12-26434645-G-A

Position:

• chr12-26434645-G-A

Variant summary

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

The NM_002223.4(ITPR2):​c.6769+1576C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.733 in 152,008 control chromosomes in the GnomAD database, including 41,294 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 0.73 (41294 hom., cov: 31)
• Consequence: ITPR2 NM_002223.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.864

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.04).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.797 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITPR2	NM_002223.4	c.6769+1576C>T		intron_variant		ENST00000381340.8	NP_002214.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITPR2	ENST00000381340.8	c.6769+1576C>T		intron_variant		1	NM_002223.4	ENSP00000370744	P1
ITPR2	ENST00000451599.6	c.*1288+1576C>T		intron_variant, NMD_transcript_variant		1		ENSP00000408287

Frequencies

GnomAD3 genomes AF: 0.733 AC: 111359 AN: 151888 Hom.: 41266 Cov.: 31

Gnomad AFR AF: 0.667

Gnomad AMI AF: 0.889

Gnomad AMR AF: 0.630

Gnomad ASJ AF: 0.684

Gnomad EAS AF: 0.591

Gnomad SAS AF: 0.691

Gnomad FIN AF: 0.788

Gnomad MID AF: 0.668

Gnomad NFE AF: 0.803

Gnomad OTH AF: 0.721

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

GnomAD4 genome AF: 0.733 AC: 111436 AN: 152008 Hom.: 41294 Cov.: 31 AF XY: 0.729 AC XY: 54122 AN XY: 74290

Gnomad4 AFR AF: 0.667

Gnomad4 AMR AF: 0.630

Gnomad4 ASJ AF: 0.684

Gnomad4 EAS AF: 0.590

Gnomad4 SAS AF: 0.692

Gnomad4 FIN AF: 0.788

Gnomad4 NFE AF: 0.803

Gnomad4 OTH AF: 0.722

Alfa AF: 0.774 Hom.: 21653

Bravo AF: 0.717

Asia WGS AF: 0.643 AC: 2239 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	4.2
DANN	Benign	0.67

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: rs10771283; hg19: chr12-26587578;