rs758849172

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_000612.6(IGF2):c.460C>T(p.Arg154Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000033 in 1,606,780 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

IGF2
NM_000612.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.56

Variant links:

Genes affected

IGF2 (HGNC:5466): (insulin like growth factor 2) This gene encodes a member of the insulin family of polypeptide growth factors, which are involved in development and growth. It is an imprinted gene, expressed only from the paternal allele, and epigenetic changes at this locus are associated with Wilms tumour, Beckwith-Wiedemann syndrome, rhabdomyosarcoma, and Silver-Russell syndrome. A read-through INS-IGF2 gene exists, whose 5' region overlaps the INS gene and the 3' region overlaps this gene. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2010]

IGF2 links:

ENSG00000284779 (HGNC:):

ENSG00000284779 links:

INS-IGF2 (HGNC:33527): (INS-IGF2 readthrough) This locus includes two alternatively spliced read-through transcript variants which align to the INS gene in the 5' region and to the IGF2 gene in the 3' region. One transcript is predicted to encode a protein which shares the N-terminus with the INS protein but has a distinct and longer C-terminus, whereas the other transcript is a candidate for nonsense-mediated decay (NMD). The transcripts are imprinted and are paternally expressed in the limb and eye. [provided by RefSeq, Jul 2008]

INS-IGF2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP4

Computational evidence support a benign effect (MetaRNN=0.25657028).

BS2

High AC in GnomAdExome4 at 49 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IGF2	NM_000612.6 link	c.460C>T	p.Arg154Cys	missense_variant	Exon 4 of 4	ENST00000416167.7	NP_000603.1	P01344-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
IGF2	ENST00000416167.7 link	c.460C>T	p.Arg154Cys	missense_variant	Exon 4 of 4	1	NM_000612.6	ENSP00000414497.2	P01344-1
IGF2	ENST00000381392.5 link	c.469C>T	p.Arg157Cys	missense_variant	Exon 4 of 4	1		ENSP00000370799.1	P01344-2
IGF2	ENST00000381406.8 link	c.469C>T	p.Arg157Cys	missense_variant	Exon 4 of 4	2		ENSP00000370813.4	P01344-2
ENSG00000284779	ENST00000643349.2 link	c.*512C>T		3_prime_UTR_variant	Exon 5 of 5			ENSP00000495715.1	A0A2R8Y747

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152230

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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

GnomAD2 exomes

AF:

0.0000287

AC:

AN:

244134

AF XY:

0.0000377

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 FIN exome

AF:

0.0000465

Gnomad NFE exome

AF:

0.0000550

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000337

AC:

AN:

1454550

Hom.:

Cov.:

AF XY:

0.0000374

AC XY:

AN XY:

722818

show subpopulations

African (AFR)

AF:

0.0000301

AC:

AN:

33270

American (AMR)

AF:

0.0000456

AC:

AN:

43818

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25900

East Asian (EAS)

AF:

0.00

AC:

AN:

39386

South Asian (SAS)

AF:

0.0000234

AC:

AN:

85626

European-Finnish (FIN)

AF:

0.0000190

AC:

AN:

52574

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5740

European-Non Finnish (NFE)

AF:

0.0000370

AC:

AN:

1108224

Other (OTH)

AF:

0.0000333

AC:

AN:

60012

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.459

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152230

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74374

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41460

American (AMR)

AF:

0.0000654

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68036

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000581

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.0000165

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000594

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Mar 20, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.628C>T (p.R210C) alteration is located in exon 5 (coding exon 4) of the IGF2 gene. This alteration results from a C to T substitution at nucleotide position 628, causing the arginine (R) at amino acid position 210 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Jan 27, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 154 of the IGF2 protein (p.Arg154Cys). This variant is present in population databases (rs758849172, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with IGF2-related conditions. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.47

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.37

T;.;T;T;.;.;T;T

Eigen

Benign

-0.16

Eigen_PC

Benign

-0.38

FATHMM_MKL

Benign

0.53

LIST_S2

Uncertain

0.88

.;.;.;.;D;D;.;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.26

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.96

MutationAssessor

Uncertain

2.3

M;.;M;M;.;.;M;M

PhyloP100

1.6

PrimateAI

Benign

0.42

PROVEAN

Benign

-1.4

N;N;N;.;N;N;N;N

REVEL

Benign

0.092

Sift

Benign

0.18

T;T;T;.;T;T;T;T

Sift4G

Benign

0.18

T;T;T;.;T;T;T;T

Polyphen

1.0

D;.;D;D;.;.;D;D

Vest4

0.25

MVP

0.74

MPC

1.9

ClinPred

0.40

GERP RS

0.95

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.13

gMVP

0.33

Mutation Taster

=90/10

polymorphism

(source)

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

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rs758849172

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over