Version: 8.0.0
Date: Tue Jan 28 2025
HTT
Homo sapiensHGNC:4851
SummaryOrthologyParalogyFunction - GO AnnotationsPathwaysPhenotypesDisease AssociationsAlleles and VariantsTransgenic AllelesModelsSequence Feature ViewerSequence DetailsExpressionMolecular InteractionsGenetic Interactions
Gene

HTT

Species
Homo sapiens
Symbol
HTT
Name
huntingtin
Synonyms
  • HD
  • huntington disease gene homolog
Biotype
protein coding gene
Automated Description
Enables several functions, including cytoskeletal protein binding activity; dynein intermediate chain binding activity; and p53 binding activity. Involved in several processes, including positive regulation of macroautophagy; protein destabilization; and regulation of signal transduction. Acts upstream of or within positive regulation of cilium assembly. Located in several cellular components, including autophagosome; centriole; and cytoplasmic vesicle. Part of protein-containing complex. Is active in postsynaptic cytosol and presynaptic cytosol. Implicated in Huntington's disease and Parkinson's disease. Biomarker of Huntington's disease.
RGD Description
Huntingtin is a disease gene linked to Huntington's disease, a neurodegenerative disorder characterized by loss of striatal neurons. This is thought to be caused by an expanded, unstable trinucleotide repeat in the huntingtin gene, which translates as a polyglutamine repeat in the protein product. A fairly broad range of trinucleotide repeats (9-35) has been identified in normal controls, and repeat numbers in excess of 40 have been described as pathological. The huntingtin locus is large, spanning 180 kb and consisting of 67 exons. The huntingtin gene is widely expressed and is required for normal development. It is expressed as 2 alternatively polyadenylated forms displaying different relative abundance in various fetal and adult tissues. The larger transcript is approximately 13.7 kb and is expressed predominantly in adult and fetal brain whereas the smaller transcript of approximately 10.3 kb is more widely expressed. The genetic defect leading to Huntington's disease may not necessarily eliminate transcription, but may confer a new property on the mRNA or alter the function of the protein. One candidate is the huntingtin-associated protein-1, highly expressed in brain, which has increased affinity for huntingtin protein with expanded polyglutamine repeats. This gene contains an upstream open reading frame in the 5' UTR that inhibits expression of the huntingtin gene product through translational repression. [provided by RefSeq, Jul 2016]
Cross References
Additional Information
Literature

Orthology

Gene tree
PANTHER:PTHR10170
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
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          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

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

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