chr5-107670538-T-C

Position:

• chr5-107670538-T-C

Variant summary

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

The NM_001962.3(EFNA5):​c.76A>G​(p.Lys26Glu) variant causes a missense change. The variant allele was found at a frequency of 0.00000209 in 1,438,104 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: EFNA5 NM_001962.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.04

Genes affected

EFNA5 (HGNC:3225): (ephrin A5) Ephrin-A5, a member of the ephrin gene family, prevents axon bundling in cocultures of cortical neurons with astrocytes, a model of late stage nervous system development and differentiation. The EPH and EPH-related receptors comprise the largest subfamily of receptor protein-tyrosine kinases and have been implicated in mediating developmental events, particularly in the nervous system. EPH receptors typically have a single kinase domain and an extracellular region containing a Cys-rich domain and 2 fibronectin type III repeats. The ephrin ligands and receptors have been named by the Eph Nomenclature Committee (1997). 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 similarly divided into 2 groups based on the similarity of their extracellular domain sequences and their affinities for binding ephrin-A and ephrin-B ligands. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EFNA5	NM_001962.3	c.76A>G	p.Lys26Glu	missense_variant	1/5	ENST00000333274.11
EFNA5	NM_001410773.1	c.76A>G	p.Lys26Glu	missense_variant	1/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EFNA5	ENST00000333274.11	c.76A>G	p.Lys26Glu	missense_variant	1/5	1	NM_001962.3	P3
EFNA5	ENST00000504941.1	n.348A>G		non_coding_transcript_exon_variant	1/2	1
EFNA5	ENST00000509503.1	c.76A>G	p.Lys26Glu	missense_variant	1/4	5		A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000209 AC: 3 AN: 1438104 Hom.: 0 Cov.: 31 AF XY: 0.00000280 AC XY: 2 AN XY: 713224

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: 0.00000273

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

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 05, 2023

The c.76A>G (p.K26E) alteration is located in exon 1 (coding exon 1) of the EFNA5 gene. This alteration results from a A to G substitution at nucleotide position 76, causing the lysine (K) at amino acid position 26 to be replaced by a glutamic acid (E). 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	Uncertain	0.34
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.18	T;.
Eigen	Benign	-0.043
Eigen_PC	Benign	0.072
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Pathogenic	0.44	D
MetaRNN	Uncertain	0.65	D;D
MetaSVM	Uncertain	0.42	D
MutationAssessor	Benign	1.6	L;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-0.99	N;N
REVEL	Uncertain	0.64
Sift	Benign	0.43	T;T
Sift4G	Benign	0.34	T;T
Polyphen		0.061	B;P
Vest4		0.61
MutPred		0.35		Loss of ubiquitination at K26 (P = 0.0155);Loss of ubiquitination at K26 (P = 0.0155);
MVP		0.94
MPC		1.5
ClinPred		0.91	D
GERP RS		4.5
Varity_R		0.38
gMVP		0.60

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: chr5-107006239;