NM_005359.6:c.1219G>C
Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 5P and 9B. PM1PP2PP3_ModerateBP6BS1BS2
The NM_005359.6(SMAD4):āc.1219G>Cā(p.Val407Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000236 in 1,612,044 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 Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_005359.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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SMAD4 | NM_005359.6 | c.1219G>C | p.Val407Leu | missense_variant | Exon 10 of 12 | ENST00000342988.8 | NP_005350.1 | |
SMAD4 | NM_001407041.1 | c.1219G>C | p.Val407Leu | missense_variant | Exon 10 of 12 | NP_001393970.1 | ||
SMAD4 | NM_001407042.1 | c.1219G>C | p.Val407Leu | missense_variant | Exon 10 of 12 | NP_001393971.1 | ||
SMAD4 | NR_176265.1 | n.1757G>C | non_coding_transcript_exon_variant | Exon 10 of 13 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000197 AC: 3AN: 152170Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000119 AC: 3AN: 251474Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135914
GnomAD4 exome AF: 0.0000240 AC: 35AN: 1459874Hom.: 0 Cov.: 28 AF XY: 0.0000317 AC XY: 23AN XY: 726400
GnomAD4 genome AF: 0.0000197 AC: 3AN: 152170Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1AN XY: 74336
ClinVar
Submissions by phenotype
not provided Uncertain:3
The SMAD4 c.1219G>C; p.Val407Leu variant (rs147621330), to our knowledge, is not reported in the medical literature but is reported in ClinVar (Variation ID: 460530). This variant is found on only four chromosomes (4/282846 alleles) in the Genome Aggregation Database, indicating it is not a common polymorphism. The valine at codon 407 is highly conserved, and computational analyses (SIFT, PolyPhen-2) predict that this variant is deleterious. However, due to limited information, the clinical significance of the p.Val407Leu variant is uncertain at this time. -
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; Observed in an individual with prostate cancer (PMID: 34326862); This variant is associated with the following publications: (PMID: 23718828, 34326862, 17873119, 18823382, 15235019) -
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Hereditary cancer-predisposing syndrome Uncertain:2
This missense variant replaces valine with leucine at codon 407 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 been identified in 4/282846 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. -
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Juvenile polyposis/hereditary hemorrhagic telangiectasia syndrome Uncertain:2
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This missense variant replaces valine with leucine at codon 407 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 been identified in 4/282846 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. -
Carcinoma of pancreas;C0796081:Myhre syndrome;C1832942:Juvenile polyposis/hereditary hemorrhagic telangiectasia syndrome;C1868081:Generalized juvenile polyposis/juvenile polyposis coli Uncertain:1
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Hereditary cancer-predisposing syndrome;C4707243:Familial thoracic aortic aneurysm and aortic dissection Benign:1
This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Juvenile polyposis syndrome Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at