Overexpression and simple purification of human immunodeficiency virus-1 gag epitope derived from a recombinant antigen in E. coli and its use in ELISA

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Title
Overexpression and simple purification of human immunodeficiency virus-1 gag epitope derived from a recombinant antigen in E. coli and its use in ELISA
Author(s)
Mi Jin Sohn; Young Hae Chong; Ji Eun Chang; Young Ik Lee
Bibliographic Citation
Journal of Biotechnology, vol. 34, pp. 149-155
Publication Year
1994
Abstract
To develop a test for diagnosis of human immunodeficiency virus-1 (HIV-1) exposure sensitivity, a part of the gag gene was cloned and expressed in Escherichia coli, using expression vectors containing a trp promoter. The immunoreactivity of recombinant protein was determined using HIV-1 specific antibodies in a Western blot analysis. The recombinant plasmid, pYHCgag3, gag gene was fused to the trpE' gene linked to the hydroxylamine (HA) cleavage recognition sequence which was induced to overexpress a core antigen (gag a.a. 121-398 from plasmid BH10) as fusion protein in the form of insoluble inclusion body. Recombinant gag was purified by a simple single step purification procedure. After partial purification of inclusion bodies and subject to the HA-cleavage treatment, gag protein was further purified to homogeneity using DEAE-Sepharose chromatography. The purified core antigen offered reliable results with high sensitivity and specificity for identification of HIV-1 antibodies when tested in the enzyme-linked immunosorbent assay (ELISA). These results suggest that mass production of recombinant core antigen will provide a valuable resource to HIV-1 serodiagnostics for the screening of large groups of blood donors to prevent HIV-1 infection.
Keyword
Gag3 purificationHuman immunodeficency virus-1
ISSN
0168-1656
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/0168-1656(94)90084-1
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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