Variant 8-139618469-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2PP2BP4_Strong

The NM_001282534.2(KCNK9):c.914A>G(p.Gln305Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,714 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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: 0.0000014 ( 0 hom. )

Consequence

KCNK9
NM_001282534.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.12

Variant links:

Genes affected

KCNK9 (HGNC:6283): (potassium two pore domain channel subfamily K member 9) This gene encodes a protein that contains multiple transmembrane regions and two pore-forming P domains and functions as a pH-dependent potassium channel. Amplification and overexpression of this gene have been observed in several types of human carcinomas. This gene is imprinted in the brain, with preferential expression from the maternal allele. A mutation in this gene was associated with Birk-Barel dysmorphism syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2017]

KCNK9 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), KCNK9. . Gene score misZ 2.9038 (greater than the threshold 3.09). Trascript score misZ 3.4593 (greater than threshold 3.09). GenCC has associacion of gene with Birk-Barel syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.03603509).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNK9	NM_001282534.2 linkuse as main transcript	c.914A>G	p.Gln305Arg	missense_variant	2/2	ENST00000520439.3	NP_001269463.1
KCNK9	NR_104210.2 linkuse as main transcript	n.1045A>G		non_coding_transcript_exon_variant	2/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNK9	ENST00000520439.3 linkuse as main transcript	c.914A>G	p.Gln305Arg	missense_variant	2/2	1	NM_001282534.2	ENSP00000430676	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461714

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727168

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

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:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 26, 2022

The c.914A>G (p.Q305R) alteration is located in exon 2 (coding exon 2) of the KCNK9 gene. This alteration results from a A to G substitution at nucleotide position 914, causing the glutamine (Q) at amino acid position 305 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

0.069

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.87

CADD

Benign

1.3

DANN

Benign

0.26

DEOGEN2

Benign

0.12

T;T;T;T;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.57

.;T;.;.;T

M_CAP

Benign

0.0010

MetaRNN

Benign

0.036

T;T;T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.46

N;N;N;N;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.39

PROVEAN

Benign

0.22

.;N;N;.;.

REVEL

Benign

0.020

Sift

Benign

1.0

.;T;T;.;.

Sift4G

Benign

1.0

.;T;T;.;.

Polyphen

0.0

B;B;B;B;.

Vest4

0.086, 0.060

MutPred

0.24

Gain of helix (P = 0.0199);Gain of helix (P = 0.0199);Gain of helix (P = 0.0199);Gain of helix (P = 0.0199);.;

MVP

0.29

MPC

1.2

ClinPred

0.060

GERP RS

-2.6

Varity_R

0.037

gMVP

0.39

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over