rs375361490

Positions:

• chr1-160042232-G-A
• chr1-160042232-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_002241.5(KCNJ10):​c.301C>T​(p.Pro101Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,592 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: KCNJ10 NM_002241.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.78

Genes affected

KCNJ10 (HGNC:6256): (potassium inwardly rectifying channel subfamily J member 10) This gene encodes a member of the inward rectifier-type potassium channel family, characterized by having a greater tendency to allow potassium to flow into, rather than out of, a cell. The encoded protein may form a heterodimer with another potassium channel protein and may be responsible for the potassium buffering action of glial cells in the brain. Mutations in this gene have been associated with seizure susceptibility of common idiopathic generalized epilepsy syndromes. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.38678098).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNJ10	NM_002241.5	c.301C>T	p.Pro101Ser	missense_variant	2/2	ENST00000644903.1	NP_002232.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNJ10	ENST00000644903.1	c.301C>T	p.Pro101Ser	missense_variant	2/2		NM_002241.5	ENSP00000495557	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461592 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727054

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

EAST syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 24, 2023

ClinVar contains an entry for this variant (Variation ID: 863438). This variant has not been reported in the literature in individuals affected with KCNJ10-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 101 of the KCNJ10 protein (p.Pro101Ser). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
CADD	Uncertain	26
DANN	Uncertain	0.98
DEOGEN2	Pathogenic	0.82	.;.;D;D;.;D;D
Eigen	Benign	0.0034
Eigen_PC	Benign	0.17
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.86	D;D;.;.;D;.;D
M_CAP	Benign	0.026	D
MetaRNN	Benign	0.39	T;T;T;T;T;T;T
MetaSVM	Uncertain	-0.21	T
MutationAssessor	Uncertain	2.2	.;.;M;M;.;M;M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-2.0	.;.;.;N;.;.;.
REVEL	Uncertain	0.34
Sift	Benign	0.13	.;.;.;T;.;.;.
Sift4G	Benign	0.15	.;.;.;T;.;.;.
Polyphen		0.013	.;.;B;B;.;B;B
Vest4		0.21
MutPred		0.37		Loss of catalytic residue at P101 (P = 0.0088);Loss of catalytic residue at P101 (P = 0.0088);Loss of catalytic residue at P101 (P = 0.0088);Loss of catalytic residue at P101 (P = 0.0088);.;Loss of catalytic residue at P101 (P = 0.0088);Loss of catalytic residue at P101 (P = 0.0088);
MVP		0.73
MPC		0.56
ClinPred		0.44	T
GERP RS		5.3
Varity_R		0.064
gMVP		0.96

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: rs375361490; hg19: chr1-160012022; COSMIC: COSV105294518; COSMIC: COSV105294518;