MOLECULAR CLONING OF A cDNA ENCODING AN ANTIGENIC POLYPEPTIDE OF CYSTICERCUS CELLULOSAE / 中国血吸虫病防治杂志

ABSTRACT

Objective To immunoscreen one protein antigen gene from a cDNA library of cysticercus cellulosae. Methods The cDNA library of cysticercus cellulosae was immunoscreened by using the serum of patient with cerebral cysticercosis. After the insert of positive clone was amplified by PCR and subcloned into pUC18, the nucleotide sequence of the cDNA was determined by the dideoxynucleotide chain termination method using a Taq DyeDeoxy Terminator Cycle Sequencing Kit. The homological search of the nucleotide sequence was done by using BLASTN in NCBI. Results A cDNA clone (named cY1) with a length of 546 bp was isolated. The clone contained one open reading frame composed of 474 bp encoding 158 amino acids. The nucleotide sequence of cY1 showed 99% homology with one immunogenic protein gene named NC-9 of cysticercus cellulosae. Conclusion A gene encoding protein antigen of cysticercus cellulosae is cloned.