chr2-216678890-C-A

Variant names:

• chr2-216678890-C-A
• rs138553887
• NM_000599.4:c.527G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000599.4(IGFBP5):​c.527G>T​(p.Arg176Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R176Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: IGFBP5 NM_000599.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.46
• Publications: 0 publications found

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

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1454556).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IGFBP5	NM_000599.4	c.527G>T	p.Arg176Leu	missense_variant	Exon 2 of 4	ENST00000233813.5	NP_000590.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IGFBP5	ENST00000233813.5	c.527G>T	p.Arg176Leu	missense_variant	Exon 2 of 4	1	NM_000599.4	ENSP00000233813.4
IGFBP5	ENST00000449583.1	c.662G>T	p.Arg221Leu	missense_variant	Exon 2 of 2	3		ENSP00000413474.1
IGFBP5	ENST00000486341.1	n.419G>T		non_coding_transcript_exon_variant	Exon 2 of 2	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461884 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727244

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112006

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Benign	-0.038	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.19	T;.
Eigen	Benign	-0.053
Eigen_PC	Benign	0.027
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.89	D;D
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.15	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	L;.
PhyloP100		3.5
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	0.10	N;N
REVEL	Benign	0.091
Sift	Benign	0.74	T;T
Sift4G	Benign	0.41	T;T
Polyphen		0.65	P;.
Vest4		0.63
MutPred		0.37		Loss of MoRF binding (P = 0.0554);.;
MVP		0.69
MPC		1.1
ClinPred		0.50	D
GERP RS		4.0
Varity_R		0.13
gMVP		0.53
Mutation Taster		=84/16	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs138553887; hg19: chr2-217543613;