AJMB  Vol.3 No.1 , January 2013
Effect of 4% glycerol and low aeration on result of expression in Escherichia coli of Cin3 and three Venturia inaequalis EST’s recombinant proteins

The phytopathogenic fungus Venturia inaequalis causes scab of apple. Once this fungus penetrates the plant surface, it forms a specialized body called a stroma between the inner cuticle surface and the epidermal cell wall. A novel Venturia inaequalis 5704 (Cin3) and three expressed sequence tags (ESTs); 38, 6987, and 4010 are strongly up-regulated in the early stages of infection. The CIN3 and three ESTs using two vectors pMAL-c2 and pET 21 were expressed in Escherichia coli. Recombinant proteins expression, solubility and yields were analyzed. 38, 5704 (Cin3) and 6987 re- combinant proteins were expressed in soluble form and while 4010 was expressed in inclusion bodies. Re- solution on native-PAGE, the recombinant proteins; 38, 5704 (Cin3), 6987 were shown to be present in dimmer, tetramer and polymer. A method was de- veloped, consisting of induction of expression at va- rious temperatures, and using enriched broth with 4% glycerol together with slow shaking, led to a decrease in concentration of nascent polypeptide and production of soluble recombinant proteins of; 38, 5704 (Cin3), 6987 and 4010. Resolution on native- PAGE, the recombinant proteins were shown to be present as monomer.

Cite this paper
Al-Samarrai, T. , Jones, W. , Harvey, D. , Kirk, C. and Templtone, M. (2013) Effect of 4% glycerol and low aeration on result of expression in Escherichia coli of Cin3 and three Venturia inaequalis EST’s recombinant proteins. American Journal of Molecular Biology, 3, 1-9. doi: 10.4236/ajmb.2013.31001.
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