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DDG2P

Gene: KCNMA1

Green List (high evidence)
KCNMA1 (potassium calcium-activated channel subfamily M alpha 1)
EnsemblGeneIds (GRCh38): ENSG00000156113
EnsemblGeneIds (GRCh37): ENSG00000156113
OMIM: 600150, Gene2Phenotype
KCNMA1 is in 7 panels

2 reviews

Achchuthan Shanmugasundram (Genomics England Curator)

Green List (high evidence)

The DDG2P confidence category, allelic requirement and molecular mechanism for KCNMA1-related generalized epilepsy and paroxysmal dyskinesia are definitive, monoallelic_autosomal and gain of function (PMIDs: 15937479, 26195193, 28728269, 29330545, 31152168, 31427379, 32132200, 32633875, 33043086, 33178487, 34224328, 34499417, 34563042, 34674900, 35095492, 35141357, 35156297, 35730691, 36127141, 36252966). The cross-cutting modifier is restricted mutation set. More details can be found in https://www.ebi.ac.uk/gene2phenotype/lgd/G2P00511. The DDG2P confidence category, allelic requirement and molecular mechanism for KCNMA1-related developmental delay, seizures and cerebellar atrophy are strong, biallelic_autosomal and loss of function (PMIDs: 27567911, 29545233, 31152168). More details can be found in https://www.ebi.ac.uk/gene2phenotype/lgd/G2P03175.
Created: 13 Feb 2026, 9:25 p.m. | Last Modified: 13 Feb 2026, 9:25 p.m.
Panel Version: 6.17
The DDG2P confidence category for the disease GENERALIZED EPILEPSY AND PAROXYSMAL DYSKINESIA, OMIM:609446 is definitive. The allelic requirement and mutation consequence are monoallelic_autosomal and altered gene product structure (PMIDs: 29330545;31152168;32132200;15937479;33178487;34224328). The DDG2P confidence category for the disease KCNMA1-related developmental delay, seizures and cerebellar atrophy is strong. The allelic requirement and mutation consequence are biallelic_autosomal and absent gene product (PMIDs: 29545233;27567911;31152168).
Created: 4 Oct 2023, 5:08 p.m. | Last Modified: 4 Oct 2023, 5:08 p.m.
Panel Version: 3.12

Mode of inheritance
BOTH monoallelic and biallelic, autosomal or pseudoautosomal

Phenotypes
KCNMA1-related developmental delay, seizures and cerebellar atrophy; OMIM:609446.0; MONDO:0060551; OMIM:617643.0; GENERALIZED EPILEPSY AND PAROXYSMAL DYSKINESIA, OMIM:609446; MONDO:0012276; KCNMA1-related generalized epilepsy and paroxysmal dyskinesia

Publications

Created: 4 Oct 2023, 5:08 p.m.
Last Modified: 4 Oct 2023, 5:08 p.m.
Panel version: 6.17

Rebecca Foulger (Genomics England curator)

I don't know

Original DDG2P rating: possible. DDG2P mode of pathogenicity: activating
Created: 19 Nov 2018, 11:30 a.m.
Created: 19 Nov 2018, 11:30 a.m.

Panel version: 0.2

Details

Mode of Inheritance
BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Sources
  • Expert Review Green
  • DD-Gene2Phenotype
Phenotypes
  • GENERALIZED EPILEPSY AND PAROXYSMAL DYSKINESIA 609446
OMIM
600150
Clinvar variants
Variants in KCNMA1
Penetrance
None
Publications
Panels with this gene

History Filter Activity

16 Feb 2026, Gel status: 3

Set mode of pathogenicity

Achchuthan Shanmugasundram (Genomics England Curator)

Mode of pathogenicity for gene: KCNMA1 was changed from Other - please provide details in the comments to None

4 Oct 2023, Gel status: 3

Added New Source, Set mode of inheritance, Set publications, Status Update

Achchuthan Shanmugasundram (Genomics England Curator)

Source Expert Review Green was added to KCNMA1. Mode of inheritance for gene KCNMA1 was changed from MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: KCNMA1 were updated from 15937479 to 34224328; 31152168; 15937479; 27567911; 33178487; 29545233; 32132200; 29330545 Rating Changed from Red List (low evidence) to Green List (high evidence)

29 Jan 2019, Gel status: 1

Panel promoted to version 1.0

Rebecca Foulger (Genomics England curator)

Rebecca Foulger: Original DDG2P rating: possibl

19 Nov 2018, Gel status: 1

Created, Added New Source, Set mode of inheritance, Set publications, Set Phenotypes, Set mode of pathogenicity

Rebecca Foulger (Genomics England curator)

gene: KCNMA1 was added gene: KCNMA1 was added to DDG2P. Sources: Expert Review Red,DD-Gene2Phenotype Mode of inheritance for gene: KCNMA1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: KCNMA1 were set to 15937479 Phenotypes for gene: KCNMA1 were set to GENERALIZED EPILEPSY AND PAROXYSMAL DYSKINESIA 609446 Mode of pathogenicity for gene: KCNMA1 was set to Other - please provide details in the comments