chr7-55019285-C-T

Position:

• chr7-55019285-C-T

Variant summary

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

The NM_005228.5(EGFR):​c.8C>T​(p.Pro3Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000222 in 1,353,762 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. P3A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000022 (0 hom.)
• Consequence: EGFR NM_005228.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0290

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=0.24487603).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EGFR	NM_005228.5	c.8C>T	p.Pro3Leu	missense_variant	1/28	ENST00000275493.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EGFR	ENST00000275493.7	c.8C>T	p.Pro3Leu	missense_variant	1/28	1	NM_005228.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000632 AC: 1 AN: 158216 Hom.: 0 AF XY: 0.0000113 AC XY: 1 AN XY: 88842

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.0000148

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000222 AC: 3 AN: 1353762 Hom.: 0 Cov.: 30 AF XY: 0.00000149 AC XY: 1 AN XY: 671188

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000285

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ExAC AF: 0.0000169 AC: 2

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

Jul 28, 2023

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 proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 3 of the EGFR protein (p.Pro3Leu). This variant has not been reported in the literature in individuals affected with EGFR-related conditions. ClinVar contains an entry for this variant (Variation ID: 1017706). 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 leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	17
DANN	Uncertain	1.0
DEOGEN2	Benign	0.26	T;.;T;.;.;T
Eigen	Benign	-0.75
Eigen_PC	Benign	-0.72
FATHMM_MKL	Benign	0.067	N
LIST_S2	Benign	0.82	T;T;T;T;T;T
M_CAP	Pathogenic	0.96	D
MetaRNN	Benign	0.24	T;T;T;T;T;T
MetaSVM	Benign	-0.77	T
MutationAssessor	Benign	0.34	.;N;.;N;N;N
MutationTaster	Benign	1.0	N;N;N;N;N;N
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-0.61	N;N;.;N;N;N
REVEL	Benign	0.17
Sift	Uncertain	0.0060	D;D;.;D;D;D
Sift4G	Benign	0.085	T;T;T;D;T;T
Polyphen		0.0010	B;B;.;B;B;B
Vest4		0.15
MutPred		0.27		Gain of MoRF binding (P = 0.0554);Gain of MoRF binding (P = 0.0554);Gain of MoRF binding (P = 0.0554);Gain of MoRF binding (P = 0.0554);Gain of MoRF binding (P = 0.0554);Gain of MoRF binding (P = 0.0554);
MVP		0.73
MPC		0.56
ClinPred		0.13	T
GERP RS		1.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.038
gMVP		0.47

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: rs749433287; hg19: chr7-55086978;