rs144450232

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_005477.3(HCN4):c.2831C>T(p.Ala944Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000769 in 1,525,396 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0038 ( 3 hom., cov: 33)

Exomes 𝑓: 0.00044 ( 4 hom. )

Consequence

HCN4
NM_005477.3 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 2.17

Variant links:

Genes affected

HCN4 (HGNC:16882): (hyperpolarization activated cyclic nucleotide gated potassium channel 4) This gene encodes a member of the hyperpolarization-activated cyclic nucleotide-gated potassium channels. The encoded protein shows slow kinetics of activation and inactivation, and is necessary for the cardiac pacemaking process. This channel may also mediate responses to sour stimuli. Mutations in this gene have been linked to sick sinus syndrome 2, also known as atrial fibrillation with bradyarrhythmia or familial sinus bradycardia. Two pseudogenes have been identified on chromosome 15. [provided by RefSeq, Oct 2008]

HCN4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.004862994).

BP6

Variant 15-73323262-G-A is Benign according to our data. Variant chr15-73323262-G-A is described in ClinVar as [Benign]. Clinvar id is 190775.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr15-73323262-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00377 (574/152268) while in subpopulation AFR AF= 0.0133 (551/41556). AF 95% confidence interval is 0.0123. There are 3 homozygotes in gnomad4. There are 273 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 574 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HCN4	NM_005477.3 link	c.2831C>T	p.Ala944Val	missense_variant	Exon 8 of 8	ENST00000261917.4	NP_005468.1	Q9Y3Q4
HCN4	XM_011521148.3 link	c.1613C>T	p.Ala538Val	missense_variant	Exon 7 of 7		XP_011519450.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HCN4	ENST00000261917.4 link	c.2831C>T	p.Ala944Val	missense_variant	Exon 8 of 8	1	NM_005477.3	ENSP00000261917.3		Q9Y3Q4

Frequencies

GnomAD3 genomes

AF:

0.00375

AC:

570

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0132

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00118

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000957

GnomAD3 exomes

AF:

0.00121

AC:

168

AN:

138888

Hom.:

AF XY:

0.00104

AC XY:

AN XY:

73938

show subpopulations

Gnomad AFR exome

AF:

0.0156

Gnomad AMR exome

AF:

0.00105

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000122

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000172

Gnomad OTH exome

AF:

0.000279

GnomAD4 exome

AF:

0.000436

AC:

599

AN:

1373128

Hom.:

Cov.:

AF XY:

0.000381

AC XY:

256

AN XY:

672768

show subpopulations

Gnomad4 AFR exome

AF:

0.0147

Gnomad4 AMR exome

AF:

0.000755

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000527

Gnomad4 SAS exome

AF:

0.0000409

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000431

Gnomad4 OTH exome

AF:

0.000880

GnomAD4 genome

AF:

0.00377

AC:

574

AN:

152268

Hom.:

Cov.:

AF XY:

0.00367

AC XY:

273

AN XY:

74470

show subpopulations

Gnomad4 AFR

AF:

0.0133

Gnomad4 AMR

AF:

0.00118

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000194

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000947

Alfa

AF:

0.00186

Hom.:

Bravo

AF:

0.00451

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.0118

AC:

ESP6500EA

AF:

0.000404

AC:

ExAC

AF:

0.000895

AC:

103

ClinVar

Significance: Benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Sep 02, 2014

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Mar 02, 2015

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Nov 20, 2017

Athena Diagnostics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Brugada syndrome 8

Benign:1

Feb 02, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Benign:1

Sep 17, 2015

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.26

CADD

Benign

DANN

Benign

0.94

DEOGEN2

Benign

0.20

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.043

LIST_S2

Benign

0.41

MetaRNN

Benign

0.0049

MetaSVM

Uncertain

-0.21

MutationAssessor

Benign

0.55

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-0.23

REVEL

Benign

0.14

Sift

Benign

0.17

Sift4G

Benign

0.52

Polyphen

0.0050

Vest4

0.12

MVP

0.63

MPC

0.17

ClinPred

0.0064

GERP RS

1.9

Varity_R

0.047

gMVP

0.17

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

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