Scanning of key residues in antibody binding sites by two saturation-mutagenesis approaches

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TypeArticle
Journal titleNucleic Acids Symposium Series
Volume24
Pages173179; # of pages: 7
Subjectsubstances
AbstractThe complementarity-determining region 3 of the heavy chain (CDRH3) generally contributes the most to antibody-antigen binding. His101H in CDRH3 of the antibody Se155-4, which is specific for a trisaccharide epitope of Salmonella serotype B O-antigen, was mutated systematically into all nineteen other amino acids by a double mutation approach. Enzyme immunoassay (EIA) and affinity chromatography showed that the Asn, Gln, Gly and Ser mutants exhibited moderate to strong activity. Some mutants, such as Thr and Pro, had weak binding activity, while the acidic and hydrophobic amino acid substitutions resulted in complete loss of activity. A second mutation approach which randomly changed a selected residue into all other nineteen amino acids, while precluding wild-type transformants, is also described.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Biological Sciences
Peer reviewedYes
NRC numberNARANG1991
NPARC number9384322
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Record identifier5d915054-5e9c-452d-89f2-9b82be1584b5
Record created2009-07-10
Record modified2016-05-09
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