NM_003242.6:c.1063G>C

Variant names:

• chr3-30672246-G-C
• rs104893813
• NM_003242.6:c.1063G>C

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PS3 PM1 PM2 PP2 PP3_Strong PP5

The NM_003242.6(TGFBR2):​c.1063G>C​(p.Ala355Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). ClinVar reports functional evidence for this variant: "SCV001362855: One study demonstrated intracellular accumulation of collagen type I in fibroblasts collected from the patient carrying this variant (Barnett_2011).". Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A355T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TGFBR2 NM_003242.6 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:3 U:1
• Conservation: PhyloP100: 3.95
• Publications: 11 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: Pathogenic. The variant received 14 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV001362855: One study demonstrated intracellular accumulation of collagen type I in fibroblasts collected from the patient carrying this variant (Barnett_2011).
• PM1: In a hotspot region, there are 13 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 9 uncertain in NM_003242.6
• PM2: Very rare variant in population databases, with high coverage
• 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 2, familial thoracic aortic aneurysm and aortic dissection, Loeys-Dietz syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.982
• PP5: Variant 3-30672246-G-C is Pathogenic according to our data. Variant chr3-30672246-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 12509.

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.1063G>C	p.Ala355Pro	missense	Exon 4 of 7	NP_003233.4
	TGFBR2	NM_001407126.1		c.1246G>C	p.Ala416Pro	missense	Exon 6 of 9	NP_001394055.1
	TGFBR2	NM_001407127.1		c.1171G>C	p.Ala391Pro	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.1063G>C	p.Ala355Pro	missense	Exon 4 of 7	ENSP00000295754.5	P37173-1
	TGFBR2	ENST00000359013.4	TSL:1	c.1138G>C	p.Ala380Pro	missense	Exon 5 of 8	ENSP00000351905.4	P37173-2
	TGFBR2	ENST00000941789.1		c.1063G>C	p.Ala355Pro	missense	Exon 4 of 7	ENSP00000611848.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	-	Colorectal cancer, hereditary nonpolyposis, type 6 (1)
1	-	-	Familial thoracic aortic aneurysm and aortic dissection (1)
1	-	-	Loeys-Dietz syndrome (1)
1	-	-	Loeys-Dietz syndrome 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.49
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.95	D
Eigen	Pathogenic	0.81
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.24	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		3.9
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-4.0	D
REVEL	Pathogenic	0.92
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0080	D
Polyphen		1.0	D
Vest4		0.89
MutPred		0.92		Gain of disorder (P = 0.0609)
MVP		0.99
MPC		1.6
ClinPred		1.0	D
GERP RS		2.8
Varity_R		0.99
gMVP		0.96
Mutation Taster		=6/94	disease causing (ClinVar)

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: rs104893813; hg19: chr3-30713738;