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| Intellectual disability - microarray and sequencing v3.461 | KCNK4 | Ivone Leong Tag watchlist tag was added to gene: KCNK4. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.461 | KCNK4 | Ivone Leong commented on gene: KCNK4: As the 2 unrelated patients who have the same de novo variants have severe ID/DD and 3rd patient has low average ID, this gene will be kept as Amber until further evidence is available. Watchlist tag has been added as well. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.461 | KCNK4 | Ivone Leong Phenotypes for gene: KCNK4 were changed from Neurodevelopmental delay; Intellectual disability; Seizures; Gingival overgrowth; Hypertrichosis to Facial dysmorphism, hypertrichosis, epilepsy, intellectual/developmental delay, and gingival overgrowth syndrome, 618381 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v3.0 | KCNK4 | Zornitza Stark reviewed gene: KCNK4: Rating: GREEN; Mode of pathogenicity: None; Publications: 30290154; Phenotypes: Facial dysmorphism, hypertrichosis, epilepsy, intellectual/developmental delay, and gingival overgrowth syndrome 618381; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.646 | KCNK4 | Ivone Leong Classified gene: KCNK4 as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.646 | KCNK4 | Ivone Leong Added comment: Comment on list classification: Given an amber rating as there is currently only one report detailing 3 unrelated patients (2 Italian and 1 of European ancestry) who have variants (2 patients have the same missense variant and the third patient has a different missense variant). The paper also describe some in vitro cell studies. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.646 | KCNK4 | Ivone Leong Gene: kcnk4 has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability - microarray and sequencing v2.510 | KCNK4 |
Konstantinos Varvagiannis gene: KCNK4 was added gene: KCNK4 was added to Intellectual disability. Sources: Literature,Expert Review Mode of inheritance for gene: KCNK4 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: KCNK4 were set to 30290154 Phenotypes for gene: KCNK4 were set to Neurodevelopmental delay; Intellectual disability; Seizures; Gingival overgrowth; Hypertrichosis Penetrance for gene: KCNK4 were set to unknown Mode of pathogenicity for gene: KCNK4 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: KCNK4 was set to AMBER Added comment: PMID: 30290154 reports on 3 unrelated individuals with de novo missense KCNK4 variants. All three individuals presented with developmental delay and epilepsy. Severe intellectual disability was a feature in two of these individuals while the third displayed low average intellectual functioning (IQ of 85). Other features common in all included facial dysmorphism (bushy eyebrows, long eyelashes, thin everted upper lip, micrognathia), generalized hypertrichosis and gingival overgrowth. The two missense variants reported [(p.Ala172Glu) and (p.Ala244Pro)] occurred as de novo events in all subjects, while the first SNV was observed in 2 (of the 3) patients with severe intellectual disability. Functional studies were suggestive of a gain-of-function effect. In line with this mechanism, Kcnk4 knockout mice did not seem to exhibit seizures, deficits in cognition or other neurodevelopmental phenotypes in a study conducted earlier and cited by the authors (PMID: 15175651). As a result this gene can be considered for inclusion in the panel as amber (or green). Sources: Literature, Expert Review |
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