6-39299483-T-C

Variant names:

• chr6-39299483-T-C
• rs190089590
• NM_031460.4:c.943A>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_031460.4(KCNK17):​c.943A>G​(p.Ile315Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000434 in 1,614,220 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: KCNK17 NM_031460.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.63
• Publications: 0 publications found

Genes affected

KCNK17 (HGNC:14465): (potassium two pore domain channel subfamily K member 17) The protein encoded by this gene belongs to the family of potassium channel proteins containing two pore-forming P domains. This channel is an open rectifier which primarily passes outward current under physiological K+ concentrations. This gene is activated at alkaline pH. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2008]

KCNK17 Gene-Disease associations (from GenCC):

• heart conduction disease

  Inheritance: Unknown Classification: LIMITED Submitted by: Genomics England PanelApp

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.028943062).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNK17	NM_031460.4	c.943A>G	p.Ile315Val	missense_variant	Exon 5 of 5	ENST00000373231.9	NP_113648.2
KCNK17	NM_001135111.2	c.*278A>G		3_prime_UTR_variant	Exon 6 of 6		NP_001128583.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNK17	ENST00000373231.9	c.943A>G	p.Ile315Val	missense_variant	Exon 5 of 5	1	NM_031460.4	ENSP00000362328.4
KCNK17	ENST00000453413.2	c.*278A>G		3_prime_UTR_variant	Exon 6 of 6	5		ENSP00000401271.2

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152224 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000385

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

GnomAD2 exomes AF: 0.0000199 AC: 5 AN: 251222 AF XY: 0.0000295

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000272

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461878 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727242

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.000101 AC: 4 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112010

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152342 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74496

African (AFR) AF: 0.00 AC: 0 AN: 41586

American (AMR) AF: 0.00 AC: 0 AN: 15314

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.000386 AC: 2 AN: 5184

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68026

Other (OTH) AF: 0.00 AC: 0 AN: 2114

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 29, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.943A>G (p.I315V) alteration is located in exon 5 (coding exon 5) of the KCNK17 gene. This alteration results from a A to G substitution at nucleotide position 943, causing the isoleucine (I) at amino acid position 315 to be replaced by a valine (V). 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	0.079
BayesDel_addAF	Benign	-0.60	T
BayesDel_noAF	Benign	-0.81
CADD	Benign	0.042
DANN	Benign	0.63
DEOGEN2	Benign	0.0073	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.0080	N
LIST_S2	Benign	0.45	T
M_CAP	Benign	0.0062	T
MetaRNN	Benign	0.029	T
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	0.90	L
PhyloP100		-1.6
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.080	N
REVEL	Benign	0.0090
Sift	Benign	0.092	T
Sift4G	Benign	0.23	T
Polyphen		0.0010	B
Vest4		0.069
MVP		0.20
MPC		0.18
ClinPred		0.019	T
GERP RS		-2.2
Varity_R		0.057
gMVP		0.12
Mutation Taster		=99/1	polymorphism

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

Other links and lift over

dbSNP: rs190089590; hg19: chr6-39267259;