3-135192680-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP3_Moderate BS2

The NM_004441.5(EPHB1):c.1987C>T(p.Arg663Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000409 in 1,614,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000046 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000040 (0 hom.)
• Consequence: EPHB1 NM_004441.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.55

Genes affected

EPHB1 (HGNC:3392): (EPH receptor B1) 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 is a receptor for ephrin-B family members. [provided by RefSeq, Jul 2008]

(HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.848
• BS2: High AC in GnomAd at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EPHB1	NM_004441.5	c.1987C>T	p.Arg663Trp	missense_variant	11/16	ENST00000398015.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EPHB1	ENST00000398015.8	c.1987C>T	p.Arg663Trp	missense_variant	11/16	1	NM_004441.5	P1
	ENST00000649588.1	n.329-34352G>A		intron_variant, non_coding_transcript_variant
EPHB1	ENST00000647596.1	c.1987C>T	p.Arg663Trp	missense_variant	11/16
EPHB1	ENST00000493838.1	c.670C>T	p.Arg224Trp	missense_variant	9/14	2

Frequencies

GnomAD3 genomes AF: 0.0000460 AC: 7 AN: 152128 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000943

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000359 AC: 9 AN: 250560 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135710

Gnomad AFR exome AF: 0.000126

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000462

Gnomad NFE exome AF: 0.0000353

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000404 AC: 59 AN: 1461876 Hom.: 0 Cov.: 31 AF XY: 0.0000330 AC XY: 24 AN XY: 727242

Gnomad4 AFR exome AF: 0.0000896

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.0000562

Gnomad4 NFE exome AF: 0.0000396

Gnomad4 OTH exome AF: 0.0000828

GnomAD4 genome AF: 0.0000460 AC: 7 AN: 152128 Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4 AN XY: 74310

Gnomad4 AFR AF: 0.000121

Gnomad4 AMR AF: 0.0000655

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000943

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000329 Hom.: 0

Bravo AF: 0.0000567

ExAC AF: 0.0000330 AC: 4

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 13, 2021

The c.1987C>T (p.R663W) alteration is located in exon 11 (coding exon 11) of the EPHB1 gene. This alteration results from a C to T substitution at nucleotide position 1987, causing the arginine (R) at amino acid position 663 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.75
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Pathogenic	0.31
Cadd	Pathogenic	32
Dann	Pathogenic	1.0
DEOGEN2	Uncertain	0.69	D;.;.
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.92	D;D;D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.85	D;D;D
MetaSVM	Uncertain	0.39	D
MutationAssessor	Uncertain	2.2	M;.;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-6.9	D;.;D
REVEL	Pathogenic	0.71
Sift	Pathogenic	0.0	D;.;D
Sift4G	Benign	0.099	T;.;T
Polyphen		1.0	D;.;.
Vest4		0.85
MVP		0.96
MPC		1.3
ClinPred		0.72	D
GERP RS		5.4
Varity_R		0.83
gMVP		0.64

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: rs778136807; hg19: chr3-134911522; COSMIC: COSV67665206;