title: Generation of the B*41 group of alleles as indicated by intron sequences.
abstract: The generation of the B*41 alleles has been analysed using exon 1, intron 1, exon 2, intron 2 and exon 3 sequences. Results showed that B*4102 may have been generated as the first B*41 allele by a recombination mechanism between B*400102 and B*0801 or B*4201 involving intron 2. B*4101, B*4104 and B*4107 alleles could have been generated from B*4102 by a gene conversion event taking three different fragments from sequences belonging to intron 2/exon 3 of B*45, B*50 or B*49 alleles. B*4105 and B*4106 could be generated from B*4101 allele by point mutations, and B*4103 generation is unclear due to the lack of intron 2. The importance of introns in HLA-B allele polymorphism generation is stressed.
authors.affiliation: Immunology Research Unit, Department of Microbiology, Hospital Clinico San Carlos, Madrid, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Martínez-Laso
authors.forename: J
authors.initials: J
authors.lastname: Moscoso
authors.forename: J
authors.initials: J
authors.lastname: Zamora
authors.forename: E
authors.initials: E
authors.lastname: Gómez-Casado
authors.forename: A
authors.initials: A
authors.lastname: Arnaiz-Villena
mesh_terms: D000483:Alleles; D001483:Base Sequence; D015235:HLA-B Antigens / Q000235:genetics*; D006801:Humans; D007438:Introns / Q000235:genetics*; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic; D011995:Recombination, Genetic; D016415:Sequence Alignment; D012689:Sequence Homology, Nucleic Acid
chemical_list: D015235:HLA-B Antigens; C056322:HLA-B41 antigen