FXS FMR1

Disease ID
FXS, FXTAS, POF1
Gene ID
FMR1
Updated
Sep 24, 2025
v2.11.0
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Disease

Name
Fragile X syndrome (FXS), fragile X-associated tremor/ataxia syndrome (FXTAS), and fragile X-associated primary ovarian insufficiency FXPOI/POF1
Inheritance
X-linked dominant
Description
Prevalence
14 100,000
Age of Onset(Typical)Years0  781  65
Age of Onset Details
Typical: FXS 1 to 'first several years of life', FXTAS 60-654 ; Range: 09 - 7810 ; detailed description of typical symptom onset and diagnosis available from Arnold et al7 .

Locus

Details
Mechanism
LoF/GoF
Year
199215 ; causative gene discovered in 199116
Location in Gene
5' UTR
Gene Strand

Alleles

Ref. Motif
CGG
Pathogenic (ref.)
CGG
Pathogenic (gene)
CGG
BenignIntermediatePathogenicUnits5  4445  200201  2,000

gnomAD

Pathogenic Genotype (%)Admixed AmericanAfrican/African AmericanAmishAshkenazi JewishEuropean (non Finnish)FinnishMiddle EasternSouth AsianEast AsianOthers01234567FMR1 (both)

Pathogenic Genotype (%): % of individuals predicted to be affected based on their genotype

References

Direct supporting references for info on this page.

1
Ontology Lookup Service (OLS)
mondo:0010383
2
Ontology Lookup Service (OLS)
mondo:0010706
3
Ontology Lookup Service (OLS)
mondo:0010382
5
American journal of medical genetics. Part A · 2014-04-03
pmid:24700618
6
American journal of human genetics · 2017-11-02
pmid:29100084
8
Journal of assisted reproduction and genetics · 2024-09-25
pmid:39320553
10
American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2007-06-05
pmid:17427188
11
Movement disorders : official journal of the Movement Disorder Society · 2020-05-28
pmid:32463542
12
Frontiers in genetics · 2018-05-16
pmid:29868108
13
Nature reviews. Genetics · 2005-10-01
pmid:16205714
14
Japanese journal of radiology · 2022-09-28
pmid:36169768
15
American journal of medical genetics
pmid:1605194
16
Cell · 1991-05-31
pmid:1710175

Additional Literature

Additional literature related to this locus.

Raw PubMed search results
(All PubMed results returned by searching for this gene, tandem repeats, and disease, in medline format)

Analytical biochemistry · 2025-07-11
pmid:40653294
Frontiers in endocrinology · 2025-06-17
pmid:40600017
ACS pharmacology & translational science · 2025-02-25
pmid:40534679
Brain communications · 2025-05-17
pmid:40488180
The Journal of biological chemistry · 2025-06-04
pmid:40480633
Annals of neurology · 2025-06-03
pmid:40459253
Brain : a journal of neurology · 2025-06-02
pmid:40455869
American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2025-05-26
pmid:40418066
Genetics in medicine : official journal of the American College of Medical Genetics · 2025-05-22
pmid:40417743
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Details
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