rs1341783002
Variant summary
Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1PM2PP3_Strong
The NM_001387283.1(SMARCA4):c.5007+1G>A variant causes a splice donor change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000129 in 1,550,668 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 Uncertain significance (★★).
Frequency
Consequence
NM_001387283.1 splice_donor
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 14 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SMARCA4 | NM_001387283.1 | c.5007+1G>A | splice_donor_variant | ENST00000646693.2 | |||
SMARCA4 | NM_003072.5 | c.4911+1G>A | splice_donor_variant | ENST00000344626.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SMARCA4 | ENST00000344626.10 | c.4911+1G>A | splice_donor_variant | 1 | NM_003072.5 | P4 | |||
SMARCA4 | ENST00000646693.2 | c.5007+1G>A | splice_donor_variant | NM_001387283.1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152244Hom.: 0 Cov.: 33
GnomAD3 exomes AF: 0.00000646 AC: 1AN: 154804Hom.: 0 AF XY: 0.0000122 AC XY: 1AN XY: 81674
GnomAD4 exome AF: 7.15e-7 AC: 1AN: 1398424Hom.: 0 Cov.: 33 AF XY: 0.00000145 AC XY: 1AN XY: 689726
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152244Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0AN XY: 74382
ClinVar
Submissions by phenotype
Rhabdoid tumor predisposition syndrome 2 Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Sep 12, 2023 | This sequence change affects a donor splice site in intron 35 of the SMARCA4 gene. RNA analysis indicates that disruption of this splice site induces altered splicing and likely disrupts the C-terminus of the protein. This variant is present in population databases (no rsID available, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with SMARCA4-related conditions. ClinVar contains an entry for this variant (Variation ID: 480606). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Studies have shown that disruption of this splice site results in activation of a cryptic splice site and introduces a new termination codon (Invitae). However the mRNA is not expected to undergo nonsense-mediated decay. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Feb 16, 2024 | - - |
Intellectual disability, autosomal dominant 16 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Jul 15, 2021 | - - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 09, 2024 | The c.5007+1G>A intronic variant results from a G to A substitution one nucleotide after coding exon 34 of the SMARCA4 gene. This nucleotide position is highly conserved in available vertebrate species. In silico splice site analysis predicts that this alteration will weaken the native splice donor site. RNA studies have demonstrated that this alteration results in abnormal splicing in the set of samples tested (Ambry internal data). However, this abnormal splice event occurs at the 3' terminus of theSMARCA4 gene, is not expected to trigger nonsense-mediated mRNAdecay, impacts the final 10 amino acids of the native protein sequence, and results in the elongation of the protein by 57 amino acids. The exact functional effect of the altered amino acids is unknown. This variant has been detected in multiple individuals with no reported features of Coffin-Siris syndrome (Ambry internal data). Based on the supporting evidence, the association of this alteration with rhabdoid tumor predisposition syndrome is unknown; however, the association of this alteration with Coffin-Siris syndrome is unlikely. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at