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Mendeliome v0.2035 KCNT2 Zornitza Stark Phenotypes for gene: KCNT2 were changed from Epileptic encephalopathy, early infantile, 57, MIM#617771; Developmental and epileptic encephalopathy to Epileptic encephalopathy, early infantile, 57, MIM#617771; Developmental and epileptic encephalopathy; Epilepsy of infancy with migrating focal seizures (EIMFS)
Mendeliome v0.2034 KCNT2 Zornitza Stark Publications for gene: KCNT2 were set to 29069600; 29740868
Mendeliome v0.2033 KCNT2 Kristin Rigbye reviewed gene: KCNT2: Rating: GREEN; Mode of pathogenicity: Other; Publications: 29069600, 29740868, 32038177; Phenotypes: Epileptic encephalopathy, early infantile, 57, 617771, Epilepsy of infancy with migrating focal seizures (EIMFS); Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.371 KCNT2 Zornitza Stark Marked gene: KCNT2 as ready
Mendeliome v0.371 KCNT2 Zornitza Stark Gene: kcnt2 has been classified as Green List (High Evidence).
Mendeliome v0.371 KCNT2 Zornitza Stark Classified gene: KCNT2 as Green List (high evidence)
Mendeliome v0.371 KCNT2 Zornitza Stark Gene: kcnt2 has been classified as Green List (High Evidence).
Mendeliome v0.370 KCNT2 Zornitza Stark gene: KCNT2 was added
gene: KCNT2 was added to Mendeliome_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 29069600; 29740868
Phenotypes for gene: KCNT2 were set to Epileptic encephalopathy, early infantile, 57, MIM#617771; Developmental and epileptic encephalopathy
Review for gene: KCNT2 was set to GREEN
Added comment: Reviewed by E Palmer: 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