3-36992716-A-G

Position:

• chr3-36992716-A-G

Variant summary

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

The NM_014805.4(EPM2AIP1):​c.362T>C​(p.Val121Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: EPM2AIP1 NM_014805.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.92

Genes affected

EPM2AIP1 (HGNC:19735): (EPM2A interacting protein 1) The EPM2A gene, which encodes laforin, is mutated in an autosomal recessive form of adolescent progressive myoclonus epilepsy. The protein encoded by this gene binds to laforin, but its function is not known. This gene is intronless. [provided by RefSeq, Oct 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
EPM2AIP1	NM_014805.4	c.362T>C	p.Val121Ala	missense_variant	1/1	ENST00000322716.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EPM2AIP1	ENST00000322716.8	c.362T>C	p.Val121Ala	missense_variant	1/1		NM_014805.4	P1
EPM2AIP1	ENST00000623924.1	c.63+162T>C		intron_variant		5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000402 AC: 1 AN: 249060 Hom.: 0 AF XY: 0.00000740 AC XY: 1 AN XY: 135130

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000556

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

Bravo AF: 0.0000151

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 19, 2023

The c.362T>C (p.V121A) alteration is located in exon 1 (coding exon 1) of the EPM2AIP1 gene. This alteration results from a T to C substitution at nucleotide position 362, causing the valine (V) at amino acid position 121 to be replaced by an alanine (A). 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	0.54
BayesDel_addAF	Benign	-0.070	T
BayesDel_noAF	Benign	-0.17
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.12	T
Eigen	Benign	0.18
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.55	T
M_CAP	Benign	0.0085	T
MetaRNN	Uncertain	0.58	D
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.1	M
MutationTaster	Benign	0.73	D
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-2.6	D
REVEL	Uncertain	0.29
Sift	Uncertain	0.0040	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.53	P
Vest4		0.57
MutPred		0.74		Loss of stability (P = 0.1365);
MVP		0.32
MPC		1.6
ClinPred		0.97	D
GERP RS		5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.22
gMVP		0.50

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: rs985203670; hg19: chr3-37034207;