas elyakovii IAM 14594 was expressed in E. coli, most of the gene product expressed was produced as aggregated insoluble particles known as inclusion bodies. In order to produce with an elevated level of a soluble and active form of alginate lyase in E. coli, the hyperthermophilic chaperonins (ApCpnA and ApCpnB) from archaeon Aeropyrum pernix K1 were employed as the coexpression partners. At culture temperature, the level of alginate lyase activity was increased from 10.1 unit/g-soluble protein in aly single expression to 83.1 unit/g-soluble protein by coexpressing with ApCpnA and to 100.3 unit/g-soluble protein by coexpressing with ApCpnB. This results indicate that the coexpression of aly with ApCpnA and ApCpnB revealed a marked enhancement, about 8~10 fold, in the production of alginate lyase as a soluble and active form. Based on the results of various examinations on the expression variables, the optimal conditions for the maximal production of alginate lyase were determined as 1.0 mM IPTG for the inducer concentration, for the culture temperature after IPTG induction, and ApCpnB for the coexpression partner. The coexpression set in the present report may be useful in the industrial production of functionally or medically important recombinant proteins in E. coli.
Aeropyrum pernix;alginate lyase;chaperonin;coexpression;E. coli;
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