What is an HLA allele?

What is an HLA allele?

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.

How many alleles does HLA have?

Although less polymorphic than the classical class I genes, HLA-G is the most polymorphic of the class Ib genes with 44 alleles that encode 14 unique proteins. Assembly and expression of the HLA-G trimolecular complex (HLA-G heavy chain, β2m and peptide) is identical to classical MHC class I molecules.

What does HLA stand for?

HLA stands for Human Leukocyte Antigen. HLA antigens are proteins found on most cells in your body. These antigens are inherited as a unique set from your parents. They allow for the regulation of your immune system.

What are HLA variants?

HLA is the human version of the major histocompatibility complex (MHC), a gene family that occurs in many species. Genes in this complex are categorized into three basic groups: class I, class II, and class III. In humans, the HLA-B gene and two related genes, HLA-A and HLA-C, are the main genes in MHC class I.

Are HLA antibodies naturally occurring?

Introduction: HLA antibodies are stimulated primarily by exposure to non-self HLA through organ transplantation, blood transfusion, or pregnancy. The occurrence of HLA antibodies in untransfused, untransplanted male subjects has been assumed to be a naturally occurring phenomenon in the absence of exposure to HLA.

What does HLA stand for in immunology?

Human leukocyte antigen complex Immunology A system of genes unique to a person and statistically shared with 1 in 4 siblings; HLA regions are within the major histocompatibility complex– MHC , on the short arm of chromosome 6, 32 centimorgans from the centromere , divided into 3 classes.

What are the HLA genes?

The human leukocyte antigen (HLA) system or complex is a gene complex encoding the major histocompatibility complex ( MHC ) proteins in humans. These cell-surface proteins are responsible for the regulation of the immune system in humans. The HLA gene complex resides on a 3 Mbp stretch within chromosome 6p21.

What does HLA_DR stand for in medical?

HLA-DR is a shorter form of HLA-DR means human leukocyte antigen-D related HLA-DR is an abbreviation for human leukocyte antigen-D related