chr14-75980923-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS1

The NM_003239.5(TGFB3):c.-30G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000399 in 1,605,020 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000040 ( 0 hom. )

Consequence

TGFB3
NM_003239.5 5_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:5

Conservation

PhyloP100: -0.0530

Publications

2 publications found

Variant links:

Genes affected

TGFB3 (HGNC:11769): (transforming growth factor beta 3) This gene encodes a secreted ligand of the TGF-beta (transforming growth factor-beta) superfamily of proteins. Ligands of this family bind various TGF-beta receptors leading to recruitment and activation of SMAD family transcription factors that regulate gene expression. The encoded preproprotein is proteolytically processed to generate a latency-associated peptide (LAP) and a mature peptide, and is found in either a latent form composed of a mature peptide homodimer, a LAP homodimer, and a latent TGF-beta binding protein, or in an active form consisting solely of the mature peptide homodimer. The mature peptide may also form heterodimers with other TGF-beta family members. This protein is involved in embryogenesis and cell differentiation, and may play a role in wound healing. Mutations in this gene are a cause of aortic aneurysms and dissections, as well as familial arrhythmogenic right ventricular dysplasia 1. [provided by RefSeq, Aug 2016]

TGFB3 links:

IFT43 (HGNC:29669): (intraflagellar transport 43) This gene encodes a subunit of the intraflagellar transport complex A (IFT-A). IFT-A is a multiprotein complex that plays an important role in cilia assembly and maintenance by mediating retrograde ciliary transport. Mutations in this gene are a cause of cranioectodermal dysplasia-3 (CED3), also known as Sensenbrenner syndrome. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

IFT43 Gene-Disease associations (from GenCC):

cranioectodermal dysplasia 3
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
short-rib thoracic dysplasia 18 with polydactyly
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
cranioectodermal dysplasia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
ciliopathy
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics
retinitis pigmentosa 81
Inheritance: AR, Unknown Classification: LIMITED Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)

IFT43 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.71).

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0000395 (6/152056) while in subpopulation AFR AF = 0.0000966 (4/41400). AF 95% confidence interval is 0.0000325. There are 0 homozygotes in GnomAd4. There are 5 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
TGFB3	NM_003239.5 link	c.-30G>A	5_prime_UTR_variant	Exon 1 of 7	ENST00000238682.8	NP_003230.1	P10600-1A5YM40B3KVH9
TGFB3	NM_001329939.2 link	c.-30G>A	5_prime_UTR_variant	Exon 2 of 8		NP_001316868.1	P10600-1A5YM40
TGFB3	NM_001329938.2 link	c.-30G>A	5_prime_UTR_variant	Exon 1 of 5		NP_001316867.1	P10600-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TGFB3	ENST00000238682.8 link	c.-30G>A		5_prime_UTR_variant	Exon 1 of 7	1	NM_003239.5	ENSP00000238682.3		P10600-1

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152056

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000402

AC:

AN:

249028

AF XY:

0.0000592

show subpopulations

Gnomad AFR exome

AF:

0.0000641

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000531

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000399

AC:

AN:

1452964

Hom.:

Cov.:

AF XY:

0.0000512

AC XY:

AN XY:

723314

show subpopulations

African (AFR)

AF:

0.0000600

AC:

AN:

33310

American (AMR)

AF:

0.0000447

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26062

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39658

South Asian (SAS)

AF:

0.00

AC:

AN:

86080

European-Finnish (FIN)

AF:

0.0000190

AC:

AN:

52534

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5614

European-Non Finnish (NFE)

AF:

0.0000462

AC:

AN:

1104900

Other (OTH)

AF:

0.00

AC:

AN:

60094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

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:

0.0000395

AC:

AN:

152056

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74254

show subpopulations

African (AFR)

AF:

0.0000966

AC:

AN:

41400

American (AMR)

AF:

0.00

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4800

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10580

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.517

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:

0.0000815

Hom.:

Bravo

AF:

0.0000416

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Dec 05, 2022

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Nucleotide substitution has no predicted effect on splicing and is not conserved across species; This variant is associated with the following publications: (PMID: 12529708, 34426522, 31402444, 15639475) -

Sep 17, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The TGFB3 c.-30G>A variant (rs770828281, ClinVar Variation ID: 12474), also known as c.-36G>A, is reported in the literature in multiple individuals in a family affected with arrhythmogenic right ventricular cardiomyopathy (Beffagna 2005). This variant is found in the general population with an overall allele frequency of 0.004% (10/249,028 alleles) in the Genome Aggregation Database (v2.1.1). This variant occurs in the 5' untranslated region and does not create a novel protein translation start codon. Due to limited information, the clinical significance of this variant is uncertain at this time. References: Beffagna G et al. Regulatory mutations in transforming growth factor-beta3 gene cause arrhythmogenic right ventricular cardiomyopathy type 1. Cardiovasc Res. 2005 Feb 1;65(2):366-73. PMID: 15639475. -

Arrhythmogenic right ventricular dysplasia 1

Pathogenic:1

Feb 01, 2005

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Arrhythmogenic right ventricular dysplasia 1;C3810012:Rienhoff syndrome

Uncertain:1

Sep 06, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

TGFB3-related disorder

Uncertain:1

May 29, 2024

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The TGFB3 c.-30G>A variant is located in the 5' untranslated region. This variant has been reported to segregate with disease in a large family with arrhythmogenic right ventricular dysplasia (Rampazzo et al. 2003. PubMed ID: 12529708; Beffagna et al. 2005. PubMed ID: 15639475). In vitro experimental studies suggest this variant impacts protein function (Beffagna et al. 2005. PubMed ID: 15639475). This variant is reported in 0.0064% of alleles in individuals of African descent in gnomAD. Although we suspect that this variant may be pathogenic, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Rienhoff syndrome

Uncertain:1

Aug 12, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant occurs in a non-coding region of the TGFB3 gene. It does not change the encoded amino acid sequence of the TGFB3 protein. This variant is present in population databases (rs770828281, ExAC 0.02%). This variant has been observed in individual(s) with arrhythmogenic right ventricular cardiomyopathy (PMID: 15639475). This variant is also known as -36G>A. ClinVar contains an entry for this variant (Variation ID: 12474). Algorithms developed to predict the effect of variants on protein structure and function are not available or were not evaluated for this variant. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on TGFB3 function (PMID: 15639475). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.71

CADD

Benign

(source)

DANN

Benign

0.82

PhyloP100

-0.053

PromoterAI

-0.041

Neutral

(source)

Mutation Taster

=70/230

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over