19-3977530-G-C

Variant names:

• chr19-3977530-G-C
• rs779468968
• NM_001961.4:c.2148C>G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001961.4(EEF2):​c.2148C>G​(p.Arg716Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. R716R) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: EEF2 NM_001961.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.98
• Publications: 0 publications found

Genes affected

EEF2 (HGNC:3214): (eukaryotic translation elongation factor 2) This gene encodes a member of the GTP-binding translation elongation factor family. This protein is an essential factor for protein synthesis. It promotes the GTP-dependent translocation of the nascent protein chain from the A-site to the P-site of the ribosome. This protein is completely inactivated by EF-2 kinase phosporylation. [provided by RefSeq, Jul 2008]

EEF2 Gene-Disease associations (from GenCC):

• spinocerebellar ataxia type 26

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• neurodevelopmental disorder

  Inheritance: AD Classification: MODERATE, LIMITED Submitted by: G2P, Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP7: Synonymous conserved (PhyloP=-2.97 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001961.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EEF2	NM_001961.4	MANE Select	c.2148C>G	p.Arg716Arg	synonymous	Exon 13 of 15	NP_001952.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EEF2	ENST00000309311.7	TSL:5 MANE Select	c.2148C>G	p.Arg716Arg	synonymous	Exon 13 of 15	ENSP00000307940.5
	EEF2	ENST00000600794.1	TSL:3	c.106+498C>G		intron	N/A	ENSP00000471265.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1436790 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 713968

African (AFR) AF: 0.00 AC: 0 AN: 33228

American (AMR) AF: 0.00 AC: 0 AN: 42298

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25388

East Asian (EAS) AF: 0.00 AC: 0 AN: 39312

South Asian (SAS) AF: 0.00 AC: 0 AN: 84276

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 41600

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5688

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1105320

Other (OTH) AF: 0.00 AC: 0 AN: 59680

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	0.084
DANN	Benign	0.68
PhyloP100		-3.0

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: rs779468968; hg19: chr19-3977528;