16-13920169-G-C

Variant names:

• chr16-13920169-G-C
• rs373789508
• NM_005236.3:c.4G>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_005236.3(ERCC4):​c.4G>C​(p.Glu2Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: ERCC4 NM_005236.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.52
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• xeroderma pigmentosum group F

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, G2P, ClinGen
• Fanconi anemia complementation group Q

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• XFE progeroid syndrome

  Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics
• Fanconi anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• xeroderma pigmentosum

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• xeroderma pigmentosum-Cockayne syndrome complex

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LOC105371093 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33026922).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ERCC4	NM_005236.3	c.4G>C	p.Glu2Gln	missense_variant	Exon 1 of 11	ENST00000311895.8	NP_005227.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ERCC4	ENST00000311895.8	c.4G>C	p.Glu2Gln	missense_variant	Exon 1 of 11	1	NM_005236.3	ENSP00000310520.7

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cockayne syndrome;C0268140:Xeroderma pigmentosum, group F;C3808988:Fanconi anemia complementation group Q Uncertain:1

Jul 23, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with ERCC4-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces glutamic acid with glutamine at codon 2 of the ERCC4 protein (p.Glu2Gln). The glutamic acid residue is moderately conserved and there is a small physicochemical difference between glutamic acid and glutamine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Uncertain	0.073	D
BayesDel_noAF	Benign	-0.13
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.10	.;T
Eigen	Benign	-0.075
Eigen_PC	Benign	0.049
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.27	T;T
M_CAP	Benign	0.036	D
MetaRNN	Benign	0.33	T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.69	N;N
PhyloP100		3.5
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-0.43	.;N
REVEL	Benign	0.10
Sift	Uncertain	0.019	.;D
Sift4G	Benign	0.11	T;D
Polyphen		0.58	.;P
Vest4		0.35
MutPred		0.14		Gain of MoRF binding (P = 0.015);Gain of MoRF binding (P = 0.015);
MVP		0.88
MPC		0.077
ClinPred		0.91	D
GERP RS		5.1
PromoterAI		0.085	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.22
gMVP		0.49

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: rs373789508; hg19: chr16-14014026;