chr4-109912889-G-A

Position:

• chr4-109912889-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_001963.6(EGF):​c.-447G>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 0.000776 in 179,086 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 Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.00081 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00056 (0 hom.)
• Consequence: EGF NM_001963.6 5_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 3.31

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 Likely_benign. Variant got -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.57).
• BP6: Variant 4-109912889-G-A is Benign according to our data. Variant chr4-109912889-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 347218.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EGF	NM_001963.6	c.-447G>A		5_prime_UTR_variant	1/24	ENST00000265171.10
EGF	NM_001178130.3	c.-447G>A		5_prime_UTR_variant	1/23
EGF	NM_001178131.3	c.-447G>A		5_prime_UTR_variant	1/23
EGF	NM_001357021.2	c.-447G>A		5_prime_UTR_variant	1/20

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EGF	ENST00000265171.10	c.-447G>A		5_prime_UTR_variant	1/24	1	NM_001963.6	P1
EGF	ENST00000509793.5	c.-447G>A		5_prime_UTR_variant	1/23	2
EGF	ENST00000652245.1	c.-447G>A		5_prime_UTR_variant	1/20

Frequencies

GnomAD3 genomes AF: 0.000821 AC: 125 AN: 152202 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000796

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00295

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000603

Gnomad OTH AF: 0.00143

GnomAD4 exome AF: 0.000560 AC: 15 AN: 26766 Hom.: 0 Cov.: 0 AF XY: 0.000444 AC XY: 6 AN XY: 13510

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00204

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000436

Gnomad4 OTH exome AF: 0.00139

GnomAD4 genome AF: 0.000814 AC: 124 AN: 152320 Hom.: 0 Cov.: 33 AF XY: 0.000846 AC XY: 63 AN XY: 74482

Gnomad4 AFR AF: 0.000770

Gnomad4 AMR AF: 0.00294

Gnomad4 ASJ AF: 0.000288

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000603

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.000971 Hom.: 0

Bravo AF: 0.00121

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Renal hypomagnesemia 4 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.57
CADD	Benign	16
DANN	Benign	0.88

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs56399752; hg19: chr4-110834045;