Variant 17-42163819-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_012285.3(KCNH4):c.2264G>A(p.Arg755Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000355 in 1,522,224 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000020 ( 1 hom. )

Consequence

KCNH4
NM_012285.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.63

Variant links:

Genes affected

KCNH4 (HGNC:6253): (potassium voltage-gated channel subfamily H member 4) Voltage-gated potassium (Kv) channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. This gene encodes a member of the potassium channel, voltage-gated, subfamily H. This member is a pore-forming (alpha) subunit. The gene is brain-specific, and located in the neocortex and the striatum. It may be involved in cellular excitability of restricted neurons in the central nervous system. [provided by RefSeq, Jul 2008]

KCNH4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.036899924).

BS2

High AC in GnomAd4 at 26 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNH4	NM_012285.3 linkuse as main transcript	c.2264G>A	p.Arg755Gln	missense_variant	13/17	ENST00000264661.4	NP_036417.1	Q9UQ05

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNH4	ENST00000264661.4 linkuse as main transcript	c.2264G>A	p.Arg755Gln	missense_variant	13/17	1	NM_012285.3	ENSP00000264661.2		Q9UQ05
KCNH4	ENST00000607371.5 linkuse as main transcript	c.2264G>A	p.Arg755Gln	missense_variant	13/17	5		ENSP00000475564.1		Q9UQ05

Frequencies

GnomAD3 genomes

AF:

0.000171

AC:

AN:

152036

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000887

AC:

AN:

124028

Hom.:

AF XY:

0.0000612

AC XY:

AN XY:

65360

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000216

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000946

Gnomad SAS exome

AF:

0.0000581

Gnomad FIN exome

AF:

0.0000732

Gnomad NFE exome

AF:

0.0000422

Gnomad OTH exome

AF:

0.000587

GnomAD4 exome

AF:

0.0000204

AC:

AN:

1370070

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

674472

show subpopulations

Gnomad4 AFR exome

AF:

0.0000328

Gnomad4 AMR exome

AF:

0.000304

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000276

Gnomad4 SAS exome

AF:

0.0000268

Gnomad4 FIN exome

AF:

0.0000619

Gnomad4 NFE exome

AF:

0.00000656

Gnomad4 OTH exome

AF:

0.0000708

GnomAD4 genome

AF:

0.000171

AC:

AN:

152154

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.00124

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.0000589

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000109

Hom.:

Bravo

AF:

0.000208

ExAC

AF:

0.0000354

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 17, 2024

The c.2264G>A (p.R755Q) alteration is located in exon 13 (coding exon 13) of the KCNH4 gene. This alteration results from a G to A substitution at nucleotide position 2264, causing the arginine (R) at amino acid position 755 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.066

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.25

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.22

T;T

Eigen

Benign

-0.44

Eigen_PC

Benign

-0.34

FATHMM_MKL

Benign

0.68

LIST_S2

Benign

0.70

.;T

M_CAP

Uncertain

0.22

MetaRNN

Benign

0.037

T;T

MetaSVM

Uncertain

0.55

MutationAssessor

Benign

1.0

L;L

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-0.55

.;N

REVEL

Benign

0.24

Sift

Benign

0.24

.;T

Sift4G

Benign

0.55

T;T

Polyphen

0.15

B;B

Vest4

0.13

MVP

0.59

MPC

0.32

ClinPred

0.034

GERP RS

1.6

Varity_R

0.075

gMVP

0.46

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over