HLA-DRA

HLA-DRA is one of the HLA class II alpha chain paralogues. This class II molecule is a heterodimer consisting of an alpha and a beta chain, both anchored in the membrane. This molecule is expressed on the surface of various antigen presenting cells such as B lymphocytes, dendritic cells, and monocytes/macrophages, and plays a central role in the immune system and response by presenting peptides derived from extracellular proteins, in particular, pathogen-derived peptides to T cells. The alpha chain is approximately 33-35 kDa and its gene contains 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. DRA does not have polymorphisms in the peptide binding part and acts as the sole alpha chain for DRB1, DRB3, DRB4 and DRB5. [provided by RefSeq, Aug 2020]

Description

Major histocompatibility complex, class II, DR alpha

Tissue specificity

Tissue enhanced (lung, lymphoid tissue)

Predicted location

Membrane

Protein family

Mapped to neXtProt
Mapped to UniProt SWISS-PROT
Plasma proteins
Predicted membrane proteins
Protein evidence (Ezkurdia et al 2014)
Protein evidence (Kim et al 2014)

Chromosome

6 (32439878 - 32445046)

Ensembl ID

ENSG00000204287  (ver. 103.38)

Orthologs

Mouse H2-Ea: ENSMUSG00000036322

UniProt

P01903

neXtProt

NX_P01903

Human splice variants
Mouse splice variants

Protein structure