chr13-106495811-C-T

Position:

• chr13-106495811-C-T

Variant summary

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

The NM_004093.4(EFNB2):​c.436G>A​(p.Asp146Asn) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,816 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: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: EFNB2 NM_004093.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.79

Genes affected

EFNB2 (HGNC:3227): (ephrin B2) This gene encodes a member of the ephrin (EPH) family. The ephrins and EPH-related receptors comprise the largest subfamily of receptor protein-tyrosine kinases and have been implicated in mediating developmental events, especially in the nervous system and in erythropoiesis. 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. This gene encodes an EFNB class ephrin which binds to the EPHB4 and EPHA3 receptors. [provided by RefSeq, Jul 2008]

(HGNC:):

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=0.33717418).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EFNB2	NM_004093.4	c.436G>A	p.Asp146Asn	missense_variant	3/5	ENST00000646441.1	NP_004084.1
EFNB2	NM_001372057.1	c.436G>A	p.Asp146Asn	missense_variant	3/4		NP_001358986.1
EFNB2	XM_017020406.3	c.442G>A	p.Asp148Asn	missense_variant	3/5		XP_016875895.1
EFNB2	NM_001372056.1	c.407-817G>A		intron_variant			NP_001358985.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EFNB2	ENST00000646441.1	c.436G>A	p.Asp146Asn	missense_variant	3/5		NM_004093.4	ENSP00000493716	P1
	ENST00000646480.1	n.496+2933C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461816 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727212

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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

Mar 30, 2024

The c.436G>A (p.D146N) alteration is located in exon 3 (coding exon 3) of the EFNB2 gene. This alteration results from a G to A substitution at nucleotide position 436, causing the aspartic acid (D) at amino acid position 146 to be replaced by an asparagine (N). 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	Benign	0.077
BayesDel_addAF	Benign	-0.075	T
BayesDel_noAF	Benign	-0.35
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.67	D;D
Eigen	Benign	0.064
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.84	.;T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.34	T;T
MetaSVM	Benign	-0.30	T
MutationAssessor	Benign	1.4	L;L
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.76	T
PROVEAN	Uncertain	-2.5	D;.
REVEL	Uncertain	0.32
Sift	Benign	0.057	T;.
Sift4G	Benign	0.26	T;.
Polyphen		0.0010	B;B
Vest4		0.22
MutPred		0.32		Gain of disorder (P = 0.2385);Gain of disorder (P = 0.2385);
MVP		0.82
MPC		0.60
ClinPred		0.94	D
GERP RS		5.5
Varity_R		0.62
gMVP		0.83

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: chr13-107148159;