Genetic Variant NM_001194.4:c.1239G>A (chr19-607984-G-A) – ACMG Classification: Benign (-15 pts)

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 0P and 15B. BP4_StrongBP6_ModerateBP7BS1BS2

The NM_001194.4(HCN2):c.1239G>A(p.Leu413Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00116 in 1,612,242 control chromosomes in the GnomAD database, including 20 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★). Synonymous variant affecting the same amino acid position (i.e. L413L) has been classified as Benign.

Frequency

Genomes: 𝑓 0.00088 ( 1 hom., cov: 33)

Exomes 𝑓: 0.0012 ( 19 hom. )

Consequence

HCN2
NM_001194.4 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:2

Conservation

PhyloP100: -1.76

Publications

16 publications found

Variant links:

Genes affected

HCN2 (HGNC:4846): (hyperpolarization activated cyclic nucleotide gated potassium and sodium channel 2) The protein encoded by this gene is a hyperpolarization-activated cation channel involved in the generation of native pacemaker activity in the heart and in the brain. The encoded protein is activated by cAMP and can produce a fast, large current. Defects in this gene were noted as a possible cause of some forms of epilepsy. [provided by RefSeq, Jan 2017]

HCN2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.55).

BP6

Variant 19-607984-G-A is Benign according to our data. Variant chr19-607984-G-A is described in ClinVar as Benign. ClinVar VariationId is 769444.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-1.76 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00088 (134/152302) while in subpopulation SAS AF = 0.0108 (52/4830). AF 95% confidence interval is 0.00843. There are 1 homozygotes in GnomAd4. There are 71 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High AC in GnomAd4 at 134 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HCN2	NM_001194.4 link	c.1239G>A	p.Leu413Leu	synonymous_variant	Exon 4 of 8	ENST00000251287.3	NP_001185.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HCN2	ENST00000251287.3 link	c.1239G>A	p.Leu413Leu	synonymous_variant	Exon 4 of 8	1	NM_001194.4	ENSP00000251287.1		Q9UL51

Frequencies

GnomAD3 genomes

AF:

0.000874

AC:

133

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000981

Gnomad ASJ

AF:

0.00346

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.0106

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000750

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00150

AC:

373

AN:

248694

AF XY:

0.00196

show subpopulations

Gnomad AFR exome

AF:

0.0000621

Gnomad AMR exome

AF:

0.000319

Gnomad ASJ exome

AF:

0.00190

Gnomad EAS exome

AF:

0.0000545

Gnomad FIN exome

AF:

0.0000929

Gnomad NFE exome

AF:

0.000726

Gnomad OTH exome

AF:

0.000655

GnomAD4 exome

AF:

0.00118

AC:

1729

AN:

1459940

Hom.:

Cov.:

AF XY:

0.00141

AC XY:

1022

AN XY:

726298

show subpopulations

African (AFR)

AF:

0.000120

AC:

AN:

33464

American (AMR)

AF:

0.000380

AC:

AN:

44702

Ashkenazi Jewish (ASJ)

AF:

0.00180

AC:

AN:

26130

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39686

South Asian (SAS)

AF:

0.00902

AC:

778

AN:

86216

European-Finnish (FIN)

AF:

0.0000382

AC:

AN:

52324

Middle Eastern (MID)

AF:

0.00307

AC:

AN:

5212

European-Non Finnish (NFE)

AF:

0.000716

AC:

796

AN:

1111874

Other (OTH)

AF:

0.00113

AC:

AN:

60332

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

198

296

395

494

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<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:

0.000880

AC:

134

AN:

152302

Hom.:

Cov.:

AF XY:

0.000954

AC XY:

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.0000963

AC:

AN:

41558

American (AMR)

AF:

0.000980

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00346

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.0108

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000750

AC:

AN:

68030

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000469

Hom.:

EpiCase

AF:

0.00104

EpiControl

AF:

0.00136

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

HCN2-related disorder

Benign:1

Mar 27, 2024

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

not provided

Benign:1

Mar 07, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.55

CADD

Benign

0.26

(source)

DANN

Benign

0.86

PhyloP100

-1.8

Mutation Taster

=100/0

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over