22-38427093-C-T

Variant names:

• chr22-38427093-C-T
• rs778147631
• NM_152868.3:c.1040G>A

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4 BS2

The NM_152868.3(KCNJ4):​c.1040G>A​(p.Cys347Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000868 in 1,612,918 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: KCNJ4 NM_152868.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.52
• Publications: 0 publications found

Genes affected

KCNJ4 (HGNC:6265): (potassium inwardly rectifying channel subfamily J member 4) Several different potassium channels are known to be involved with electrical signaling in the nervous system. One class is activated by depolarization whereas a second class is not. The latter are referred to as inwardly rectifying K+ channels, and they have a greater tendency to allow potassium to flow into the cell rather than out of it. This asymmetry in potassium ion conductance plays a key role in the excitability of muscle cells and neurons. The protein encoded by this gene is an integral membrane protein and member of the inward rectifier potassium channel family. The encoded protein has a small unitary conductance compared to other members of this protein family. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

ENSG00000228620 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.27682927).
• BS2: High AC in GnomAdExome4 at 13 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_152868.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNJ4	NM_152868.3	MANE Select	c.1040G>A	p.Cys347Tyr	missense	Exon 2 of 2	NP_690607.1	P48050
	KCNJ4	NM_004981.2		c.1040G>A	p.Cys347Tyr	missense	Exon 2 of 2	NP_004972.1	P48050

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNJ4	ENST00000303592.3	TSL:1 MANE Select	c.1040G>A	p.Cys347Tyr	missense	Exon 2 of 2	ENSP00000306497.3	P48050
	KCNJ4	ENST00000940563.1		c.1040G>A	p.Cys347Tyr	missense	Exon 2 of 2	ENSP00000610622.1
	KCNJ4	ENST00000947103.1		c.1040G>A	p.Cys347Tyr	missense	Exon 2 of 2	ENSP00000617162.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152186 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

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: 0.0000323 AC: 8 AN: 247662 AF XY: 0.0000148

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000436

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000890 AC: 13 AN: 1460614 Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5 AN XY: 726612

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

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.000302 AC: 12 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52236

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111956

Other (OTH) AF: 0.0000166 AC: 1 AN: 60368

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152304 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74466

African (AFR) AF: 0.00 AC: 0 AN: 41562

American (AMR) AF: 0.00 AC: 0 AN: 15300

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

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5176

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

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: 2116

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.093
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.090
CADD	Benign	22
DANN	Benign	0.94
DEOGEN2	Uncertain	0.47	T
Eigen	Benign	-0.10
Eigen_PC	Benign	0.049
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.051	D
MetaRNN	Benign	0.28	T
MetaSVM	Uncertain	0.23	D
MutationAssessor	Benign	1.2	L
PhyloP100		1.5
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-0.52	N
REVEL	Uncertain	0.30
Sift	Benign	1.0	T
Sift4G	Benign	1.0	T
Polyphen		0.24	B
Vest4		0.49
MutPred		0.30		Loss of catalytic residue at P346 (P = 0.0067)
MVP		0.82
MPC		2.0
ClinPred		0.076	T
GERP RS		4.6
Varity_R		0.19
gMVP		0.64
Mutation Taster		=78/22	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: rs778147631; hg19: chr22-38823098;