3-30691909-TTATATATATA-TTATATA

Variant names:

• chr3-30691909-TTATA-T
• rs4016180
• NM_003242.6:c.*326_*329delATAT

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_003242.6(TGFBR2):​c.*326_*329delATAT variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00214 in 245,330 control chromosomes in the GnomAD database, including 1 homozygotes. There is a variant allele frequency bias in the population database for this variant (GnomAd4), which may indicate mosaicism or somatic mutations in the reference population data. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000041 (0 hom., cov: 0)
  • Exomes 𝑓: 0.0053 (1 hom.)
• Consequence: TGFBR2 NM_003242.6 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.883
• Publications: 3 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: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TGFBR2	NM_003242.6	c.*326_*329delATAT		3_prime_UTR_variant	Exon 7 of 7	ENST00000295754.10	NP_003233.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TGFBR2	ENST00000295754.10	c.*326_*329delATAT		3_prime_UTR_variant	Exon 7 of 7	1	NM_003242.6	ENSP00000295754.5

Frequencies

GnomAD3 genomes AF: 0.0000407 AC: 6 AN: 147274 Hom.: 0 Cov.: 0

Gnomad AFR AF: 0.0000502

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: 0.000215

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000299

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00528 AC: 518 AN: 98020 Hom.: 1 AF XY: 0.00528 AC XY: 257 AN XY: 48714

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00474 AC: 19 AN: 4012

American (AMR) AF: 0.00678 AC: 35 AN: 5160

Ashkenazi Jewish (ASJ) AF: 0.00345 AC: 16 AN: 4634

East Asian (EAS) AF: 0.00114 AC: 14 AN: 12238

South Asian (SAS) AF: 0.00373 AC: 25 AN: 6694

European-Finnish (FIN) AF: 0.0125 AC: 20 AN: 1602

Middle Eastern (MID) AF: 0.00800 AC: 4 AN: 500

European-Non Finnish (NFE) AF: 0.00611 AC: 345 AN: 56438

Other (OTH) AF: 0.00593 AC: 40 AN: 6742

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.0000407 AC: 6 AN: 147310 Hom.: 0 Cov.: 0 AF XY: 0.0000139 AC XY: 1 AN XY: 71710

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000501 AC: 2 AN: 39898

American (AMR) AF: 0.00 AC: 0 AN: 14758

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3422

East Asian (EAS) AF: 0.00 AC: 0 AN: 5076

South Asian (SAS) AF: 0.00 AC: 0 AN: 4692

European-Finnish (FIN) AF: 0.000215 AC: 2 AN: 9324

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 280

European-Non Finnish (NFE) AF: 0.0000299 AC: 2 AN: 66936

Other (OTH) AF: 0.00 AC: 0 AN: 2022

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.0537627), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 277

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.88
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: rs4016180; hg19: chr3-30733401;