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About: HLA-A

An Entity of Type: gene, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

HLA-A is a group of human leukocyte antigens (HLA) that are encoded by the HLA-A locus, which is located at human chromosome 6p21.3. HLA is a major histocompatibility complex (MHC) antigen specific to humans. HLA-A is one of three major types of human MHC class I transmembrane proteins. The others are HLA-B and HLA-C. The protein is a heterodimer, and is composed of a heavy α chain and smaller β chain. The α chain is encoded by a variant , and the β chain (β2-microglobulin) is an invariant β2 microglobulin molecule. The β2 microglobulin protein is encoded by the B2M gene, which is located at chromosome 15q21.1 in humans.

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dbo:abstract
  • مستضد الكريات البيضاء البشرية-أ ويُعرف اختصارًا HLA-A، هو مجموعةٌ من مستضدات الكريات البيضاء البشرية، ويُشفر بالموقع الكروموسومي HLA-A، والذي يقع على الكروموسوم البشري 6p21.3. (ar)
  • HLA-A is a group of human leukocyte antigens (HLA) that are encoded by the HLA-A locus, which is located at human chromosome 6p21.3. HLA is a major histocompatibility complex (MHC) antigen specific to humans. HLA-A is one of three major types of human MHC class I transmembrane proteins. The others are HLA-B and HLA-C. The protein is a heterodimer, and is composed of a heavy α chain and smaller β chain. The α chain is encoded by a variant , and the β chain (β2-microglobulin) is an invariant β2 microglobulin molecule. The β2 microglobulin protein is encoded by the B2M gene, which is located at chromosome 15q21.1 in humans. MHC Class I molecules such as HLA-A are part of a process that presents short polypeptides to the immune system. These polypeptides are typically 7-11 amino acids in length and originate from proteins being expressed by the cell. There are two classes of polypeptide that can be presented by an HLA protein: those that are supposed to be expressed by the cell (self) and those of foreign derivation (non-self). Under normal conditions cytotoxic T cells, which normally patrol the body in the blood, "read" the peptide presented by the complex. T cells, if functioning properly, only bind to non-self peptides. If binding occurs, a series of events is initiated culminating in cell death via apoptosis. In this manner, the human body eliminates any cells infected by a virus or expressing proteins they shouldn't be (e.g. cancerous cells). For humans, as in most mammalian populations, MHC Class I molecules are extremely variable in their primary structure, and HLA-A is ranked among the genes in humans with the fastest-evolving coding sequence. As of March 2022, there are 7,452 known HLA-A alleles coding for 4,305 active proteins and 375 null proteins.This level of variation on MHC Class I is the primary cause of transplant rejection, as random transplantation between donor and host is unlikely to result in a matching of HLA-A, B or C antigens. Evolutionary biologists also believe that the wide variation in HLAs is a result of a balancing act between conflicting pathogenic pressures. Greater variety of HLAs decreases the probability that the entire population will be wiped out by a single pathogen as certain individuals will be highly resistant to each pathogen. The effect of HLA-A variation on HIV/AIDS progression is . (en)
  • HLA-A是人類白細胞抗原(HLA)的一个基因座位于6号染色体的6p21.3。 (zh)
  • HLA-A (англ. HLA class I histocompatibility antigen, A-3 alpha chain) – білок, який кодується однойменним геном, розташованим у людей на короткому плечі 6-ї хромосоми. Довжина поліпептидного ланцюга білка становить 365 амінокислот, а молекулярна маса — 40 841. Послідовність амінокислот A: АланінC: ЦистеїнD: Аспарагінова кислотаE: Глутамінова кислотаF: ФенілаланінG: ГліцинH: ГістидинI: ІзолейцинK: ЛізинL: ЛейцинM: МетіонінN: АспарагінP: ПролінQ: ГлутамінR: АргінінS: СеринT: ТреонінV: ВалінW: Триптофан Y: Тирозин Кодований геном білок за функцією належить до фосфопротеїнів. Задіяний у таких біологічних процесах, як імунітет, взаємодія хазяїн-вірус. Локалізований у мембрані. (uk)
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dbp:function
  • Peptide presentation for immune recognition (en)
dbp:gene
dbp:heteropolymer
  • MHC class I, A (en)
dbp:imageSource
  • Illustration of HLA-A (en)
dbp:locus
  • Chromosome 15q22 (en)
  • Chromosome 6p21.3 (en)
dbp:polymerType
  • heterodimer (en)
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  • α (en)
  • β2M (en)
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  • 2 (xsd:integer)
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  • مستضد الكريات البيضاء البشرية-أ ويُعرف اختصارًا HLA-A، هو مجموعةٌ من مستضدات الكريات البيضاء البشرية، ويُشفر بالموقع الكروموسومي HLA-A، والذي يقع على الكروموسوم البشري 6p21.3. (ar)
  • HLA-A是人類白細胞抗原(HLA)的一个基因座位于6号染色体的6p21.3。 (zh)
  • HLA-A is a group of human leukocyte antigens (HLA) that are encoded by the HLA-A locus, which is located at human chromosome 6p21.3. HLA is a major histocompatibility complex (MHC) antigen specific to humans. HLA-A is one of three major types of human MHC class I transmembrane proteins. The others are HLA-B and HLA-C. The protein is a heterodimer, and is composed of a heavy α chain and smaller β chain. The α chain is encoded by a variant , and the β chain (β2-microglobulin) is an invariant β2 microglobulin molecule. The β2 microglobulin protein is encoded by the B2M gene, which is located at chromosome 15q21.1 in humans. (en)
  • HLA-A (англ. HLA class I histocompatibility antigen, A-3 alpha chain) – білок, який кодується однойменним геном, розташованим у людей на короткому плечі 6-ї хромосоми. Довжина поліпептидного ланцюга білка становить 365 амінокислот, а молекулярна маса — 40 841. Послідовність амінокислот A: АланінC: ЦистеїнD: Аспарагінова кислотаE: Глутамінова кислотаF: ФенілаланінG: ГліцинH: ГістидинI: ІзолейцинK: ЛізинL: ЛейцинM: МетіонінN: АспарагінP: ПролінQ: ГлутамінR: АргінінS: СеринT: ТреонінV: ВалінW: Триптофан Y: Тирозин (uk)
rdfs:label
  • مستضد الكريات البيضاء البشرية-أ (ar)
  • HLA-A (en)
  • HLA-A (zh)
  • HLA-A (uk)
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