Volume 30, Issue 1 pp. 7-13
Article
Full Access

Expression of pre-S2 region of hepatitis B surface antigen in Escherichia coli

M. W. Yu Ph.D.

Corresponding Author

M. W. Yu Ph.D.

Division of Blood and Blood Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland

Division of Blood and Blood Products, Center for Biologics Evaluation and Research, Food and Drug Administration, 8800 Rockville Pike, Bethesda, MD 20892===Search for more papers by this author
J. W.-K. Shih

J. W.-K. Shih

Department of Transfusion Medicine, Clinical Center, National Institutes of Health, Bethesda, Maryland

Search for more papers by this author
H. Bursztyn-Pettegrew

H. Bursztyn-Pettegrew

Department of Molecular Biology, Syntex Research, Palo Alto, California

Search for more papers by this author
N. E. Byars

N. E. Byars

Department of Molecular Biology, Syntex Research, Palo Alto, California

Search for more papers by this author
A. C. Allison

A. C. Allison

Department of Molecular Biology, Syntex Research, Palo Alto, California

Search for more papers by this author
H. W. Chan

H. W. Chan

Department of Molecular Biology, Syntex Research, Palo Alto, California

Search for more papers by this author
First published: January 1990
Citations: 1

Abstract

We constructed a recombinant plasmid that can express the entire pre-S2 sequence of hepatitis B surface antigen (HBsAg) as a fusion protein in E. coli. The hybrid protein, which comprises the bacterial TrpLE protein and the pre-S2 sequence, was the prominent protein that was found in cell extracts. As determined by immune blot analysis, this protein reacted with human HBV convalescent sera, as well as with sera from animals immunized with either purified HBsAg or isolated polypeptides containing pre-S2. It bound specifically to 125I-polymerized human albumin cross-linked with glutaraldehyde but not to 125I-monomeric human albumin. A novel adjuvant formulation was used in place of Freund's adjuvant to immunize guinea pigs with the recombinant product. The antisera obtained from serial bleedings were found to react with HBsAg of both d and y subtypes. These antisera were also shown to react solely with HBsAg polypeptides which contain the pre-S2 sequence and to block the binding of HBsAg to solid-phase polymerized human albumin.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.