chr3-134951889-G-C

Position:

• chr3-134951889-G-C

Variant summary

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

The NM_004441.5(EPHB1):​c.642G>C​(p.Glu214Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: EPHB1 NM_004441.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.45

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]

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=0.28046083).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EPHB1	NM_004441.5	c.642G>C	p.Glu214Asp	missense_variant	3/16	ENST00000398015.8	NP_004432.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EPHB1	ENST00000398015.8	c.642G>C	p.Glu214Asp	missense_variant	3/16	1	NM_004441.5	ENSP00000381097	P1
EPHB1	ENST00000482618.5	c.642G>C	p.Glu214Asp	missense_variant, NMD_transcript_variant	3/6	1		ENSP00000420338
EPHB1	ENST00000488154.5	n.471+171G>C		intron_variant, non_coding_transcript_variant		1
EPHB1	ENST00000647596.1	c.642G>C	p.Glu214Asp	missense_variant	3/16			ENSP00000497153

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000468 Hom.: 0

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

Jan 29, 2024

The c.642G>C (p.E214D) alteration is located in exon 3 (coding exon 3) of the EPHB1 gene. This alteration results from a G to C substitution at nucleotide position 642, causing the glutamic acid (E) at amino acid position 214 to be replaced by an aspartic acid (D). 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	0.60
BayesDel_addAF	Uncertain	0.013	T
BayesDel_noAF	Benign	-0.22
CADD	Uncertain	23
DANN	Benign	0.52
DEOGEN2	Benign	0.059	T;.
Eigen	Uncertain	0.28
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.89	D;D
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.28	T;T
MetaSVM	Benign	-0.44	T
MutationAssessor	Benign	1.4	L;.
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-0.42	N;.
REVEL	Uncertain	0.37
Sift	Benign	1.0	T;.
Sift4G	Benign	0.73	T;.
Polyphen		0.99	D;.
Vest4		0.50
MutPred		0.39		Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);
MVP		0.84
MPC		0.46
ClinPred		0.29	T
GERP RS		2.1
Varity_R		0.14
gMVP		0.58

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: rs1933045233; hg19: chr3-134670731;