chr1-218434118-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 5P and 4B. PP3_StrongPP5BS2

The NM_003238.6(TGFB2):c.547C>T(p.Arg183Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,614,040 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). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R183H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

TGFB2
NM_003238.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:2

Conservation

PhyloP100: 7.52

Variant links:

Genes affected

TGFB2 (HGNC:11768): (transforming growth factor beta 2) This gene encodes a secreted ligand of the TGF-beta (transforming growth factor-beta) superfamily of proteins. Ligands of this family bind various TGF-beta receptors leading to recruitment and activation of SMAD family transcription factors that regulate gene expression. The encoded preproprotein is proteolytically processed to generate a latency-associated peptide (LAP) and a mature peptide, and is found in either a latent form composed of a mature peptide homodimer, a LAP homodimer, and a latent TGF-beta binding protein, or in an active form consisting solely of the mature peptide homodimer. The mature peptide may also form heterodimers with other TGF-beta family members. Disruption of the TGF-beta/SMAD pathway has been implicated in a variety of human cancers. A chromosomal translocation that includes this gene is associated with Peters' anomaly, a congenital defect of the anterior chamber of the eye. Mutations in this gene may be associated with Loeys-Dietz syndrome. This gene encodes multiple isoforms that may undergo similar proteolytic processing. [provided by RefSeq, Aug 2016]

TGFB2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.942

PP5

Variant 1-218434118-C-T is Pathogenic according to our data. Variant chr1-218434118-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 547806.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=2, Uncertain_significance=2}.

BS2

High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TGFB2	NM_003238.6 link	c.547C>T	p.Arg183Cys	missense_variant	Exon 3 of 7	ENST00000366930.9	NP_003229.1	P61812-1Q59EG9
TGFB2	NM_001135599.4 link	c.631C>T	p.Arg211Cys	missense_variant	Exon 4 of 8		NP_001129071.1	P61812-2Q59EG9
TGFB2	NR_138148.2 link	n.1913C>T		non_coding_transcript_exon_variant	Exon 3 of 7
TGFB2	NR_138149.2 link	n.1997C>T		non_coding_transcript_exon_variant	Exon 4 of 8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TGFB2	ENST00000366930.9 link	c.547C>T	p.Arg183Cys	missense_variant	Exon 3 of 7	1	NM_003238.6	ENSP00000355897.4	P61812-1
TGFB2	ENST00000366929.4 link	c.631C>T	p.Arg211Cys	missense_variant	Exon 4 of 8	1		ENSP00000355896.4	P61812-2
TGFB2	ENST00000488793.1 link	n.211C>T		non_coding_transcript_exon_variant	Exon 3 of 3	3
TGFB2	ENST00000479322.1 link	n.-8C>T		upstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461858

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727234

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152182

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74350

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Loeys-Dietz syndrome 4

Pathogenic:2

Nov 01, 2016

Center for Human Genetics, Inc, Center for Human Genetics, Inc

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 183 of the TGFB2 protein (p.Arg183Cys). This variant is present in population databases (no rsID available, gnomAD 0.03%). This missense change has been observed in individuals with clinical features of TGFB2-related conditions (PMID: 32897753; internal data). This variant is also known as p.Arg211Cys. ClinVar contains an entry for this variant (Variation ID: 547806). 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) indicates that this missense variant is expected to disrupt TGFB2 protein function with a positive predictive value of 80%. This variant disrupts the p.Arg183 amino acid residue in TGFB2. Other variant(s) that disrupt this residue have been observed in individuals with TGFB2-related conditions (internal data), which suggests that this may be a clinically significant amino acid residue. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Dec 09, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R183C variant (also known as c.547C>T), located in coding exon 3 of the TGFB2 gene, results from a C to T substitution at nucleotide position 547. The arginine at codon 183 is replaced by cysteine, an amino acid with highly dissimilar properties. This variant was reported in a coronary artery dissection cohort (Carss KJ et al. Circ Genom Precis Med, 2020 Dec;13:e003030). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

not provided

Uncertain:1

Jul 15, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Identified in patients with spontaneous coronary artery dissection (SCAD) in published literature (PMID: 33125268, 32897753); 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; Also known as p.(R211C); This variant is associated with the following publications: (PMID: 33125268, 32897753, 28506304) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.96

BayesDel_addAF

Pathogenic

0.40

BayesDel_noAF

Pathogenic

0.34

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.94

D;.

Eigen

Pathogenic

0.97

Eigen_PC

Pathogenic

0.93

FATHMM_MKL

Uncertain

0.94

LIST_S2

Pathogenic

0.99

D;D

M_CAP

Benign

0.064

MetaRNN

Pathogenic

0.94

D;D

MetaSVM

Uncertain

0.33

MutationAssessor

Pathogenic

3.3

M;.

PrimateAI

Pathogenic

0.84

PROVEAN

Pathogenic

-6.1

D;D

REVEL

Pathogenic

0.80

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.96

MutPred

0.83

Loss of disorder (P = 0.0217);.;

MVP

0.94

MPC

2.0

ClinPred

1.0

GERP RS

5.9

Varity_R

0.72

gMVP

0.70

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over