FUSION GENE OF HEPATITIS B SURFACE ANTIGEN WITH CARBOXYL END HAVING PRES2 IMMUNE DETERMINANT AND THE PROTEIN THEREOF

摘要

The invention provides a fusion gene encoding a new-type Hepatitis B virus surface antigen and the protein thereof. The nucleotide sequence, encoding Hepatitis B virus preS2 antigen (Met1-Gly26) containing B-cell and T-cell epitopes and polymerized albumin binding site, is fused to 3' terminal of Hepatitis B virus surface antigenic main protein S gene, then the expression is carried out in yeast expression system. The expressed products, possessing simultaneously antigenicity of S and preS2, are assembled into virus-like particles with diameter of about 20-35nm and are potential for developing novel Hepatitis B vaccines.