NM_198241.3:c.32_33insCCCCCCCCCCC

Variant names:

• chr3-184315822-G-GCCCCCCCCCCC
• rs1406170008
• NM_198241.3:c.32_33insCCCCCCCCCCC

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_Strong

The NM_198241.3(EIF4G1):​c.32_33insCCCCCCCCCCC​(p.Ala13ProfsTer33) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00067 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: EIF4G1 NM_198241.3 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.33
• Publications: 0 publications found

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]

EIF4G1 Gene-Disease associations (from GenCC):

• Parkinson disease 18, autosomal dominant, susceptibility to

  Inheritance: Unknown, AD Classification: MODERATE, LIMITED, NO_KNOWN Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.993 CDS is truncated, and there are 0 pathogenic variants in the truncated region.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198241.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EIF4G1	NM_198241.3	MANE Select	c.32_33insCCCCCCCCCCC	p.Ala13ProfsTer33	frameshift	Exon 3 of 33	NP_937884.2	Q04637-1
	EIF4G1	NM_001194946.2		c.32_33insCCCCCCCCCCC	p.Ala13ProfsTer33	frameshift	Exon 3 of 34	NP_001181875.2	Q04637-9
	EIF4G1	NM_001194947.2		c.32_33insCCCCCCCCCCC	p.Ala13ProfsTer33	frameshift	Exon 2 of 33	NP_001181876.2	Q04637-9

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EIF4G1	ENST00000346169.7	TSL:1 MANE Select	c.32_33insCCCCCCCCCCC	p.Ala13ProfsTer33	frameshift	Exon 3 of 33	ENSP00000316879.5	Q04637-1
	EIF4G1	ENST00000352767.7	TSL:1	c.32_33insCCCCCCCCCCC	p.Ala13ProfsTer33	frameshift	Exon 2 of 33	ENSP00000338020.4	Q04637-9
	EIF4G1	ENST00000382330.7	TSL:1	c.32_33insCCCCCCCCCCC	p.Ala13ProfsTer33	frameshift	Exon 3 of 34	ENSP00000371767.3	Q04637-9

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 151944 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000949

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.000671 AC: 934 AN: 1391804 Hom.: 0 Cov.: 31 AF XY: 0.000607 AC XY: 417 AN XY: 686842

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

African (AFR) AF: 0.000540 AC: 17 AN: 31482

American (AMR) AF: 0.00 AC: 0 AN: 35730

Ashkenazi Jewish (ASJ) AF: 0.000199 AC: 5 AN: 25126

East Asian (EAS) AF: 0.000252 AC: 9 AN: 35742

South Asian (SAS) AF: 0.000190 AC: 15 AN: 79122

European-Finnish (FIN) AF: 0.0000204 AC: 1 AN: 49014

Middle Eastern (MID) AF: 0.000354 AC: 2 AN: 5644

European-Non Finnish (NFE) AF: 0.000802 AC: 860 AN: 1072230

Other (OTH) AF: 0.000433 AC: 25 AN: 57714

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000329 AC: 5 AN: 152062 Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4 AN XY: 74318

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

African (AFR) AF: 0.00 AC: 0 AN: 41506

American (AMR) AF: 0.00 AC: 0 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.000194 AC: 1 AN: 5160

South Asian (SAS) AF: 0.00 AC: 0 AN: 4812

European-Finnish (FIN) AF: 0.0000949 AC: 1 AN: 10542

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 67974

Other (OTH) AF: 0.00 AC: 0 AN: 2104

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		3.3
Mutation Taster		=3/197	disease causing (fs/PTC)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1406170008; hg19: chr3-184033610;