title: Sequence-based typing of HLA class I alleles in Alaskan Yupik Eskimo.
abstract: In comparison to South America, native North Americans tend to be less diverse in their repertoire of HLA class I alleles. Based upon this observation, we hypothesized that the Yupik Eskimo would exhibit a limited number of previously identified class I HLA alleles. To test this hypothesis, sequence-based typing was performed at the HLA-A, -B and -C loci for 99 Central Yupik individuals from southwestern Alaska. Two new class I alleles, A*2423 and Cw*0806, were identified. While A*2423 was observed in only one sample, Cw*0806 was present in 26 of the 99 individuals and all of the Cw*0806 samples contained B*4801. Allele Cw*0806 differs from Cw*0803 by a single nucleotide substitution such that Cw*0803 may be the progenitor of Cw*0806. Allele Cw*0803 was originally characterized as unique to South America, but detection of Cw*0803 in the Yupik indicates that Cw*0803 was a founding allele of the Americas. The presence of new alleles and previously unrecognized founding alleles in the Yupik population show that natives of North America are more diverse than previously envisioned.
authors.affiliation: University of Oklahoma Health Sciences Center, 975 NE 10th Street, Oklahoma City, OK 73104, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Ellexson-Turner
authors.forename: M S
authors.initials: MS
authors.lastname: Leffell
authors.forename: A A
authors.initials: AA
authors.lastname: Zachary
authors.forename: S
authors.initials: S
authors.lastname: Turner
authors.forename: T
authors.initials: T
authors.lastname: Bennett
authors.forename: D A
authors.initials: DA
authors.lastname: Sidebottom
authors.forename: K
authors.initials: K
authors.lastname: Cao
authors.forename: M
authors.initials: M
authors.lastname: Fernández-Viña
authors.forename: W H
authors.initials: WH
authors.lastname: Hildebrand
mesh_terms: D000413:Alaska / Q000208:ethnology; D000483:Alleles; D001483:Base Sequence; D018076:DNA, Complementary; D015234:HLA-A Antigens / Q000145:classification / Q000235:genetics; D015235:HLA-B Antigens / Q000145:classification / Q000235:genetics; D015236:HLA-C Antigens / Q000145:classification / Q000235:genetics; D015395:Histocompatibility Antigens Class I / Q000145:classification / Q000235:genetics*; D006650:Histocompatibility Testing; D006801:Humans; D004930:Inuit / Q000235:genetics*; D008969:Molecular Sequence Data
chemical_list: D018076:DNA, Complementary; D015234:HLA-A Antigens; D015235:HLA-B Antigens; D015236:HLA-C Antigens; D015395:Histocompatibility Antigens Class I