chr7-55019299-G-A

Position:

• chr7-55019299-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005228.5(EGFR):​c.22G>A​(p.Gly8Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000367 in 1,361,190 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G8E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000037 (0 hom.)
• Consequence: EGFR NM_005228.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.702

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21046865).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EGFR	NM_005228.5	c.22G>A	p.Gly8Arg	missense_variant	1/28	ENST00000275493.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EGFR	ENST00000275493.7	c.22G>A	p.Gly8Arg	missense_variant	1/28	1	NM_005228.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000182 AC: 3 AN: 164976 Hom.: 0 AF XY: 0.0000216 AC XY: 2 AN XY: 92740

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000115

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

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: 0.00000367 AC: 5 AN: 1361190 Hom.: 0 Cov.: 30 AF XY: 0.00000296 AC XY: 2 AN XY: 675344

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000137

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ExAC AF: 0.00000847 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

EGFR-related lung cancer Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 23, 2023

This variant has not been reported in the literature in individuals affected with EGFR-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 8 of the EGFR protein (p.Gly8Arg). ClinVar contains an entry for this variant (Variation ID: 858314). 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 output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.45
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	14
DANN	Benign	0.87
DEOGEN2	Benign	0.22	T;.;T;.;.;T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.037	N
LIST_S2	Benign	0.73	T;T;T;T;T;T
M_CAP	Pathogenic	0.94	D
MetaRNN	Benign	0.21	T;T;T;T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.77	.;N;.;N;N;N
MutationTaster	Benign	1.0	N;N;N;N;N;N
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	0.30	N;N;.;N;N;N
REVEL	Benign	0.10
Sift	Benign	0.21	T;T;.;T;T;T
Sift4G	Benign	0.47	T;T;T;T;T;T
Polyphen		0.0020	B;B;.;B;B;B
Vest4		0.29
MutPred		0.36		Gain of methylation at G8 (P = 0.0042);Gain of methylation at G8 (P = 0.0042);Gain of methylation at G8 (P = 0.0042);Gain of methylation at G8 (P = 0.0042);Gain of methylation at G8 (P = 0.0042);Gain of methylation at G8 (P = 0.0042);
MVP		0.70
MPC		0.63
ClinPred		0.032	T
GERP RS		-0.14
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.050
gMVP		0.54

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: rs754259847; hg19: chr7-55086992;