4-57110185-G-C

Position:

chr4-57110185-G-C

Variant summary

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

The NM_001553.3(IGFBP7):c.167C>G(p.Ala56Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000216 in 1,390,368 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000016 ( 0 hom. )

Consequence

IGFBP7
NM_001553.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0640

Variant links:

Genes affected

IGFBP7 (HGNC:5476): (insulin like growth factor binding protein 7) This gene encodes a member of the insulin-like growth factor (IGF)-binding protein (IGFBP) family. IGFBPs bind IGFs with high affinity, and regulate IGF availability in body fluids and tissues and modulate IGF binding to its receptors. This protein binds IGF-I and IGF-II with relatively low affinity, and belongs to a subfamily of low-affinity IGFBPs. It also stimulates prostacyclin production and cell adhesion. Alternatively spliced transcript variants encoding different isoforms have been described for this gene, and one variant has been associated with retinal arterial macroaneurysm (PMID:21835307). [provided by RefSeq, Dec 2011]

IGFBP7 links:

IGFBP7-AS1 (HGNC:):

IGFBP7-AS1 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=0.10228479).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IGFBP7	NM_001553.3 linkuse as main transcript	c.167C>G	p.Ala56Gly	missense_variant	1/5	ENST00000295666.6	NP_001544.1	Q16270-1
IGFBP7	NM_001253835.2 linkuse as main transcript	c.167C>G	p.Ala56Gly	missense_variant	1/4		NP_001240764.1	Q16270-2
IGFBP7-AS1	NR_034081.1 linkuse as main transcript	n.209+215G>C		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
IGFBP7	ENST00000295666.6 linkuse as main transcript	c.167C>G	p.Ala56Gly	missense_variant	1/5	1	NM_001553.3	ENSP00000295666.4	Q16270-1
IGFBP7-AS1	ENST00000499667.6 linkuse as main transcript	n.209+215G>C		intron_variant		1
IGFBP7	ENST00000514062.2 linkuse as main transcript	c.167C>G	p.Ala56Gly	missense_variant	1/4	2		ENSP00000486293.1	Q16270-2
IGFBP7-AS1	ENST00000508328.6 linkuse as main transcript	n.191+215G>C		intron_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151844

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.00000161

AC:

AN:

1238524

Hom.:

Cov.:

AF XY:

0.00000330

AC XY:

AN XY:

605204

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:

0.0000178

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000196

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151844

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74172

show subpopulations

Gnomad4 AFR

AF:

0.0000242

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

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 28, 2024

The c.167C>G (p.A56G) alteration is located in exon 1 (coding exon 1) of the IGFBP7 gene. This alteration results from a C to G substitution at nucleotide position 167, causing the alanine (A) at amino acid position 56 to be replaced by a glycine (G). 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

0.089

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.63

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.018

T;.

Eigen

Benign

-0.12

Eigen_PC

Benign

-0.093

FATHMM_MKL

Benign

0.28

LIST_S2

Benign

0.72

T;T

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.10

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.28

N;N

PrimateAI

Pathogenic

0.89

PROVEAN

Benign

-1.2

N;.

REVEL

Benign

0.073

Sift

Benign

0.40

T;.

Sift4G

Benign

0.49

T;T

Polyphen

0.98

D;.

Vest4

0.13

MutPred

0.19

Gain of glycosylation at T53 (P = 0.0969);Gain of glycosylation at T53 (P = 0.0969);

MVP

0.16

MPC

0.95

ClinPred

0.72

GERP RS

3.5

Varity_R

0.20

gMVP

0.35

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