NM_000618.5:c.220+4996G>T

Variant names:

• chr12-102470647-C-A
• rs1019731
• NM_000618.5:c.220+4996G>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000618.5(IGF1):​c.220+4996G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.101 in 152,190 control chromosomes in the GnomAD database, including 1,073 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.10 (1073 hom., cov: 32)
• Consequence: IGF1 NM_000618.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.162
• Publications: 43 publications found

Genes affected

IGF1 (HGNC:5464): (insulin like growth factor 1) The protein encoded by this gene is similar to insulin in function and structure and is a member of a family of proteins involved in mediating growth and development. The encoded protein is processed from a precursor, bound by a specific receptor, and secreted. Defects in this gene are a cause of insulin-like growth factor I deficiency. Alternative splicing results in multiple transcript variants encoding different isoforms that may undergo similar processing to generate mature protein. [provided by RefSeq, Sep 2015]

LINC02456 (HGNC:53389): (long intergenic non-protein coding RNA 2456)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.69).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.189 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000618.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IGF1	NM_000618.5	MANE Select	c.220+4996G>T		intron	N/A	NP_000609.1
	IGF1	NM_001111285.3		c.220+4996G>T		intron	N/A	NP_001104755.1
	IGF1	NM_001414005.1		c.220+4996G>T		intron	N/A	NP_001400934.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IGF1	ENST00000337514.11	TSL:1 MANE Select	c.220+4996G>T		intron	N/A	ENSP00000337612.7
	IGF1	ENST00000307046.8	TSL:1	c.220+4996G>T		intron	N/A	ENSP00000302665.8
	IGF1	ENST00000424202.6	TSL:1	c.172+4996G>T		intron	N/A	ENSP00000416811.2

Frequencies

GnomAD3 genomes AF: 0.101 AC: 15317 AN: 152072 Hom.: 1076 Cov.: 32

Gnomad AFR AF: 0.0245

Gnomad AMI AF: 0.0888

Gnomad AMR AF: 0.195

Gnomad ASJ AF: 0.0718

Gnomad EAS AF: 0.00154

Gnomad SAS AF: 0.0795

Gnomad FIN AF: 0.129

Gnomad MID AF: 0.0348

Gnomad NFE AF: 0.133

Gnomad OTH AF: 0.0923

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.101 AC: 15317 AN: 152190 Hom.: 1073 Cov.: 32 AF XY: 0.101 AC XY: 7504 AN XY: 74408

African (AFR) AF: 0.0245 AC: 1016 AN: 41530

American (AMR) AF: 0.195 AC: 2979 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.0718 AC: 249 AN: 3466

East Asian (EAS) AF: 0.00155 AC: 8 AN: 5174

South Asian (SAS) AF: 0.0796 AC: 384 AN: 4824

European-Finnish (FIN) AF: 0.129 AC: 1371 AN: 10592

Middle Eastern (MID) AF: 0.0374 AC: 11 AN: 294

European-Non Finnish (NFE) AF: 0.133 AC: 9025 AN: 68002

Other (OTH) AF: 0.0914 AC: 193 AN: 2112

Alfa AF: 0.113 Hom.: 1136

Bravo AF: 0.101

Asia WGS AF: 0.0380 AC: 133 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.69
CADD	Benign	7.1
DANN	Benign	0.68
PhyloP100		0.16
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs1019731; hg19: chr12-102864425;