intellectual disability, autosomal dominant 5
Findings
No curated finding names intellectual disability, autosomal dominant 5 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Any autosomal dominant non-syndromic intellectual disability in which the cause of the disease is a mutation in the SYNGAP1 gene.
Definition from the Mondo Disease Ontology (MONDO:0012960), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal dominant inheritance
- Onset and course
- Infantile onset
HPO, annotations 2026-09-02
Features
51 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Global developmental delayHPOHP:0001263
- 3 of 3 reported patients
- Very frequent (80% to 99% of cases)
- HypotoniaHPOHP:0001252
- 3 of 3 reported patients
- Frequent (30% to 79% of cases)
- Moderate intellectual disabilityHPOHP:0002342
- 6 of 6 reported patients
- Frequent (30% to 79% of cases)
- Motor delayHPOHP:0001270
- 3 of 3 reported patients
- Abnormality of pain sensationHPOHP:0010832
- Very frequent (80% to 99% of cases)
- Delayed speech and language developmentHPOHP:0000750
- Very frequent (80% to 99% of cases)
Show the remaining 39
- Atypical behaviorHPOHP:0000708
- Frequent (30% to 79% of cases)
- Autistic behaviorHPOHP:0000729
- 1 of 3 reported patients
- Frequent (30% to 79% of cases)
- Developmental regressionHPOHP:0002376
- Frequent (30% to 79% of cases)
- Eating-induced seizureHPOHP:0020208
- Frequent (30% to 79% of cases)
- Gait disturbanceHPOHP:0001288
- Frequent (30% to 79% of cases)
- IncoordinationHPOHP:0002311
- Frequent (30% to 79% of cases)
Genes
1 gene
Germline variants in the gene encoding each protein, as classified by GenCC submitters, each in their own words. Limited, disputed and refuted submissions are listed too.
- SYNGAP1HGNC:11497
- Definitive · G2P · Autosomal dominant · 2015
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal dominant · 2023
- Strong · PanelApp Australia · Autosomal dominant · 2025
- Supportive · Orphanet · Autosomal dominant · 2021
Where it sits
Other names
8 names
Resolves to: intellectual disability, autosomal dominant 5
- Also called
- autosomal dominant intellectual disability 5autosomal dominant non-syndromic intellectual disability caused by mutation in SYNGAP1epilepsy due to SYNGAP mutationsintellectual disability, autosomal dominant type 5mental retardation, autosomal dominant type 5MRD5SYNGAP1 autosomal dominant non-syndromic intellectual disabilitySYNGAP1-related developmental and epileptic encephalopathy