major histocompatibility complex (human), class I, B18 | ||
Alleles | B*1801 | |
Alleles | B*1802 | |
Alleles | B*1803 | |
Structure (See HLA-B) | ||
Symbol(s) | HLA-B | |
EBI-HLA | B*1801 | |
EBI-HLA | B*1802 | |
EBI-HLA | B*1803 | |
Locus | chr.6 6p21.31 | |
HLA-B18 (B18) is an HLA-B serotype. The serotype identifies the more common HLA-B*18 gene products. [1] (For terminology help see: HLA-serotype tutorial) B*1801, the most common allele is at highest frequencies in Northern Italy and the Balkans, a peak frequency distribution it shares with B*3501.
B*18:06 is one of the four B alleles that reacts with neither Bw4 nor Bw6. The others are B*46:01, B*55:03, and B*73:01. [2]
B*18 | B18 | Sample | |
allele | % | % | size (N) |
1801 | 96 | 1641 | |
1802 | 90 | 31 | |
1803 | 83 | 29 |
freq | ||
ref. | Population | (%) |
[4] | Italy North pop 1 | 16.7 |
[4] | Croatia | 11.3 |
[4] | Georgia Svaneti Svans | 11.3 |
[4] | Romanian | 11.3 |
[4] | Portugal South | 11.2 |
[4] | Singapore Riau Malay | 9.9 |
[4] | Bulgaria | 9.1 |
[4] | Israel Arab Druse | 8.5 |
[4] | Azores Central Islands | 8.0 |
[4] | Portugal Centre | 8.0 |
[4] | Finland | 7.8 |
[4] | Azores Santa Maria and Sao Miguel | 7.7 |
[4] | Czech Republic | 7.5 |
[4] | India Jalpaiguri Toto | 7.5 |
[4] | Iran Baloch | 7.1 |
[4] | Philippines Ivatan | 7.0 |
[4] | Thailand | 6.7 |
[4] | Tunisia | 6.7 |
[4] | Portugal North | 6.5 |
[4] | Zimbabwe Harare Shona | 6.4 |
[4] | Madeira | 6.2 |
[4] | Mexico Mestizos | 6.1 |
[4] | Kenya | 5.9 |
[4] | Belgium | 5.1 |
[4] | Morocco Nador Metalsa Class I | 5.1 |
[4] | Singapore Javanese Indonesians | 5.1 |
[4] | Israel Ashkenazi and Non Ashkenazi Jews | 5.0 |
[4] | Uganda Kampala | 5.0 |
[4] | Kenya Nandi | 4.8 |
[4] | Oman | 4.7 |
[4] | Georgia Tbilisi Georgians | 4.6 |
[4] | Bulgaria Gipsy | 4.5 |
[4] | France South East | 4.3 |
[4] | Kenya Luo | 4.3 |
[4] | Ireland South | 4.2 |
[4] | Russia Arkhangelsk Pomors | 4.0 |
[4] | Azores Terceira Island | 3.9 |
[4] | Guinea Bissau | 3.8 |
[4] | India New Delhi | 3.8 |
[4] | Spain Eastern Andalusia Gipsy | 3.5 |
[4] | Australia New South Wales | 3.4 |
[4] | Georgia Tbilisi Kurds | 3.4 |
[4] | Zambia Lusaka | 3.4 |
[4] | Cameroon Yaounde | 2.7 |
[4] | Senegal Niokholo Mandenka | 2.7 |
[4] | Cameroon Beti | 2.3 |
[4] | Ivory Coast Akan Adiopodoume | 2.3 |
[4] | Sudanese | 2.3 |
[4] | Saudi Arabia Guraiat and Hail | 2.2 |
[4] | South African Natal Zulu | 2.0 |
[4] | Thailand | 2.0 |
[4] | India Mumbai Marathas | 1.9 |
[4] | New Caledonia | 1.9 |
[4] | Papua New Guinea Wanigela | 1.5 |
[4] | Cameroon Bamileke | 1.3 |
HLA-A69 (A69) is a human leukocyte antigen serotype within HLA-A serotype group. The serotype is determined by the antibody recognition of α69 subset of HLA-A α-chains. For A69, the alpha "A" chain are encoded by the HLA-A*69 allele group and the β-chain are encoded by B2M locus. This group currently is dominated by A*6901. A69 and A*69 are almost synonymous in meaning. A69 is a split antigen of the broad antigen serotype A28. A69 is a sister serotype of A68.
HLA-B*82 (B*82) is an HLA-B allele-group. There is no current useful serotyping for HLA-B*82 gene products. B*8201 was first identified by sequence analysis and appears to be derived by gene conversion between B*5602 and another HLA class I allele., later B*8202 was identified in a caucasian and was suggested to be ancestral to B*8201, as product between gene conversion of B*5602 allele and B*4501 allele. B*82 is more common in East Africa, Kenya and Sudan, the frequency of B*8201 is found in the peoples to the west, sporadically in Central and West Africa, B*8202 is found in Sudan and Saudi Arabia.
HLA-B78 (B78) is an HLA-B serotype. The serotype identifies the more common HLA-B*78 gene products. B78 is more common in West and North Africa, but is also scattered at low frequencies in parts of Asia.
HLA-B73 (B73) is an HLA-B serotype. The serotype identifies the HLA-B*7301 gene product. Part of B*7301 is similar to the HLA-B22 family, however part resembles the domains seen in other apes. B73 is more common in Western Indian Ocean, Mediterranean and Africa.
HLA-B67 (B67) is an HLA-B serotype. The serotype identifies the more common HLA-B*67 gene products. B67 is region specific recombinant haplotype formed by the gene conversion of B*39, an allele common along the Northwest Pacific Rim, and B7, B22, or B27.
HLA-B59 (B59) is an HLA-B serotype. The serotype identifies the more common HLA-B*## gene products. B59 is a hybrid between B*55 and B*51. B59 is more common in Japan, Korea, N. China and Mongolia.
HLA-B53 (B53) is an HLA-B serotype. The serotype identifies the more common HLA-B*53 gene products. The B53 sequence is identical to B35 but short sequence specifies a Bw4 rather than a Bw6 motif, indicating B53 is a recent product of gene conversion. This suggests an origin for HLA-B53 involving a gene conversion of HLA-B35 by an allele containing this Bw4 sequence.
HLA-B46 (B46) is an HLA-B serotype. The serotype identifies the gene products of HLA-B*4601 allele. B*4601 resulted from a rare, interlocus, gene conversion between B62, probably B*1501, and a HLA-C allele. B*4601 is the most common HLA-B allele that does not have an origin within Africa, and estimated 400 million people in Eastern Asia carry a B46 allele. When found B*4601 segregates with only 2 HLA-Cw alleles, A limited number of HLA-A and HLA-DRB1 alleles suggesting that the allele recently expanded from a limited sized group within SE Asia. Extremely low frequencies outside of Eastern Asia are indicators of a recent expansion of B46 from a recently small population. The frequency distribution suggests the ancestral B46 population was in SE China, or, potentially Burma. B46 in Asia correlates with wet-rice farming. The exceptions are notable, it has been found in the Nivkhi on north-eastern Sakalin Island, the Ainu, and the Nivkhi-related (genetically) Tlinglet population of Alaska at trace levels.
HLA-B41 (B41) is an HLA-B serotype. The serotype identifies HLA-B*4101, *4102, *4103 gene products.
HLA-B37 (B37) is an HLA-B serotype. The serotype identifies the more common HLA-B*37 gene products.
HLA-B13 (B13) is an HLA-B serotype. The serotype identifies the more common HLA-B*13 gene products.
HLA-B8 (B8) is an HLA-B serotype. The serotype identifies the HLA-B*08 gene products. HLA-B8, previously known as HL-A8 was one of the first identified of the HLA antigens. It coined the "Super B8" haplotype, also called the ancestral European haplotype because of its common occurrence in Europe, particular the isles and Scandinavia. B8 is a component gene-allele of the AH8.1 haplotype in Northern and Western Europeans. Genes between B8 and DR3 on this haplotype are frequently associated with autoimmune disease.
HLA-B56 (B56) is an HLA-B serotype. B56 is a split antigen from the B22 broad antigen, sister serotypes are B54 and B55. The serotype identifies the more common HLA-B*56 gene products.
HLA-B55 (B55) is an HLA-B serotype. B55 is a split antigen from the B22 broad antigen, sister serotypes are B54 and B56. The serotype identifies the more common HLA-B*55 gene products.
HLA-B54 (B54) is an HLA-B serotype. B54 is a split antigen from the B22 broad antigen, sister serotypes are B55 and B56. The serotype identifies the more common HLA-B*55 gene products.
HLA-B50 (B50) is an HLA-B serotype. B50 is a split antigen from the B21 broad antigen, the sister serotype B49. The serotype identifies the more common HLA-B*50 gene products.
HLA-B49 (B49) is an HLA-B serotype. B49 is a split antigen from the B21 broad antigen, the sister serotype B50. The serotype identifies the more common HLA-B*50 gene products.
HLA-B51 (B51) is an HLA-B serotype. The serotype identifies the more common HLA-B*51 gene products.
HLA-B38 (B38) is an HLA-B serotype. The serotype identifies the B*38 allele products of the HLA-B gene-locus.
HLA-B63 (B63) is an HLA-B serotype. The serotype identifies certain B*15 gene-allele protein products of HLA-B.