[Cloning and sequencing HLA-A and -B genomic DNA and analyzing polymorphism in regulatory regions in Chinese Han individuals].
In the present study, a high-resolute method for cloning and sequencing genomic full-length HLA-A and -B using 20 Chinese Han individuals was established. We detected 10 HLA-A allele sequences 4.2 kb in length and 6 HLA-B allele sequences 3.7 kb in length, and the sequences included all exons, all introns, 5'promoter, and 3'UTR of the two genes. All sixteen sequences have been submitted to GenBank and IMGT/HLA database. A*1153 is a novel allele, and the introns of B*151101 are firstly reported here. The 5'promoter and 3'UTR sequences of 5 HLA-A alleles and 2 HLA-B alleles are also firstly disclosed, and all other alleles have extended the genomic full length sequences released in IMGT/HLA database. The polymorphic structures of upper 5'promoter and downstream 3'UTR, which were uncovered in IMGT/HLA database, are firstly depicted in Chinese Han individuals. Twenty-six single nucleotide polymorphisms (SNPs) and one 3 bp-insertion/deletion (Indel) were located in the upper 5'promoter and 14 SNPs were located in the 3'UTR of HLA-A. In addition, five SNPs and one 1 bp-indel were located in the upper 5'promoter and 5 SNPs were located in the 3'UTR of HLA-B. Through analyzing the phylogenetic trees of 5'promoter, exons and 3'UTR of the two genes, we found that the evolution history of regulatory regions and exons is different between the two genes. The regulatory regions are tightly linked with exons in most of HLA-A alleles excluding A*24020101. On the contrary, recombinant events may occur frequently between regulatory regions and exons in most HLA-B alleles.
Xu
Yun-Ping
YP
Shenzhen Key Laboratory of Histocompatibility and Immunogenetics, ShenZhen Blood Center, Shenzhen 518035, China. yunpingxu1982@yahoo.com.cn
Deng
Zhi-Hui
ZH
Zou
Hong-Yan
HY
Gao
Su-Qing
SQ
Wang
Da-Ming
DM
He
Liu-Mei
LM
Wei
Tian-Li
TL
D020413:3' Untranslated Regions / Q000235:genetics; D000483:Alleles; D044466:Asian People / Q000235:genetics; D004247:DNA / Q000235:genetics; D005091:Exons / Q000235:genetics; D015234:HLA-A Antigens / Q000145:classification / Q000235:genetics*; D015235:HLA-B Antigens / Q000145:classification / Q000235:genetics*; D006801:Humans; D016254:Mutagenesis, Insertional; D010802:Phylogeny; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D011401:Promoter Regions, Genetic / Q000235:genetics; D017384:Sequence Deletion / Q000235:genetics
D020413:3' Untranslated Regions; D015234:HLA-A Antigens; D015235:HLA-B Antigens; D004247:DNA