rs186728422

Positions:

• chr15-73323060-A-C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_005477.3(HCN4):​c.3033T>G​(p.Ser1011=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0016 in 1,538,710 control chromosomes in the GnomAD database, including 38 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. S1011S) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.0086 (23 hom., cov: 33)
  • Exomes 𝑓: 0.00083 (15 hom.)
• Consequence: HCN4 NM_005477.3 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:6
• Conservation: PhyloP100: -0.489

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]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BP6: Variant 15-73323060-A-C is Benign according to our data. Variant chr15-73323060-A-C is described in ClinVar as [Benign]. Clinvar id is 190776.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr15-73323060-A-C is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=-0.489 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00862 (1311/152176) while in subpopulation AFR AF= 0.0298 (1237/41522). AF 95% confidence interval is 0.0284. There are 23 homozygotes in gnomad4. There are 600 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 1311 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HCN4	NM_005477.3	c.3033T>G	p.Ser1011=	synonymous_variant	8/8	ENST00000261917.4
HCN4	XM_011521148.3	c.1815T>G	p.Ser605=	synonymous_variant	7/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HCN4	ENST00000261917.4	c.3033T>G	p.Ser1011=	synonymous_variant	8/8	1	NM_005477.3	P1

Frequencies

GnomAD3 genomes AF: 0.00861 AC: 1309 AN: 152058 Hom.: 23 Cov.: 33

Gnomad AFR AF: 0.0298

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00288

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.0105

GnomAD3 exomes AF: 0.00232 AC: 359 AN: 155060 Hom.: 5 AF XY: 0.00177 AC XY: 150 AN XY: 84966

Gnomad AFR exome AF: 0.0306

Gnomad AMR exome AF: 0.00127

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: 0.0000145

Gnomad OTH exome AF: 0.000275

GnomAD4 exome AF: 0.000830 AC: 1151 AN: 1386534 Hom.: 15 Cov.: 34 AF XY: 0.000740 AC XY: 506 AN XY: 683538

Gnomad4 AFR exome AF: 0.0325

Gnomad4 AMR exome AF: 0.00129

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000139

Gnomad4 OTH exome AF: 0.00147

GnomAD4 genome AF: 0.00862 AC: 1311 AN: 152176 Hom.: 23 Cov.: 33 AF XY: 0.00806 AC XY: 600 AN XY: 74412

Gnomad4 AFR AF: 0.0298

Gnomad4 AMR AF: 0.00287

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000103

Gnomad4 OTH AF: 0.0104

Alfa AF: 0.00469 Hom.: 3

Bravo AF: 0.00960

Asia WGS AF: 0.00173 AC: 6 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 02, 2015	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 19, 2014	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. -

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 29, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Nov 21, 2018	- -

Brugada syndrome 8 Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 31, 2024

- -

Cardiovascular phenotype Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 28, 2015

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
BayesDel_noAF	Benign	-0.91
CADD	Benign	2.0
DANN	Benign	0.61

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

Other links and lift over

dbSNP: rs186728422; hg19: chr15-73615401;