NM_000890.5:c.658C>T

Variant names:

• chr11-128911931-C-T
• rs772551729
• NM_000890.5:c.658C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 4P and 4B. PP3_Strong BS2

The NM_000890.5(KCNJ5):​c.658C>T​(p.Arg220Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000414 in 1,448,014 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging 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. R220Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: KCNJ5 NM_000890.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 1.95
• Publications: 5 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, ClinGen, Labcorp Genetics (formerly Invitae)
• Andersen-Tawil syndrome

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

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

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.989
• BS2: High AC in GnomAdExome4 at 6 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000890.5. 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
	KCNJ5	NM_000890.5	MANE Select	c.658C>T	p.Arg220Trp	missense	Exon 2 of 3	NP_000881.3
	KCNJ5	NM_001354169.2		c.658C>T	p.Arg220Trp	missense	Exon 3 of 4	NP_001341098.1	P48544

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNJ5	ENST00000529694.6	TSL:1 MANE Select	c.658C>T	p.Arg220Trp	missense	Exon 2 of 3	ENSP00000433295.1	P48544
	KCNJ5	ENST00000338350.4	TSL:1	c.658C>T	p.Arg220Trp	missense	Exon 3 of 4	ENSP00000339960.4	P48544
	KCNJ5	ENST00000533599.1	TSL:1	c.658C>T	p.Arg220Trp	missense	Exon 1 of 2	ENSP00000434266.1	P48544

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000820 AC: 2 AN: 244006 AF XY: 0.00

Gnomad AFR exome AF: 0.0000617

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000901

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000414 AC: 6 AN: 1448014 Hom.: 0 Cov.: 58 AF XY: 0.00000279 AC XY: 2 AN XY: 718060

African (AFR) AF: 0.00 AC: 0 AN: 33122

American (AMR) AF: 0.00 AC: 0 AN: 44052

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25362

East Asian (EAS) AF: 0.00 AC: 0 AN: 39462

South Asian (SAS) AF: 0.00 AC: 0 AN: 84476

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52990

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5706

European-Non Finnish (NFE) AF: 0.00000544 AC: 6 AN: 1103130

Other (OTH) AF: 0.00 AC: 0 AN: 59714

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.0000165 AC: 2

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Familial hyperaldosteronism type III (1)
-	1	-	Long QT syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.98	D
Eigen	Pathogenic	0.74
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Pathogenic	0.31	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.1	H
PhyloP100		2.0
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-7.8	D
REVEL	Pathogenic	0.96
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.95		Loss of methylation at R225 (P = 0.0504)
MVP		0.96
MPC		1.3
ClinPred		1.0	D
GERP RS		4.5
Varity_R		0.92
gMVP		0.96
Mutation Taster		=18/82	disease causing

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: rs772551729; hg19: chr11-128781826; COSMIC: COSV57970468;