2-216676813-C-T

Variant names:

• chr2-216676813-C-T
• NM_000599.4:c.757G>A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000599.4(IGFBP5):​c.757G>A​(p.Gly253Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,794 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: IGFBP5 NM_000599.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.49

Genes affected

IGFBP5 (HGNC:5474): (insulin like growth factor binding protein 5) Enables insulin-like growth factor I binding activity. Involved in several processes, including cellular response to cAMP; regulation of smooth muscle cell migration; and regulation of smooth muscle cell proliferation. Part of insulin-like growth factor ternary complex. Biomarker of pulmonary fibrosis. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IGFBP5	NM_000599.4	c.757G>A	p.Gly253Ser	missense_variant	Exon 4 of 4	ENST00000233813.5	NP_000590.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IGFBP5	ENST00000233813.5	c.757G>A	p.Gly253Ser	missense_variant	Exon 4 of 4	1	NM_000599.4	ENSP00000233813.4

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461794 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 727198

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 30

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 09, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.757G>A (p.G253S) alteration is located in exon 4 (coding exon 4) of the IGFBP5 gene. This alteration results from a G to A substitution at nucleotide position 757, causing the glycine (G) at amino acid position 253 to be replaced by a serine (S). 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	0.091
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.17
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.42	T
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.83	T
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.73	D
MetaSVM	Uncertain	0.17	D
MutationAssessor	Benign	1.8	L
PrimateAI	Uncertain	0.62	T
PROVEAN	Uncertain	-4.3	D
REVEL	Pathogenic	0.66
Sift	Benign	0.042	D
Sift4G	Uncertain	0.0090	D
Polyphen		1.0	D
Vest4		0.38
MutPred		0.74		Gain of catalytic residue at M249 (P = 0.0302);
MVP		0.87
MPC		1.4
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.53
gMVP		0.88

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-217541536;