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Visualization of the binding of IgG myeloma proteins to some group A streptococci. 1976

P Christensen, and L V Soltesz, and V A Oxelius

The interaction between streptococci and human IgG, which does not involve the antibody combining sites, was visualized in the electron microscope by the use of human IgG myeloma proteins and ferritin labelled rabbit anti-human IgG antibodies. The streptococci were allowed to react with human IgG myeloma proteins and the human IgG was then marked by addition of ferritin labelled rabbit anti-human IgG antibodies; sections of streptocci studied in electron microscopy showed localization of the ferritin on the surface of the cell wall of all the streptococci of type M 1, M 3, M 12 and M 56 studied. Similar results were obtained if the ferritin labelled rabbit anti-human IgG antibodies alone were allowed to react with the streptococci. The uptake of ferritin labelled rabbit anti-human IgG antibodies could be inhibited by addition of normal rabbit serum.

UI MeSH Term Description Entries
D007074 Immunoglobulin G The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B. Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
D009194 Myeloma Proteins Abnormal immunoglobulins characteristic of MULTIPLE MYELOMA. M Components,Proteins, Myeloma
D002473 Cell Wall The outermost layer of a cell in most PLANTS; BACTERIA; FUNGI; and ALGAE. The cell wall is usually a rigid structure that lies external to the CELL MEMBRANE, and provides a protective barrier against physical or chemical agents. Cell Walls,Wall, Cell,Walls, Cell
D003429 Cross Reactions Serological reactions in which an antiserum against one antigen reacts with a non-identical but closely related antigen. Cross Reaction,Reaction, Cross,Reactions, Cross
D005293 Ferritins Iron-containing proteins that are widely distributed in animals, plants, and microorganisms. Their major function is to store IRON in a nontoxic bioavailable form. Each ferritin molecule consists of ferric iron in a hollow protein shell (APOFERRITINS) made of 24 subunits of various sequences depending on the species and tissue types. Basic Isoferritin,Ferritin,Isoferritin,Isoferritin, Basic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001666 Binding Sites, Antibody Local surface sites on antibodies which react with antigen determinant sites on antigens (EPITOPES.) They are formed from parts of the variable regions of FAB FRAGMENTS. Antibody Binding Sites,Paratopes,Antibody Binding Site,Binding Site, Antibody,Paratope
D013297 Streptococcus pyogenes A species of gram-positive, coccoid bacteria isolated from skin lesions, blood, inflammatory exudates, and the upper respiratory tract of humans. It is a group A hemolytic Streptococcus that can cause SCARLET FEVER and RHEUMATIC FEVER. Flesh-Eating Bacteria,Streptococcus Group A,Bacteria, Flesh-Eating
D014357 Trypsin A serine endopeptidase that is formed from TRYPSINOGEN in the pancreas. It is converted into its active form by ENTEROPEPTIDASE in the small intestine. It catalyzes hydrolysis of the carboxyl group of either arginine or lysine. EC 3.4.21.4. Tripcellim,Trypure,beta-Trypsin,beta Trypsin

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