HLA-DQA1

HLA-DQA1 belongs to the HLA class II alpha chain paralogues. The class II molecule is a heterodimer consisting of an alpha (DQA) and a beta chain (DQB), both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B Lymphocytes, dendritic cells, macrophages). The alpha chain is approximately 33-35 kDa. It is encoded by 5 exons; exon 1 encodes the leader peptide, exons 2 and 3 encode the two extracellular domains, and exon 4 encodes the transmembrane domain and the cytoplasmic tail. Within the DQ molecule both the alpha chain and the beta chain contain the polymorphisms specifying the peptide binding specificities, resulting in up to four different molecules. Typing for these polymorphisms is routinely done for bone marrow transplantation. [provided by RefSeq, Jul 2008]

Description

Major histocompatibility complex, class II, DQ alpha 1

Tissue specificity

Tissue enhanced (lung, lymphoid tissue)

Predicted location

Intracellular, Membrane

Protein family

Human disease related genes
Mapped to neXtProt
Mapped to UniProt SWISS-PROT
Predicted intracellular proteins
Predicted membrane proteins
Protein evidence (Ezkurdia et al 2014)
Protein evidence (Kim et al 2014)
Transporters

Chromosome

6 (32628179 - 32647062)

Ensembl ID

ENSG00000196735  (ver. 103.38)

Orthologs

-

UniProt

P01909

neXtProt

NX_P01909

Human splice variants

Protein structure