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ATXN1

Synonyms
ATX1, D6S504E, SCA1
External resources
Summary
The protein encoded by this gene is an ortholog of the Drosophila melanogaster capicua gene, and is a member of the high mobility group (HMG)-box superfamily of transcriptional repressors. This protein contains a conserved HMG domain that is involved in DNA binding and nuclear localization, and a conserved C-terminus. Studies suggest that the N-terminal region of this protein interacts with Atxn1 (GeneID:6310), to form a transcription repressor complex, and in vitro studies suggest that polyglutamine-expansion of ATXN1 may alter the repressor activity of this complex. Mutations in this gene have been associated with olidogdendrogliomas (PMID:21817013). In addition, translocation events resulting in gene fusions of this gene with both DUX4 (GeneID:100288687) and FOXO4 (GeneID:4303) have been associated with round cell sarcomas. There are multiple pseudogenes of this gene found on chromosomes 1, 4, 6, 7, 16, 20, and the Y chromosome. Alternative splicing results in multiple transcript variants encoding different isoforms.

Variant counts

The variants found in rare patients tested by 3billion are classified and counted according to ACMG guidelines. The variants with over 5% variant frequency in population genome databases ( gnomAD, dbSNP, etc) are excluded.

Pathogenic
4
Likely pathogenic
0
VUS
17,287
Likely benign
2,104
Benign
17,660

Patient phenotypes

Proportions of phenotypes among 4 patients carrying pathogenic or likely pathogenic variants on ATXN1 gene are displayed below.

Phenotype class
Patients in 3billion (%)
Abnormality of head or neck
50%
Abnormality of prenatal development or birth
50%
Abnormality of the eye
50%
Abnormality of the genitourinary system
50%
Abnormality of the musculoskeletal system
50%
Abnormality of limbs
25%
Abnormality of the digestive system
25%
Abnormality of the integument
25%
Abnormality of the nervous system
25%
Growth abnormality
25%
Abnormal cellular phenotype
0%
Abnormality of blood and blood-forming tissues
0%
Abnormality of metabolism homeostasis
0%
Abnormality of the breast
0%
Abnormality of the cardiovascular system
0%
Abnormality of the ear
0%
Abnormality of the endocrine system
0%
Abnormality of the immune system
0%
Abnormality of the respiratory system
0%
Abnormality of the thoracic cavity
0%
Abnormality of the voice
0%
Constitutional symptom
0%
Neoplasm
0%

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