20-63488083-G-C

Variant names:

• chr20-63488083-G-C
• rs540084015
• ENST00000298049.13:c.1420C>G

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 2P and 8B. PM2 BP4_Moderate BP6_Moderate BS1

The NM_001958.5(EEF1A2):​c.*215C>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000243 in 164,770 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000079 (0 hom.)
• Consequence: EEF1A2 NM_001958.5 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.0350
• Publications: 0 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.4).
• BP6: Variant 20-63488083-G-C is Benign according to our data. Variant chr20-63488083-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 3257266.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0000197 (3/152038) while in subpopulation NFE AF = 0.0000441 (3/67966). AF 95% confidence interval is 0.0000117. There are 0 homozygotes in GnomAd4. There are 1 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EEF1A2	NM_001958.5	c.*215C>G		3_prime_UTR_variant	Exon 8 of 8	ENST00000217182.6	NP_001949.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EEF1A2	ENST00000217182.6	c.*215C>G		3_prime_UTR_variant	Exon 8 of 8	1	NM_001958.5	ENSP00000217182.3

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152038 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000441

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000785 AC: 1 AN: 12732 Hom.: 0 Cov.: 3 AF XY: 0.000159 AC XY: 1 AN XY: 6272

African (AFR) AF: 0.00 AC: 0 AN: 216

American (AMR) AF: 0.00 AC: 0 AN: 24

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 74

East Asian (EAS) AF: 0.00 AC: 0 AN: 178

South Asian (SAS) AF: 0.00 AC: 0 AN: 232

European-Finnish (FIN) AC: 0 AN: 0

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 22

European-Non Finnish (NFE) AF: 0.0000862 AC: 1 AN: 11606

Other (OTH) AF: 0.00 AC: 0 AN: 380

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152038 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74262

African (AFR) AF: 0.00 AC: 0 AN: 41422

American (AMR) AF: 0.00 AC: 0 AN: 15276

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5172

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10588

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

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 67966

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000831

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Jul 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

EEF1A2: BP4, BP7 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.40
CADD	Benign	11
DANN	Benign	0.87
PhyloP100		-0.035
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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: rs540084015; hg19: chr20-62119436;