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Expression and Purification of the Cystic Fibrosis Transmembrane Conductance Regulator Protein in Saccharomyces cerevisiae
Published on: March 10, 2012
Expression and characterization of Saccharomyces cerevisiae Cne1p, a calnexin homologue
Xiaohua Xu1, Kunitoshi Kanbara, Hiroyuki Azakami
1Department of Biological Chemistry, Yamaguchi University, Yamaguchi 753-8515.
Abstract:
The calnexin homologue (Cne1p) of Saccharomyces cerevisiae was expressed in Escherichia coli to evaluate its chaperone function. The chaperone function was examined as to the effects on the suppression of thermal denaturation and the enhancement of refolding, using citrate synthase (CS) as a nonspecific chaperone substrate. Cne1p effectively suppressed the thermal denaturation of CS and enhanced the refolding of thermally or chemically denatured CS in a concentration-dependent manner. In addition, the chaperone function of Cne1p was greatly affected in the presence of monoglucosylated oligosaccharides (G1M9) that specifically bind to the lectin site. These results indicated that Cne1p functions as a molecular chaperone in Saccharomyces cerevisiae.
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