rs61752401
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1_ModeratePM2PP3_StrongPP5_Moderate
The NM_000350.3(ABCA4):c.1937+1G>C variant causes a splice donor change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★).
Frequency
Genomes: not found (cov: 32)
Consequence
ABCA4
NM_000350.3 splice_donor
NM_000350.3 splice_donor
Scores
4
2
1
Splicing: ADA: 1.000
2
Clinical Significance
Conservation
PhyloP100: 6.17
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]
Genome browser will be placed here
ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 10 ACMG points.
PVS1
?
Splicing variant, NOT destroyed by nmd, known LOF gene, truncates exone, which is 0.025798885 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
PP5
?
Variant 1-94062576-C-G is Pathogenic according to our data. Variant chr1-94062576-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 2733938.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-94062576-C-G is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
ABCA4 | NM_000350.3 | c.1937+1G>C | splice_donor_variant | ENST00000370225.4 | |||
ABCA4 | XM_047416704.1 | c.1937+1G>C | splice_donor_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
ABCA4 | ENST00000370225.4 | c.1937+1G>C | splice_donor_variant | 1 | NM_000350.3 | P1 | |||
ABCA4 | ENST00000649773.1 | c.1937+1G>C | splice_donor_variant |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 37
GnomAD4 exome
Cov.:
37
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
Bravo
AF:
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Nov 06, 2022 | For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. Disruption of this splice site has been observed in individual(s) with Stargardt disease (PMID: 24011517). This variant is not present in population databases (gnomAD no frequency). This sequence change affects a donor splice site in intron 13 of the ABCA4 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 ABCA4 are known to be pathogenic (PMID: 10958761, 24938718, 25312043, 26780318). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Uncertain
D
MutationTaster
Benign
D;D
GERP RS
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DL_spliceai
Position offset: 1
Find out detailed SpliceAI scores and Pangolin per-transcript scores at