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Heterogeneity of HLA‐G Genes Identified by Polymerase Chain Reaction/Single Strand Conformational Polymorphism (PCR/SSCP)
Author(s) -
Tamaki Junko,
Arimura Yutaka,
Koda Toshiaki,
Fujimoto Seiichiro,
Fujino Takafumi,
Wakisaka Akemi,
Kakinuma Mitsuaki
Publication year - 1993
Publication title -
microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 70
eISSN - 1348-0421
pISSN - 0385-5600
DOI - 10.1111/j.1348-0421.1993.tb01686.x
Subject(s) - biology , genetics , microbiology and biotechnology , single strand conformation polymorphism , genomic dna , polymerase chain reaction , gene , exon , allele , human leukocyte antigen , complementary dna , antigen
A genomic HLA‐G clone named 7.0E was isolated from a Japanese placenta. The deduced amino acid sequence of the 7.0E was identical to two HLA‐G genomic clones and two cDNA clones previously described. The DNA sequences of α 1 and α 2 domains of the HLA‐G gene from 5 cell lines also encoded the same amino acids. However, a 14 bp insertion, ATTTGTTCATGCCT, was present in the 3′ untranslated region of 7.0E compared with the originally described HLA‐G clone (HLA 6.0). Polymerase chain reaction (PCR)/single strand conformational polymorphism (SSCP) analysis of exon 8 allowed the HLA‐G gene to be classified into two alternative types, G6.0 and 7.0 E, those correlated to the absence or the presence of the 14 bp stretch. Each group had minor sequence variant(s), and the alleles of the 7.0E‐type were more heterogeneous than those of the G6.0‐ type. The 14 bp deletion is present only in the G6.0‐type of HLA‐G alleles among HLA class I genes. Thus it was suggested that G6.0 alleles were generated after diversification of the HLA‐G.