3-36991664-C-G

Variant names:

• chr3-36991664-C-G
• rs1186431888
• NM_014805.4:c.1414G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_014805.4(EPM2AIP1):​c.1414G>C​(p.Glu472Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,612,336 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: EPM2AIP1 NM_014805.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.291
• Publications: 0 publications found

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

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14257756).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EPM2AIP1	NM_014805.4	c.1414G>C	p.Glu472Gln	missense_variant	Exon 1 of 1	ENST00000322716.8	NP_055620.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EPM2AIP1	ENST00000322716.8	c.1414G>C	p.Glu472Gln	missense_variant	Exon 1 of 1	6	NM_014805.4	ENSP00000406027.1
EPM2AIP1	ENST00000624586.1	c.387+217G>C		intron_variant	Intron 1 of 1	5		ENSP00000485091.1
EPM2AIP1	ENST00000623924.1	c.62+1214G>C		intron_variant	Intron 1 of 2	5		ENSP00000485489.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152148 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

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: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000404 AC: 1 AN: 247298 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000891

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1460188 Hom.: 0 Cov.: 33 AF XY: 0.00000413 AC XY: 3 AN XY: 726446

African (AFR) AF: 0.00 AC: 0 AN: 33316

American (AMR) AF: 0.00 AC: 0 AN: 44398

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26056

East Asian (EAS) AF: 0.00 AC: 0 AN: 39684

South Asian (SAS) AF: 0.00 AC: 0 AN: 86154

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53144

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111398

Other (OTH) AF: 0.00 AC: 0 AN: 60274

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152148 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74328

African (AFR) AF: 0.00 AC: 0 AN: 41432

American (AMR) AF: 0.0000655 AC: 1 AN: 15272

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5202

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10604

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68022

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.0000282 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 31, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1414G>C (p.E472Q) alteration is located in exon 1 (coding exon 1) of the EPM2AIP1 gene. This alteration results from a G to C substitution at nucleotide position 1414, causing the glutamic acid (E) at amino acid position 472 to be replaced by a glutamine (Q). 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	0.12
BayesDel_addAF	Benign	-0.30	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.022	T
Eigen	Benign	-0.082
Eigen_PC	Benign	0.043
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.0052	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.81	L
PhyloP100		0.29
PrimateAI	Benign	0.39	T
PROVEAN	Benign	0.010	N
REVEL	Benign	0.025
Sift	Benign	0.074	T
Sift4G	Pathogenic	0.0	D
Polyphen		0.40	B
Vest4		0.12
MutPred		0.34		Gain of MoRF binding (P = 0.0267);
MVP		0.36
MPC		1.4
ClinPred		0.25	T
GERP RS		3.8
Varity_R		0.13
gMVP		0.31
Mutation Taster		=94/6	polymorphism

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

Other links and lift over

dbSNP: rs1186431888; hg19: chr3-37033155;