Open AccessAnalysis of HLA-D region-associated molecules with monoclonal antibody.
Author(s) -
Dominique Charron,
Hugh O. McDevitt
Publication year - 1979
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.76.12.6567
Subject(s) - monoclonal antibody , human leukocyte antigen , microbiology and biotechnology , antigen , biology , allele , somatic cell , antibody , gel electrophoresis , immunoprecipitation , polyacrylamide gel electrophoresis , genotype , genetics , gene , biochemistry , enzyme
A group of monoclonal antibodies directed against nonpolymorphic HLA-D antigens (human Ia antigens) was produced by somatic cell hybridization. One of these antibodies was used to analyze the two-dimensional polyacrylamide gel electrophoretic pattern of the HLA-D alloantigens from different HLA-D homozygous B-cell lines. Two-dimensional gels of [35S]methionine-labeled cell extracts immunoprecipitated by a monoclonal antibody directed against HLA-D antigens showed a complex set of spots whose electrophoretic pattern varied according to the HLA-D type. The major HLA-D-related electrophoretic polymorphism was found in the basic and smaller (26,000-28,000 daltons) HLA-D polypeptides. These patterns represent allele-specific "fingerprints" of different HLA-D genotypes. There are striking similarities with respect to number, size, and charge spectrum among HLA-D polypeptides and the murine I-A and I-E subregion polypeptides, suggesting a similar genetic organization and molecular complexity in both species.