DR1 binding pocket with ligand PDB: 2G9H [1] | ||
major histocompatibility complex, class II, DR1 | ||
Haplotypes groups | DRA*01:DRB1*0101 DRA*01:DRB1*0102 DRA*01:DRB1*0103 | |
Structure (See HLA-DR) | ||
Identifiers | alpha *0101 | |
Symbol(s) | HLA-DRA [ permanent dead link ] | |
EBI-HLA | DRA *0101 | |
Identifiers | beta 1 *0101, *0102, *0103 . . . | |
Symbol(s) | HLA-DRB1 [ permanent dead link ] | |
Shared data | ||
Locus | chr.6 6p21.31 | |
HLA-DR1 (DR1) is a HLA-DR serotype that recognizes the DRB1*01 gene products. It has been observed to be common among centenarians. [2] [3] [4]
DRB1* | DR1 | DR103 | Sample | |
allele | % | % | % | size (N) |
*0101 | 97% | 6317 | ||
*0102 | 95% | 2035 | ||
*0103 | 56% | 12% | 1186 | |
*0105 | >50% | 2 | ||
The serology for the most common DR1 alleles is excellent. The serology for alleles *0104 , *0106 , *0109 , *0110 , *0112 , *0115 , and *0116 is unknown.
DR1 is associated with seronegative [6] -rheumatoid arthritis, [7] [8] penicillamine-induced myasthenia, [9] and schizophrenia. [10] DR1 is increased in patients with systemic sclerosis and arthritis [11] and in ulcerative colitis with patients that have articular manifestations. [12]
DRB1*0101 is associated with rheumatoid arthritis, [13] in anti-Jk(a) mediated hemolytic transfusion reactions, [14] foliaceous pemphigus, [15] HTLV-1-associated myelopathy/tropical spastic paraparesis, and [16] lichen planus. [17] In lyme disease arthritis, *0101 appears to play a role in presentation of triggering microbial antigens. [18]
DRB1*0102 is associated with rheumatoid arthritis, [13] in anti-Jk(a) mediated hemolytic transfusion reactions, [14] psoriasis vulgaris, [19] and recurrent respiratory papillomatosis [20]
DRB1*0103 is associated with colonic Crohn's disease [21] and ulcerative colitis. [22] [23]
DRB1*0101/*0404 and *0101/*0401 increases risk of mortality in rheumatoid arthritis, with ischemic heart disease and smoking. [24] these same genotypes are associated with rheumatoid vasculitis. [25]
DRB1*0102:DQB1*0501 is associated with psoriasis vulgaris [19] and tubulointerstitial nephritis & uveitis syndrome, [26] but is relatively protective against juvenile diabetes. [27]
DR1-DQ5 is associate with tubulointerstitial nephritis & uveitis syndrome. [26]
Class | Disease | Associated DR | 2 | 3 | 4 |
---|---|---|---|---|---|
alopecia areata | DR5 | ||||
anemia | pernicious | DR15 | |||
antiphospholipid syndrome, primary | DR5 | DR12 | |||
aneurysm | coronary artery | DR16 | |||
arteritis | Takayasu's | DR16 | |||
arthritis, rheumatoid | juvenile | DR4 | DR5 | DR14 | DR15 |
pauciarticular, juv. | DR8 | ||||
Still's disease | DR12 | ||||
iritis w/juv. arthritis | DR12 | ||||
seropositive | DR1 | DR4 | DR10 | ||
w/systemic sclerosis | DR1 | ||||
lyme disease induced | DR4 | ||||
tiopronin intolerance | DR5 | DR11 | DR12 | ||
cardiomyopathy | hypertrophic | DR4 | DR17 | ||
T. cruzi induced | DR4 | DR7 | DR15 | ||
colitis | Crohn's | DR1 | |||
ulcerative | DR1 | ||||
diabetes | juvenile (type 1) | DR3 | DR4 | DR17 | DR18 |
fatty liver (type 2) | DR8 | ||||
encephalomyelitis | rabies vaccine-induced | DR17 | |||
encephalopathy | acute necrotizing | DR52 | |||
epilepsy | childhood | DR5 | |||
infantile/spasm | DR17 | ||||
heart disease | rheumatic | DR16 | |||
hepatitis | autoimmune | DR2 | DR4 | DR17 | |
primary biliary cirrhosis | DR2 | DR8 | |||
chronic type C | DR11 | ||||
lichen planus | DR1 | DR10 | |||
lupus, | systemic | DR3 | DR4 | DR52 | |
hydralazine-induced | DR4 | ||||
with Sjögren syndrome | DR15 | ||||
lymphadenopathy | generalized | DR5 | |||
lymphoma, | mycosis fungoides | DR5 | |||
melioidosis | DR16 | ||||
myasthenia | gravis | DR3 | DR6 | DR13 | DR14 |
penicillamine-induced | DR1 | ||||
myositis | inflammatory inclusion body | DR17 | DR18 | DR52 | |
narcolepsy | DR2 | DR12 | |||
nephritis, | tubulointerstitial | DR1 | |||
nephropathy | IgA-mediated | DR4 | |||
polyglandular deficiency syndrome | DR5 | ||||
pemphigus | foliaceous | DR1 | |||
vulgaris | DR4 | ||||
psoriasis | vulgaris | DR1 | DR7 | ||
papillomatosis, | respiratory | DR1 | |||
sarcoidosis | non-chronic | DR17 | DR52 | ||
sclerosis, | multiple | DR2 | DR15 | DR53 | |
"bout onset" multiple | DR3 | ||||
systemic | DR4 | DR11 | DR16 | DR52 | |
vulval lichen | DR12 | ||||
schizophrenia | DR1 | ||||
susceptibility | leprosy | DR2 | |||
tuberculosis | DR2 | ||||
ragweed Ra6 allergy | DR5 | ||||
asthma, mite sensitive | DR11 | ||||
2ndary infection, AIDS | DR3 | ||||
aspergillosis | DR15 | ||||
Kaposi's sarcoma | DR5 | ||||
thyroid carcinomas | DR8 | DR11 | |||
ovarian/cervical cancer | DR10 | DR11 | DR15 | ||
grape induced anaphylaxis | DR11 | ||||
Chlamydia pneumoniae | DR52 | ||||
thyroiditis | Hashimoto's | DR3 | DR5 | ||
Graves' | DR3 | DR17 | DR52 | ||
uveitis | tubulointerstitial | DR1 | |||
*references are provided on linked subpages |
DR1 are associated with rheumatoid arthritis, and while not the strongest association with the highest risk for early onset arthritis is within the DR4-bearing Native American population. There frequency of DR4-DQ8 haplotypes reach extreme nodal levels. Arthritis has been identified in a pre-Columbian remains from Italy, the affected individual bearing the DRB1*0101 allele. [28] DRB1*0101 and most DR4 have in common a 'shared epitope'. [29] [30] In this hypothesis a common region of the beta chain, positions 67 to 74, are common and may be integral to presenting auto-immunological peptides.
DR1 Haplotypes | ||||
Serotypes | DRA | DRB1 | ||
---|---|---|---|---|
DR1 | *0101 | *0101 | ||
*0101 | *0102 | |||
*0101 | *0103 | |||
Serotypes | DQA1 | DQB1 | DRB1 | |
DR1-DQ5 (5.1, 1) | *0101 | *0501 | *0101 | |
*0101 | *0501 | *0102 | ||
*0101 | *0501 | *0103 | ||
Serotypes | HLA-A | HLA C | HLA B | DRB1 |
A3-Cw4-B35-DR1 | *0301 | *0401 | *3501 | *0101 |
A11-Cw4-B35-DR1 | *1101 | *0401 | *3501 | *0103 |
A33-Cw8-B14-DR1 | *3301 | *0802 | *1402 | *0102 |
HLA-DR1 is not genetically linked to DR51, DR52 or DR53, but is linked to HLA-DQ1 and DQ5 serotypes.
The human leukocyte antigen (HLA) system or complex is a group of related proteins that are encoded by the major histocompatibility complex (MHC) gene complex in humans. These cell-surface proteins are responsible for the regulation of the immune system. The HLA gene complex resides on a 3 Mbp stretch within chromosome 6p21. HLA genes are highly polymorphic, which means that they have many different alleles, allowing them to fine-tune the adaptive immune system. The proteins encoded by certain genes are also known as antigens, as a result of their historic discovery as factors in organ transplants. Different classes have different functions:
HLA class II histocompatibility antigen, DRB1 beta chain is a protein that in humans is encoded by the HLA-DRB1 gene. DRB1 encodes the most prevalent beta subunit of HLA-DR. DRB1 alleles, especially those encoding amino acid sequence changes at positions 11 and 13, are associated risk of rheumatoid arthritis.
HLA-DQ8 (DQ8) is a human leukocyte antigen serotype within the HLA-DQ (DQ) serotype group. DQ8 is a split antigen of the DQ3 broad antigen. DQ8 is determined by the antibody recognition of β8 and this generally detects the gene product of DQB1*0302.
HLA-DQ2 (DQ2) is a serotype group within HLA-DQ (DQ) serotyping system. The serotype is determined by the antibody recognition of β2 subset of DQ β-chains. The β-chain of DQ is encoded by HLA-DQB1 locus and DQ2 are encoded by the HLA-DQB1*02 allele group. This group currently contains two common alleles, DQB1*0201 and DQB1*0202. HLA-DQ2 and HLA-DQB1*02 are almost synonymous in meaning. DQ2 β-chains combine with α-chains, encoded by genetically linked HLA-DQA1 alleles, to form the cis-haplotype isoforms. These isoforms, nicknamed DQ2.2 and DQ2.5, are also encoded by the DQA1*0201 and DQA1*0501 genes, respectively.
HLA-DQ4 (DQ4) is a serotype subgroup within HLA-DQ(DQ) serotypes. The serotype is determined by the antibody recognition of β4 subset of DQ β-chains. The β-chain of DQ is encoded by HLA-DQB1 locus and DQ4 are encoded by the HLA-DQB1*04 allele group. This group currently contains 2 common alleles, DQB1*0401 and DQB1*0402. HLA-DQ4 and HLA-DQB1*04 are almost synonymous in meaning. DQ4 β-chains combine with α-chains, encoded by genetically linked HLA-DQA1 alleles, to form the cis-haplotype isoforms. These isoforms, nicknamed DQ4.3 and DQ4.4, are also encoded by the DQA1*0303 and DQA1*0401 genes, respectively.
HLA-DQ6 (DQ6) is a human leukocyte antigen serotype within HLA-DQ (DQ) serotype group. The serotype is determined by the antibody recognition of β6 subset of DQ β-chains. The β-chain of DQ isoforms are encoded by HLA-DQB1 locus and DQ6 are encoded by the HLA-DQB1*06 allele group. This group currently contains many common alleles, DQB1*0602 is the most common. HLA-DQ6 and DQB1*06 are almost synonymous in meaning. DQ6 β-chains combine with α-chains, encoded by genetically linked HLA-DQA1 alleles, to form the cis-haplotype isoforms. For DQ6, however, cis-isoform pairing only occurs with DQ1 α-chains. There are many haplotypes of DQ6.
HLA-DQ9 (DQ9) is a human leukocyte antigen serotype within the HLA-DQ (DQ) serotype group. DQ9 is a split antigen of the DQ3 broad antigen. DQ9 is determined by the antibody recognition of β9 and this generally detects the gene product of DQB1*0303.
HLA-DQ1 is a serotype that covers a broad range of HLA-DQ haplotypes. Historically it was identified as a DR-like alpha chain called DC1; later, it was among 3 types DQw1, DQw2 and DQw3. Of these three serotyping specificities only DQw1 recognized DQ alpha chain. The serotype is positive in individuals who bear the DQA1*01 alleles. The most frequently found within this group are: DQA1*0101, *0102, *0103, and *0104. In the illustration on the right, DQ1 serotyping antibodies recognizes the DQ α (magenta), where antibodies to DQA1* gene products bind variable regions close to the peptide binding pocket.
HLA-DR53 is an HLA-DR serotype that recognizes gene products of HLA-DRB4 locus. There are 13 alleles at this locus that encode 7 proteins.
HLA-DR16(DR16) is a HLA-DR serotype that recognizes the DRB1*1601, *1602 and *1604 gene products. DR16 is found in the Mediterranean at modest frequencies. DR16 is part of the older HLA-DR2 serotype group which also contains the similar HLA-DR15 antigens.
HLA-DR15 (DR15) is a HLA-DR serotype that recognizes the DRB1*1501 to *1505 and *1507 gene products. DR15 is found at high levels from Ireland to Central Asia. DR15 is part of the older HLA-DR2 serotype group which also contains the similar HLA-DR16 antigens.
HLA-DR14(DR14) is a HLA-DR serotype that recognizes the DRB1*1401 to *1408, *1410 to *1418, and other *14 gene products. DR14 serotype is a split antigen of the older HLA-DR6 serotype group which also contains the similar HLA-DR13 antigens.
HLA-DR11 (DR11) is a HLA-DR serotype that recognizes the DRB1*1101 to *1110. DR11 serotype is a split antigen of the older HLA-DR5 serotype group which also contains the similar HLA-DR12 antigens.
HLA-DR12(DR12) is a HLA-DR serotype that recognizes the DRB1*1201 to *1203, *1206. DR12 serotype is a split antigen of the older HLA-DR5 serotype group which also contains the similar HLA-DR11 antigens.
HLA-DR10 (DR10) is a HLA-DR serotype that recognizes the DRB1*1001 gene product.
HLA-DR5 (DR5) is a broad-antigen serotype that is further split into HLA-DR11 and HLA-DR12 antigen serotypes.
HLA-DR2 (DR2) of the HLA-DR serotype system, is a broad antigen serotype that is now preferentially covered by HLA-DR15 and HLA-DR16 serotype group. This serotype primarily recognizes gene products of the HLA-DRB1*15 and HLA-DRB1*16 allele groups.
HLA-DR3 is composed of the HLA-DR17 and HLA-DR18 split 'antigens' serotypes. DR3 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. Type 1 diabetes mellitus is strongly associated with HLA-DR3 or HLA-DR4.
HLA-DR4 (DR4) is an HLA-DR serotype that recognizes the DRB1*04 gene products. The DR4 serogroup is large and has a number of moderate frequency alleles spread over large regions of the world.
In autoimmune disease, anti-apolipoprotein H (AAHA) antibodies, also called anti-β2 glycoprotein I antibodies, comprise a subset of anti-cardiolipin antibodies and lupus anticoagulant. These antibodies are involved in sclerosis and are strongly associated with thrombotic forms of lupus. As a result AAHA are strongly implicated in autoimmune deep vein thrombosis.