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Clinical and Diagnostic Laboratory Immunology logoLink to Clinical and Diagnostic Laboratory Immunology
. 1996 May;3(3):355–357. doi: 10.1128/cdli.3.3.355-357.1996

Recombinant Toxoplasma gondii surface antigen 1 (P30) expressed in Escherichia coli is recognized by human Toxoplasma-specific immunoglobulin M (IgM) and IgG antibodies.

D Harning 1, J Spenter 1, A Metsis 1, J Vuust 1, E Petersen 1
PMCID: PMC170346  PMID: 8705683

Abstract

The immunodominant surface antigen of Toxoplasma gondii, surface antigen 1 (SAG1), was expressed in Escherichia coli as a fusion protein containing a majority of the SAG1 protein supplied with six histidyl residues in the N-terminal end. The recombinant protein was purified on a Ni-chelate column and then on a fast-performance liquid chromatography column and was in a nonreduced condition. It was recognized by T. gondii-specific human immunoglobulin G (IgG) and IgM antibodies as well as by a mouse monoclonal antibody (S13) recognizing only nonreduced native SAG1. Antibodies induced in mice by the recombinant SAG1 recognized native SAG1 from the T. gondii RH isolate in culture. Recombinant SAG1 is suitable for use in diagnostic systems for detecting anti-SAG1-specific IgG and IgM antibodies.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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