rs150022335
Variant summary
Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2
The NM_003242.6(TGFBR2):c.617C>T(p.Thr206Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000551 in 1,614,198 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_003242.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -9 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
TGFBR2 | ENST00000295754.10 | c.617C>T | p.Thr206Met | missense_variant | Exon 4 of 7 | 1 | NM_003242.6 | ENSP00000295754.5 | ||
TGFBR2 | ENST00000359013.4 | c.692C>T | p.Thr231Met | missense_variant | Exon 5 of 8 | 1 | ENSP00000351905.4 | |||
TGFBR2 | ENST00000672866.1 | n.2213C>T | non_coding_transcript_exon_variant | Exon 4 of 7 |
Frequencies
GnomAD3 genomes AF: 0.0000526 AC: 8AN: 152202Hom.: 0 Cov.: 33
GnomAD3 exomes AF: 0.0000398 AC: 10AN: 251142Hom.: 0 AF XY: 0.0000368 AC XY: 5AN XY: 135714
GnomAD4 exome AF: 0.0000554 AC: 81AN: 1461878Hom.: 0 Cov.: 34 AF XY: 0.0000550 AC XY: 40AN XY: 727240
GnomAD4 genome AF: 0.0000525 AC: 8AN: 152320Hom.: 0 Cov.: 33 AF XY: 0.0000537 AC XY: 4AN XY: 74478
ClinVar
Submissions by phenotype
Familial thoracic aortic aneurysm and aortic dissection Uncertain:3
The p.T206M variant (also known as c.617C>T), located in coding exon 4 of the TGFBR2 gene, results from a C to T substitution at nucleotide position 617. The threonine at codon 206 is replaced by methionine, an amino acid with similar properties. This alteration has been reported in aortic dissection, aortic aneurysm, and Loeys-Dietz syndrome cohorts (Sakai H et al. Hum Genet, 2012 Apr;131:591-9; Li Z et al. Sci China Life Sci, 2018 Dec;61:1545-1553; Yang H et al. Orphanet J Rare Dis, 2020 Jan;15:6). This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this alteration remains unclear. -
This variant replaces threonine with methionine at codon 206 in the TGFBR2 protein. This variant is also known as c.692C>T, p.Thr231Met based on a different transcript NM_001024847.2. Computational prediction suggests that this variant may not impact protein structure and function. To our knowledge, functional studies have not been reported for this variant. This variant has been reported in two individuals affected with aortic aneurysm and dissection (PMID: 22001912, 30341550) and in one individual suspected of having Loeys-Dietz syndrome (PMID: 31915033). This variant has also been identified in 12/282550 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. -
This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 206 of the TGFBR2 protein (p.Thr206Met). This variant is present in population databases (rs150022335, gnomAD 0.03%). This missense change has been observed in individual(s) with clinical features of TGFBR2-related conditions (PMID: 22001912, 30341550, 31915033, 34498425; internal data). This variant is also known as c.692C>T (p.Thr231Met). ClinVar contains an entry for this variant (Variation ID: 44659). Invitae Evidence Modeling incorporating data from in vitro experimental studies (internal data) indicates that this missense variant is not expected to disrupt TGFBR2 function with a negative predictive value of 95%. 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. -
not provided Uncertain:2
TGFBR2: PM2:Supporting, BP4 -
In silico analysis indicates that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 30341550, 34498425, 31915033, 22001912, 31786580) -
not specified Uncertain:1Benign:1
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Variant classified as Uncertain Significance - Favor Pathogenic. -
Loeys-Dietz syndrome 2 Uncertain:1
This variant is located in the TGFBR2 protein. This variant is also known as c.692C>T, p.Thr231Met based on a different transcript NM_001024847.2. 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 been reported in two individuals affected with aortic aneurysm and dissection (PMID: 22001912, 30341550) and in one individual suspected of having Loeys-Dietz syndrome (PMID: 31915033). This variant has also been identified in 12/282550 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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at