Genetic Variant ERCC4:p.Arg87Leu (chr16-13922083-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005236.3(ERCC4):c.260G>T(p.Arg87Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,496 control chromosomes in the GnomAD database, with no homozygous occurrence. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R87H) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

ERCC4
NM_005236.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.32

Publications

0 publications found

Variant links:

Genes affected

ERCC4 (HGNC:3436): (ERCC excision repair 4, endonuclease catalytic subunit) The protein encoded by this gene forms a complex with ERCC1 and is involved in the 5' incision made during nucleotide excision repair. This complex is a structure specific DNA repair endonuclease that interacts with EME1. Defects in this gene are a cause of xeroderma pigmentosum complementation group F (XP-F), or xeroderma pigmentosum VI (XP6).[provided by RefSeq, Mar 2009]

ERCC4 links:

LOC105371093 (HGNC:):

LOC105371093 links:

RPS26P52 (HGNC:36863): (ribosomal protein S26 pseudogene 52)

RPS26P52 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
ERCC4	NM_005236.3 link	c.260G>T	p.Arg87Leu	missense_variant	Exon 2 of 11	ENST00000311895.8	NP_005227.1
ERCC4	XM_011522424.4 link	c.260G>T	p.Arg87Leu	missense_variant	Exon 2 of 12		XP_011520726.1
LOC105371093	XR_007064999.1 link	n.82+4442C>A		intron_variant	Intron 1 of 2
LOC105371093	XR_007065000.1 link	n.82+4442C>A		intron_variant	Intron 1 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ERCC4	ENST00000311895.8 link	c.260G>T	p.Arg87Leu	missense_variant	Exon 2 of 11	1	NM_005236.3	ENSP00000310520.7

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461496

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727068

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33466

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39680

South Asian (SAS)

AF:

0.00

AC:

AN:

86234

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111728

Other (OTH)

AF:

0.00

AC:

AN:

60366

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.051

BayesDel_noAF

Benign

-0.31

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.10

.;T

Eigen

Benign

-0.23

Eigen_PC

Benign

-0.029

FATHMM_MKL

Uncertain

0.81

LIST_S2

Uncertain

0.90

D;D

M_CAP

Benign

0.015

MetaRNN

Uncertain

0.57

D;D

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.61

N;N

PhyloP100

5.3

PrimateAI

Benign

0.42

PROVEAN

Benign

0.90

.;N

REVEL

Benign

0.099

Sift

Benign

0.42

.;T

Sift4G

Benign

0.54

T;T

Polyphen

0.031

.;B

Vest4

0.69

MutPred

0.52

Loss of disorder (P = 0.0365);Loss of disorder (P = 0.0365);

MVP

0.76

MPC

0.11

ClinPred

0.67

GERP RS

4.4

Varity_R

0.16

gMVP

0.70

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over