7-55181336-G-C

Variant names:

• chr7-55181336-G-C
• rs483352806
• NM_005228.5:c.2327G>C

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_005228.5(EGFR):​c.2327G>C​(p.Arg776Pro) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R776H) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 34)
• Consequence: EGFR NM_005228.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.96
• Publications: 0 publications found

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]

EGFR-AS1 (HGNC:40207): (EGFR antisense RNA 1)

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 3 benign, 24 uncertain in NM_005228.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-55181336-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 126515.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.95

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EGFR	NM_005228.5	c.2327G>C	p.Arg776Pro	missense_variant	Exon 20 of 28	ENST00000275493.7	NP_005219.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EGFR	ENST00000275493.7	c.2327G>C	p.Arg776Pro	missense_variant	Exon 20 of 28	1	NM_005228.5	ENSP00000275493.2

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.26
CADD	Pathogenic	34
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.72	D;D;D
Eigen	Uncertain	0.65
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.97	D;D;D
M_CAP	Pathogenic	0.30	D
MetaRNN	Pathogenic	0.95	D;D;D
MetaSVM	Benign	-0.39	T
MutationAssessor	Benign	1.1	.;.;L
PhyloP100		10
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-6.2	D;.;D
REVEL	Pathogenic	0.65
Sift	Pathogenic	0.0	D;.;D
Sift4G	Uncertain	0.0020	D;D;D
Polyphen		0.98	D;.;D
Vest4		0.98
MutPred		0.81		.;.;Loss of sheet (P = 0.1501);
MVP		0.94
MPC		1.8
ClinPred		1.0	D
GERP RS		5.0
Varity_R		0.98
gMVP		0.92
Mutation Taster		=9/91	disease causing

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: rs483352806; hg19: chr7-55249029;