chr3-30672197-G-C

Variant names:

• chr3-30672197-G-C
• rs764720370
• NM_003242.6:c.1014G>C

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM2 BP4_Strong BP6_Very_Strong BP7

The ENST00000295754.10(TGFBR2):​c.1014G>C​(p.Thr338Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,459,960 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. T338T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TGFBR2 ENST00000295754.10 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -9.30
• Publications: 1 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 Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• Loeys-Dietz syndrome 2

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

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP6: Variant 3-30672197-G-C is Benign according to our data. Variant chr3-30672197-G-C is described in ClinVar as Likely_benign. ClinVar VariationId is 1108209.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-9.3 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000295754.10. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFBR2	NM_003242.6	MANE Select	c.1014G>C	p.Thr338Thr	synonymous	Exon 4 of 7	NP_003233.4
	TGFBR2	NM_001407126.1		c.1197G>C	p.Thr399Thr	synonymous	Exon 6 of 9	NP_001394055.1
	TGFBR2	NM_001407127.1		c.1122G>C	p.Thr374Thr	synonymous	Exon 5 of 8	NP_001394056.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFBR2	ENST00000295754.10	TSL:1 MANE Select	c.1014G>C	p.Thr338Thr	synonymous	Exon 4 of 7	ENSP00000295754.5
	TGFBR2	ENST00000359013.4	TSL:1	c.1089G>C	p.Thr363Thr	synonymous	Exon 5 of 8	ENSP00000351905.4
	TGFBR2	ENST00000714391.1		c.987G>C	p.Thr329Thr	synonymous	Exon 5 of 8	ENSP00000519658.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1459960 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 725836

African (AFR) AF: 0.00 AC: 0 AN: 33446

American (AMR) AF: 0.00 AC: 0 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26104

East Asian (EAS) AF: 0.00 AC: 0 AN: 39662

South Asian (SAS) AF: 0.00 AC: 0 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53392

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 9.01e-7 AC: 1 AN: 1110318

Other (OTH) AF: 0.0000166 AC: 1 AN: 60324

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	Familial thoracic aortic aneurysm and aortic dissection (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.011
DANN	Benign	0.56
PhyloP100		-9.3
Mutation Taster		=100/0	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: rs764720370; hg19: chr3-30713689;