chr12-102445336-A-C

Position:

• chr12-102445336-A-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000618.5(IGF1):​c.221-25646T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.765 in 152,090 control chromosomes in the GnomAD database, including 44,598 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 0.77 (44598 hom., cov: 31)
• Consequence: IGF1 NM_000618.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.645

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

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.94).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.822 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IGF1	NM_000618.5	c.221-25646T>G		intron_variant		ENST00000337514.11	NP_000609.1
LINC02456	XR_007063427.1	n.6801-10451A>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IGF1	ENST00000337514.11	c.221-25646T>G		intron_variant		1	NM_000618.5	ENSP00000337612	P1
LINC02456	ENST00000704346.1	n.1177-17392A>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes AF: 0.765 AC: 116297 AN: 151972 Hom.: 44565 Cov.: 31

Gnomad AFR AF: 0.766

Gnomad AMI AF: 0.909

Gnomad AMR AF: 0.834

Gnomad ASJ AF: 0.741

Gnomad EAS AF: 0.831

Gnomad SAS AF: 0.713

Gnomad FIN AF: 0.768

Gnomad MID AF: 0.728

Gnomad NFE AF: 0.747

Gnomad OTH AF: 0.771

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

GnomAD4 genome AF: 0.765 AC: 116383 AN: 152090 Hom.: 44598 Cov.: 31 AF XY: 0.767 AC XY: 57064 AN XY: 74362

Gnomad4 AFR AF: 0.766

Gnomad4 AMR AF: 0.834

Gnomad4 ASJ AF: 0.741

Gnomad4 EAS AF: 0.831

Gnomad4 SAS AF: 0.712

Gnomad4 FIN AF: 0.768

Gnomad4 NFE AF: 0.747

Gnomad4 OTH AF: 0.770

Alfa AF: 0.749 Hom.: 5198

Bravo AF: 0.774

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	0.69
DANN	Benign	0.79

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

Other links and lift over

dbSNP: rs10778175; hg19: chr12-102839114;