rs201153410

Positions:

chr2-233328542-C-T

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_000541.5(SAG):c.577C>T(p.Arg193*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000169 in 1,613,944 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 (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

SAG
NM_000541.5 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:12

Conservation

PhyloP100: -0.480

Variant links:

Genes affected

SAG (HGNC:10521): (S-antigen visual arrestin) Members of arrestin/beta-arrestin protein family are thought to participate in agonist-mediated desensitization of G-protein-coupled receptors and cause specific dampening of cellular responses to stimuli such as hormones, neurotransmitters, or sensory signals. S-arrestin, also known as S-antigen, is a major soluble photoreceptor protein that is involved in desensitization of the photoactivated transduction cascade. It is expressed in the retina and the pineal gland and inhibits coupling of rhodopsin to transducin in vitro. Additionally, S-arrestin is highly antigenic, and is capable of inducing experimental autoimmune uveoretinitis. Mutations in this gene have been associated with Oguchi disease, a rare autosomal recessive form of night blindness. [provided by RefSeq, Jul 2008]

SAG links:

SAG (HGNC:):

SAG links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 2-233328542-C-T is Pathogenic according to our data. Variant chr2-233328542-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 41895.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-233328542-C-T is described in Lovd as [Pathogenic]. Variant chr2-233328542-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SAG	NM_000541.5 linkuse as main transcript	c.577C>T	p.Arg193*	stop_gained	8/16	ENST00000409110.6	NP_000532.2	P10523

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SAG	ENST00000409110.6 linkuse as main transcript	c.577C>T	p.Arg193*	stop_gained	8/16	5	NM_000541.5	ENSP00000386444.1		P10523

Frequencies

GnomAD3 genomes

AF:

0.000197

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

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:

0.000279

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000132

AC:

AN:

249074

Hom.:

AF XY:

0.000111

AC XY:

AN XY:

135116

show subpopulations

Gnomad AFR exome

AF:

0.0000646

Gnomad AMR exome

AF:

0.000319

Gnomad ASJ exome

AF:

0.000199

Gnomad EAS exome

AF:

0.0000556

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000124

Gnomad OTH exome

AF:

0.000497

GnomAD4 exome

AF:

0.000166

AC:

243

AN:

1461636

Hom.:

Cov.:

AF XY:

0.000164

AC XY:

119

AN XY:

727110

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000492

Gnomad4 ASJ exome

AF:

0.000306

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000812

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000179

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.000197

AC:

AN:

152308

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.000392

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000279

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000292

Hom.:

Bravo

AF:

0.000230

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000360

AC:

ExAC

AF:

0.000141

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:4

Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 27, 2023	This sequence change creates a premature translational stop signal (p.Arg193*) in the SAG gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SAG are known to be pathogenic (PMID: 9452120, 15234147, 22665972). This variant is present in population databases (rs201153410, gnomAD 0.04%). This premature translational stop signal has been observed in individual(s) with Oguchi disease (PMID: 9452120, 22419846). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 41895). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Aug 19, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Nov 01, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Sep 20, 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; Observed with a deletion variant on the opposite allele (in trans) in a patient with Oguchi disease in published literature (Huang et al., 2012); This variant is associated with the following publications: (PMID: 15295660, 24265693, 25525159, 9452120, 25307992, 22419846, 21922265, 21151602, 17070587, 31054281, 31980526, 31589614) -

Oguchi disease-1

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Victorian Clinical Genetics Services, Murdoch Childrens Research Institute	Feb 02, 2022	Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as Pathogenic. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with Oguchi disease-1 (MIM#258100) and retinitis pigmentosa 47 (MIM#613758). (I) 0106 - This gene is associated with autosomal recessive disease. Autosomal dominant retinitis pigmentosa has also been reported as a founder mutation (PMID: 33047631). (I) 0201 - Variant is predicted to cause nonsense-mediated decay (NMD) and loss of protein (premature termination codon is located at least 54 nucleotides upstream of the final exon-exon junction). (SP) 0251 - This variant is heterozygous. (I) 0304 - Variant is present in gnomAD (v2) <0.01 for a recessive condition (42 heterozygotes, 0 homozygotes). (SP) 0702 - Other NMD predicted variants comparable to the one identified in this case have strong previous evidence for pathogenicity (ClinVar). (SP) 0801 - This variant has strong previous evidence of pathogenicity in unrelated individuals. This variant has been reported in both homozygous and compound heterozygous state in individuals with Oguchi disease (ClinVar, PMID: 9452120, 22419846). It has also been reported in individuals with retinitis pigmentosa (PMID: 21151602). (SP) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -
Pathogenic, criteria provided, single submitter	clinical testing	Genetics Department, Catlab	Sep 20, 2024	The c.577C>T nonsense variant in the SAG gene is a loss of function variant predicted to undergo nonsense mediated decay and loss of function variants have been described as a causing mechanism for the gene (PVS1). It has been previously reported in homozygous or compound heterozygous state in patients with Oguchi disease (PMID: 22419846, 9452120, 21151602) (PM3) and it has a low frequency in gnomAD 4.1 (AF=0.01%) (PM2). With all the available evidence, the variant is classified as pathogenic. -

Retinal dystrophy

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Blueprint Genetics	Jul 30, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg	Jan 01, 2021	- -

Oguchi disease-2

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Medical Molecular Genetics Department, National Research Center

Dec 01, 2019

- -

Retinitis pigmentosa 47;C4551824:Oguchi disease-1

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Nov 05, 2021

- -

Retinitis pigmentosa 47

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Institute of Human Genetics, University of Leipzig Medical Center

Mar 15, 2023

This variant was identified as compound heterozygous with NM_000541.5:c.733G>A._x000D_ Criteria applied: PVS1, PM2_SUP, PM3_SUP -

Oguchi disease

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 1998

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

DANN

Uncertain

0.99

Eigen

Benign

0.072

Eigen_PC

Benign

-0.29

FATHMM_MKL

Benign

0.045

Vest4

0.96

GERP RS

1.6

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