NM_000124.4:c.2960T>C

Variant names:

• chr10-49471085-A-G
• rs121917905
• NM_000124.4:c.2960T>C

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_000124.4(ERCC6):​c.2960T>C​(p.Leu987Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L987I) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ERCC6 NM_000124.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 9.32
• Publications: 7 publications found

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 Gene-Disease associations (from GenCC):

• Cockayne spectrum with or without cerebrooculofacioskeletal syndrome

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Cockayne syndrome type 2

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Myriad Women’s Health, Orphanet, Genomics England PanelApp, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• UV-sensitive syndrome 1

  Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
• COFS syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• UV-sensitive syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• premature ovarian failure 11

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ENSG00000235939 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.984

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000124.4. 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
	ERCC6	NM_000124.4	MANE Select	c.2960T>C	p.Leu987Pro	missense	Exon 17 of 21	NP_000115.1
	ERCC6	NM_001346440.2		c.2960T>C	p.Leu987Pro	missense	Exon 17 of 21	NP_001333369.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ERCC6	ENST00000355832.10	TSL:1 MANE Select	c.2960T>C	p.Leu987Pro	missense	Exon 17 of 21	ENSP00000348089.5
	ERCC6	ENST00000623073.3	TSL:1	n.7344T>C		non_coding_transcript_exon	Exon 11 of 15
	ERCC6	ENST00000624341.3	TSL:1	n.*559T>C		non_coding_transcript_exon	Exon 7 of 11	ENSP00000485163.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cerebrooculofacioskeletal syndrome 1 Pathogenic:1

Sep 01, 2008

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

not specified Uncertain:1

Dec 10, 2024

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

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: ERCC6 c.2960T>C (p.Leu987Pro) results in a non-conservative amino acid change located in the C-terminal helicase domain of the SNF family helicases (IPR049730) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 250964 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.2960T>C has been reported in the literature in a compound heterozygous individual affected with Cockayne Syndrome (Laugel_2008). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 18628313). ClinVar contains an entry for this variant (Variation ID: 1712). Based on the evidence outlined above, the variant was classified as uncertain significance.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.41
CADD	Pathogenic	30
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.65	D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.97
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.85	D
MutationAssessor	Pathogenic	4.2	H
PhyloP100		9.3
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-6.8	D
REVEL	Pathogenic	0.94
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.96
MutPred		0.92		Gain of disorder (P = 0.0125)
MVP		0.90
MPC		0.64
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.89
gMVP		0.96
Mutation Taster		=1/99	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121917905; hg19: chr10-50679131;