4-109913406-A-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001963.6(EGF):c.71A>T(p.Gln24Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,686 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

EGF
NM_001963.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.215

Publications

3 publications found

Variant links:

Genes affected

EGF (HGNC:3229): (epidermal growth factor) This gene encodes a member of the epidermal growth factor superfamily. The encoded preproprotein is proteolytically processed to generate the 53-amino acid epidermal growth factor peptide. This protein acts a potent mitogenic factor that plays an important role in the growth, proliferation and differentiation of numerous cell types. This protein acts by binding with high affinity to the cell surface receptor, epidermal growth factor receptor. Defects in this gene are the cause of hypomagnesemia type 4. Dysregulation of this gene has been associated with the growth and progression of certain cancers. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed. [provided by RefSeq, Jan 2016]

EGF Gene-Disease associations (from GenCC):

familial primary hypomagnesemia with normocalciuria and normocalcemia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
renal hypomagnesemia 4
Inheritance: AD, Unknown Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

EGF links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.19640186).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EGF	NM_001963.6 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 24	ENST00000265171.10	NP_001954.2	P01133-1
EGF	NM_001178130.3 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 23		NP_001171601.1	P01133-3
EGF	NM_001178131.3 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 23		NP_001171602.1	P01133-2
EGF	NM_001357021.2 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 20		NP_001343950.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
EGF	ENST00000265171.10 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 24	1	NM_001963.6	ENSP00000265171.5	P01133-1
EGF	ENST00000503392.1 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 23	1		ENSP00000421384.1	P01133-3
EGF	ENST00000509793.5 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 23	2		ENSP00000424316.1	P01133-2
EGF	ENST00000652245.1 link	c.71A>T	p.Gln24Leu	missense_variant	Exon 1 of 20			ENSP00000498337.1	A0A494C018

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000120

AC:

AN:

250638

AF XY:

0.0000148

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461686

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727148

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44680

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111900

Other (OTH)

AF:

0.00

AC:

AN:

60376

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.029673), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.400

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 11, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.71A>T (p.Q24L) alteration is located in exon 1 (coding exon 1) of the EGF gene. This alteration results from a A to T substitution at nucleotide position 71, causing the glutamine (Q) at amino acid position 24 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.19

CADD

Benign

5.1

(source)

DANN

Benign

0.94

DEOGEN2

Uncertain

0.69

.;D;.

Eigen

Benign

-0.85

Eigen_PC

Benign

-0.98

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.71

T;T;T

M_CAP

Uncertain

0.093

MetaRNN

Benign

0.20

T;T;T

MetaSVM

Benign

-0.51

MutationAssessor

Uncertain

2.0

M;M;M

PhyloP100

0.21

PrimateAI

Benign

0.23

PROVEAN

Uncertain

-3.3

D;D;D

REVEL

Uncertain

0.34

Sift

Uncertain

0.010

D;D;D

Sift4G

Uncertain

0.0070

D;D;D

Polyphen

0.47

P;B;.

Vest4

0.18

MutPred

0.60

Loss of disorder (P = 0.1009);Loss of disorder (P = 0.1009);Loss of disorder (P = 0.1009);

MVP

0.85

MPC

0.29

ClinPred

0.11

GERP RS

-2.2

PromoterAI

0.0074

Neutral

(source)

Varity_R

0.16

gMVP

0.53

Mutation Taster

=93/7

polymorphism

(source)

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

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4-109913406-A-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over