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Mendeliome v1.956 RPH3A Lucy Spencer gene: RPH3A was added
gene: RPH3A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RPH3A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RPH3A were set to 37403762; 29441694
Phenotypes for gene: RPH3A were set to Neurodevelopmental disorder (MONDO#0700092), RPH3A-related
Review for gene: RPH3A was set to GREEN
Added comment: PMID: 37403762- 6 patients with RPH3A variant. All 6 have ID, 4 have epilepsy, 2 with obesity, 1 with dysmorphic features. All 6 have missense variants, 3 shown to be de novo, the other 3 parents were not available for testing. I patient also had language and motor impairment, breathing issues and mixed hypo/hypertonia- he also had variants in CUL4B, PRKAG2, SCN4A, none of these genes cause seizures (which he had).

Patch clamp studies on 2 of the missense showed they increased either the number of NMDA receptors on neuron membrane surface or increased their conductance. Study suggests that the variants interrupt the normal role of RPH3A activity at the synaptic NMDAR complex which is needed for the induction of synaptic plasticity and NMDAR-dependant behaviours

Previously this gene was reported in PMID: 29441694- 1 girl with learning disabilities, tremors, ataxia, hyperglycemia and muscle fatigability. Chet for 2 RPH3A missense. Functional analysis showed strong and marginal impairment of protein binding for each variant. this is the only biallelic report currently.
Sources: Literature
Mendeliome v1.891 SCN4A Zornitza Stark Phenotypes for gene: SCN4A were changed from Hyperkalemic periodic paralysis, type 2, MIM# 170500; Hypokalemic periodic paralysis, type 2, MIM# 613345; Myasthenic syndrome, congenital, 16, MIM# 614198; Myotonia congenita, atypical, acetazolamide-responsive , MIM#608390; Paramyotonia congenita , MIM#168300 to Congenital myopathy 22A, classic, MIM# 620351; Congenital myopathy 22B, severe fetal, MIM# 620369; Hyperkalemic periodic paralysis, type 2, MIM# 170500; Hypokalemic periodic paralysis, type 2, MIM# 613345; Myasthenic syndrome, congenital, 16, MIM# 614198; Myotonia congenita, atypical, acetazolamide-responsive , MIM#608390; Paramyotonia congenita , MIM#168300
Mendeliome v1.890 SCN4A Zornitza Stark edited their review of gene: SCN4A: Changed phenotypes: Congenital myopathy 22A, classic, MIM# 620351, Congenital myopathy 22B, severe fetal, MIM# 620369, Hyperkalemic periodic paralysis, type 2, MIM# 170500, Hypokalemic periodic paralysis, type 2, MIM# 613345, Myasthenic syndrome, congenital, 16, MIM# 614198, Myotonia congenita, atypical, acetazolamide-responsive , MIM#608390, Paramyotonia congenita , MIM#168300
Mendeliome v0.10414 SCN4A Zornitza Stark Marked gene: SCN4A as ready
Mendeliome v0.10414 SCN4A Zornitza Stark Gene: scn4a has been classified as Green List (High Evidence).
Mendeliome v0.10414 SCN4A Zornitza Stark Phenotypes for gene: SCN4A were changed from to Hyperkalemic periodic paralysis, type 2, MIM# 170500; Hypokalemic periodic paralysis, type 2, MIM# 613345; Myasthenic syndrome, congenital, 16, MIM# 614198; Myotonia congenita, atypical, acetazolamide-responsive , MIM#608390; Paramyotonia congenita , MIM#168300
Mendeliome v0.10413 SCN4A Zornitza Stark Publications for gene: SCN4A were set to
Mendeliome v0.10412 SCN4A Zornitza Stark Mode of inheritance for gene: SCN4A was changed from Unknown to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.10411 SCN4A Zornitza Stark reviewed gene: SCN4A: Rating: GREEN; Mode of pathogenicity: None; Publications: 34671263; Phenotypes: Hyperkalemic periodic paralysis, type 2, MIM# 170500, Hypokalemic periodic paralysis, type 2, MIM# 613345, Myasthenic syndrome, congenital, 16, MIM# 614198, Myotonia congenita, atypical, acetazolamide-responsive , MIM#608390, Paramyotonia congenita , MIM#168300; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.0 SCN4A Zornitza Stark gene: SCN4A was added
gene: SCN4A was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: SCN4A was set to Unknown