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NM_000744.7(CHRNA4):c.507del (p.Phe170fs) AND Autosomal dominant nocturnal frontal lobe epilepsy

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Jul 31, 2021
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:
RCV002023167.4

Allele description [Variation Report for NM_000744.7(CHRNA4):c.507del (p.Phe170fs)]

NM_000744.7(CHRNA4):c.507del (p.Phe170fs)

Gene:
CHRNA4:cholinergic receptor nicotinic alpha 4 subunit [Gene - OMIM - HGNC]
Variant type:
Deletion
Cytogenetic location:
20q13.33
Genomic location:
Preferred name:
NM_000744.7(CHRNA4):c.507del (p.Phe170fs)
HGVS:
  • NC_000020.11:g.63350907del
  • NG_011931.1:g.15440del
  • NM_000744.7:c.507delMANE SELECT
  • NM_001256573.2:c.-22del
  • NP_000735.1:p.Phe170fs
  • NC_000020.10:g.61982256del
  • NC_000020.10:g.61982259del
  • NR_046317.2:n.716del
Protein change:
F170fs
Links:
dbSNP: rs1250589502
NCBI 1000 Genomes Browser:
rs1250589502
Molecular consequence:
  • NM_001256573.2:c.-22del - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_000744.7:c.507del - frameshift variant - [Sequence Ontology: SO:0001589]
  • NR_046317.2:n.716del - non-coding transcript variant - [Sequence Ontology: SO:0001619]

Condition(s)

Name:
Autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE)
Identifiers:
MONDO: MONDO:0020300; MedGen: C3696898

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV002301624Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Jul 31, 2021) 		germlineclinical testing

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

Help

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. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]
PMID:
28492532
PMCID:
PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV002301624.3

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

Description

This sequence change creates a premature translational stop signal (p.Phe170Serfs*8) in the CHRNA4 gene. It is expected to result in an absent or disrupted protein product. However, the current clinical and genetic evidence is not sufficient to establish whether loss-of-function variants in CHRNA4 cause disease. 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. This variant has not been reported in the literature in individuals affected with CHRNA4-related conditions. This variant is not present in population databases (ExAC no frequency).

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

Last Updated: Sep 29, 2024