PMID: 15377422Sep 21, 2004Paper

Cloning and expression in Escherichia coli of a new gene of Schistosoma japonicum encoding casein kinase II beta subunit

Chinese Medical Journal
Zhai-yu PengZi Li

Abstract

Nowadays it is now a focus topic in schistosomiasis research to find ideal vaccine candidates and new drug targets for developing anti-schistosomiasis vaccine. We cloned a new gene, casein kinase II beta subunit, of Schistosoma japonicum (S. japonicum) and express it in Escherichia coli (E. coli). The ESTs obtained in our laboratory were analyzed by homologous searching, and a new gene was recognized. The full-length cDNA of the new gene was obtained by joining the 3'RACE PCR fragment and the EST clone. To express the new gene, the cDNA was cloned into pGEX-4T-1 vector and then transformed into E. coli JM109. The recombinant protein was analyzed by SDS-PAGE and Western-blot. A 908 bp cDNA was isolated from S. japonicum and identified to be casein kinase II beta subunit gene by sequence analysis. The open reading frame of the gene encodes a protein of 217 amino acids exhibiting 75.8%, 75.8%, 73.9%, 68.2%, 51.6% identity to the amino acids sequence of the corresponding genes of Homo sapiens (H. sapiens), Xenopus laevi (X. laevi), Drosophila melanogaster (D. melanogaster), Caenorhabditis elegan (C. elegan), and Schizosaccharomyces pombe (S. promber) respectively. The predicted molecular weight of the protein was 24.921 kDa. The ne...Continue Reading

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