rs752823052

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_003238.6(TGFB2):c.386T>C(p.Ile129Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000118 in 1,610,668 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I129M) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

TGFB2
NM_003238.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 4.89

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 Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAd at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TGFB2	NM_003238.6 linkuse as main transcript	c.386T>C	p.Ile129Thr	missense_variant	2/7	ENST00000366930.9
TGFB2	NM_001135599.4 linkuse as main transcript	c.470T>C	p.Ile157Thr	missense_variant	3/8
TGFB2	NR_138148.2 linkuse as main transcript	n.1752T>C		non_coding_transcript_exon_variant	2/7
TGFB2	NR_138149.2 linkuse as main transcript	n.1836T>C		non_coding_transcript_exon_variant	3/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TGFB2	ENST00000366930.9 linkuse as main transcript	c.386T>C	p.Ile129Thr	missense_variant	2/7	1	NM_003238.6	P1	P61812-1
TGFB2	ENST00000366929.4 linkuse as main transcript	c.470T>C	p.Ile157Thr	missense_variant	3/8	1			P61812-2
TGFB2	ENST00000488793.1 linkuse as main transcript	n.50T>C		non_coding_transcript_exon_variant	2/3	3

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

250766

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135490

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000869

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.00000823

AC:

AN:

1458464

Hom.:

Cov.:

AF XY:

0.00000414

AC XY:

AN XY:

724824

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000896

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000541

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Loeys-Dietz syndrome 4

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Genetics Department, University Hospital of Toulouse	Jul 19, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Oct 22, 2023	This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 129 of the TGFB2 protein (p.Ile129Thr). This variant is present in population databases (rs752823052, gnomAD 0.01%). This missense change has been observed in individual(s) with clinical features of TGFB2-related conditions (PMID: 32154675). This variant is also known as p.Ile157Thr. ClinVar contains an entry for this variant (Variation ID: 581789). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TGFB2 protein function. 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:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jan 06, 2020

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID# 581789; Landrum et al., 2016); This variant is associated with the following publications: (PMID: 32154675) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.16

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Uncertain

0.55

D;.

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.96

D;D

M_CAP

Benign

0.043

MetaRNN

Uncertain

0.49

T;T

MetaSVM

Uncertain

-0.10

MutationAssessor

Benign

1.8

L;.

MutationTaster

Benign

0.98

D;D

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

-1.6

N;N

REVEL

Benign

0.26

Sift

Benign

0.030

D;T

Sift4G

Uncertain

0.056

T;T

Polyphen

0.61

P;P

Vest4

0.72

MutPred

0.45

Loss of stability (P = 0.0189);.;

MVP

0.53

MPC

1.0

ClinPred

0.33

GERP RS

5.1

Varity_R

0.11

gMVP

0.38

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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