11-128912110-G-C

Variant names:

• chr11-128912110-G-C
• rs149861510
• NM_000890.5:c.837G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000890.5(KCNJ5):​c.837G>C​(p.Glu279Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E279K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 34)
• Consequence: KCNJ5 NM_000890.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.71
• Publications: 1 publications found

Genes affected

KCNJ5 (HGNC:6266): (potassium inwardly rectifying channel subfamily J member 5) This gene encodes an integral membrane protein which belongs to one of seven subfamilies of inward-rectifier potassium channel proteins called potassium channel subfamily J. The encoded protein is a subunit of the potassium channel which is homotetrameric. It is controlled by G-proteins and has a greater tendency to allow potassium to flow into a cell rather than out of a cell. Naturally occurring mutations in this gene are associated with aldosterone-producing adenomas. [provided by RefSeq, Aug 2017]

KCNJ5 Gene-Disease associations (from GenCC):

• familial hyperaldosteronism type III

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• Andersen-Tawil syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• long QT syndrome 13

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• long QT syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.916

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNJ5	NM_000890.5	c.837G>C	p.Glu279Asp	missense_variant	Exon 2 of 3	ENST00000529694.6	NP_000881.3
KCNJ5	NM_001354169.2	c.837G>C	p.Glu279Asp	missense_variant	Exon 3 of 4		NP_001341098.1
KCNJ5	XM_011542810.4	c.837G>C	p.Glu279Asp	missense_variant	Exon 2 of 3		XP_011541112.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNJ5	ENST00000529694.6	c.837G>C	p.Glu279Asp	missense_variant	Exon 2 of 3	1	NM_000890.5	ENSP00000433295.1
KCNJ5	ENST00000338350.4	c.837G>C	p.Glu279Asp	missense_variant	Exon 3 of 4	1		ENSP00000339960.4
KCNJ5	ENST00000533599.1	c.837G>C	p.Glu279Asp	missense_variant	Exon 1 of 2	1		ENSP00000434266.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 47

GnomAD4 genome Cov.: 34

Alfa AF: 0.00 Hom.: 1

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cardiovascular phenotype Uncertain:1

Jan 26, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.E279D variant (also known as c.837G>C), located in coding exon 1 of the KCNJ5 gene, results from a G to C substitution at nucleotide position 837. The glutamic acid at codon 279 is replaced by aspartic acid, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.59
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Pathogenic	0.14
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	D;D;D
Eigen	Pathogenic	0.74
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.89	.;.;D
M_CAP	Pathogenic	0.32	D
MetaRNN	Pathogenic	0.92	D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.5	H;H;H
PhyloP100		1.7
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-2.1	N;N;N
REVEL	Pathogenic	0.69
Sift	Uncertain	0.023	D;D;D
Sift4G	Benign	0.076	T;T;T
Polyphen		1.0	D;D;D
Vest4		0.71
MutPred		0.48		Loss of disorder (P = 0.1572);Loss of disorder (P = 0.1572);Loss of disorder (P = 0.1572);
MVP		0.98
MPC		1.2
ClinPred		0.98	D
GERP RS		4.3
Varity_R		0.49
gMVP		0.69
Mutation Taster		=61/39	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: rs149861510; hg19: chr11-128782005;