Variant 19-17973952-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001386974.1(KCNN1):c.64G>A(p.Gly22Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000994 in 1,408,332 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000099 ( 0 hom. )

Consequence

KCNN1
NM_001386974.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.638

Variant links:

Genes affected

KCNN1 (HGNC:6290): (potassium calcium-activated channel subfamily N member 1) Action potentials in vertebrate neurons are followed by an afterhyperpolarization (AHP) that may persist for several seconds and may have profound consequences for the firing pattern of the neuron. Each component of the AHP is kinetically distinct and is mediated by different calcium-activated potassium channels. The protein encoded by this gene is activated before membrane hyperpolarization and is thought to regulate neuronal excitability by contributing to the slow component of synaptic AHP. The encoded protein is an integral membrane protein that forms a voltage-independent calcium-activated channel with three other calmodulin-binding subunits. This gene is a member of the KCNN family of potassium channel genes. [provided by RefSeq, Jul 2008]

KCNN1 links:

KCNN1 (HGNC:):

KCNN1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0971286).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNN1	NM_001386974.1 linkuse as main transcript	c.64G>A	p.Gly22Arg	missense_variant	2/10	ENST00000684775.1	NP_001373903.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNN1	ENST00000684775.1 linkuse as main transcript	c.64G>A	p.Gly22Arg	missense_variant	2/10		NM_001386974.1	ENSP00000507021.1		Q92952-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000127

AC:

AN:

157468

Hom.:

AF XY:

0.0000232

AC XY:

AN XY:

86316

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000322

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000994

AC:

AN:

1408332

Hom.:

Cov.:

AF XY:

0.0000101

AC XY:

AN XY:

696342

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000433

Gnomad4 NFE exome

AF:

0.0000110

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000883

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 11, 2022

The c.64G>A (p.G22R) alteration is located in exon 3 (coding exon 1) of the KCNN1 gene. This alteration results from a G to A substitution at nucleotide position 64, causing the glycine (G) at amino acid position 22 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.092

BayesDel_noAF

Benign

-0.27

CADD

Benign

6.1

DANN

Benign

0.83

DEOGEN2

Benign

0.17

T;.;.

Eigen

Benign

-0.90

Eigen_PC

Benign

-0.97

FATHMM_MKL

Benign

0.035

LIST_S2

Benign

0.75

T;T;T

M_CAP

Benign

0.0066

MetaRNN

Benign

0.097

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.5

L;.;.

PrimateAI

Uncertain

0.56

REVEL

Benign

0.050

Sift4G

Benign

1.0

T;T;T

Polyphen

0.62

P;.;.

Vest4

0.14

MutPred

0.28

Gain of methylation at G22 (P = 0.0383);.;Gain of methylation at G22 (P = 0.0383);

MVP

0.22

MPC

0.61

ClinPred

0.12

GERP RS

2.2

Varity_R

0.035

gMVP

0.27

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over