dbSNP rs776541110: KCNH2:p.Ala175Asp (chr7-150958451-G-T) – ACMG Classification: Benign (-15 pts)

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 1P and 16B. PP2BP4_StrongBP6_Very_StrongBS2

The NM_000238.4(KCNH2):c.524C>A(p.Ala175Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000252 in 1,466,246 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 Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A175S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

KCNH2
NM_000238.4 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.900

Publications

0 publications found

Variant links:

Genes affected

KCNH2 (HGNC:6251): (potassium voltage-gated channel subfamily H member 2) This gene encodes a component of a voltage-activated potassium channel found in cardiac muscle, nerve cells, and microglia. Four copies of this protein interact with one copy of the KCNE2 protein to form a functional potassium channel. Mutations in this gene can cause long QT syndrome type 2 (LQT2). Transcript variants encoding distinct isoforms have been identified. [provided by RefSeq, May 2022]

KCNH2 Gene-Disease associations (from GenCC):

long QT syndrome
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
long QT syndrome 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
short QT syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
short QT syndrome type 1
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
Brugada syndrome
Inheritance: AD Classification: MODERATE, NO_KNOWN Submitted by: ClinGen, Genomics England PanelApp

KCNH2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -15 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 158 curated pathogenic missense variants (we use a threshold of 10). The gene has 38 curated benign missense variants. Gene score misZ: 3.3724 (above the threshold of 3.09). Trascript score misZ: 2.4846 (below the threshold of 3.09). GenCC associations: The gene is linked to long QT syndrome 2, Brugada syndrome, short QT syndrome type 1, short QT syndrome, long QT syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.05708748).

BP6

Variant 7-150958451-G-T is Benign according to our data. Variant chr7-150958451-G-T is described in ClinVar as Likely_benign. ClinVar VariationId is 200211.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High AC in GnomAdExome4 at 33 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000238.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KCNH2	NM_000238.4	MANE Select	c.524C>A	p.Ala175Asp	missense	Exon 4 of 15	NP_000229.1	A0A090N8Q0
KCNH2	NM_001406753.1		c.236C>A	p.Ala79Asp	missense	Exon 2 of 13	NP_001393682.1	Q12809-7
KCNH2	NM_172056.3		c.524C>A	p.Ala175Asp	missense	Exon 4 of 9	NP_742053.1	Q12809-5

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KCNH2	ENST00000262186.10	TSL:1 MANE Select	c.524C>A	p.Ala175Asp	missense	Exon 4 of 15	ENSP00000262186.5	Q12809-1
KCNH2	ENST00000713710.1		c.524C>A	p.Ala175Asp	missense	Exon 4 of 15	ENSP00000519013.1	A0AAQ5BGR0
KCNH2	ENST00000713701.1		c.224C>A	p.Ala75Asp	missense	Exon 3 of 14	ENSP00000519004.1	A0AAQ5BGQ9

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152050

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000865

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000945

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000104

AC:

AN:

77210

AF XY:

0.000135

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00122

Gnomad EAS 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:

0.0000251

AC:

AN:

1314196

Hom.:

Cov.:

AF XY:

0.0000278

AC XY:

AN XY:

647794

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26596

American (AMR)

AF:

0.00

AC:

AN:

25548

Ashkenazi Jewish (ASJ)

AF:

0.00113

AC:

AN:

23042

East Asian (EAS)

AF:

0.00

AC:

AN:

28508

South Asian (SAS)

AF:

0.00

AC:

AN:

71666

European-Finnish (FIN)

AF:

0.0000612

AC:

AN:

32674

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4210

European-Non Finnish (NFE)

AF:

0.00000477

AC:

AN:

1047574

Other (OTH)

AF:

0.00

AC:

AN:

54378

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.542

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152050

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74282

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41434

American (AMR)

AF:

0.00

AC:

AN:

15266

Ashkenazi Jewish (ASJ)

AF:

0.000865

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.00

AC:

AN:

4838

European-Finnish (FIN)

AF:

0.0000945

AC:

AN:

10582

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67984

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000376

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.0000707

AC:

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cardiovascular phenotype (1)

Long QT syndrome (1)

Long QT syndrome 2 (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

CardioboostArm

Benign

0.00048

BayesDel_addAF

Uncertain

0.060

BayesDel_noAF

Benign

-0.15

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.41

Eigen

Benign

-0.56

Eigen_PC

Benign

-0.50

FATHMM_MKL

Benign

0.19

LIST_S2

Benign

0.57

M_CAP

Pathogenic

0.32

MetaRNN

Benign

0.057

MetaSVM

Uncertain

0.53

MutationAssessor

Benign

1.4

PhyloP100

0.90

PrimateAI

Uncertain

0.79

PROVEAN

Benign

-1.0

REVEL

Uncertain

0.40

Sift

Benign

0.21

Sift4G

Benign

0.22

Polyphen

0.010

Vest4

0.19

MutPred

0.54

Loss of loop (P = 0.0128)

MVP

0.52

MPC

1.5

ClinPred

0.080

GERP RS

3.9

Varity_R

0.12

gMVP

0.50

Mutation Taster

=69/31

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over