12-26544478-A-G

Variant names:

• chr12-26544478-A-G
• rs10842753
• NM_002223.4:c.5073+5769T>C

Variant summary

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

The NM_002223.4(ITPR2):​c.5073+5769T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.501 in 151,184 control chromosomes in the GnomAD database, including 23,765 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 0.50 (23765 hom., cov: 28)
• Consequence: ITPR2 NM_002223.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.72
• Publications: 6 publications found

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]

ITPR2 Gene-Disease associations (from GenCC):

• isolated anhidrosis with normal sweat glands

  Inheritance: AR Classification: SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.01).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.707 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002223.4. 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
	ITPR2	NM_002223.4	MANE Select	c.5073+5769T>C		intron	N/A	NP_002214.2
	ITPR2	NM_001414174.1		c.5070+5769T>C		intron	N/A	NP_001401103.1
	ITPR2	NM_001414175.1		c.5073+5769T>C		intron	N/A	NP_001401104.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITPR2	ENST00000381340.8	TSL:1 MANE Select	c.5073+5769T>C		intron	N/A	ENSP00000370744.3

Frequencies

GnomAD3 genomes AF: 0.502 AC: 75775 AN: 151066 Hom.: 23769 Cov.: 28

Gnomad AFR AF: 0.149

Gnomad AMI AF: 0.596

Gnomad AMR AF: 0.421

Gnomad ASJ AF: 0.566

Gnomad EAS AF: 0.253

Gnomad SAS AF: 0.577

Gnomad FIN AF: 0.710

Gnomad MID AF: 0.421

Gnomad NFE AF: 0.712

Gnomad OTH AF: 0.505

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

GnomAD4 genome AF: 0.501 AC: 75776 AN: 151184 Hom.: 23765 Cov.: 28 AF XY: 0.499 AC XY: 36846 AN XY: 73790

African (AFR) AF: 0.148 AC: 6132 AN: 41326

American (AMR) AF: 0.421 AC: 6363 AN: 15126

Ashkenazi Jewish (ASJ) AF: 0.566 AC: 1957 AN: 3456

East Asian (EAS) AF: 0.253 AC: 1303 AN: 5146

South Asian (SAS) AF: 0.577 AC: 2757 AN: 4776

European-Finnish (FIN) AF: 0.710 AC: 7377 AN: 10396

Middle Eastern (MID) AF: 0.425 AC: 125 AN: 294

European-Non Finnish (NFE) AF: 0.712 AC: 48181 AN: 67674

Other (OTH) AF: 0.500 AC: 1039 AN: 2080

Alfa AF: 0.624 Hom.: 82182

Bravo AF: 0.462

Asia WGS AF: 0.396 AC: 1378 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.16
DANN	Benign	0.59
PhyloP100		-1.7
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: rs10842753; hg19: chr12-26697411;