7-55174807-A-G

Position:

• chr7-55174807-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP6

The NM_005228.5(EGFR):​c.2270A>G​(p.Lys757Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,461,622 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000062 (0 hom.)
• Consequence: EGFR NM_005228.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 9.22

Genes affected

EGFR (HGNC:3236): (epidermal growth factor receptor) The protein encoded by this gene is a transmembrane glycoprotein that is a member of the protein kinase superfamily. This protein is a receptor for members of the epidermal growth factor family. EGFR is a cell surface protein that binds to epidermal growth factor, thus inducing receptor dimerization and tyrosine autophosphorylation leading to cell proliferation. Mutations in this gene are associated with lung cancer. EGFR is a component of the cytokine storm which contributes to a severe form of Coronavirus Disease 2019 (COVID-19) resulting from infection with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). [provided by RefSeq, Jul 2020]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP6: Variant 7-55174807-A-G is Benign according to our data. Variant chr7-55174807-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 560009.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EGFR	NM_005228.5	c.2270A>G	p.Lys757Arg	missense_variant	19/28	ENST00000275493.7	NP_005219.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EGFR	ENST00000275493.7	c.2270A>G	p.Lys757Arg	missense_variant	19/28	1	NM_005228.5	ENSP00000275493.2
EGFR	ENST00000455089.5	c.2135A>G	p.Lys712Arg	missense_variant	18/26	1		ENSP00000415559.1
EGFR	ENST00000450046.2	c.2111A>G	p.Lys704Arg	missense_variant	19/28	4		ENSP00000413354.2
EGFR	ENST00000700145.1	c.617A>G	p.Lys206Arg	missense_variant	6/9			ENSP00000514824.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000239 AC: 6 AN: 251482 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135920

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000326

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000616 AC: 9 AN: 1461622 Hom.: 0 Cov.: 31 AF XY: 0.00000688 AC XY: 5 AN XY: 727140

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000202

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Lung adenocarcinoma Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

3DMed Clinical Laboratory Inc

Mar 30, 2018

- -

EGFR-related lung cancer Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 26, 2023

This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 757 of the EGFR protein (p.Lys757Arg). This variant is present in population databases (rs397517102, gnomAD 0.03%). This missense change has been observed in individual(s) with lung cancer (PMID: 30610926). ClinVar contains an entry for this variant (Variation ID: 560009). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt EGFR protein function with a negative predictive value of 80%. 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. -

Hereditary cancer-predisposing syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 23, 2024

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.094
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.090
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T;T;D
Eigen	Benign	0.18
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.91	D;D;D
M_CAP	Uncertain	0.088	D
MetaRNN	Uncertain	0.51	D;D;D
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	0.97	.;.;L
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-1.6	N;.;N
REVEL	Uncertain	0.46
Sift	Benign	0.10	T;.;T
Sift4G	Uncertain	0.058	T;T;T
Polyphen		0.052	B;.;D
Vest4		0.69
MutPred		0.43		.;.;Loss of ubiquitination at K757 (P = 0.0174);
MVP		0.84
MPC		1.3
ClinPred		0.30	T
GERP RS		5.5
Varity_R		0.63
gMVP		0.42

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

Other links and lift over

dbSNP: rs397517102; hg19: chr7-55242500; COSMIC: COSV51841095; COSMIC: COSV51841095;