major histocompatibility complex, class II, DQ beta 1
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L HLA-DQB1 gene provides instructions for making a protein that plays a critical role in the immune system. The HLA-DQB1 gene is part of a family of genes called the human leukocyte antigen (HLA) complex. The HLA complex helps the immune system distinguish the body's own proteins from proteins made by foreign invaders such as viruses and bacteria.
Normal function
L HLA-DQB1 gene provides instructions for making a protein that plays a critical role in the immune system. The HLA-DQB1 gene is part of a family of genes called the human leukocyte antigen (HLA) complex. The HLA complex helps the immune system distinguish the body's own proteins from proteins made by foreign invaders such as viruses and bacteria.
The HLA complex is the human version of the major histocompatibility complex (MHC), a gene family that occurs in many species. The HLA-DQB1 gene belongs to a group of MHC genes called MHC class II. MHC class II genes provide instructions for making proteins that are present on the surface of certain immune system cells. These proteins attach to protein fragments (peptides) outside the cell. MHC class II proteins display these peptides to the immune system. If the immune system recognizes the peptides as foreign (such as viral or bacterial peptides), it triggers a response to attack the invading viruses or bacteria.
The protein produced from the HLA-DQB1 gene attaches (binds) to the protein produced from another MHC class II gene, HLA-DQA1. Together, they form a functional protein complex called an antigen-binding DQαβ heterodimer. This complex displays foreign peptides to the immune system to trigger the body's immune response.
Each MHC class II gene has many possible variations, allowing the immune system to react to a wide range of foreign invaders. Researchers have identified hundreds of different versions (alleles) of the HLA-DQB1 gene, each of which is given a particular number (such as HLA-DQB1*06:02).
Conditions referring to this gene or chromosome
Altri nomi
CELIAC1
DQB1_HUMAN
HLA class II histocompatibility antigen, DQ beta 1 chain
HLA-DQB
IDDM1
major histocompatibility complex class II beta
MHC class II antigen DQB1
MHC class II antigen HLA-DQ-beta-1
MHC class II DQ beta chain
MHC class II HLA-DQ beta glycoprotein
MHC class2 antigen
MHC DQ beta
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Ulteriori letture e riferimenti
- major histocompatibility complex, class II, DQ beta 1; MedlinePlus, National Library of Medicine.
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