rs958818801
Variant summary
Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1
The NM_005585.5(SMAD6):c.465_471del(p.Gly156ValfsTer23) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000141 in 1,346,942 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. P152P) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_005585.5 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 8 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SMAD6 | NM_005585.5 | c.465_471del | p.Gly156ValfsTer23 | frameshift_variant | 1/4 | ENST00000288840.10 | |
SMAD6 | NR_027654.2 | n.1488_1494del | non_coding_transcript_exon_variant | 1/5 | |||
SMAD6 | XR_931827.3 | n.1488_1494del | non_coding_transcript_exon_variant | 1/4 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SMAD6 | ENST00000288840.10 | c.465_471del | p.Gly156ValfsTer23 | frameshift_variant | 1/4 | 1 | NM_005585.5 | P1 | |
SMAD6 | ENST00000557916.5 | c.465_471del | p.Gly156ValfsTer23 | frameshift_variant, NMD_transcript_variant | 1/5 | 1 | |||
SMAD6 | ENST00000612349.1 | n.647_653del | non_coding_transcript_exon_variant | 1/1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000133 AC: 2AN: 150106Hom.: 0 Cov.: 32
GnomAD4 exome AF: 0.0000142 AC: 17AN: 1196836Hom.: 0 AF XY: 0.00000683 AC XY: 4AN XY: 585938
GnomAD4 genome ? AF: 0.0000133 AC: 2AN: 150106Hom.: 0 Cov.: 32 AF XY: 0.0000273 AC XY: 2AN XY: 73216
ClinVar
Submissions by phenotype
Craniosynostosis syndrome Pathogenic:1
Pathogenic, no assertion criteria provided | literature only | Yale Center for Mendelian Genomics, Yale University | Jan 01, 2018 | - - |
Radioulnar synostosis Uncertain:1
Uncertain significance, no assertion criteria provided | case-control | The Laboratory of Genetics and Metabolism, Hunan Children’s Hospital | May 14, 2019 | PVS1, PM2, PP4, BS4 - |
Aortic valve disease 2 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jul 15, 2019 | 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. The current clinical and genetic evidence is not sufficient to establish whether loss-of-function variants in SMAD6 cause disease. This variant has been observed in an individual affected with sagittal craniosynostosis as well as his unaffected parent. In addition, the affected individual had a de novo variant in another gene related to craniosynostosis, indicating that the SMAD6 variant was not the primary cause of disease (PMID: 28808027). This variant has also been observed in an individual with bicuspid aortic valve associated thoracic aortic aneurysm (PMID: 28659821). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This sequence change creates a premature translational stop signal (p.Gly156Valfs*23) in the SMAD6 gene. It is expected to result in an absent or disrupted protein product. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Jun 15, 2022 | Reported in a patient with craniosynostosis who also harbored an additional potentially disease-causing variant in the TCF12 gene (Timberlake et al., 2017); Not observed at significant frequency in large population cohorts (gnomAD); Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene or region of a gene for which loss of function is not a well-established mechanism of disease.; This variant is associated with the following publications: (PMID: 28659821, 30038786, 31138930, 28808027) - |
Radioulnar synostosis, nonsyndromic, susceptibility to Other:1
risk factor, no assertion criteria provided | literature only | OMIM | Aug 28, 2020 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at