2-27366830-G-A

Position:

chr2-27366830-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2PP3_StrongPP5

The NM_001034116.2(EIF2B4):c.1120C>T(p.Arg374Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000483 in 1,614,096 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000047 ( 0 hom. )

Consequence

EIF2B4
NM_001034116.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:1

Conservation

PhyloP100: 4.92

Variant links:

Genes affected

EIF2B4 (HGNC:3260): (eukaryotic translation initiation factor 2B subunit delta) Eukaryotic initiation factor 2B (EIF2B), which is necessary for protein synthesis, is a GTP exchange factor composed of five different subunits. The protein encoded by this gene is the fourth, or delta, subunit. Defects in this gene are a cause of leukoencephalopathy with vanishing white matter (VWM) and ovarioleukodystrophy. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

EIF2B4 links:

GTF3C2-AS2 (HGNC:55699): (GTF3C2 antisense RNA 2)

GTF3C2-AS2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.955

PP5

Variant 2-27366830-G-A is Pathogenic according to our data. Variant chr2-27366830-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 4118.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Pathogenic=1}. Variant chr2-27366830-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EIF2B4	NM_001034116.2 linkuse as main transcript	c.1120C>T	p.Arg374Cys	missense_variant	11/13	ENST00000347454.9	NP_001029288.1
GTF3C2-AS2	NR_183825.1 linkuse as main transcript	n.1746-594G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EIF2B4	ENST00000347454.9 linkuse as main transcript	c.1120C>T	p.Arg374Cys	missense_variant	11/13	1	NM_001034116.2	ENSP00000233552	P4	Q9UI10-1
GTF3C2-AS2	ENST00000412749.1 linkuse as main transcript	n.201-594G>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000676

AC:

AN:

251488

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135920

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000465

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.0000454

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000268

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000477

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.0000941

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000855

Hom.:

Bravo

AF:

0.000117

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Pathogenic:1Uncertain:1

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jul 17, 2021	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 11835386, 29331873, 27535533, 32962729, 15776425) -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 373 of the EIF2B4 protein (p.Arg373Cys). This variant is present in population databases (rs113994035, gnomAD 0.03%). This missense change has been observed in individuals with EIF2B4-related conditions (PMID: 11835386, 15054402, 15776425, 18263758, 25089094, 29331873). This variant is also known as R374C. ClinVar contains an entry for this variant (Variation ID: 4118). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. This variant disrupts the p.Arg373 amino acid residue in EIF2B4. Other variant(s) that disrupt this residue have been observed in individuals with EIF2B4-related conditions (PMID: 33432707), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic. -

Leukoencephalopathy with vanishing white matter 4

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 01, 2002

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.090

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Pathogenic

0.30

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.19

T;D;.;.;D

Eigen

Uncertain

0.41

Eigen_PC

Uncertain

0.33

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.92

D;D;D;D;D

M_CAP

Uncertain

0.28

MetaRNN

Pathogenic

0.95

D;D;D;D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

3.1

.;M;.;.;.

MutationTaster

Benign

1.0

A;A;A;A

PrimateAI

Benign

0.29

PROVEAN

Pathogenic

-7.2

.;D;D;D;D

REVEL

Pathogenic

0.69

Sift

Uncertain

0.0060

.;D;D;D;D

Sift4G

Pathogenic

0.0010

D;D;D;D;D

Polyphen

0.36, 1.0, 0.99

.;B;D;D;.

Vest4

0.77

MVP

0.94

MPC

1.2

ClinPred

0.71

GERP RS

6.0

Varity_R

0.68

gMVP

0.89

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over