chr15-98649689-C-T

Position:

• chr15-98649689-C-T

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 0P and 18B. BP4_Moderate BP6_Very_Strong BS1 BS2

The NM_000875.5(IGF1R):​c.94+14C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00172 in 1,593,810 control chromosomes in the GnomAD database, including 31 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0097 (20 hom., cov: 32)
  • Exomes 𝑓: 0.00088 (11 hom.)
• Consequence: IGF1R NM_000875.5 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.681

Genes affected

IGF1R (HGNC:5465): (insulin like growth factor 1 receptor) This receptor binds insulin-like growth factor with a high affinity. It has tyrosine kinase activity. The insulin-like growth factor I receptor plays a critical role in transformation events. Cleavage of the precursor generates alpha and beta subunits. It is highly overexpressed in most malignant tissues where it functions as an anti-apoptotic agent by enhancing cell survival. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, May 2014]

IRAIN (HGNC:):

ACMG classification

Verdict is Benign. Variant got -18 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.34).
• BP6: Variant 15-98649689-C-T is Benign according to our data. Variant chr15-98649689-C-T is described in ClinVar as [Benign]. Clinvar id is 317439.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr15-98649689-C-T is described in Lovd as [Likely_benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00968 (1473/152142) while in subpopulation AFR AF= 0.0337 (1399/41536). AF 95% confidence interval is 0.0322. There are 20 homozygotes in gnomad4. There are 723 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 20 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IGF1R	NM_000875.5	c.94+14C>T		intron_variant		ENST00000650285.1
IRAIN	NR_126453.2	n.1099G>A		non_coding_transcript_exon_variant	1/1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IGF1R	ENST00000650285.1	c.94+14C>T		intron_variant			NM_000875.5	P4
IGF1R	ENST00000559925.5	n.94+14C>T		intron_variant, non_coding_transcript_variant		1
IGF1R	ENST00000649865.1	c.94+14C>T		intron_variant				A1

Frequencies

GnomAD3 genomes AF: 0.00967 AC: 1470 AN: 152036 Hom.: 20 Cov.: 32

Gnomad AFR AF: 0.0337

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00353

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00318

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.00526

GnomAD3 exomes AF: 0.00231 AC: 568 AN: 245420 Hom.: 10 AF XY: 0.00187 AC XY: 249 AN XY: 133496

Gnomad AFR exome AF: 0.0329

Gnomad AMR exome AF: 0.00135

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000333

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000450

Gnomad OTH exome AF: 0.000506

GnomAD4 exome AF: 0.000875 AC: 1262 AN: 1441668 Hom.: 11 Cov.: 28 AF XY: 0.000777 AC XY: 558 AN XY: 718222

Gnomad4 AFR exome AF: 0.0315

Gnomad4 AMR exome AF: 0.00156

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000234

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000912

Gnomad4 OTH exome AF: 0.00235

GnomAD4 genome AF: 0.00968 AC: 1473 AN: 152142 Hom.: 20 Cov.: 32 AF XY: 0.00972 AC XY: 723 AN XY: 74374

Gnomad4 AFR AF: 0.0337

Gnomad4 AMR AF: 0.00353

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.00521

Alfa AF: 0.00507 Hom.: 4

Bravo AF: 0.0108

Asia WGS AF: 0.00115 AC: 4 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Growth delay due to insulin-like growth factor I resistance Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 30, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.34
CADD	Benign	19
DANN	Uncertain	0.99

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

LitVar

Other links and lift over

dbSNP: rs35275105; hg19: chr15-99192918; COSMIC: COSV51273197; COSMIC: COSV51273197;