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Human antibody response to the nucleoside triphosphate hydrolase of Toxoplasma gondii. 1990

A M Tenter, and A M Johnson
Department of Clinical Microbiology, Flinders University School of Medicine, Flinders Medical Centre, South Australia.

An enzyme-linked immunosorbent assay (ELISA) that uses a recombinant protein of Toxoplasma gondii as antigen was used for the detection of specific antibodies in human sera. An antigenic portion of the T. gondii nucleoside triphosphate hydrolase (NTPase) was expressed in Escherichia coli as a glutathione S-transferase fusion protein with an apparent molecular mass of about 5000. A total of 118 T. gondii positive and 63 negative sera were examined. Seven % of the T. gondii positive sera, but none of the negative sera, reacted with the recombinant NTPase. Advantages and disadvantages that are associated with the use of fusion proteins as antigens in ELISA are discussed.

UI MeSH Term Description Entries
D010744 Phosphoric Monoester Hydrolases A group of hydrolases which catalyze the hydrolysis of monophosphoric esters with the production of one mole of orthophosphate. Phosphatase,Phosphatases,Phosphohydrolase,Phosphohydrolases,Phosphomonoesterase,Phosphomonoesterases,Phosphoric Monoester Hydrolase,Hydrolase, Phosphoric Monoester,Hydrolases, Phosphoric Monoester,Monoester Hydrolase, Phosphoric
D011994 Recombinant Proteins Proteins prepared by recombinant DNA technology. Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D004797 Enzyme-Linked Immunosorbent Assay An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed. ELISA,Assay, Enzyme-Linked Immunosorbent,Assays, Enzyme-Linked Immunosorbent,Enzyme Linked Immunosorbent Assay,Enzyme-Linked Immunosorbent Assays,Immunosorbent Assay, Enzyme-Linked,Immunosorbent Assays, Enzyme-Linked
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000913 Antibodies, Protozoan Immunoglobulins produced in a response to PROTOZOAN ANTIGENS. Protozoan Antibodies
D000953 Antigens, Protozoan Any part or derivative of any protozoan that elicits immunity; malaria (Plasmodium) and trypanosome antigens are presently the most frequently encountered. Protozoan Antigens
D014122 Toxoplasma A genus of protozoa parasitic to birds and mammals. T. gondii is one of the most common infectious pathogenic animal parasites of man. Toxoplasma gondii,Toxoplasma gondius,Toxoplasmas,gondius, Toxoplasma
D014123 Toxoplasmosis The acquired form of infection by Toxoplasma gondii in animals and man. Toxoplasma gondii Infection,Infection, Toxoplasma gondii
D043583 Nucleoside-Triphosphatase An enzyme which catalyzes the hydrolysis of nucleoside triphosphates to nucleoside diphosphates. It may also catalyze the hydrolysis of nucleotide triphosphates, diphosphates, thiamine diphosphates and FAD. The nucleoside triphosphate phosphohydrolases I and II are subtypes of the enzyme which are found mostly in viruses. NTPase,Nucleoside Triphosphatase,Nucleoside Triphosphate Phosphohydrolase,Nucleoside Triphosphate Phosphohydrolase I,Nucleoside Triphosphate Phosphohydrolase II,Nucleosidetriphosphatase,Phosphohydrolase, Nucleoside Triphosphate,Triphosphatase, Nucleoside,Triphosphate Phosphohydrolase, Nucleoside

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