Variant 1-215235120-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001017425.3(KCNK2):c.1256T>C(p.Ile419Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000159 in 1,446,212 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

KCNK2
NM_001017425.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.89

Variant links:

Genes affected

KCNK2 (HGNC:6277): (potassium two pore domain channel subfamily K member 2) This gene encodes one of the members of the two-pore-domain background potassium channel protein family. This type of potassium channel is formed by two homodimers that create a channel that leaks potassium out of the cell to control resting membrane potential. The channel can be opened, however, by certain anesthetics, membrane stretching, intracellular acidosis, and heat. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

KCNK2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.16424772).

BS2

High AC in GnomAdExome4 at 23 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNK2	NM_001017425.3 linkuse as main transcript	c.1256T>C	p.Ile419Thr	missense_variant	7/7	ENST00000444842.7	NP_001017425.2	O95069-1Q6ZW95

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNK2	ENST00000444842.7 linkuse as main transcript	c.1256T>C	p.Ile419Thr	missense_variant	7/7	1	NM_001017425.3	ENSP00000394033.2		O95069-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000401

AC:

AN:

249324

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135052

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:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000159

AC:

AN:

1446212

Hom.:

Cov.:

AF XY:

0.0000112

AC XY:

AN XY:

715604

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000510

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000182

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

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

Aug 07, 2024

The c.1256T>C (p.I419T) alteration is located in exon 7 (coding exon 7) of the KCNK2 gene. This alteration results from a T to C substitution at nucleotide position 1256, causing the isoleucine (I) at amino acid position 419 to be replaced by a threonine (T). 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

0.22

BayesDel_addAF

Uncertain

0.049

BayesDel_noAF

Benign

-0.17

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.18

.;.;T

Eigen

Benign

0.15

Eigen_PC

Uncertain

0.31

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.94

D;D;D

M_CAP

Benign

0.018

MetaRNN

Benign

0.16

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.6

.;.;L

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-0.69

N;N;N

REVEL

Benign

0.23

Sift

Pathogenic

0.0

D;D;D

Sift4G

Uncertain

0.0050

D;.;D

Polyphen

0.56

P;P;B

Vest4

0.36

MutPred

0.42

.;.;Loss of sheet (P = 0.0315);

MVP

0.51

MPC

1.0

ClinPred

0.80

GERP RS

5.6

Varity_R

0.29

gMVP

0.78

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