Variant chr12-49557188-G-A details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_012284.3(KCNH3):c.2581G>A(p.Gly861Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000384 in 1,613,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

KCNH3
NM_012284.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.817

Variant links:

Genes affected

KCNH3 (HGNC:6252): (potassium voltage-gated channel subfamily H member 3) The protein encoded by this gene is a voltage-gated potassium channel alpha subunit predominantly expressed in the forebrain. Studies in mice have found that cognitive function increases when this gene is knocked out. In humans, the encoded protein has been shown to be capable of binding glycoprotein 120 of the human immunodeficiency virus type 1 (HIV-1) envelope. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2015]

KCNH3 links:

MCRS1 (HGNC:6960): (microspherule protein 1) Enables RNA binding activity and telomerase inhibitor activity. Involved in histone H4 acetylation; negative regulation of DNA metabolic process; and positive regulation of protein localization to nucleolus. Located in cytoplasm; nucleolus; and nucleoplasm. Part of Ino80 complex; MLL1 complex; and histone acetyltransferase complex. [provided by Alliance of Genome Resources, Apr 2022]

MCRS1 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=0.015042871).

BS2

High AC in GnomAd4 at 27 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNH3	NM_012284.3 link	c.2581G>A	p.Gly861Ser	missense_variant	14/15	ENST00000257981.7	NP_036416.1	Q9ULD8
KCNH3	NM_001314030.2 link	c.2401G>A	p.Gly801Ser	missense_variant	14/15		NP_001300959.1	Q9ULD8
KCNH3	XM_011538085.3 link	c.2614G>A	p.Gly872Ser	missense_variant	14/15		XP_011536387.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNH3	ENST00000257981.7 link	c.2581G>A	p.Gly861Ser	missense_variant	14/15	1	NM_012284.3	ENSP00000257981.5		Q9ULD8

Frequencies

GnomAD3 genomes

AF:

0.000178

AC:

AN:

152062

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000580

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

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

GnomAD3 exomes

AF:

0.0000518

AC:

AN:

251200

Hom.:

AF XY:

0.0000442

AC XY:

AN XY:

135806

show subpopulations

Gnomad AFR exome

AF:

0.000492

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000239

AC:

AN:

1461706

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727170

show subpopulations

Gnomad4 AFR exome

AF:

0.000418

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.000177

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74414

show subpopulations

Gnomad4 AFR

AF:

0.000578

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000230

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

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

Jan 09, 2024

The c.2581G>A (p.G861S) alteration is located in exon 14 (coding exon 14) of the KCNH3 gene. This alteration results from a G to A substitution at nucleotide position 2581, causing the glycine (G) at amino acid position 861 to be replaced by a serine (S). 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

0.084

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.32

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.10

Eigen

Benign

-0.83

Eigen_PC

Benign

-0.73

FATHMM_MKL

Benign

0.075

LIST_S2

Benign

0.71

M_CAP

Benign

0.066

MetaRNN

Benign

0.015

MetaSVM

Uncertain

0.16

MutationAssessor

Benign

0.34

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.60

REVEL

Benign

0.25

Sift

Benign

0.14

Sift4G

Benign

0.53

Polyphen

0.0010

Vest4

0.17

MVP

0.43

MPC

0.15

ClinPred

0.017

GERP RS

1.5

Varity_R

0.046

gMVP

0.40

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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