chr10-49461381-CCT-C

Position:

chr10-49461381-CCT-C

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_000124.4(ERCC6):c.3952_3953del(p.Arg1318GlyfsTer12) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000217 in 1,613,620 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000022 ( 0 hom. )

Consequence

ERCC6
NM_000124.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 1.30

Variant links:

Genes affected

ERCC6 (HGNC:3438): (ERCC excision repair 6, chromatin remodeling factor) This gene encodes a DNA-binding protein that is important in transcription-coupled excision repair. The encoded protein has ATP-stimulated ATPase activity, interacts with several transcription and excision repair proteins, and may promote complex formation at DNA repair sites. Mutations in this gene are associated with Cockayne syndrome type B and cerebrooculofacioskeletal syndrome 1. Alternative splicing occurs between a splice site from exon 5 of this gene to the 3' splice site upstream of the open reading frame (ORF) of the adjacent gene, piggyback-derived-3 (GeneID:267004), which activates the alternative polyadenylation site downstream of the piggyback-derived-3 ORF. The resulting transcripts encode a fusion protein that shares sequence with the product of each individual gene. [provided by RefSeq, Mar 2016]

ERCC6 links:

(HGNC:):

links:

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 10-49461381-CCT-C is Pathogenic according to our data. Variant chr10-49461381-CCT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 190171.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ERCC6	NM_000124.4 linkuse as main transcript	c.3952_3953del	p.Arg1318GlyfsTer12	frameshift_variant	19/21	ENST00000355832.10	NP_000115.1
ERCC6	NM_001346440.2 linkuse as main transcript	c.3952_3953del	p.Arg1318GlyfsTer12	frameshift_variant	19/21		NP_001333369.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ERCC6	ENST00000355832.10 linkuse as main transcript	c.3952_3953del	p.Arg1318GlyfsTer12	frameshift_variant	19/21	1	NM_000124.4	ENSP00000348089	P1	Q03468-1
	ENST00000423283.1 linkuse as main transcript	n.235-11321_235-11320del		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

251212

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135778

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000440

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000219

AC:

AN:

1461428

Hom.:

AF XY:

0.0000206

AC XY:

AN XY:

727042

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Cerebrooculofacioskeletal syndrome 1;C0265201:DE SANCTIS-CACCHIONE SYNDROME;C0751038:Cockayne syndrome type 2

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	research	UNC Molecular Genetics Laboratory, University of North Carolina at Chapel Hill	-	The c.3952_3953delAG (p.R1318Gfs) variant is a frameshift deletion of two nucleotides predicted to result in a nonfunctional ERCC6 protein. -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Apr 10, 2017	- -

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	May 08, 2024	Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Reported in two unrelated patients with Cockayne syndrome who each harbored another variant in the ERCC6 gene (PMID: 29572252); Identified in a patient with a clinical diagnosis and family history of hearing loss, loss of ambulation, hypotonia, cerebellar ataxia and sensory neuropathy who underwent exome sequencing; this individual also harbored an intronic variant in ERCC6 though its clinical significance was considered to be unknown (PMID: 31130284); This variant is associated with the following publications: (PMID: 18628313, 9443879, 31130284, 29572252) -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 29, 2023	This sequence change creates a premature translational stop signal (p.Arg1318Glyfs*12) in the ERCC6 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ERCC6 are known to be pathogenic (PMID: 18628313, 29572252). This variant is present in population databases (rs765825423, gnomAD 0.004%). This premature translational stop signal has been observed in individual(s) with Cockayne syndrome type B (PMID: 29572252). ClinVar contains an entry for this variant (Variation ID: 190171). For these reasons, this variant has been classified as Pathogenic. -

Cockayne syndrome type 2

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Claritas Genomics

Oct 22, 2013

- -

Cockayne syndrome

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jun 23, 2022

Variant summary: ERCC6 c.3952_3953delAG (p.Arg1318GlyfsX12) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic in ClinVar database. The variant allele was found at a frequency of 2e-05 in 251212 control chromosomes (gnomAD). c.3952_3953delAG has been reported in the literature in two individuals affected with Cockayne Syndrome (Calmels_2018), one individual with clinical diagnosis and family history of hearing loss, loss of ambulation, hypotonia, cerebellar ataxia and sensory neuropathy (Monies_2019), one individual affected with acute lymphoblastic leukemia (Qin_2020) and one individual affected with malignant peritoneal mesothelioma (Hung_2020). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three ClinVar submitters (evaluation after 2014) cite the variant as pathogenic (n=2) and likely pathogenic (n=1). Based on the evidence outlined above, the variant was classified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over