rs483352808

Positions:

• chr7-55191720-G-A
• chr7-55191720-G-C
• chr7-55191720-G-T

Variant summary

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

The NM_005228.5(EGFR):​c.2471G>A​(p.Gly824Asp) variant causes a missense, splice region 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. 14/23 in silico tools predict a damaging outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as drug response (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: EGFR NM_005228.5 missense, splice_region
• Scores: Splicing: ADA: 0.9913
• Clinical Significance: drug response no assertion criteria provided O:1
• Conservation: PhyloP100: 9.96

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 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 12 uncertain in NM_005228.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EGFR	NM_005228.5	c.2471G>A	p.Gly824Asp	missense_variant, splice_region_variant	21/28	ENST00000275493.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EGFR	ENST00000275493.7	c.2471G>A	p.Gly824Asp	missense_variant, splice_region_variant	21/28	1	NM_005228.5	P1
EGFR	ENST00000455089.5	c.2336G>A	p.Gly779Asp	missense_variant, splice_region_variant	20/26	1
EGFR	ENST00000450046.2	c.2312G>A	p.Gly771Asp	missense_variant, splice_region_variant	21/28	4
EGFR	ENST00000700145.1	c.821G>A	p.Gly274Asp	missense_variant, splice_region_variant	8/9

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: drug response

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Squamous cell carcinoma of the head and neck Other:1

drug response, no assertion criteria provided

literature only

Genetics, Bhagwan Mahavir Medical Research Centre

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.36
CADD	Pathogenic	34
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	D;D;D
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;D;D
M_CAP	Pathogenic	0.49	D
MetaRNN	Pathogenic	0.97	D;D;D
MetaSVM	Uncertain	0.76	D
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-6.3	D;.;D
REVEL	Pathogenic	0.91
Sift	Uncertain	0.0010	D;.;D
Sift4G	Uncertain	0.0040	D;D;D
Polyphen		1.0	D;.;D
Vest4		0.93
MutPred		0.85		.;.;Loss of ubiquitination at K823 (P = 0.1778);
MVP		0.91
MPC		1.7
ClinPred		1.0	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.99
gMVP		0.99

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Pathogenic	0.89
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: rs483352808; hg19: chr7-55259413;