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Structures of C1-IgG1 provide insights into how danger pattern recognition activates complement
Author(s) -
Deniz Ugurlar,
Stuart C. Howes,
Bart-Jan de Kreuk,
Roman I. Koning,
Rob N. de Jong,
Frank J. Beurskens,
Janine Schuurman,
Abraham J. Koster,
Thomas H. Sharp,
Paul W.H.I. Parren,
Piet Gros
Publication year - 2018
Publication title -
science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 12.556
H-Index - 1186
eISSN - 1095-9203
pISSN - 0036-8075
DOI - 10.1126/science.aao4988
Subject(s) - random hexamer , avidity , antibody , immune system , classical complement pathway , mutagenesis , complement system , microbiology and biotechnology , immune recognition , biology , complement (music) , immunoglobulin g , chemistry , biophysics , immunology , genetics , mutation , mutant , complementation , gene
Recognizing danger signals In the classical complement pathway, the C1 initiation complex binds to danger patterns on the surface of microbes or damaged host cells and triggers an immune response. Immunoglobulin G (IgG) antibodies form hexamers on cell surfaces that have high avidity for the C1 complex. Ugurlaret al. used cryo–electron microscopy to show how a hexamer of C1 complexes interacts with the IgG hexamer. Structure-guided mutagenesis revealed how C1 is activated to trigger an immune response.Science , this issue p.794

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