3-4658161-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_001378452.1(ITPR1):c.1034G>A(p.Arg345Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000942 in 1,613,076 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R345W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000089 ( 0 hom. )

Consequence

ITPR1
NM_001378452.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 2.60

Publications

1 publications found

Variant links:

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 Gene-Disease associations (from GenCC):

aniridia-cerebellar ataxia-intellectual disability syndrome
Inheritance: AD, AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, ClinGen, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
spinocerebellar ataxia type 29
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae)
spinocerebellar ataxia type 15/16
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

ITPR1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.022101134).

BP6

Variant 3-4658161-G-A is Benign according to our data. Variant chr3-4658161-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 586058.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000145 (22/152100) while in subpopulation SAS AF = 0.000415 (2/4822). AF 95% confidence interval is 0.000073. There are 0 homozygotes in GnomAd4. There are 12 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378452.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ITPR1	NM_001378452.1	MANE Select	c.1034G>A	p.Arg345Gln	missense	Exon 13 of 62	NP_001365381.1	Q14643-1
ITPR1	NM_001168272.2		c.989G>A	p.Arg330Gln	missense	Exon 12 of 61	NP_001161744.1	Q14643-2
ITPR1	NM_001099952.4		c.1034G>A	p.Arg345Gln	missense	Exon 13 of 59	NP_001093422.2	Q14643-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ITPR1	ENST00000649015.2	MANE Select	c.1034G>A	p.Arg345Gln	missense	Exon 13 of 62	ENSP00000497605.1	Q14643-1
ITPR1	ENST00000354582.12	TSL:5	c.1034G>A	p.Arg345Gln	missense	Exon 13 of 62	ENSP00000346595.8	A0A3F2YNW8
ITPR1	ENST00000648266.1		c.1034G>A	p.Arg345Gln	missense	Exon 13 of 62	ENSP00000498014.1	A0A3B3IU04

Frequencies

GnomAD3 genomes

AF:

0.000145

AC:

AN:

152100

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00404

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000165

AC:

AN:

248808

AF XY:

0.000163

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000175

Gnomad ASJ exome

AF:

0.00318

Gnomad EAS exome

AF:

0.0000557

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000890

AC:

130

AN:

1460976

Hom.:

Cov.:

AF XY:

0.0000977

AC XY:

AN XY:

726758

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.000112

AC:

AN:

44696

Ashkenazi Jewish (ASJ)

AF:

0.00360

AC:

AN:

26112

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39686

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86132

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53388

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.0000144

AC:

AN:

1111394

Other (OTH)

AF:

0.000166

AC:

AN:

60338

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000145

AC:

AN:

152100

Hom.:

Cov.:

AF XY:

0.000162

AC XY:

AN XY:

74260

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41420

American (AMR)

AF:

0.0000655

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00404

AC:

AN:

3468

East Asian (EAS)

AF:

0.000193

AC:

AN:

5170

South Asian (SAS)

AF:

0.000415

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10598

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000322

Hom.:

Bravo

AF:

0.000125

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

Autosomal dominant cerebellar ataxia (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Benign

-0.16

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.74

Eigen

Benign

-0.045

Eigen_PC

Benign

0.071

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.032

MetaRNN

Benign

0.022

MetaSVM

Uncertain

-0.20

MutationAssessor

Benign

1.4

PhyloP100

2.6

PrimateAI

Benign

0.44

PROVEAN

Benign

-1.9

REVEL

Uncertain

0.36

Sift

Benign

0.11

Sift4G

Benign

0.11

Polyphen

0.031

Vest4

0.17

MVP

0.87

MPC

0.84

ClinPred

0.045

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.095

gMVP

0.44

Mutation Taster

=76/24

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over