rs1554793270

Positions:

• chr10-49524295-C-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The ENST00000355832.10(ERCC6):​c.1135G>T​(p.Glu379Ter) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000274 in 1,461,734 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: ERCC6 ENST00000355832.10 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 3.90

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]

PGBD3 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 18 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 10-49524295-C-A is Pathogenic according to our data. Variant chr10-49524295-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 555146.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	c.1135G>T	p.Glu379Ter	stop_gained	5/21	ENST00000355832.10	NP_000115.1
ERCC6	NM_001277058.2	c.1135G>T	p.Glu379Ter	stop_gained	5/6	ENST00000447839.7	NP_001263987.1
PGBD3	NM_170753.3			upstream_gene_variant			NP_736609.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ERCC6	ENST00000355832.10	c.1135G>T	p.Glu379Ter	stop_gained	5/21	1	NM_000124.4	ENSP00000348089	P1
ERCC6	ENST00000447839.7	c.1135G>T	p.Glu379Ter	stop_gained	5/6	2	NM_001277058.2	ENSP00000387966

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461734 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727152

Gnomad4 AFR exome AF: 0.00

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

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

Likely pathogenic, criteria provided, single submitter

clinical testing

Counsyl

Nov 17, 2017

- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 02, 2022

For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. ClinVar contains an entry for this variant (Variation ID: 555146). This premature translational stop signal has been observed in individual(s) with Cockayne syndrome (PMID: 19894250). This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Glu379*) 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). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.29
CADD	Pathogenic	35
DANN	Uncertain	0.99
Eigen	Uncertain	0.43
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.88	D
MutationTaster	Benign	1.0	A
Vest4		0.58
GERP RS		3.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1554793270; hg19: chr10-50732341;