chr7-100803476-C-T

Position:

• chr7-100803476-C-T

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 0P and 15B. BP4_Strong BP6_Moderate BP7 BS1 BS2

The ENST00000358173.8(EPHB4):​c.2949G>A​(p.Pro983=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000194 in 1,575,378 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. P983P) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.00017 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00020 (2 hom.)
• Consequence: EPHB4 ENST00000358173.8 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.555

Genes affected

EPHB4 (HGNC:3395): (EPH receptor B4) Ephrin receptors and their ligands, the ephrins, mediate numerous developmental processes, particularly in the nervous system. Based on their structures and sequence relationships, ephrins are divided into the ephrin-A (EFNA) class, which are anchored to the membrane by a glycosylphosphatidylinositol linkage, and the ephrin-B (EFNB) class, which are transmembrane proteins. The Eph family of receptors are divided into 2 groups based on the similarity of their extracellular domain sequences and their affinities for binding ephrin-A and ephrin-B ligands. Ephrin receptors make up the largest subgroup of the receptor tyrosine kinase (RTK) family. The protein encoded by this gene binds to ephrin-B2 and plays an essential role in vascular development. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -15 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 7-100803476-C-T is Benign according to our data. Variant chr7-100803476-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 1798004.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=0.555 with no splicing effect.
• BS1: Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000171 (26/152298) while in subpopulation EAS AF= 0.00444 (23/5178). AF 95% confidence interval is 0.00304. There are 0 homozygotes in gnomad4. There are 15 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 26 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EPHB4	NM_004444.5	c.2949G>A	p.Pro983=	synonymous_variant	17/17	ENST00000358173.8	NP_004435.3
EPHB4	XM_017011816.2	c.3003G>A	p.Pro1001=	synonymous_variant	17/17		XP_016867305.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EPHB4	ENST00000358173.8	c.2949G>A	p.Pro983=	synonymous_variant	17/17	1	NM_004444.5	ENSP00000350896	P1
EPHB4	ENST00000360620.7	c.2793G>A	p.Pro931=	synonymous_variant	16/16	1		ENSP00000353833
EPHB4	ENST00000487222.5	n.4150G>A		non_coding_transcript_exon_variant	16/16	1
EPHB4	ENST00000616502.4	c.*1414G>A		3_prime_UTR_variant	14/14	5		ENSP00000482702

Frequencies

GnomAD3 genomes AF: 0.000177 AC: 27 AN: 152180 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00462

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.000956

GnomAD3 exomes AF: 0.000532 AC: 108 AN: 203110 Hom.: 0 AF XY: 0.000506 AC XY: 55 AN XY: 108778

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000356

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00671

Gnomad SAS exome AF: 0.0000392

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000113

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000197 AC: 280 AN: 1423080 Hom.: 2 Cov.: 30 AF XY: 0.000195 AC XY: 137 AN XY: 702580

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000255

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00610

Gnomad4 SAS exome AF: 0.0000123

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000376

Gnomad4 OTH exome AF: 0.0000340

GnomAD4 genome AF: 0.000171 AC: 26 AN: 152298 Hom.: 0 Cov.: 32 AF XY: 0.000201 AC XY: 15 AN XY: 74476

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00444

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.000946

Bravo AF: 0.000234

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 20, 2019

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	5.2
DANN	Benign	0.69
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs112803997; hg19: chr7-100401098; COSMIC: COSV62268821; COSMIC: COSV62268821;