chr7-55156802-G-C

Variant names:

• chr7-55156802-G-C
• rs587778246
• NM_005228.5:c.1177G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005228.5(EGFR):​c.1177G>C​(p.Asp393His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. D393A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: EGFR NM_005228.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3 O:1
• Conservation: PhyloP100: 2.53
• Publications: 2 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 Gene-Disease associations (from GenCC):

• lung cancer

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P, Ambry Genetics
• non-small cell lung carcinoma

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• inflammatory skin and bowel disease, neonatal, 2

  Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• neonatal inflammatory skin and bowel disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005228.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EGFR	NM_005228.5	MANE Select	c.1177G>C	p.Asp393His	missense	Exon 10 of 28	NP_005219.2
	EGFR	NM_001346899.2		c.1042G>C	p.Asp348His	missense	Exon 9 of 27	NP_001333828.1
	EGFR	NM_001346900.2		c.1018G>C	p.Asp340His	missense	Exon 10 of 28	NP_001333829.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EGFR	ENST00000275493.7	TSL:1 MANE Select	c.1177G>C	p.Asp393His	missense	Exon 10 of 28	ENSP00000275493.2
	EGFR	ENST00000455089.5	TSL:1	c.1042G>C	p.Asp348His	missense	Exon 9 of 26	ENSP00000415559.1
	EGFR	ENST00000344576.7	TSL:1	c.1177G>C	p.Asp393His	missense	Exon 10 of 16	ENSP00000345973.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000795 AC: 2 AN: 251486 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 0.00000205 AC: 3 AN: 1461894 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727248

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000671 AC: 3 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:2

Dec 16, 2021

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

Aug 04, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.D393H variant (also known as c.1177G>C), located in coding exon 10 of the EGFR gene, results from a G to C substitution at nucleotide position 1177. The aspartic acid at codon 393 is replaced by histidine, an amino acid with similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear.

EGFR-related lung cancer Uncertain:1

Dec 16, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces aspartic acid, which is acidic and polar, with histidine, which is basic and polar, at codon 393 of the EGFR protein (p.Asp393His). This variant is present in population databases (rs587778246, gnomAD 0.006%). 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: 134018). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt EGFR protein function with a negative predictive value of 80%. 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.

not specified Other:1

Sep 19, 2013

ITMI

Significance: not provided

Review Status: no classification provided

Collection Method: reference population

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.34
BayesDel_addAF	Benign	-0.013	T
BayesDel_noAF	Uncertain	-0.080
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.58	D
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.86	D
M_CAP	Uncertain	0.092	D
MetaRNN	Uncertain	0.53	D
MetaSVM	Uncertain	-0.17	T
MutationAssessor	Uncertain	2.0	M
PhyloP100		2.5
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.39
Sift	Uncertain	0.019	D
Sift4G	Uncertain	0.032	D
Polyphen		0.96	D
Vest4		0.30
MutPred		0.50		Gain of methylation at K396 (P = 0.0637)
MVP		0.85
MPC		1.3
ClinPred		0.83	D
GERP RS		5.0
Varity_R		0.35
gMVP		0.83
Mutation Taster		=61/39	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs587778246; hg19: chr7-55224495;