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NM_005477.3(HCN4):c.3203G>A (p.Arg1068His) AND Brugada syndrome 8

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Dec 6, 2023
Review status:
1 star out of maximum of 4 stars
criteria provided, single submitter
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV000821551.7

Allele description [Variation Report for NM_005477.3(HCN4):c.3203G>A (p.Arg1068His)]

NM_005477.3(HCN4):c.3203G>A (p.Arg1068His)

Gene:
HCN4:hyperpolarization activated cyclic nucleotide gated potassium channel 4 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
15q24.1
Genomic location:
Preferred name:
NM_005477.3(HCN4):c.3203G>A (p.Arg1068His)
HGVS:
  • NC_000015.10:g.73322890C>T
  • NG_009063.1:g.51375G>A
  • NM_005477.3:c.3203G>AMANE SELECT
  • NP_005468.1:p.Arg1068His
  • NC_000015.9:g.73615231C>T
  • NM_005477.2:c.3203G>A
Protein change:
R1068H
Links:
dbSNP: rs776270218
NCBI 1000 Genomes Browser:
rs776270218
Molecular consequence:
  • NM_005477.3:c.3203G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Brugada syndrome 8 (BRGDA8)
Identifiers:
MONDO: MONDO:0013148; MedGen: C2751083; Orphanet: 130; OMIM: 613123

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV000962310Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Dec 6, 2023) 		germlineclinical testing

PubMed (2)
[See all records that cite these PMIDs]

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Citations

PubMed

A novel trafficking-defective HCN4 mutation is associated with early-onset atrial fibrillation.

Macri V, Mahida SN, Zhang ML, Sinner MF, Dolmatova EV, Tucker NR, McLellan M, Shea MA, Milan DJ, Lunetta KL, Benjamin EJ, Ellinor PT.

Heart Rhythm. 2014 Jun;11(6):1055-1062. doi: 10.1016/j.hrthm.2014.03.002. Epub 2014 Mar 4.

PubMed [citation]
PMID:
24607718
PMCID:
PMC4130372

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]
PMID:
28492532
PMCID:
PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000962310.4

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (2)

Description

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 1068 of the HCN4 protein (p.Arg1068His). This variant is present in population databases (rs776270218, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with HCN4-related conditions. ClinVar contains an entry for this variant (Variation ID: 663635). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt HCN4 protein function with a negative predictive value of 95%. Experimental studies have shown that this missense change does not substantially affect HCN4 function (PMID: 24607718). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024