rs140880290
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM1PP2BP4
The NM_005902.4(SMAD3):c.1070A>G(p.Asn357Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,614,058 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000041 ( 0 hom. )
Consequence
SMAD3
NM_005902.4 missense
NM_005902.4 missense
Scores
3
6
10
Clinical Significance
Conservation
PhyloP100: 9.11
Genes affected
SMAD3 (HGNC:6769): (SMAD family member 3) The SMAD family of proteins are a group of intracellular signal transducer proteins similar to the gene products of the Drosophila gene 'mothers against decapentaplegic' (Mad) and the C. elegans gene Sma. The SMAD3 protein functions in the transforming growth factor-beta signaling pathway, and transmits signals from the cell surface to the nucleus, regulating gene activity and cell proliferation. This protein forms a complex with other SMAD proteins and binds DNA, functioning both as a transcription factor and tumor suppressor. Mutations in this gene are associated with aneurysms-osteoarthritis syndrome and Loeys-Dietz Syndrome 3. [provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PM1
?
In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_005902.4
PP2
?
Missense variant where missense usually causes diseases, SMAD3
BP4
?
Computational evidence support a benign effect (MetaRNN=0.3341238).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SMAD3 | NM_005902.4 | c.1070A>G | p.Asn357Ser | missense_variant | 8/9 | ENST00000327367.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SMAD3 | ENST00000327367.9 | c.1070A>G | p.Asn357Ser | missense_variant | 8/9 | 1 | NM_005902.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000263 AC: 4AN: 152172Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.00000795 AC: 2AN: 251496Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135922
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GnomAD4 exome AF: 0.00000410 AC: 6AN: 1461886Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4AN XY: 727242
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GnomAD4 genome ? AF: 0.0000263 AC: 4AN: 152172Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3AN XY: 74348
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:5Benign:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
Familial thoracic aortic aneurysm and aortic dissection Uncertain:2Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Invitae | Dec 14, 2023 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | May 21, 2020 | The p.N357S variant (also known as c.1070A>G), located in coding exon 8 of the SMAD3 gene, results from an A to G substitution at nucleotide position 1070. The asparagine at codon 357 is replaced by serine, an amino acid with highly similar 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. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Mar 20, 2023 | This missense variant replaces asparagine with serine at codon 357 of the SMAD3 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 2/251496 chromosomes 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. - |
Aneurysm-osteoarthritis syndrome Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Oct 25, 2021 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Nov 02, 2023 | This missense variant replaces asparagine with serine at codon 357 of the SMAD3 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 2/251496 chromosomes 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. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Mar 30, 2014 | p.Asn357Ser (AAC>AGC): c.1070 A>G in exon 8 of the SMAD3 gene (NM_005902.3). A variant of unknown significance has been identified in the SMAD3 gene. The N357S variant has not been published as a mutation, nor has it been reported as a benign polymorphism to our knowledge. The N357S variant was not observed with any significant frequency in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project. This substitution occurs at a position that is conserved across species. Another missense mutations in a nearby residue (A349P) has been reported in association with aneurysms-osteoarthritis syndrome, supporting the functional importance of this region of the protein. Nevertheless, the N357S variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic mutation or a rare benign variant. This variant was found in TAAD - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Benign
Dann
Uncertain
DEOGEN2
Pathogenic
D;.;T;.;.
Eigen
Benign
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D;D;D;D
M_CAP
Uncertain
D
MetaRNN
Benign
T;T;T;T;T
MetaSVM
Uncertain
D
MutationAssessor
Benign
L;.;.;.;.
MutationTaster
Benign
D;D;D;D;D
PrimateAI
Pathogenic
D
PROVEAN
Benign
N;N;N;N;N
REVEL
Uncertain
Sift
Benign
T;T;T;T;T
Sift4G
Benign
T;T;T;T;T
Polyphen
B;.;.;.;.
Vest4
MVP
MPC
ClinPred
T
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at