NM_005477.3(HCN4):c.724C>T (p.Arg242Cys) AND Brugada syndrome 8

Clinical significance:Uncertain significance (Last evaluated: Sep 2, 2020)

Review status:1 star out of maximum of 4 stars

criteria provided, single submitter

Based on:
1 submission [Details]
Record status:
current
Accession:
RCV000227069.3

Allele description [Variation Report for NM_005477.3(HCN4):c.724C>T (p.Arg242Cys)]

NM_005477.3(HCN4):c.724C>T (p.Arg242Cys)

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.724C>T (p.Arg242Cys)
HGVS:
  • NC_000015.10:g.73367547G>A
  • NG_009063.1:g.6718C>T
  • NM_005477.3:c.724C>TMANE SELECT
  • NP_005468.1:p.Arg242Cys
  • NC_000015.9:g.73659888G>A
  • NM_005477.2:c.724C>T
  • p.(Arg242Cys)
Protein change:
R242C
Links:
dbSNP: rs745880598
NCBI 1000 Genomes Browser:
rs745880598
Molecular consequence:
  • NM_005477.3:c.724C>T - 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

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV000288917Invitaecriteria provided, single submitter
Uncertain significance
(Sep 2, 2020)
germlineclinical testing

PubMed (1)
[See all records that cite this PMID]

Summary from all submissions

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

Citations

PubMed

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):240-242.

PubMed [citation]
PMID:
28492532
PMCID:
PMC5632818

Details of each submission

From Invitae, SCV000288917.4

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

Description

This sequence change replaces arginine with cysteine at codon 242 of the HCN4 protein (p.Arg242Cys). The arginine residue is highly conserved and there is a large physicochemical difference between arginine and cysteine. This variant is present in population databases (rs745880598, ExAC 0.03%). This variant has not been reported in the literature in individuals with HCN4-related conditions. ClinVar contains an entry for this variant (Variation ID: 240173). Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: Deleterious; PolyPhen-2: Probably Damaging; Align-GVGD: Class C0). 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: Oct 7, 2021

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