NM_000334.4(SCN4A):c.4759_4761del (p.Leu1587del) AND Familial hyperkalemic periodic paralysis

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Oct 15, 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:: RCV003505621.2

Allele description [Variation Report for NM_000334.4(SCN4A):c.4759_4761del (p.Leu1587del)]

NM_000334.4(SCN4A):c.4759_4761del (p.Leu1587del)

Genes:

GH-LCR:growth hormone locus control region [Gene]
SCN4A:sodium voltage-gated channel alpha subunit 4 [Gene - OMIM - HGNC]

Variant type:

Deletion

Cytogenetic location:

17q23.3

Genomic location:

Preferred name:

NM_000334.4(SCN4A):c.4759_4761del (p.Leu1587del)

HGVS:

NC_000017.11:g.63941523_63941525del
NG_011699.1:g.36396_36398del
NG_042788.1:g.24431_24433del
NM_000334.4:c.4759_4761delMANE SELECT
NP_000325.4:p.Leu1587del
NC_000017.10:g.62018881_62018883del
NC_000017.10:g.62018883_62018885del

Protein change:

L1587del

Molecular consequence:

NM_000334.4:c.4759_4761del - inframe_deletion - [Sequence Ontology: SO:0001822]

Condition(s)

Name:: Familial hyperkalemic periodic paralysis
Synonyms:: Hyperkalemic periodic paralysis; Gamstorp episodic adynamy; Gamstorp disease
Identifiers:: MONDO: MONDO:0008224; MedGen: C0238357; Orphanet: 682; OMIM: 170500; Human Phenotype Ontology: HP:0007215

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004334989	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Oct 15, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004334989

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Oct 15, 2023)

germline

clinical testing

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

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
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, SCV004334989.1

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

Description

This variant, c.4759_4761del, results in the deletion of 1 amino acid(s) of the SCN4A protein (p.Leu1587del), but otherwise preserves the integrity of the reading frame. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SCN4A-related conditions. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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.

#	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

Last Updated: Sep 29, 2024

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