Genetic Variant TGFBR2:c.-122T>G (chr3-30606762-T-G) – ACMG Classification: Benign (-11 pts)

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_ModerateBP6BS1BS2

The NM_003242.6(TGFBR2):c.-122T>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000134 in 695,494 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 1 hom. )

Consequence

TGFBR2
NM_003242.6 5_prime_UTR

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 1.02

Publications

0 publications found

Variant links:

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

TGFBR2 links:

LOC105377015 (HGNC:):

LOC105377015 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.3).

BP6

Variant 3-30606762-T-G is Benign according to our data. Variant chr3-30606762-T-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 901873.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000112 (17/151976) while in subpopulation NFE AF = 0.000162 (11/67934). AF 95% confidence interval is 0.0000906. There are 0 homozygotes in GnomAd4. There are 8 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 17 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

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
TGFBR2	NM_003242.6	MANE Select	c.-122T>G	5_prime_UTR	Exon 1 of 7	NP_003233.4
TGFBR2	NM_001407126.1		c.-122T>G	5_prime_UTR	Exon 1 of 9	NP_001394055.1
TGFBR2	NM_001407127.1		c.-122T>G	5_prime_UTR	Exon 1 of 8	NP_001394056.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
TGFBR2	ENST00000295754.10	TSL:1 MANE Select	c.-122T>G	5_prime_UTR	Exon 1 of 7	ENSP00000295754.5	P37173-1
TGFBR2	ENST00000359013.4	TSL:1	c.-122T>G	5_prime_UTR	Exon 1 of 8	ENSP00000351905.4	P37173-2
TGFBR2	ENST00000941789.1		c.-122T>G	5_prime_UTR	Exon 1 of 7	ENSP00000611848.1

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

151976

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000162

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000140

AC:

AN:

543518

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

AN XY:

266622

show subpopulations

African (AFR)

AF:

0.0000812

AC:

AN:

12316

American (AMR)

AF:

0.00

AC:

AN:

7582

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

10856

East Asian (EAS)

AF:

0.00

AC:

AN:

23908

South Asian (SAS)

AF:

0.00

AC:

AN:

11212

European-Finnish (FIN)

AF:

0.00

AC:

AN:

31484

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1864

European-Non Finnish (NFE)

AF:

0.000179

AC:

AN:

418586

Other (OTH)

AF:

0.00

AC:

AN:

25710

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000112

AC:

AN:

151976

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74240

show subpopulations

African (AFR)

AF:

0.000145

AC:

AN:

41418

American (AMR)

AF:

0.00

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5150

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10588

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.000162

AC:

AN:

67934

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000982

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Diabetic retinopathy (1)

Loeys-Dietz syndrome 2 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.30

CADD

Benign

(source)

DANN

Benign

0.89

PhyloP100

1.0

PromoterAI

0.052

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over