chr3-184316135-G-C

Variant names:

• chr3-184316135-G-C
• rs986322729
• NM_198241.3:c.64G>C

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_198241.3(EIF4G1):​c.64G>C​(p.Ala22Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,614,058 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: EIF4G1 NM_198241.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.44

Genes affected

EIF4G1 (HGNC:3296): (eukaryotic translation initiation factor 4 gamma 1) The protein encoded by this gene is a component of the multi-subunit protein complex EIF4F. This complex facilitates the recruitment of mRNA to the ribosome, which is a rate-limiting step during the initiation phase of protein synthesis. The recognition of the mRNA cap and the ATP-dependent unwinding of 5'-terminal secondary structure is catalyzed by factors in this complex. The subunit encoded by this gene is a large scaffolding protein that contains binding sites for other members of the EIF4F complex. A domain at its N-terminus can also interact with the poly(A)-binding protein, which may mediate the circularization of mRNA during translation. Alternative splicing results in multiple transcript variants, some of which are derived from alternative promoter usage. [provided by RefSeq, Aug 2010]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.15178257).
• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EIF4G1	NM_198241.3	c.64G>C	p.Ala22Pro	missense_variant	Exon 4 of 33	ENST00000346169.7	NP_937884.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EIF4G1	ENST00000346169.7	c.64G>C	p.Ala22Pro	missense_variant	Exon 4 of 33	1	NM_198241.3	ENSP00000316879.5

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152196 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461862 Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5 AN XY: 727236

Gnomad4 AFR exome AF: 0.0000299

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: 0.00000629

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152196 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74360

Gnomad4 AFR AF: 0.0000483

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 27, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.64G>C (p.A22P) alteration is located in exon 4 (coding exon 2) of the EIF4G1 gene. This alteration results from a G to C substitution at nucleotide position 64, causing the alanine (A) at amino acid position 22 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Uncertain	24
DANN	Benign	0.96
DEOGEN2	Benign	0.046	T;.;.;T;.;T;T;.;.
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.12
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Uncertain	0.90	D;D;D;D;.;D;D;D;.
M_CAP	Benign	0.0051	T
MetaRNN	Benign	0.15	T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.98	L;L;.;.;L;.;.;L;L
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-0.060	N;N;N;N;N;N;D;N;N
REVEL	Benign	0.048
Sift	Benign	0.085	T;T;T;T;T;D;D;T;T
Sift4G	Benign	0.51	T;T;T;T;T;T;T;T;T
Polyphen		0.014	B;.;.;.;.;.;.;.;.
Vest4		0.50
MutPred		0.31		Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);Loss of glycosylation at P25 (P = 0.0205);
MVP		0.38
MPC		0.84
ClinPred		0.63	D
GERP RS		4.9
Varity_R		0.19
gMVP		0.063

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: rs986322729; hg19: chr3-184033923;