Version: 8.0.0
Date: Tue Jan 28 2025
SMN1
Homo sapiensHGNC:11117
SummaryOrthologyParalogyFunction - GO AnnotationsPathwaysPhenotypesDisease AssociationsAlleles and VariantsTransgenic AllelesModelsSequence Feature ViewerSequence DetailsExpressionMolecular InteractionsGenetic Interactions
Gene

SMN1

Species
Homo sapiens
Symbol
SMN1
Name
survival of motor neuron 1, telomeric
Synonyms
  • BCD541
  • component of gems 1
Biotype
protein coding gene
Automated Description
Enables identical protein binding activity. Involved in DNA-templated transcription termination; spliceosomal complex assembly; and spliceosomal snRNP assembly. Located in several cellular components, including cytoplasmic ribonucleoprotein granule; nuclear body; and perikaryon. Part of SMN complex. Implicated in Werdnig-Hoffmann disease; adult spinal muscular atrophy; intermediate spinal muscular atrophy; juvenile spinal muscular atrophy; and spinal muscular atrophy.
RGD Description
This gene is part of a 500 kb inverted duplication on chromosome 5q13. This duplicated region contains at least four genes and repetitive elements which make it prone to rearrangements and deletions. The repetitiveness and complexity of the sequence have also caused difficulty in determining the organization of this genomic region. The telomeric and centromeric copies of this gene are nearly identical and encode the same protein. However, mutations in this gene, the telomeric copy, are associated with spinal muscular atrophy; mutations in the centromeric copy do not lead to disease. The centromeric copy may be a modifier of disease caused by mutation in the telomeric copy. The critical sequence difference between the two genes is a single nucleotide in exon 7, which is thought to be an exon splice enhancer. Note that the nine exons of both the telomeric and centromeric copies are designated historically as exon 1, 2a, 2b, and 3-8. It is thought that gene conversion events may involve the two genes, leading to varying copy numbers of each gene. The protein encoded by this gene localizes to both the cytoplasm and the nucleus. Within the nucleus, the protein localizes to subnuclear bodies called gems which are found near coiled bodies containing high concentrations of small ribonucleoproteins (snRNPs). This protein forms heteromeric complexes with proteins such as SIP1 and GEMIN4, and also interacts with several proteins known to be involved in the biogenesis of snRNPs, such as hnRNP U protein and the small nucleolar RNA binding protein. Multiple transcript variants encoding distinct isoforms have been described. [provided by RefSeq, Jul 2014]
Cross References
Additional Information
Literature

Orthology

Gene tree
PANTHER:PTHR39267
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Paralogy

Function - GO Annotations

Pathways

No data available

Phenotypes

Primary Sources
None
Other Sources
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Annotation details
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    Disease Associations

    Cases where the expected disease association was NOT found
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    Alleles and Variants

    Allele/Variant Symbol
    Allele Synonyms
    Category
    Variant
    Variant type
    Molecular consequence
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      Transgenic Alleles

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

        Model name
        Experimental condition
        Associated Human Diseases
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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

          SMN1 molecule type
          Interactor gene
          Interactor species
          Interactor molecule type
          Detection methods
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            Genetic Interactions

            SMN1 role
            SMN1 genetic perturbation
            Interactor gene
            Interactor species
            Interactor role
            Interactor genetic perturbation
            Interaction type
            Phenotype or trait
            Source
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