chr7-100803498-G-A

Position:

• chr7-100803498-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004444.5(EPHB4):​c.2927C>T​(p.Thr976Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000698 in 1,433,640 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: EPHB4 NM_004444.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.28

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]

EPHB4 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07007587).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EPHB4	NM_004444.5	c.2927C>T	p.Thr976Ile	missense_variant	17/17	ENST00000358173.8	NP_004435.3
EPHB4	XM_017011816.2	c.2981C>T	p.Thr994Ile	missense_variant	17/17		XP_016867305.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EPHB4	ENST00000358173.8	c.2927C>T	p.Thr976Ile	missense_variant	17/17	1	NM_004444.5	ENSP00000350896.3
EPHB4	ENST00000360620.7	c.2771C>T	p.Thr924Ile	missense_variant	16/16	1		ENSP00000353833.3
EPHB4	ENST00000487222.5	n.4128C>T		non_coding_transcript_exon_variant	16/16	1
EPHB4	ENST00000616502	c.*1392C>T		3_prime_UTR_variant	14/14	5		ENSP00000482702.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.98e-7 AC: 1 AN: 1433640 Hom.: 0 Cov.: 30 AF XY: 0.00000141 AC XY: 1 AN XY: 709544

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.0000394

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

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

Oct 24, 2024

The p.T976I variant (also known as c.2927C>T), located in coding exon 17 of the EPHB4 gene, results from a C to T substitution at nucleotide position 2927. The threonine at codon 976 is replaced by isoleucine, 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. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.078
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	19
DANN	Benign	0.92
DEOGEN2	Benign	0.068	.;T
Eigen	Benign	-0.69
Eigen_PC	Benign	-0.55
FATHMM_MKL	Benign	0.40	N
LIST_S2	Benign	0.35	T;T
M_CAP	Benign	0.035	D
MetaRNN	Benign	0.070	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.3	.;L
PrimateAI	Benign	0.30	T
PROVEAN	Benign	0.38	N;N
REVEL	Benign	0.15
Sift	Benign	0.049	D;T
Sift4G	Benign	0.12	T;T
Polyphen		0.0	B;B
Vest4		0.16
MutPred		0.21		.;Loss of phosphorylation at T976 (P = 0.0061);
MVP		0.24
MPC		0.51
ClinPred		0.13	T
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.099
gMVP		0.36

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: chr7-100401120;