Genetic Variant EEF1A2:p.Ala461Glu (chr20-63488308-G-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001958.5(EEF1A2):c.1382C>A(p.Ala461Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000815 in 1,227,098 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A461V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 8.1e-7 ( 0 hom. )

Consequence

EEF1A2
NM_001958.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.33

Publications

0 publications found

Variant links:

Genes affected

EEF1A2 (HGNC:3192): (eukaryotic translation elongation factor 1 alpha 2) This gene encodes an isoform of the alpha subunit of the elongation factor-1 complex, which is responsible for the enzymatic delivery of aminoacyl tRNAs to the ribosome. This isoform (alpha 2) is expressed in brain, heart and skeletal muscle, and the other isoform (alpha 1) is expressed in brain, placenta, lung, liver, kidney, and pancreas. This gene may be critical in the development of ovarian cancer. [provided by RefSeq, Mar 2014]

EEF1A2 Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
developmental and epileptic encephalopathy, 33
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
autosomal dominant non-syndromic intellectual disability
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
undetermined early-onset epileptic encephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

EEF1A2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.37060595).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EEF1A2	NM_001958.5 link	c.1382C>A	p.Ala461Glu	missense_variant	Exon 8 of 8	ENST00000217182.6	NP_001949.1	Q05639

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EEF1A2	ENST00000217182.6 link	c.1382C>A	p.Ala461Glu	missense_variant	Exon 8 of 8	1	NM_001958.5	ENSP00000217182.3		Q05639

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

8.15e-7

AC:

AN:

1227098

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

603564

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

24778

American (AMR)

AF:

0.00

AC:

AN:

22042

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

20434

East Asian (EAS)

AF:

0.00

AC:

AN:

24572

South Asian (SAS)

AF:

0.00

AC:

AN:

64560

European-Finnish (FIN)

AF:

0.0000333

AC:

AN:

30022

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3892

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

988458

Other (OTH)

AF:

0.00

AC:

AN:

48340

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.047

BayesDel_noAF

Benign

-0.31

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.27

Eigen

Benign

0.17

Eigen_PC

Benign

0.15

FATHMM_MKL

Benign

0.71

LIST_S2

Benign

0.74

M_CAP

Pathogenic

0.83

MetaRNN

Benign

0.37

MetaSVM

Benign

-0.68

MutationAssessor

Benign

1.6

PhyloP100

3.3

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-0.27

REVEL

Benign

0.12

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0010

Polyphen

0.63

Vest4

0.40

MutPred

0.19

Gain of solvent accessibility (P = 0.0261);

MVP

0.42

MPC

1.9

ClinPred

0.89

GERP RS

2.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.57

gMVP

0.57

Mutation Taster

=75/25

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over