Version: 8.0.0
Date: Tue Jan 28 2025
CD8A
Homo sapiensHGNC:1706
SummaryOrthologyParalogyFunction - GO AnnotationsPathwaysPhenotypesDisease AssociationsAlleles and VariantsTransgenic AllelesModelsSequence Feature ViewerSequence DetailsExpressionMolecular InteractionsGenetic Interactions
Gene

CD8A

Species
Homo sapiens
Symbol
CD8A
Name
CD8 subunit alpha
Synonyms
  • CD8
  • cd8 antigen, alpha chain
Biotype
protein coding gene
Automated Description
Enables MHC class I protein complex binding activity. Involved in T cell activation and T cell receptor signaling pathway. Located in external side of plasma membrane and plasma membrane raft. Part of receptor complex. Implicated in primary immunodeficiency disease. Biomarker of COVID-19; acquired immunodeficiency syndrome; erythema multiforme; and stomach cancer.
RGD Description
The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. The CD8 antigen acts as a coreceptor with the T-cell receptor on the T lymphocyte to recognize antigens displayed by an antigen presenting cell in the context of class I MHC molecules. The coreceptor functions as either a homodimer composed of two alpha chains or as a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains. This gene encodes the CD8 alpha chain. Multiple transcript variants encoding different isoforms have been found for this gene. The major protein isoforms of this gene differ by the presence or absence of a transmembrane domain and thus differ in being a membrane-anchored or secreted protein. [provided by RefSeq, May 2020]
Cross References
Additional Information
Literature

Orthology

Gene tree
PANTHER:PTHR10441
Links to orthology data in JBrowse by filter level: Stringent,  Moderate,  No filter,  Best and Best Reverse

Paralogy

Function - GO Annotations

Pathways

No data available

Phenotypes

Primary Sources
None
Other Sources
Phenotype Term
Annotation details
References
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    Disease Associations

    Cases where the expected disease association was NOT found
    Cell color indicative of annotation volume
    No data available

    Alleles and Variants

    Allele/Variant Symbol
    Allele Synonyms
    Category
    Variant
    Variant type
    Molecular consequence
    Has Disease Annotations
    Has Phenotype Annotations
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      Transgenic Alleles

      Species
      (carrying the transgene)
      Allele symbol
      Transgenic construct
      Expressed components
      Knock-down targets
      Regulatory regions
      Has Disease Annotations
      Has Phenotype Annotations
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        Models

        Model name
        Experimental condition
        Associated Human Diseases
        Associated Phenotypes
        Modifier
        Source
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          Sequence Feature Viewer

          Genome location
          Assembly version
          GRCh38
          Viewer Help
          Data currently unavailable; sequence viewer under construction

          Sequence Details

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          Expression

          Primary Sources
          None
          Other Sources
          Cell color indicative of annotation volume; red slash indicates species lacks structure or developmental stage.

          Molecular Interactions

          CD8A molecule type
          Interactor gene
          Interactor species
          Interactor molecule type
          Detection methods
          Source
          Reference
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            Genetic Interactions

            CD8A role
            CD8A genetic perturbation
            Interactor gene
            Interactor species
            Interactor role
            Interactor genetic perturbation
            Interaction type
            Phenotype or trait
            Source
            Reference
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