NM_000124.4(ERCC6):c.1659G>T (p.Lys553Asn) AND not provided

Germline classification:: Uncertain significance (4 submissions)
Last evaluated:: Oct 31, 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:: RCV000723972.15

Allele description [Variation Report for NM_000124.4(ERCC6):c.1659G>T (p.Lys553Asn)]

NM_000124.4(ERCC6):c.1659G>T (p.Lys553Asn)

Gene:

ERCC6:ERCC excision repair 6, chromatin remodeling factor [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

10q11.23

Genomic location:

Preferred name:

NM_000124.4(ERCC6):c.1659G>T (p.Lys553Asn)

HGVS:

NC_000010.11:g.49500564C>A
NG_009442.1:g.43538G>T
NM_000124.4:c.1659G>TMANE SELECT
NM_001346440.2:c.1659G>T
NP_000115.1:p.Lys553Asn
NP_001333369.1:p.Lys553Asn
LRG_465t1:c.1659G>T
LRG_465:g.43538G>T
NC_000010.10:g.50708610C>A
NM_000124.2:c.1659G>T
NM_000124.3:c.1659G>T

Protein change:

K553N

Links:

dbSNP: rs116373975

NCBI 1000 Genomes Browser:

rs116373975

Molecular consequence:

NM_000124.4:c.1659G>T - missense variant - [Sequence Ontology: SO:0001583]
NM_001346440.2:c.1659G>T - missense variant - [Sequence Ontology: SO:0001583]

Observations:

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
SCV000232006	Eurofins Ntd Llc (ga)	criteria provided, single submitter (EGL Classification Definitions 2015)	Uncertain significance (Dec 22, 2015)	germline	clinical testing	Citation Link,
SCV000570524	GeneDx	criteria provided, single submitter (GeneDx Variant Classification (06012015))	Uncertain significance (Feb 13, 2017)	germline	clinical testing	Citation Link,
SCV003033354	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Oct 31, 2022)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV005190734	Breakthrough Genomics, Breakthrough Genomics	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance	germline	not provided	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	yes	not provided	not provided	not provided	not provided	not provided	clinical testing, not provided
not provided	germline	unknown	2	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

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee.

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

Details of each submission

From Eurofins Ntd Llc (ga), SCV000232006.5

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	2	not provided	not provided	clinical testing	not provided

#	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		2	not provided	not provided	not provided

From GeneDx, SCV000570524.4

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

Description

The K553N variant in the ERCC6 gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. The K553N variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The K553N variant is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position where amino acids with similar properties to lysine are tolerated across species. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. We interpret K553N as a variant of uncertain significance.

#	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

From Labcorp Genetics (formerly Invitae), Labcorp, SCV003033354.1

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

Description

This sequence change replaces lysine, which is basic and polar, with asparagine, which is neutral and polar, at codon 553 of the ERCC6 protein (p.Lys553Asn). This variant is present in population databases (rs116373975, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with ERCC6-related conditions. ClinVar contains an entry for this variant (Variation ID: 190151). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on ERCC6 protein function. 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

From Breakthrough Genomics, Breakthrough Genomics, SCV005190734.1

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

#	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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