rs750804948

Positions:

• chr10-77637612-TGCCGCCGCCGCC-T
• chr10-77637612-TGCCGCCGCCGCC-TGCC
• chr10-77637612-TGCCGCCGCCGCC-TGCCGCC
• chr10-77637612-TGCCGCCGCCGCC-TGCCGCCGCC
• chr10-77637612-TGCCGCCGCCGCC-TGCCGCCGCCGCCGCC
• chr10-77637612-TGCCGCCGCCGCC-TGCCGCCGCCGCCGCCGCC
• chr10-77637612-TGCCGCCGCCGCC-TGCCGCCGCCGCCGCCGCCGCC
• chr10-77637612-TGCCGCCGCCGCC-TGCCGCCGCCGCCGCCGCCGCCGCC

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 0P and 0B.

The NM_001161352.2(KCNMA1):​c.19_30delGGCGGCGGCGGC​(p.Gly7_Gly10del) variant causes a conservative inframe deletion change. The variant allele was found at a frequency of 0.00000526 in 1,521,096 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000036 (0 hom.)
• Consequence: KCNMA1 NM_001161352.2 conservative_inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.76

Genes affected

KCNMA1 (HGNC:6284): (potassium calcium-activated channel subfamily M alpha 1) This gene encodes the alpha subunit of calcium-activated BK channel. The encoded protein is involved in several physiological processes including smooth muscle contraction, neurotransmitter release and neuronal excitability. Mutations in this gene are associated with a spectrum of neurological disorders including Paroxysmal Nonkinesigenic Dyskinesia 3, Idiopathic Generalized Epilepsy 16 and Liang-Wang syndrome. [provided by RefSeq, Aug 2022]

KCNMA1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNMA1	NM_001161352.2	c.19_30delGGCGGCGGCGGC	p.Gly7_Gly10del	conservative_inframe_deletion	1/28	ENST00000286628.14	NP_001154824.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNMA1	ENST00000286628.14	c.19_30delGGCGGCGGCGGC	p.Gly7_Gly10del	conservative_inframe_deletion	1/28	1	NM_001161352.2	ENSP00000286628.8

Frequencies

GnomAD3 genomes AF: 0.0000268 AC: 4 AN: 149320 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000808

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000253 AC: 3 AN: 118702 Hom.: 0 AF XY: 0.0000461 AC XY: 3 AN XY: 65076

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000315

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000365 AC: 5 AN: 1371678 Hom.: 0 AF XY: 0.00000444 AC XY: 3 AN XY: 676312

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000142

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000201 AC: 3 AN: 149418 Hom.: 0 Cov.: 32 AF XY: 0.0000411 AC XY: 3 AN XY: 73038

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000608

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Generalized epilepsy-paroxysmal dyskinesia syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 11, 2019

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant has not been reported in the literature in individuals with KCNMA1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This variant, c.19_30del, results in the deletion of 4 amino acid(s) of the KCNMA1 protein (p.Gly7_Gly10del), but otherwise preserves the integrity of the reading frame. -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs750804948; hg19: chr10-79397370;