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Genetic Epilepsy v0.55 KCNT2 Zornitza Stark Marked gene: KCNT2 as ready
Genetic Epilepsy v0.55 KCNT2 Zornitza Stark Gene: kcnt2 has been classified as Green List (High Evidence).
Genetic Epilepsy v0.55 KCNT2 Zornitza Stark Phenotypes for gene: KCNT2 were changed from Developmental and epileptic encephalopathy to Epileptic encephalopathy, early infantile, 57, MIM#617771; Developmental and epileptic encephalopathy
Genetic Epilepsy v0.54 KCNT2 Zornitza Stark Publications for gene: KCNT2 were set to (PMID: 29069600; 29740868)
Genetic Epilepsy v0.53 KCNT2 Zornitza Stark Classified gene: KCNT2 as Green List (high evidence)
Genetic Epilepsy v0.53 KCNT2 Zornitza Stark Gene: kcnt2 has been classified as Green List (High Evidence).
Genetic Epilepsy v0.46 KCNT2 Elizabeth Palmer gene: KCNT2 was added
gene: KCNT2 was added to Genetic Epilepsy_AustralianGenomics_VCGS. Sources: Literature
Mode of inheritance for gene: KCNT2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KCNT2 were set to (PMID: 29069600; 29740868)
Phenotypes for gene: KCNT2 were set to Developmental and epileptic encephalopathy
Penetrance for gene: KCNT2 were set to Complete
Mode of pathogenicity for gene: KCNT2 was set to Other
Review for gene: KCNT2 was set to GREEN
Added comment: A.


Ambrosino et al described 2 unrelated females with de novo variants in KCNT2. The first patient had the variant p.(Arg190His) had with West syndrome followed by Lennox-Gastaut syndrome , the second patient had the variant p.(Arg190Pro) and DEE with migrating focal seizures. Both variants were absent gnomad and had supportive in silico support for pathogenicity. In an electrophisological model both KCNT2 R190P and KCNT2 R190H increased maximal current density and shifted toward more negative membrane potential values the activation curve of KCNT2 channels, consistent with gain of function effects. PMID: 29740868.

Gururaj et al describe one male with de novo variant in KCNT2 p. (Phe240Leu) and early infantile epileptic encephalopathy. he variant was absent gnomad and supportive evidence of pathogenicity This variant was electrophysiologically modelled and revealed that the variant resulted in a 'change in function' demonstrating unusual altered selectivity in KNa channels.PMID: 29069600.
Sources: Literature