rs2723341
Variant summary
Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong
The NM_014249.4(NR2E3):c.119-2A>C variant causes a splice acceptor, intron change. The variant allele was found at a frequency of 0.00066 in 1,555,058 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).
Frequency
Consequence
NM_014249.4 splice_acceptor, intron
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 16 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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NR2E3 | NM_014249.4 | c.119-2A>C | splice_acceptor_variant, intron_variant | Intron 1 of 7 | ENST00000617575.5 | NP_055064.1 | ||
NR2E3 | NM_016346.4 | c.119-2A>C | splice_acceptor_variant, intron_variant | Intron 1 of 6 | NP_057430.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
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NR2E3 | ENST00000617575.5 | c.119-2A>C | splice_acceptor_variant, intron_variant | Intron 1 of 7 | 1 | NM_014249.4 | ENSP00000482504.1 | |||
NR2E3 | ENST00000621098.1 | c.119-2A>C | splice_acceptor_variant, intron_variant | Intron 1 of 6 | 1 | ENSP00000479962.1 | ||||
NR2E3 | ENST00000621736.4 | c.-146-2A>C | splice_acceptor_variant, intron_variant | Intron 3 of 9 | 2 | ENSP00000479254.1 |
Frequencies
GnomAD3 genomes AF: 0.000507 AC: 77AN: 152002Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000526 AC: 85AN: 161472Hom.: 0 AF XY: 0.000511 AC XY: 44AN XY: 86034
GnomAD4 exome AF: 0.000676 AC: 949AN: 1402938Hom.: 0 Cov.: 33 AF XY: 0.000683 AC XY: 473AN XY: 692406
GnomAD4 genome AF: 0.000506 AC: 77AN: 152120Hom.: 0 Cov.: 32 AF XY: 0.000444 AC XY: 33AN XY: 74380
ClinVar
Submissions by phenotype
not provided Pathogenic:10
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Canonical splice site variant predicted to result in a null allele in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 25079116, 29343940, 32531858, 31725702, 32552793, 32581362, 10655056, 18294254, 19718767, 25097241, 24474277, 19273793, 21364904, 26894784, 27573156, 29193891, 28771251, 29431110, 28559085, 21686439, 31130284, 31980526, 30959774, 34426522, 31589614, 32679203, 32037395, 31816670, 31877679, 35113758, 31306293, 28224992, 30324420, 23591405, 31456290, 33138239, 21217109, 15459973) -
This sequence change affects an acceptor splice site in intron 1 of the NR2E3 gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in NR2E3 are known to be pathogenic (PMID: 15459973, 27522502). This variant is present in population databases (rs2723341, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. Disruption of this splice site has been observed in individual(s) with autosomal recessive enhanced S-cone syndrome (PMID: 10655056, 24474277, 25079116). It has also been observed to segregate with disease in related individuals. This variant is also known as c.118-2A>C. ClinVar contains an entry for this variant (Variation ID: 191059). Studies have shown that disruption of this splice site alters mRNA splicing and is expected to lead to the loss of protein expression (PMID: 18294254). For these reasons, this variant has been classified as Pathogenic. -
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NR2E3: PM3:Very Strong, PVS1, PM2, PS3:Supporting -
Enhanced S-cone syndrome Pathogenic:6
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This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PVS1,PM2,PP5. -
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Retinitis pigmentosa 37 Pathogenic:5
Canonical splice site: predicted to alter splicing and result in a loss or disruption of normal protein function through protein truncation. Multiple pathogenic variants are reported in the predicted truncated region (PVS1_VS).The variant has been reported at least twice as pathogenic/likely pathogenic with clinical assertions and evidence for the classification (ClinVar ID: VCV000191059, 3billion dataset). It is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.000503, PM2_M). Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline. -
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The NR2E3 c.119-2A>C variant was identified in an individual with retinitis pigmentosa with a presumed recessive inheritance pattern. Through a review of available evidence we were able to apply the following criteria: PS3, PM2, PM3. Based on this evidence we have classified this variant as Likely Pathogenic. -
The NR2E3 variant (c.119-2A>C) identified in this patient is located in the -2 position of the splice acceptor site of intron 1 and segregated with retinitis pigmentosa in multiple families (Bandah et al. 2009, PMID 19273793; Haider et al. 2000, PMID 10655056; Beryozkin et al 2014, PMID 24474277; Wang et al 2014, PMID 25097241). Additionally, in vivo functional studies demonstrated altered splicing (PMID 18294254; Bernal et al 2008). -
PVS1,PM2 -
Retinitis pigmentosa Pathogenic:3
Clinical significance based on ACMG v2.0 -
The c.119-2A>C variant in NR2E3 was identified in an individual with Retinitis pigmentosa, via a collaborative study between the Broad Institute's Center for Mendelian Genomics and the Pierce lab (https://oculargenomics.meei.harvard.edu/labs/pierce-lab/lab-members/). Through a review of available evidence we were able to apply the following criteria: PVS1, PM2, PM3. Based on this evidence we have classified this variant as Pathogenic. If you have any questions about the classification please reach out to the Pierce Lab. -
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Enhanced S-cone syndrome;C1970163:Retinitis pigmentosa 37 Pathogenic:3
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NM_014249.2(NR2E3):c.119-2A>C is a canonical splice variant classified as pathogenic in the context of NR2E3-related disorders. c.119-2A>C has been observed in cases with relevant disease (PMID: 18294254, 15459973). Functional assessments of this variant are available in the literature (PMID: 18294254). c.119-2A>C has been observed in population frequency databases (gnomAD: NFE 0.1%). In summary, NM_014249.2(NR2E3):c.119-2A>C is a canonical splice variant in a gene where loss of function is a known mechanism of disease, is predicted to disrupt protein function, and has been observed more frequently in cases with the relevant disease than in healthy populations. Please note: this variant was assessed in the context of healthy population screening. -
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Retinal dystrophy Pathogenic:3
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NR2E3-related disorder Pathogenic:1
The NR2E3 c.119-2A>C variant occurs in a canonical splice site (acceptor) and is therefore predicted to disrupt or distort the normal gene product. Across a selection of the available literature, the c.119-2A>C variant has been reported in 56 of 232 patients with NR2E3-related disorders, including 33 homozygotes and 23 compound heterozygotes. The variant is noted to segregate with disease (Schorderet et al. 2009; Collin et al. 2011; Yzer et al. 2013; Von Alpen et al. 2015). This variant was absent from 667 controls and is reported at a frequency of 0.00070 in the European (non-Finnish) population of the Exome Aggregation Consortium. Bernal et al. (2008) demonstrated that the c.119-2A>C variant resulted in aberrant splicing producing, in addition to the normal transcript, a transcript showing skipping of exon 2 and the generation of a premature stop codon in exon 3. Based on the evidence, the c.119-2A>C variant is classified as pathogenic for NR2E3-related disorders. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -
Inborn genetic diseases Pathogenic:1
The c.119-2A>C intronic variant results from a A to C substitution two nucleotides before coding exon 2 of the NR2E3 gene. Alterations that disrupt the canonical splice site are expected to cause aberrant splicing, resulting in an abnormal protein or a transcript that is subject to nonsense-mediated mRNA decay. Based on data from the Genome Aggregation Database (gnomAD) database, the NR2E3 c.119-2A>C alteration was observed in 0.05% (97/192,798) of total alleles studied, with a frequency of 0.11% (10/8,884) in the Ashkenazi Jewish subpopulation. This alteration has been reported homozygous or compound heterozygous with a second variant in multiple unrelated patients with retinitis pigmentosa or enhanced S-cone syndrome (Haider, 2000; Bernal, 2008; Jespersgaard, 2019; De Carvalho, 2021). Expression of the c.119-2A>C mutant protein in COS7 cells and RT-PCR showed an abnormal transcript due to exon 2 skipping and the generation of a premature stop codon in exon 3 (Bernal, 2008). In silico splice site analysis predicts that this alteration will weaken the native splice acceptor site. Based on the available evidence, this alteration is classified as pathogenic. -
Goldmann-Favre syndrome Pathogenic:1
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not specified Pathogenic:1
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Color vision defect;C0271385:Horizontal nystagmus;C0854723:Retinal dystrophy;C3665347:Visual impairment Pathogenic:1
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Cone-rod dystrophy Pathogenic:1
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Ocular albinism Pathogenic:1
ACMG classification criteria: PVS1 very strong, PS3 supporting, PS4 strong, PM3 very strong, PP1 strong -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at