rs1553193813
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The ENST00000370225.4(ABCA4):c.1497G>A(p.Trp499Ter) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: not found (cov: 32)
Consequence
ABCA4
ENST00000370225.4 stop_gained
ENST00000370225.4 stop_gained
Scores
4
2
1
Clinical Significance
Conservation
PhyloP100: 7.52
Genes affected
ABCA4 (HGNC:34): (ATP binding cassette subfamily A member 4) The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intracellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the ABC1 subfamily. Members of the ABC1 subfamily comprise the only major ABC subfamily found exclusively in multicellular eukaryotes. This protein is a retina-specific ABC transporter with N-retinylidene-PE as a substrate. It is expressed exclusively in retina photoreceptor cells, and the gene product mediates transport of an essental molecule, all-trans-retinal aldehyde (atRAL), across the photoreceptor cell membrane. Mutations in this gene are found in patients diagnosed with Stargardt disease, a form of juvenile-onset macular degeneration. Mutations in this gene are also associated with retinitis pigmentosa-19, cone-rod dystrophy type 3, early-onset severe retinal dystrophy, fundus flavimaculatus, and macular degeneration age-related 2. [provided by RefSeq, Sep 2019]
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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 1-94077747-C-T is Pathogenic according to our data. Variant chr1-94077747-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 438087.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-94077747-C-T is described in Lovd as [Pathogenic]. Variant chr1-94077747-C-T is described in Lovd as [Likely_pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
ABCA4 | NM_000350.3 | c.1497G>A | p.Trp499Ter | stop_gained | 11/50 | ENST00000370225.4 | NP_000341.2 | |
LOC124904222 | XR_007066231.1 | n.203-5982C>T | intron_variant, non_coding_transcript_variant | |||||
ABCA4 | XM_047416704.1 | c.1497G>A | p.Trp499Ter | stop_gained | 11/49 | XP_047272660.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
ABCA4 | ENST00000370225.4 | c.1497G>A | p.Trp499Ter | stop_gained | 11/50 | 1 | NM_000350.3 | ENSP00000359245 | P1 | |
ABCA4 | ENST00000649773.1 | c.1497G>A | p.Trp499Ter | stop_gained | 11/19 | ENSP00000496882 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:4
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Sep 25, 2020 | For these reasons, this variant has been classified as Pathogenic. Loss-of-function variants in ABCA4 are known to be pathogenic (PMID: 10958761, 24938718, 25312043, 26780318). This variant has been observed in individual(s) with inherited retinal dystrophy (PMID: 28041643). ClinVar contains an entry for this variant (Variation ID: 438087). This variant is not present in population databases (ExAC no frequency). This sequence change creates a premature translational stop signal (p.Trp499*) in the ABCA4 gene. It is expected to result in an absent or disrupted protein product. - |
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Mar 24, 2023 | 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; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 32581362, 28041643) - |
Cone-rod dystrophy 3 Pathogenic:1
Pathogenic, no assertion criteria provided | clinical testing | Bioscientia Institut fuer Medizinische Diagnostik GmbH, Sonic Healthcare | Apr 20, 2017 | - - |
Retinal dystrophy Pathogenic:1
Likely pathogenic, no assertion criteria provided | research | NIHR Bioresource Rare Diseases, University of Cambridge | Jan 01, 2015 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
MutationTaster
Benign
A;A
Vest4
GERP RS
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at