title: [Sequence of HLA-DQA1 promoter region in the Han people].
abstract: Polymorphism of HLA-DQA1 promoter region (QAP) in the Han people has been identified. The results revealed a number of differences, some of which are in the critical class II boxes, and generally conserved in HLA-DQA1 promoter region. The major differences occurred in the X box, Y box and S box. Within the X box, the Hans carry a A at position -111, instead of a G, and a G or a A can be present at position -98. Within the S box, the Hans carry a G at position -131. Within the Y box, position -71 is a A rather than a G. Some single base substitutions have been detected from IDDM patients at the 5'-flanking region of the S box and between X box and Y box. Particularly, the insertion of CCA bases has been identified at the position between -157 and -158 in a IDDM patient. These data suggest that the polymorphism of HLA-DQA1 promoter region may play a role in susceptibility to IDDM.
authors.affiliation: Institute of Basic Medical Sciences, CAMS, Beijing.
authors.forename: C
authors.initials: C
authors.lastname: Qiu
authors.forename: M
authors.initials: M
authors.lastname: Fang
authors.forename: X
authors.initials: X
authors.lastname: Zhu
authors.forename: Z
authors.initials: Z
authors.lastname: Du
authors.forename: W
authors.initials: W
authors.lastname: Zhou
mesh_terms: D000328:Adult; D044466:Asian People; D001483:Base Sequence; D002681:China; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics*; D004198:Disease Susceptibility; D006683:HLA-DQ Antigens / Q000235:genetics*; D059848:HLA-DQ alpha-Chains; D006801:Humans; D008875:Middle Aged; D008969:Molecular Sequence Data; D009154:Mutation; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic; D017422:Sequence Analysis, DNA
chemical_list: D006683:HLA-DQ Antigens; D059848:HLA-DQ alpha-Chains; C069050:HLA-DQA1 antigen