rs150022335

Variant names:

• chr3-30671800-C-T
• rs150022335
• NM_003242.6:c.617C>T

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 1P and 9B. PP2 BP4_Strong BS1_Supporting BS2

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. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. T206T) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000055 (0 hom.)
• Consequence: TGFBR2 NM_003242.6 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7 B:1
• Conservation: PhyloP100: 0.675
• Publications: 9 publications found

Genes affected

TGFBR2 (HGNC:11773): (transforming growth factor beta receptor 2) The protein encoded by this gene is a transmembrane protein that has a protein kinase domain, forms a heterodimeric complex with TGF-beta receptor type-1, and binds TGF-beta. This receptor/ligand complex phosphorylates proteins, which then enter the nucleus and regulate the transcription of genes related to cell proliferation, cell cycle arrest, wound healing, immunosuppression, and tumorigenesis. Mutations in this gene have been associated with Marfan Syndrome, Loeys-Deitz Aortic Aneurysm Syndrome, and the development of various types of tumors. Alternatively spliced transcript variants encoding different isoforms have been characterized. [provided by RefSeq, Aug 2017]

TGFBR2 Gene-Disease associations (from GenCC):

• familial thoracic aortic aneurysm and aortic dissection

  Inheritance: AD, Unknown Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Loeys-Dietz syndrome 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp
• Loeys-Dietz syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 91 curated pathogenic missense variants (we use a threshold of 10). The gene has 9 curated benign missense variants. Gene score misZ: 2.2437 (below the threshold of 3.09). Trascript score misZ: 2.9378 (below the threshold of 3.09). GenCC associations: The gene is linked to Loeys-Dietz syndrome, familial thoracic aortic aneurysm and aortic dissection, Loeys-Dietz syndrome 2.
• BP4: Computational evidence support a benign effect (MetaRNN=0.06431836).
• BS1: Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0000525 (8/152320) while in subpopulation SAS AF = 0.000414 (2/4830). AF 95% confidence interval is 0.0000729. There are 0 homozygotes in GnomAd4. There are 4 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAd4 at 8 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003242.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFBR2	NM_003242.6	MANE Select	c.617C>T	p.Thr206Met	missense	Exon 4 of 7	NP_003233.4
	TGFBR2	NM_001407126.1		c.800C>T	p.Thr267Met	missense	Exon 6 of 9	NP_001394055.1
	TGFBR2	NM_001407127.1		c.725C>T	p.Thr242Met	missense	Exon 5 of 8	NP_001394056.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFBR2	ENST00000295754.10	TSL:1 MANE Select	c.617C>T	p.Thr206Met	missense	Exon 4 of 7	ENSP00000295754.5	P37173-1
	TGFBR2	ENST00000359013.4	TSL:1	c.692C>T	p.Thr231Met	missense	Exon 5 of 8	ENSP00000351905.4	P37173-2
	TGFBR2	ENST00000941789.1		c.617C>T	p.Thr206Met	missense	Exon 4 of 7	ENSP00000611848.1

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152202 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000398 AC: 10 AN: 251142 AF XY: 0.0000368

Gnomad AFR exome AF: 0.0000616

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000217

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000554 AC: 81 AN: 1461878 Hom.: 0 Cov.: 34 AF XY: 0.0000550 AC XY: 40 AN XY: 727240

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.000882 AC: 35 AN: 39700

South Asian (SAS) AF: 0.0000696 AC: 6 AN: 86256

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53420

Middle Eastern (MID) AF: 0.00121 AC: 7 AN: 5768

European-Non Finnish (NFE) AF: 0.0000252 AC: 28 AN: 1112000

Other (OTH) AF: 0.0000662 AC: 4 AN: 60396

GnomAD4 genome AF: 0.0000525 AC: 8 AN: 152320 Hom.: 0 Cov.: 33 AF XY: 0.0000537 AC XY: 4 AN XY: 74478

African (AFR) AF: 0.0000241 AC: 1 AN: 41566

American (AMR) AF: 0.0000653 AC: 1 AN: 15310

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5174

South Asian (SAS) AF: 0.000414 AC: 2 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10600

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68048

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.0000510 Hom.: 0

Bravo AF: 0.0000945

ExAC AF: 0.0000330 AC: 4

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	3	-	Familial thoracic aortic aneurysm and aortic dissection (3)
-	2	-	not provided (2)
-	1	1	not specified (2)
-	1	-	Loeys-Dietz syndrome 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.092
BayesDel_addAF	Benign	-0.38	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	17
DANN	Uncertain	0.98
DEOGEN2	Benign	0.39	T
Eigen	Benign	-0.69
Eigen_PC	Benign	-0.66
FATHMM_MKL	Benign	0.19	N
LIST_S2	Uncertain	0.87	D
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.064	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	0.34	N
PhyloP100		0.68
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-1.0	N
REVEL	Benign	0.098
Sift	Benign	0.055	T
Sift4G	Benign	0.12	T
Polyphen		0.50	P
Vest4		0.053
MVP		0.87
MPC		0.56
ClinPred		0.020	T
GERP RS		3.5
Varity_R		0.051
gMVP		0.42
Mutation Taster		=94/6	polymorphism

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

Other links and lift over

dbSNP: rs150022335; hg19: chr3-30713292; COSMIC: COSV55461053;