NM_000335.5(SCN5A):c.203A>G (p.Tyr68Cys) AND not provided

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Jul 18, 2022
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

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:: RCV002562124.3

Allele description [Variation Report for NM_000335.5(SCN5A):c.203A>G (p.Tyr68Cys)]

NM_000335.5(SCN5A):c.203A>G (p.Tyr68Cys)

Gene:

SCN5A:sodium voltage-gated channel alpha subunit 5 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

3p22.2

Genomic location:

Preferred name:

NM_000335.5(SCN5A):c.203A>G (p.Tyr68Cys)

HGVS:

NC_000003.12:g.38633105T>C
NG_008934.1:g.21568A>G
NM_000335.5:c.203A>GMANE SELECT
NM_001099404.2:c.203A>G
NM_001099405.2:c.203A>G
NM_001160160.2:c.203A>G
NM_001160161.2:c.203A>G
NM_001354701.2:c.203A>G
NM_198056.2:c.203A>G
NM_198056.3:c.203A>G
NP_000326.2:p.Tyr68Cys
NP_001092874.1:p.Tyr68Cys
NP_001092875.1:p.Tyr68Cys
NP_001153632.1:p.Tyr68Cys
NP_001153633.1:p.Tyr68Cys
NP_001341630.1:p.Tyr68Cys
NP_932173.1:p.Tyr68Cys
LRG_289t1:c.203A>G
LRG_289:g.21568A>G
NC_000003.11:g.38674596T>C

Protein change:

Y68C

Links:

dbSNP: rs1382838539

NCBI 1000 Genomes Browser:

rs1382838539

Molecular consequence:

NM_000335.5:c.203A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001099404.2:c.203A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001099405.2:c.203A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001160160.2:c.203A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001160161.2:c.203A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_001354701.2:c.203A>G - missense variant - [Sequence Ontology: SO:0001583]
NM_198056.3:c.203A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Synonyms:: none provided
Identifiers:: MedGen: C3661900

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002208125	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (May 28, 2022)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV003195098	GeneDx	criteria provided, single submitter (GeneDx Variant Classification Process June 2021)	Uncertain significance (Jul 18, 2022)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV002208125

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(May 28, 2022)

germline

clinical testing

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

SCV003195098

GeneDx

criteria provided, single submitter

(GeneDx Variant Classification Process June 2021)

Uncertain significance
(Jul 18, 2022)

germline

clinical testing

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	yes	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical 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. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV002208125.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 1437736). This variant has not been reported in the literature in individuals affected with SCN5A-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 68 of the SCN5A protein (p.Tyr68Cys).

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From GeneDx, SCV003195098.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Nov 24, 2024

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