chr4-109912912-G-A

Position:

• chr4-109912912-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_001963.6(EGF):​c.-424G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00639 in 188,554 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0077 (14 hom., cov: 33)
  • Exomes 𝑓: 0.00069 (0 hom.)
• Consequence: EGF NM_001963.6 5_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.98

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]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP6: Variant 4-109912912-G-A is Benign according to our data. Variant chr4-109912912-G-A is described in ClinVar as [Benign]. Clinvar id is 901088.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00774 (1179/152288) while in subpopulation AFR AF= 0.0268 (1114/41548). AF 95% confidence interval is 0.0255. There are 14 homozygotes in gnomad4. There are 531 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 14 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EGF	NM_001963.6	c.-424G>A		5_prime_UTR_variant	1/24	ENST00000265171.10
EGF	NM_001178130.3	c.-424G>A		5_prime_UTR_variant	1/23
EGF	NM_001178131.3	c.-424G>A		5_prime_UTR_variant	1/23
EGF	NM_001357021.2	c.-424G>A		5_prime_UTR_variant	1/20

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EGF	ENST00000265171.10	c.-424G>A		5_prime_UTR_variant	1/24	1	NM_001963.6	P1
EGF	ENST00000509793.5	c.-424G>A		5_prime_UTR_variant	1/23	2
EGF	ENST00000652245.1	c.-424G>A		5_prime_UTR_variant	1/20

Frequencies

GnomAD3 genomes AF: 0.00774 AC: 1178 AN: 152170 Hom.: 14 Cov.: 33

Gnomad AFR AF: 0.0269

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00282

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000206

Gnomad OTH AF: 0.00383

GnomAD4 exome AF: 0.000689 AC: 25 AN: 36266 Hom.: 0 Cov.: 0 AF XY: 0.000760 AC XY: 14 AN XY: 18416

Gnomad4 AFR exome AF: 0.0168

Gnomad4 AMR exome AF: 0.00190

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000471

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000458

Gnomad4 OTH exome AF: 0.00202

GnomAD4 genome AF: 0.00774 AC: 1179 AN: 152288 Hom.: 14 Cov.: 33 AF XY: 0.00713 AC XY: 531 AN XY: 74460

Gnomad4 AFR AF: 0.0268

Gnomad4 AMR AF: 0.00281

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000206

Gnomad4 OTH AF: 0.00379

Alfa AF: 0.00360 Hom.: 0

Bravo AF: 0.00884

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Renal hypomagnesemia 4 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	1.9
DANN	Benign	0.68

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

LitVar

Other links and lift over

dbSNP: rs35397046; hg19: chr4-110834068;