rs187516662

Variant names:

• chr3-4675196-G-A
• rs187516662
• NM_001378452.1:c.2727G>A

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 0P and 15B. BP4_Moderate BP6_Very_Strong BP7 BS1

The NM_001378452.1(ITPR1):​c.2727G>A​(p.Lys909Lys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000234 in 1,612,742 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00025 (0 hom.)
• Consequence: ITPR1 NM_001378452.1 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: 3.05
• Publications: 1 publications found

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: Ambry Genetics, G2P, Genomics England PanelApp, PanelApp Australia, Labcorp Genetics (formerly Invitae), Orphanet, ClinGen
• spinocerebellar ataxia type 29

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Orphanet
• spinocerebellar ataxia type 15/16

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -15 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.37).
• BP6: Variant 3-4675196-G-A is Benign according to our data. Variant chr3-4675196-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 586045.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=3.05 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000131 (20/152310) while in subpopulation NFE AF = 0.000176 (12/68038). AF 95% confidence interval is 0.000102. There are 0 homozygotes in GnomAd4. There are 9 alleles in the male GnomAd4 subpopulation. Median coverage is 32. 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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITPR1	NM_001378452.1	MANE Select	c.2727G>A	p.Lys909Lys	synonymous	Exon 23 of 62	NP_001365381.1
	ITPR1	NM_001168272.2		c.2682G>A	p.Lys894Lys	synonymous	Exon 22 of 61	NP_001161744.1
	ITPR1	NM_001099952.4		c.2727G>A	p.Lys909Lys	synonymous	Exon 23 of 59	NP_001093422.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITPR1	ENST00000649015.2	MANE Select	c.2727G>A	p.Lys909Lys	synonymous	Exon 23 of 62	ENSP00000497605.1
	ITPR1	ENST00000354582.12	TSL:5	c.2727G>A	p.Lys909Lys	synonymous	Exon 23 of 62	ENSP00000346595.8
	ITPR1	ENST00000648266.1		c.2727G>A	p.Lys909Lys	synonymous	Exon 23 of 62	ENSP00000498014.1

Frequencies

GnomAD3 genomes AF: 0.000131 AC: 20 AN: 152192 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000169

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000943

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000176

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000274 AC: 68 AN: 247732 AF XY: 0.000238

Gnomad AFR exome AF: 0.000129

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000559

Gnomad OTH exome AF: 0.000500

GnomAD4 exome AF: 0.000245 AC: 358 AN: 1460432 Hom.: 0 Cov.: 30 AF XY: 0.000224 AC XY: 163 AN XY: 726432

African (AFR) AF: 0.0000598 AC: 2 AN: 33424

American (AMR) AF: 0.00 AC: 0 AN: 44500

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26116

East Asian (EAS) AF: 0.00 AC: 0 AN: 39660

South Asian (SAS) AF: 0.00 AC: 0 AN: 85898

European-Finnish (FIN) AF: 0.0000562 AC: 3 AN: 53380

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.000302 AC: 336 AN: 1111360

Other (OTH) AF: 0.000282 AC: 17 AN: 60328

GnomAD4 genome AF: 0.000131 AC: 20 AN: 152310 Hom.: 0 Cov.: 32 AF XY: 0.000121 AC XY: 9 AN XY: 74470

African (AFR) AF: 0.000168 AC: 7 AN: 41558

American (AMR) AF: 0.00 AC: 0 AN: 15308

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.0000943 AC: 1 AN: 10610

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000176 AC: 12 AN: 68038

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.000259 Hom.: 0

Bravo AF: 0.000113

EpiCase AF: 0.000327

EpiControl AF: 0.000178

ClinVar

ClinVar submissions as Germline

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	3	not provided (3)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.37
CADD	Benign	11
DANN	Benign	0.70
PhyloP100		3.1
PromoterAI		-0.034	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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: rs187516662; hg19: chr3-4716880;