title: SB subregion of the human major histocompatibility complex: gene organization, allelic polymorphism and expression in transformed cells.
abstract: The SB region of the human major histocompatibility complex (MHC) has been cloned from cosmid and lambda phage libraries made from the human B-lymphoblastoid cell line Priess (DR4/4, DC4/4, SB3/4). Two alpha genes and two beta genes are encoded in the 100 kb long SB region in the order SB alpha-SB beta-SX alpha-SX beta. The SB alpha and SB beta genes encode the alpha and beta subunits of the SB subset of class II MHC molecules. Both the SX alpha and the SX beta genes are pseudogenes in the haplotype examined. From the isolated clones, the two haplotypes of the Priess cell line, SB3 and SB4, are distinguished by nucleotide sequencing and blot hybridization analyses. Restriction site polymorphisms between the SB3 and SB4 clones were observed only in relatively small regions of the SB beta and SX beta genes. A mouse macrophage cell line was transfected with one of the cosmid clones containing both SB alpha and SB beta genes. Expression of the alpha and beta genes was detected by fluorescene-activated cell sorting (FACS) and two-dimensional gel electrophoresis using SB-specific monoclonal antibodies.
authors.forename: K
authors.initials: K
authors.lastname: Okada
authors.forename: H L
authors.initials: HL
authors.lastname: Prentice
authors.forename: J M
authors.initials: JM
authors.lastname: Boss
authors.forename: D J
authors.initials: DJ
authors.lastname: Levy
authors.forename: D
authors.initials: D
authors.lastname: Kappes
authors.forename: T
authors.initials: T
authors.lastname: Spies
authors.forename: R
authors.initials: R
authors.lastname: Raghupathy
authors.forename: R A
authors.initials: RA
authors.lastname: Mengler
authors.forename: C
authors.initials: C
authors.lastname: Auffray
authors.forename: J L
authors.initials: JL
authors.lastname: Strominger
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D002874:Chromosome Mapping; D004262:DNA Restriction Enzymes; D005786:Gene Expression Regulation; D005796:Genes; D005818:Genetic Engineering; D006682:HLA-DP Antigens; D000949:Histocompatibility Antigens Class II / Q000235:genetics*; D006801:Humans; D007526:Isoelectric Point; D046911:Macromolecular Substances; D008264:Macrophages / Q000276:immunology; D008285:Major Histocompatibility Complex; D008970:Molecular Weight; D011110:Polymorphism, Genetic
chemical_list: D006682:HLA-DP Antigens; D000949:Histocompatibility Antigens Class II; D046911:Macromolecular Substances; D004262:DNA Restriction Enzymes