12-26645456-G-T

Position:

• chr12-26645456-G-T

Variant summary

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

The NM_002223.4(ITPR2):​c.2740+8520C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.651 in 152,028 control chromosomes in the GnomAD database, including 32,561 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 0.65 (32561 hom., cov: 32)
• Consequence: ITPR2 NM_002223.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.205

Genes affected

ITPR2 (HGNC:6181): (inositol 1,4,5-trisphosphate receptor type 2) The protein encoded by this gene belongs to the inositol 1,4,5-triphosphate receptor family, whose members are second messenger intracellular calcium release channels. These proteins mediate a rise in cytoplasmic calcium in response to receptor activated production of inositol triphosphate. Inositol triphosphate receptor-mediated signaling is involved in many processes including cell migration, cell division, smooth muscle contraction, and neuronal signaling. This protein is a type 2 receptor that consists of a cytoplasmic amino-terminus that binds inositol triphosphate, six membrane-spanning helices that contribute to the ion pore, and a short cytoplasmic carboxy-terminus. A mutation in this gene has been associated with anhidrosis, suggesting that intracellular calcium release mediated by this protein is required for eccrine sweat production. [provided by RefSeq, Apr 2015]

(HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.873 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ITPR2	NM_002223.4	c.2740+8520C>A		intron_variant		ENST00000381340.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ITPR2	ENST00000381340.8	c.2740+8520C>A		intron_variant		1	NM_002223.4	P1
	ENST00000414098.2	n.150-3297G>T		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes AF: 0.651 AC: 98869 AN: 151910 Hom.: 32534 Cov.: 32

Gnomad AFR AF: 0.604

Gnomad AMI AF: 0.560

Gnomad AMR AF: 0.733

Gnomad ASJ AF: 0.677

Gnomad EAS AF: 0.894

Gnomad SAS AF: 0.621

Gnomad FIN AF: 0.660

Gnomad MID AF: 0.611

Gnomad NFE AF: 0.643

Gnomad OTH AF: 0.652

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

GnomAD4 genome AF: 0.651 AC: 98945 AN: 152028 Hom.: 32561 Cov.: 32 AF XY: 0.653 AC XY: 48506 AN XY: 74314

Gnomad4 AFR AF: 0.604

Gnomad4 AMR AF: 0.734

Gnomad4 ASJ AF: 0.677

Gnomad4 EAS AF: 0.894

Gnomad4 SAS AF: 0.621

Gnomad4 FIN AF: 0.660

Gnomad4 NFE AF: 0.643

Gnomad4 OTH AF: 0.651

Alfa AF: 0.654 Hom.: 5201

Bravo AF: 0.659

Asia WGS AF: 0.759 AC: 2638 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	0.74
DANN	Benign	0.35

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: rs4964010; hg19: chr12-26798389;