13-102868199-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_000123.4(ERCC5):c.2620G>A(p.Ala874Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000372 in 1,614,042 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

ERCC5
NM_000123.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:3

Conservation

PhyloP100: 9.88

Variant links:

Genes affected

ERCC5 (HGNC:3437): (ERCC excision repair 5, endonuclease) This gene encodes a single-strand specific DNA endonuclease that makes the 3' incision in DNA excision repair following UV-induced damage. The protein may also function in other cellular processes, including RNA polymerase II transcription, and transcription-coupled DNA repair. Mutations in this gene cause xeroderma pigmentosum complementation group G (XP-G), which is also referred to as xeroderma pigmentosum VII (XP7), a skin disorder characterized by hypersensitivity to UV light and increased susceptibility for skin cancer development following UV exposure. Some patients also develop Cockayne syndrome, which is characterized by severe growth defects, cognitive disability, and cachexia. Read-through transcription exists between this gene and the neighboring upstream BIVM (basic, immunoglobulin-like variable motif containing) gene. [provided by RefSeq, Feb 2011]

ERCC5 links:

BIVM-ERCC5 (HGNC:43690): (BIVM-ERCC5 readthrough) This locus represents naturally occurring read-through transcription between the neighboring BIVM (basic, immunoglobulin-like variable motif containing) and ERCC5 (excision repair cross-complementing rodent repair deficiency, complementation group 5) genes on chromosome 13. The read-through transcript encodes a fusion protein that shares sequence identity with the products of each individual gene. [provided by RefSeq, Feb 2011]

BIVM-ERCC5 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.878

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ERCC5	NM_000123.4 link	c.2620G>A	p.Ala874Thr	missense_variant	Exon 12 of 15	ENST00000652225.2	NP_000114.3	P28715-1
BIVM-ERCC5	NM_001204425.2 link	c.3982G>A	p.Ala1328Thr	missense_variant	Exon 20 of 23		NP_001191354.2	R4GMW8Q59FZ7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ERCC5	ENST00000652225.2 link	c.2620G>A	p.Ala874Thr	missense_variant	Exon 12 of 15		NM_000123.4	ENSP00000498881.2	P28715-1
BIVM-ERCC5	ENST00000639435.1 link	c.3982G>A	p.Ala1328Thr	missense_variant	Exon 22 of 25	5		ENSP00000491742.1	R4GMW8
BIVM-ERCC5	ENST00000639132.1 link	c.3295G>A	p.Ala1099Thr	missense_variant	Exon 21 of 24	5		ENSP00000492684.1	A0A1W2PS85

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251456

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135910

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000376

AC:

AN:

1461868

Hom.:

Cov.:

AF XY:

0.0000426

AC XY:

AN XY:

727234

show subpopulations

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:

0.000185

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000324

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000820

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Xeroderma pigmentosum, group G

Pathogenic:1Uncertain:1

Pathogenic, no assertion criteria provided	literature only	OMIM	Jun 01, 2002	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	The ERCC5 c.2620G>A (p.Ala874Thr) missense variant has been reported in a single study in which it was found in a compound heterozygous state with a stop-gained variant in one patient with a mild phenotype belonging to the xeroderma pigmentosum (XP) complementation group G (Emmert et al. 2002). The p.Ala874Thr variant was absent from 104 controls (Emmert et al. 2002) and is reported at a frequency of 0.00002 in the total population of the Exome Aggregation Consortium. Functional studies of the variant in patient fibroblasts showed a marked reduction in post-UV cell survival and DNA repair compared to wild type cells but nearly normal levels of mRNA expression. The variant protein was also shown to have residual ability to complement XP group G cells, consistent with the mild phenotype (Emmert et al. 2002). The p.Ala874Thr variant is located in the highly conserved I-region that is thought to be part of the active site of the enzyme. Based on the evidence, the p.Ala874Thr variant is considered to be of unknown significance but suspicious for pathogenicity for xeroderma pigmentosum. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

Feb 23, 2022

Variant summary: ERCC5 c.2620G>A (p.Ala874Thr) results in a non-conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 2.4e-05 in 251456 control chromosomes (gnomAD). c.2620G>A has been reported in the literature in a compound heterozygous individual who carried a truncating variant in trans, and was affected with a milder phenotype (i.e. sun sensitivity but no neurological abnormalities) of Xeroderma Pigmentosum (Emmert_2002). These data do not allow clear conclusions about variant significance. However, publications also reported experimental evidence evaluating an impact on protein function, and demonstrated markedly decreased but significant residual activity for the variant protein (Emmert_2002, Tsutakawa_2020), which is consistent with the milder phenotype. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014, and classified the variant as uncertain significance (but suspicious for pathogenicity). Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 02, 2022

The c.2620G>A (p.A874T) alteration is located in exon 12 (coding exon 12) of the ERCC5 gene. This alteration results from a G to A substitution at nucleotide position 2620, causing the alanine (A) at amino acid position 874 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.89

BayesDel_addAF

Pathogenic

0.32

BayesDel_noAF

Pathogenic

0.41

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.74

.;.;.;D;.

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.83

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.97

D;D;.;D;D

M_CAP

Uncertain

0.18

MetaRNN

Pathogenic

0.88

D;D;D;D;D

MetaSVM

Pathogenic

0.80

MutationAssessor

Pathogenic

3.4

.;.;.;M;.

PROVEAN

Uncertain

-3.2

.;.;.;D;D

REVEL

Pathogenic

0.86

Sift

Uncertain

0.0020

.;.;.;D;D

Sift4G

Uncertain

0.014

.;.;.;D;D

Polyphen

1.0

.;.;.;D;.

Vest4

0.62, 0.60

MVP

0.92

MPC

0.54

ClinPred

0.90

GERP RS

5.0

Varity_R

0.73

gMVP

0.71

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