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| Genetic Epilepsy v0.1021 | FGF13 | Zornitza Stark Phenotypes for gene: FGF13 were changed from Intellectual disability; epilepsy to Developmental and epileptic encephalopathy 90, MIM# 301058; Intellectual disability; epilepsy | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Genetic Epilepsy v0.1020 | FGF13 | Zornitza Stark edited their review of gene: FGF13: Changed phenotypes: Developmental and epileptic encephalopathy 90, MIM# 301058, Intellectual disability, epilepsy | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Genetic Epilepsy v0.999 | FGF13 | Zornitza Stark Marked gene: FGF13 as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Genetic Epilepsy v0.999 | FGF13 | Zornitza Stark Gene: fgf13 has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Genetic Epilepsy v0.999 | FGF13 | Zornitza Stark Classified gene: FGF13 as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Genetic Epilepsy v0.999 | FGF13 | Zornitza Stark Gene: fgf13 has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Genetic Epilepsy v0.998 | FGF13 |
Zornitza Stark gene: FGF13 was added gene: FGF13 was added to Genetic Epilepsy. Sources: Literature Mode of inheritance for gene: FGF13 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: FGF13 were set to 33245860 Phenotypes for gene: FGF13 were set to Intellectual disability; epilepsy Review for gene: FGF13 was set to GREEN Added comment: Two sibling pairs and three unrelated males reported who presented in infancy with intractable focal seizures and severe developmental delay. The variants were located in the N-terminal domain of the A isoform of FGF13/FHF2 (FHF2A). The X-linked FHF2 gene (also known as FGF13) has alternative first exons which produce multiple protein isoforms that differ in their N-terminal sequence. The variants were located at highly conserved residues in the FHF2A inactivation particle that competes with the intrinsic fast inactivation mechanism of Nav channels. Functional characterization of mutant FHF2A co-expressed with wild-type Nav1.6 (SCN8A) revealed that mutant FHF2A proteins lost the ability to induce rapid-onset, long-term blockade of the channel while retaining pro-excitatory properties. These gain-of-function effects are likely to increase neuronal excitability consistent with the epileptic potential of FHF2 variants. Sources: Literature |
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