Genetic Variant IGFN1:p.Lys92Gln (chr1-201197224-A-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001164586.2(IGFN1):c.274A>C(p.Lys92Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000968 in 1,549,922 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

IGFN1
NM_001164586.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.03

Variant links:

Genes affected

IGFN1 (HGNC:24607): (immunoglobulin like and fibronectin type III domain containing 1) Predicted to be involved in homophilic cell adhesion via plasma membrane adhesion molecules; retina layer formation; and synapse assembly. Predicted to be located in Z disc and nucleus. Predicted to be active in synapse. [provided by Alliance of Genome Resources, Apr 2022]

IGFN1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.17043138).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IGFN1	NM_001164586.2 link	c.274A>C	p.Lys92Gln	missense_variant	Exon 5 of 24	ENST00000335211.9	NP_001158058.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
IGFN1	ENST00000335211.9 link	c.274A>C	p.Lys92Gln	missense_variant	Exon 5 of 24	5	NM_001164586.2	ENSP00000334714.4	Q86VF2-5
IGFN1	ENST00000437879.6 link	n.274A>C		non_coding_transcript_exon_variant	Exon 5 of 26	1		ENSP00000399041.2	Q86VF2-4
IGFN1	ENST00000295591.12 link	c.274A>C	p.Lys92Gln	missense_variant	Exon 5 of 25	5		ENSP00000295591.9	Q86VF2-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152258

Hom.:

Cov.:

show subpopulations

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:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000256

AC:

AN:

156090

Hom.:

AF XY:

0.0000242

AC XY:

AN XY:

82746

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000176

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000100

AC:

AN:

1397546

Hom.:

Cov.:

AF XY:

0.0000102

AC XY:

AN XY:

689186

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000177

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000656

AC:

AN:

152376

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74510

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 05, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.274A>C (p.K92Q) alteration is located in exon 5 (coding exon 4) of the IGFN1 gene. This alteration results from a A to C substitution at nucleotide position 274, causing the lysine (K) at amino acid position 92 to be replaced by a glutamine (Q). 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

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.010

.;T

Eigen

Benign

0.18

Eigen_PC

Benign

0.21

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.68

T;T

M_CAP

Benign

0.030

MetaRNN

Benign

0.17

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.5

L;L

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-1.7

N;.

REVEL

Benign

0.087

Sift

Uncertain

0.016

D;.

Sift4G

Uncertain

0.0050

D;T

Vest4

0.33

MutPred

0.46

Loss of ubiquitination at K92 (P = 0.0127);Loss of ubiquitination at K92 (P = 0.0127);

MVP

0.44

ClinPred

0.54

GERP RS

3.9

Varity_R

0.13

gMVP

0.37

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over