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- W2141576749 abstract "This is the first study in which the complex of a monoclonal autoantibody fragment and its target, stem loop II of U1 snRNA, was investigated with enzymatic and chemical probing. A phage display antibody library derived from bone marrow cells of an SLE patient was used for selection of scFvs specific for stem loop II. The scFv specificity was tested by RNA immunoprecipitation and nitrocellulose filter binding competition experiments. Immunofluorescence data and immunoprecipitation of U1 snRNPs containing U1A protein, pointed to an scFv binding site different from the U1A binding site. The scFv binding site on stem loop II was determined by footprinting experiments using RNase A, RNase V1, and hydroxyl radicals. The results show that the binding site covers three sequence elements on the RNA, one on the 5' strand of the stem and two on the 3' strand. Hypersensitivity of three loop nucleotides suggests a conformational change of the RNA upon antibody binding. A three-dimensional representation of stem loop II reveals a juxtapositioning of the three protected regions on one side of the helix, spanning approximately one helical turn. The location of the scFv binding site on stem loop II is in full agreement with the finding that both the U1A protein and the scFv are able to bind stem loop II simultaneously. As a consequence, this recombinant monoclonal anti-U1 snRNA scFv might be very useful in studies on U1 snRNPs and its involvement in cellular processes like splicing." @default.
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- W2141576749 date "1998-09-01" @default.
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- W2141576749 title "Characterization of an anti-RNA recombinant autoantibody fragment (scFv) isolated from a phage display library and detailed analysis of its binding site on U1 snRNA" @default.
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- W2141576749 doi "https://doi.org/10.1017/s1355838298980633" @default.
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