rs1057524809
Variant summary
Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PP2PP3_ModerateBS2
The NM_005359.6(SMAD4):c.155A>T(p.Asp52Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,686 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 Uncertain significance (★★).
Frequency
Consequence
NM_005359.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -1 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
SMAD4 | NM_005359.6 | c.155A>T | p.Asp52Val | missense_variant | Exon 2 of 12 | ENST00000342988.8 | NP_005350.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
SMAD4 | ENST00000342988.8 | c.155A>T | p.Asp52Val | missense_variant | Exon 2 of 12 | 5 | NM_005359.6 | ENSP00000341551.3 | ||
ENSG00000267699 | ENST00000590722.2 | n.*178A>T | non_coding_transcript_exon_variant | Exon 3 of 9 | 2 | ENSP00000465737.1 | ||||
ENSG00000267699 | ENST00000590722.2 | n.*178A>T | 3_prime_UTR_variant | Exon 3 of 9 | 2 | ENSP00000465737.1 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD4 exome AF: 0.00000684 AC: 10AN: 1461686Hom.: 0 Cov.: 32 AF XY: 0.00000550 AC XY: 4AN XY: 727160
GnomAD4 genome Cov.: 33
ClinVar
Submissions by phenotype
SMAD4-related disorder Uncertain:1
The SMAD4 c.155A>T variant is predicted to result in the amino acid substitution p.Asp52Val. To our knowledge, this variant has not been reported in the literature or in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare, and is interpreted as a variant of uncertain significance in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/393140/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
not provided Uncertain:1
Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 15235019, 18823382, 22992590) -
Hereditary cancer-predisposing syndrome;C4707243:Familial thoracic aortic aneurysm and aortic dissection Uncertain:1
The p.D52V variant (also known as c.155A>T), located in coding exon 1 of the SMAD4 gene, results from an A to T substitution at nucleotide position 155. The aspartic acid at codon 52 is replaced by valine, an amino acid with highly dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Carcinoma of pancreas;C0345893:Juvenile polyposis syndrome;C0796081:Myhre syndrome;C1832942:Juvenile polyposis/hereditary hemorrhagic telangiectasia syndrome Uncertain:1
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Hereditary cancer-predisposing syndrome Uncertain:1
This missense variant replaces aspartic acid with valine at codon 52 of the SMAD4 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with SMAD4-related disorders in the literature. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Juvenile polyposis/hereditary hemorrhagic telangiectasia syndrome Uncertain:1
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Juvenile polyposis syndrome Uncertain:1
This sequence change replaces aspartic acid, which is acidic and polar, with valine, which is neutral and non-polar, at codon 52 of the SMAD4 protein (p.Asp52Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SMAD4-related conditions. ClinVar contains an entry for this variant (Variation ID: 393140). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SMAD4 protein function. 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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at