3-4670904-C-T

Position:

• chr3-4670904-C-T

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001378452.1(ITPR1):​c.2182C>T​(p.Arg728*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000277 in 1,441,550 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000028 (0 hom.)
• Consequence: ITPR1 NM_001378452.1 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.02

Genes affected

ITPR1 (HGNC:6180): (inositol 1,4,5-trisphosphate receptor type 1) This gene encodes an intracellular receptor for inositol 1,4,5-trisphosphate. Upon stimulation by inositol 1,4,5-trisphosphate, this receptor mediates calcium release from the endoplasmic reticulum. Mutations in this gene cause spinocerebellar ataxia type 15, a disease associated with an heterogeneous group of cerebellar disorders. Multiple transcript variants have been identified for this gene. [provided by RefSeq, Nov 2009]

ITPR1 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 3-4670904-C-T is Pathogenic according to our data. Variant chr3-4670904-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 235916.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr3-4670904-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITPR1	NM_001378452.1	c.2182C>T	p.Arg728*	stop_gained	20/62	ENST00000649015.2	NP_001365381.1
ITPR1	NM_001168272.2	c.2137C>T	p.Arg713*	stop_gained	19/61		NP_001161744.1
ITPR1	NM_001099952.4	c.2182C>T	p.Arg728*	stop_gained	20/59		NP_001093422.2
ITPR1	NM_002222.7	c.2137C>T	p.Arg713*	stop_gained	19/58		NP_002213.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITPR1	ENST00000649015.2	c.2182C>T	p.Arg728*	stop_gained	20/62		NM_001378452.1	ENSP00000497605.1
ITPR1	ENST00000354582.12	c.2182C>T	p.Arg728*	stop_gained	20/62	5		ENSP00000346595.8
ITPR1	ENST00000648266.1	c.2182C>T	p.Arg728*	stop_gained	20/62			ENSP00000498014.1
ITPR1	ENST00000650294.1	c.2137C>T	p.Arg713*	stop_gained	19/61			ENSP00000498056.1
ITPR1	ENST00000443694.5	c.2137C>T	p.Arg713*	stop_gained	19/61	1		ENSP00000401671.2
ITPR1	ENST00000648309.1	c.2137C>T	p.Arg713*	stop_gained	17/59			ENSP00000497026.1
ITPR1	ENST00000357086.10	c.2182C>T	p.Arg728*	stop_gained	20/59	1		ENSP00000349597.4
ITPR1	ENST00000456211.8	c.2137C>T	p.Arg713*	stop_gained	19/58	1		ENSP00000397885.2
ITPR1	ENST00000648038.1	c.19C>T	p.Arg7*	stop_gained	1/42			ENSP00000497872.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000277 AC: 4 AN: 1441550 Hom.: 0 Cov.: 32 AF XY: 0.00000140 AC XY: 1 AN XY: 714138

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000364

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Gillespie syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jul 20, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.50
CADD	Pathogenic	40
DANN	Uncertain	1.0
Eigen	Pathogenic	0.70
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Uncertain	0.79	D
Vest4		0.95
GERP RS		3.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs878853172; hg19: chr3-4712588;