NM_000082.4:c.313_314delGT

Variant names:

• chr5-60918349-TAC-T
• rs1404477615
• NM_000082.4:c.313_314delGT

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000082.4(ERCC8):​c.313_314delGT​(p.Val105ThrfsTer6) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. V105V) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ERCC8 NM_000082.4 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 8.83
• Publications: 0 publications found

Genes affected

ERCC8 (HGNC:3439): (ERCC excision repair 8, CSA ubiquitin ligase complex subunit) This gene encodes a WD repeat protein, which interacts with Cockayne syndrome type B (CSB) protein and with p44 protein, a subunit of the RNA polymerase II transcription factor IIH. Mutations in this gene have been identified in patients with hereditary disease Cockayne syndrome (CS). CS cells are abnormally sensitive to ultraviolet radiation and are defective in the repair of transcriptionally active genes. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2014]

ERCC8-AS1 (HGNC:40220): (ERCC8 antisense RNA 1)

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 5-60918349-TAC-T is Pathogenic according to our data. Variant chr5-60918349-TAC-T is described in ClinVar as Pathogenic. ClinVar VariationId is 558687.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000082.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ERCC8	NM_000082.4	MANE Select	c.313_314delGT	p.Val105ThrfsTer6	frameshift	Exon 4 of 12	NP_000073.1
	ERCC8	NM_001007233.3		c.139_140delGT	p.Val47ThrfsTer6	frameshift	Exon 5 of 13	NP_001007234.1
	ERCC8	NM_001007234.3		c.313_314delGT	p.Val105ThrfsTer6	frameshift	Exon 4 of 6	NP_001007235.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ERCC8	ENST00000676185.1	MANE Select	c.313_314delGT	p.Val105ThrfsTer6	frameshift	Exon 4 of 12	ENSP00000501614.1
	ERCC8	ENST00000265038.10	TSL:1	c.313_314delGT	p.Val105ThrfsTer6	frameshift	Exon 4 of 13	ENSP00000265038.6
	ERCC8	ENST00000497892.6	TSL:1	n.*111_*112delGT		non_coding_transcript_exon	Exon 5 of 7	ENSP00000501805.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Feb 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Val105Thrfs*6) in the ERCC8 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ERCC8 are known to be pathogenic (PMID: 29572252). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with Cockayne syndrome (PMID: 16865293). This variant is also known as T104fsdelTG. ClinVar contains an entry for this variant (Variation ID: 558687). For these reasons, this variant has been classified as Pathogenic.

Cockayne syndrome type 1 Pathogenic:1

Jun 05, 2018

Counsyl

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		8.8
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs1404477615; hg19: chr5-60214176;