17-70174715-A-G

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_000891.3(KCNJ2):c.-216-109A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0313 in 370,352 control chromosomes in the GnomAD database, including 1,200 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.063 (1020 hom., cov: 32)
  • Exomes 𝑓: 0.0092 (180 hom.)
• Consequence: KCNJ2 NM_000891.3 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.07

Genes affected

KCNJ2 (HGNC:6263): (potassium inwardly rectifying channel subfamily J member 2) Potassium channels are present in most mammalian cells, where they participate in a wide range of physiologic responses. The protein encoded by this gene is an integral membrane protein and inward-rectifier type potassium channel. The encoded protein, which has a greater tendency to allow potassium to flow into a cell rather than out of a cell, probably participates in establishing action potential waveform and excitability of neuronal and muscle tissues. Mutations in this gene have been associated with Andersen syndrome, which is characterized by periodic paralysis, cardiac arrhythmias, and dysmorphic features. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BP6: Variant 17-70174715-A-G is Benign according to our data. Variant chr17-70174715-A-G is described in ClinVar as [Benign]. Clinvar id is 1268619.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.215 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KCNJ2	NM_000891.3	c.-216-109A>G		intron_variant		ENST00000243457.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KCNJ2	ENST00000243457.4	c.-216-109A>G		intron_variant		1	NM_000891.3	P1
KCNJ2	ENST00000535240.1	c.-216-109A>G		intron_variant		1		P1

Frequencies

GnomAD3 genomes AF: 0.0627 AC: 9545 AN: 152210 Hom.: 1010 Cov.: 32

Gnomad AFR AF: 0.218

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0226

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00145

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0158

Gnomad NFE AF: 0.000852

Gnomad OTH AF: 0.0458

GnomAD4 exome AF: 0.00924 AC: 2015 AN: 218024 Hom.: 180 AF XY: 0.00748 AC XY: 866 AN XY: 115758

Gnomad4 AFR exome AF: 0.223

Gnomad4 AMR exome AF: 0.0140

Gnomad4 ASJ exome AF: 0.000320

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000471

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000439

Gnomad4 OTH exome AF: 0.0147

GnomAD4 genome AF: 0.0629 AC: 9584 AN: 152328 Hom.: 1020 Cov.: 32 AF XY: 0.0611 AC XY: 4553 AN XY: 74488

Gnomad4 AFR AF: 0.218

Gnomad4 AMR AF: 0.0225

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00103

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000852

Gnomad4 OTH AF: 0.0454

Alfa AF: 0.0492 Hom.: 95

Bravo AF: 0.0726

Asia WGS AF: 0.0130 AC: 45 AN: 3476

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jun 30, 2018

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
Cadd	Benign	0.016
Dann	Benign	0.60

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

Other links and lift over

dbSNP: rs10083866; hg19: chr17-68170856;