14-75002991-A-G

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PS1_Moderate PM2

The NM_014239.4(EIF2B2):c.1A>G(p.Met1?) variant causes a start lost change. The variant allele was found at a frequency of 0.00000137 in 1,461,752 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: EIF2B2 NM_014239.4 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.23

Genes affected

EIF2B2 (HGNC:3258): (eukaryotic translation initiation factor 2B subunit beta) This gene encodes the beta subunit of eukaryotic initiation factor-2B (EIF2B). EIF2B is involved in protein synthesis and exchanges GDP and GTP for its activation and deactivation. [provided by RefSeq, Aug 2011]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PS1: Another start lost variant in NM_014239.4 (EIF2B2) was described as [Likely_pathogenic] in ClinVar as 984938
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EIF2B2	NM_014239.4	c.1A>G	p.Met1?	start_lost	1/8	ENST00000266126.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EIF2B2	ENST00000266126.10	c.1A>G	p.Met1?	start_lost	1/8	1	NM_014239.4	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461752 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 727180

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: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Vanishing white matter disease Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Jun 24, 2022

Based on the classification scheme VCGS_Germline_v1.1.1, this variant is classified as 3A - VUS. Following criteria are met: 0102 - Loss-of-function is a known mechanism of disease for this gene. (N) 0106 - This gene is known to be associated with autosomal recessive disease. (N) 0206 - Variant is predicted to result in a loss of the canonical translation initiation codon (ATG). (P) 0252 - Variant is homozygous. (N) 0304 - Variant is present in gnomAD <0.01 for a recessive condition (4 Heterozygous, 0 Homozygous). (P) 0502 - Missense variant with conflicting in silico predictions or uninformative conservation. (N) 0705 - No comparable variants have previous evidence for pathogenicity. (N) 0803 - Low previous evidence of pathogenicity in unrelated individuals. NM_014239.4( EIF2B2 ): c.3G>T; p.(Met1?) has previously been classified as pathogenic (ClinVar). (P) 0905 - No segregation evidence has been identified for this variant. (N) 1007 - No published functional evidence has been identified for this variant in the literature. (N) 1208 - Inheritance information for this variant is not currently available. (N) Legend: (P) - Pathogenic, (N) - Neutral, (B) - Benign -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.030
Cadd	Benign	21
Dann	Uncertain	0.99
DEOGEN2	Benign	0.13	T
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.80	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.64	D
MutationTaster	Benign	1.0	D
PROVEAN	Benign	-1.4	N
REVEL	Pathogenic	0.71
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.030	D
Polyphen		0.86	P
Vest4		0.78
MutPred		0.97		Gain of catalytic residue at P2 (P = 5e-04);
MVP		0.99
ClinPred		1.0	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.94
gMVP		0.68

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs199671360; hg19: chr14-75469694;