7-100803548-C-A

Position:

• chr7-100803548-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The ENST00000358173.8(EPHB4):​c.2877G>T​(p.Lys959Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000207 in 1,452,542 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: 0.0000021 (0 hom.)
• Consequence: EPHB4 ENST00000358173.8 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.27

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 Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.40065098).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EPHB4	NM_004444.5	c.2877G>T	p.Lys959Asn	missense_variant	17/17	ENST00000358173.8	NP_004435.3
EPHB4	XM_017011816.2	c.2931G>T	p.Lys977Asn	missense_variant	17/17		XP_016867305.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EPHB4	ENST00000358173.8	c.2877G>T	p.Lys959Asn	missense_variant	17/17	1	NM_004444.5	ENSP00000350896	P1
EPHB4	ENST00000360620.7	c.2721G>T	p.Lys907Asn	missense_variant	16/16	1		ENSP00000353833
EPHB4	ENST00000487222.5	n.4078G>T		non_coding_transcript_exon_variant	16/16	1
EPHB4	ENST00000616502.4	c.*1342G>T		3_prime_UTR_variant	14/14	5		ENSP00000482702

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1452542 Hom.: 0 Cov.: 30 AF XY: 0.00000277 AC XY: 2 AN XY: 721124

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00000271

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cardiovascular phenotype Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 01, 2024

The p.K959N variant (also known as c.2877G>T), located in coding exon 17 of the EPHB4 gene, results from a G to T substitution at nucleotide position 2877. The lysine at codon 959 is replaced by asparagine, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.35	.;T
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Benign	0.047	D
MetaRNN	Benign	0.40	T;T
MetaSVM	Benign	-0.62	T
MutationAssessor	Uncertain	2.5	.;M
MutationTaster	Benign	0.99	D;D
PrimateAI	Uncertain	0.78	T
PROVEAN	Uncertain	-3.0	D;D
REVEL	Uncertain	0.30
Sift	Benign	0.081	T;T
Sift4G	Uncertain	0.033	D;T
Polyphen		1.0	D;D
Vest4		0.13
MutPred		0.59		.;Loss of methylation at K959 (P = 0.0116);
MVP		0.68
MPC		1.4
ClinPred		0.99	D
GERP RS		1.7
Varity_R		0.72
gMVP		0.66

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr7-100401170;