rs61755771

Positions:

chr6-42722199-G-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000322.5(PRPH2):c.136C>T(p.Arg46*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,614,002 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 Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

PRPH2
NM_000322.5 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:14O:1

Conservation

PhyloP100: 2.15

Variant links:

Genes affected

PRPH2 (HGNC:9942): (peripherin 2) The protein encoded by this gene is a member of the transmembrane 4 superfamily, also known as the tetraspanin family. Most of these members are cell-surface proteins that are characterized by the presence of four hydrophobic domains. The proteins mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility. This encoded protein is a cell surface glycoprotein found in the outer segment of both rod and cone photoreceptor cells. It may function as an adhesion molecule involved in stabilization and compaction of outer segment disks or in the maintenance of the curvature of the rim. This protein is essential for disk morphogenesis. Defects in this gene are associated with both central and peripheral retinal degenerations. Some of the various phenotypically different disorders are autosomal dominant retinitis pigmentosa, progressive macular degeneration, macular dystrophy and retinitis pigmentosa digenic. [provided by RefSeq, Jul 2008]

PRPH2 links:

PRPH2 (HGNC:):

PRPH2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 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 6-42722199-G-A is Pathogenic according to our data. Variant chr6-42722199-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 13179.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-42722199-G-A is described in Lovd as [Pathogenic]. Variant chr6-42722199-G-A is described in Lovd as [Pathogenic]. Variant chr6-42722199-G-A is described in Lovd as [Likely_pathogenic]. Variant chr6-42722199-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRPH2	NM_000322.5 linkuse as main transcript	c.136C>T	p.Arg46*	stop_gained	1/3	ENST00000230381.7	NP_000313.2	P23942
PRPH2	XR_007059288.1 linkuse as main transcript	n.399C>T		non_coding_transcript_exon_variant	1/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PRPH2	ENST00000230381.7 linkuse as main transcript	c.136C>T	p.Arg46*	stop_gained	1/3	1	NM_000322.5	ENSP00000230381.5		P23942

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152112

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251390

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135894

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461890

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.0000374

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152112

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74292

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000290

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:14Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Patterned macular dystrophy 1

Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	MGZ Medical Genetics Center	Jan 25, 2022	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Human Genetics, University of Leipzig Medical Center	Mar 06, 2023	_x000D_ Criteria applied: PVS1, PS4 -

Retinal dystrophy

Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg	Jan 01, 2023	- -
Pathogenic, criteria provided, single submitter	clinical testing	Blueprint Genetics	Sep 21, 2018	- -
Pathogenic, criteria provided, single submitter	research	Dept Of Ophthalmology, Nagoya University	Oct 01, 2023	- -

not provided

Pathogenic:2Other:1

not provided, no classification provided	literature only	Retina International	-	- -
Pathogenic, no assertion criteria provided	curation	Leiden Open Variation Database	Apr 29, 2021	Curator: Global Variome, with Curator vacancy. Submitters to LOVD: Julia Lopez, LOVD, Manon Peeters, Yoshito Koyanagi. Comment: Variant observed de novo. -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	May 05, 2021	Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 32660024, 28559085, 29343940, 29555955, 25447119, 7880786, 11139241, 8111389, 26061163, 25412400, 7825692, 20213611, 28129423, 32531846, 23105016) -

Stargardt disease

Pathogenic:2

Pathogenic, no assertion criteria provided	research	Ophthalmo-Genetics Lab, Instituto de Oftalmologia Conde de Valenciana	Dec 13, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	NEI Ophthalmic Genomics Laboratory, National Institutes of Health	Jan 07, 2020	The variant NM_000322.4:c.136C>T in the PRPH2 gene has been previously studied (PMIDs 8111389, 20213611, 23105016, 25412400, 25412400, 28559085, 29555955, 29343940). We found this variant in 2 patient(s) in a PRPH2 cohort study (Reeves et al. 2020). This variant is listed in dbSNP and/or HGMD (rs61755771,CM930635). It is present in gnomAD browser (AF 0.0000163). It is enriched in the PRPH2 disease cohort. We invoked ACMG criteria [PVS1, PS4, PM2, PP1-M, PP5] and classified NM_000322.4:c.136C>T in the PRPH2 gene as a Pathogenic mutation. -

Patterned dystrophy of the retinal pigment epithelium

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

NEI Ophthalmic Genomics Laboratory, National Institutes of Health

Jan 07, 2020

The variant NM_000322.4:c.136C>T in the PRPH2 gene has been previously studied (PMIDs 8111389, 20213611, 23105016, 25412400, 25412400, 28559085, 29555955, 29343940). We found this variant in 2 patient(s) in a PRPH2 cohort study (Reeves et al. 2020). This variant is listed in dbSNP and/or HGMD (rs61755771,CM930635). It is present in gnomAD browser (AF 0.0000163). It is enriched in the PRPH2 disease cohort. We invoked ACMG criteria [PVS1, PS4, PM2, PP1-M, PP5] and classified NM_000322.4:c.136C>T in the PRPH2 gene as a Pathogenic mutation. -

Retinitis pigmentosa 7

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 1995

- -

Choroidal dystrophy, central areolar 2

Pathogenic:1

Pathogenic, criteria provided, single submitter

research

Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center

Mar 17, 2024

- -

PRPH2-related disorder

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 02, 2024

This sequence change creates a premature translational stop signal (p.Arg46*) in the PRPH2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in PRPH2 are known to be pathogenic (PMID: 8111389, 8485575, 8485576, 8675410, 16916875, 17504850, 22863181, 25675413, 26061163, 27365499, 29555955, 33546218). This variant is present in population databases (rs61755771, gnomAD 0.009%). This premature translational stop signal has been observed in individuals with autosomal dominant retinitis pigmentosa (adRP), macular dystrophy, or cone-rod dystrophy (PMID: 7880786, 8111389, 25447119, 28559085, 29555955). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 13179). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.50

BayesDel_noAF

Pathogenic

0.56

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.55

FATHMM_MKL

Uncertain

0.87

Vest4

0.83

GERP RS

3.6

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