chr7-55174785-G-C

Position:

• chr7-55174785-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_005228.5(EGFR):​c.2248G>C​(p.Ala750Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A750V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: EGFR NM_005228.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity no assertion criteria provided P:2 U:1
• Conservation: PhyloP100: 8.02

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 5 ACMG points.

• PM1: In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 14 uncertain in NM_005228.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.799

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EGFR	NM_005228.5	c.2248G>C	p.Ala750Pro	missense_variant	19/28	ENST00000275493.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EGFR	ENST00000275493.7	c.2248G>C	p.Ala750Pro	missense_variant	19/28	1	NM_005228.5	P1
EGFR	ENST00000455089.5	c.2113G>C	p.Ala705Pro	missense_variant	18/26	1
EGFR	ENST00000450046.2	c.2089G>C	p.Ala697Pro	missense_variant	19/28	4
EGFR	ENST00000700145.1	c.598G>C	p.Ala200Pro	missense_variant	6/9

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2 Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

Lung adenocarcinoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

Jul 14, 2015

- -

Non-small cell lung carcinoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

Jul 14, 2015

- -

not specified Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 01, 2008

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.11
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.59	D;D;D
Eigen	Uncertain	0.66
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.80	D;D;D
MetaSVM	Uncertain	0.13	D
MutationAssessor	Benign	1.3	.;.;L
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-2.3	N;.;N
REVEL	Uncertain	0.62
Sift	Benign	0.25	T;.;T
Sift4G	Benign	0.20	T;T;T
Polyphen		0.99	D;.;D
Vest4		0.78
MutPred		0.48		.;.;Gain of glycosylation at A750 (P = 0.0317);
MVP		0.87
MPC		1.6
ClinPred		0.96	D
GERP RS		5.5
Varity_R		0.93
gMVP		0.75

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs121913229; hg19: chr7-55242478; COSMIC: COSV51830861; COSMIC: COSV51830861;