Cloning and efficient prokaryotic expression of soluble stage-specific antigen cC1 from Cysticercus cellulosae / 南方医科大学学报
Journal of Southern Medical University
;
(12): 206-209, 2010.
Article
in Chinese
| WPRIM
| ID: wpr-269592
ABSTRACT
<p><b>OBJECTIVE</b>To clone the coding gene of the stage-specific antigen cC1 from Cysticercus cellulosae and express high levels of soluble cC1 in E.coli.</p><p><b>METHODS</b>The cC1 gene was amplified from Cysticercus cellulosae by RT-PCR and cloned into pMD18-T vector, followed by subcloning into the prokaryotic expression plasmid pET28a. The recombinant plasmid was transformed into E.coli BL21(DE3) and the expression conditions were optimized. The expressed product was purified by Ni(+)-affinity chromatography, analyzed by high-performance liquid chromatography (HPLC), and identified with SDS-PAGE and Western blotting.</p><p><b>RESULTS</b>The fragment length of the amplification product by RT-PCR was 1056 bp. Comparison of the amplified gene sequence with the cC1 gene in Genbank identified a samesense point mutation at 423 position in the gene cloned into the expression plasmids. After a 6-h induction with 0.05 mmol/L IPTG at 37 degrees celsius;, the expression of the 40 kd soluble fusion protein exceeded 60% of the total bacterial protein, and the fusion protein was recognized by Cysticercus-infected human sera. The purity of the fusion protein was about 94% after purification by affinity chromatography.</p><p><b>CONCLUSION</b>The stage-specific antigen cC1 from Cysticercus cellulosae has been successfully cloned and the soluble protein efficiently expressed in E.coli, which provides the basis for its further study and application.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Solubility
/
Swine
/
Recombinant Fusion Proteins
/
Cloning, Molecular
/
Cysticercus
/
Taenia solium
/
Allergy and Immunology
/
Escherichia coli
/
Genetic Vectors
/
Genetics
Limits:
Animals
/
Humans
Language:
Chinese
Journal:
Journal of Southern Medical University
Year:
2010
Type:
Article
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