rs180177321

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1_StrongPM2PP5_Very_Strong

The NM_012203.2(GRHPR):c.864_865del(p.Val289AspfsTer22) variant causes a frameshift, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000149 in 1,613,832 control chromosomes in the GnomAD database, with no homozygous occurrence. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (★★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

GRHPR
NM_012203.2 frameshift, splice_region

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:9

Conservation

PhyloP100: 9.85

Variant links:

Genes affected

GRHPR (HGNC:4570): (glyoxylate and hydroxypyruvate reductase) This gene encodes an enzyme with hydroxypyruvate reductase, glyoxylate reductase, and D-glycerate dehydrogenase enzymatic activities. The enzyme has widespread tissue expression and has a role in metabolism. Type II hyperoxaluria is caused by mutations in this gene. [provided by RefSeq, Jul 2008]

GRHPR links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. There are 15 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 9-37432134-CTG-C is Pathogenic according to our data. Variant chr9-37432134-CTG-C is described in ClinVar as [Pathogenic]. Clinvar id is 162020.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GRHPR	NM_012203.2 linkuse as main transcript	c.864_865del	p.Val289AspfsTer22	frameshift_variant, splice_region_variant	8/9	ENST00000318158.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GRHPR	ENST00000318158.11 linkuse as main transcript	c.864_865del	p.Val289AspfsTer22	frameshift_variant, splice_region_variant	8/9	1	NM_012203.2	P1	Q9UBQ7-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000962

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000398

AC:

AN:

251436

Hom.:

AF XY:

0.0000515

AC XY:

AN XY:

135904

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000489

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000123

AC:

AN:

1461644

Hom.:

AF XY:

0.0000138

AC XY:

AN XY:

727142

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000403

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000962

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000453

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Primary hyperoxaluria, type II

Pathogenic:7

Pathogenic, no assertion criteria provided	literature only	OMIM	Oct 01, 2014	- -
Pathogenic, criteria provided, single submitter	clinical testing	Rare Kidney Stone Consortium and the Mayo Clinic Hyperoxaluria Center, Mayo Clinic	Oct 27, 2023	ACMG:PVS1 PM2 PM3 PP4 -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Jan 14, 2022	- -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Mar 10, 2021	- -
Pathogenic, no assertion criteria provided	research	Clinical Biochemistry Laboratory, Health Services Laboratory	Nov 27, 2014	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Oct 31, 2023	- -
Likely pathogenic, no assertion criteria provided	clinical testing	Counsyl	Jan 25, 2017	- -

Primary hyperoxaluria

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jun 17, 2016

Variant summary: The GRHPR c.864_865delTG (p.Val289Aspfs) variant results in a premature termination codon, predicted to cause a truncated or absent GRHPR protein due to nonsense mediated decay, which are commonly known mechanisms for disease. This variant was found in 3/121702 control chromosomes at a frequency of 0.0000247, which does not exceed the estimated maximal expected allele frequency of a pathogenic GRHPR variant (0.0014434). It was only found in East Asian population in which allele frequency was 0.033% (3/9124 chromosomes). This variant has been reported in five PH2 patients of East Asian origin including four patients who carried this variant in homozygous state (Takayama_2014). The authors recommend that this mutation, particularly in patients of East Asian origin, should be screened when PH2 is suspected. Multiple labs/reputable databases classify this variant as pathogenic. Taken together, this variant is classified as Pathogenic. -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Nov 17, 2023

This sequence change creates a premature translational stop signal (p.Val289Aspfs*22) in the GRHPR gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 40 amino acid(s) of the GRHPR protein. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This premature translational stop signal has been observed in individual(s) with primary hyperoxaluria type 2 (PMID: 11728965, 24116921). This variant is also known as 862delTG. ClinVar contains an entry for this variant (Variation ID: 162020). This variant disrupts the p.Arg302 amino acid residue in GRHPR. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 14635115, 24116921). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over