[Cloning and sequencing of E2/NS1 gene from a Chinese genotype III isolate of hepatitis C virus].
OBJECTIVE
To clone E2/NS1 gene from a Chinese genotype III isolate of hepatitis C virus into mammalian expression vector and analyze its primary nucleotide structure.


METHODS
Reverse transcription nested-PCR methods were employed for amplification E2/NS1 gene which was cloned into mammalian expression vector pcDNA3 by directed clone. Sequence of inserted gene was analyzed by Sanger's method.


RESULTS
E2/NS1 gene from a Chinese genotype III isolate of hepatitis C virus was cloned into eukaroytic expression vector effectively. Sequence of E2/NS1 showed 88.37% identity in nucleotide and 89.29% in putative amino acid to that of a Japanese genotype III isolate of hepatitis C virus. Nevertheless it showed 70.69% and 75.55% identity to that of a Chinese genotype II isolate of hepatitis C virus.


CONCLUSIONS
E2/NS1 gene from a Chinese genotype III isolate of hepatitis C virus was successfully cloned into mammalian expression vector by technique of DNA recombination. Sequence analysis showed that E2/NS1 gene has good homology intra-genotype and poor homology intergenotype of hepatitis C virus. Research of primary nucleotide structure of different genotype hepatitis C virus might be helpful for the development of vaccine against the virus.
Institute of Hepatology, People's Hospital, Beijing Medical University.
C
C
Wu
Q
Q
Tao
D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D005838:Genotype; D016174:Hepacivirus / Q000145:classification / Q000235:genetics*; D006801:Humans; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D017421:Sequence Analysis