14-75971146-C-T

Variant names:

• chr14-75971146-C-T
• rs779897294
• NM_003239.5:c.626G>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 1P and 5B. PP3 BP6 BS1

The NM_003239.5(TGFB3):​c.626G>A​(p.Arg209His) variant causes a missense change. The variant allele was found at a frequency of 0.00000929 in 1,613,984 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R209P) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: TGFB3 NM_003239.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 5.65
• Publications: 1 publications found

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-AS1 (HGNC:53144): (TGFB3 antisense RNA 1)

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)

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.829
• BP6: Variant 14-75971146-C-T is Benign according to our data. Variant chr14-75971146-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 519332.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0000328 (5/152222) while in subpopulation AFR AF = 0.0000965 (4/41454). AF 95% confidence interval is 0.0000325. There are 0 homozygotes in GnomAd4. There are 3 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003239.5. 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
	TGFB3	NM_003239.5	MANE Select	c.626G>A	p.Arg209His	missense	Exon 3 of 7	NP_003230.1	A5YM40
	TGFB3	NM_001329939.2		c.626G>A	p.Arg209His	missense	Exon 4 of 8	NP_001316868.1	A5YM40
	TGFB3	NM_001329938.2		c.626G>A	p.Arg209His	missense	Exon 3 of 5	NP_001316867.1	P10600-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFB3	ENST00000238682.8	TSL:1 MANE Select	c.626G>A	p.Arg209His	missense	Exon 3 of 7	ENSP00000238682.3	P10600-1
	TGFB3	ENST00000556285.1	TSL:1	c.626G>A	p.Arg209His	missense	Exon 3 of 5	ENSP00000451110.1	P10600-2
	TGFB3	ENST00000964917.1		c.788G>A	p.Arg263His	missense	Exon 4 of 8	ENSP00000634976.1

Frequencies

GnomAD3 genomes AF: 0.0000328 AC: 5 AN: 152222 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000965

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251278 AF XY: 0.0000221

Gnomad AFR exome AF: 0.00

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000684 AC: 10 AN: 1461762 Hom.: 0 Cov.: 31 AF XY: 0.0000110 AC XY: 8 AN XY: 727198

African (AFR) AF: 0.0000299 AC: 1 AN: 33478

American (AMR) AF: 0.0000447 AC: 2 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.0000383 AC: 1 AN: 26134

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53332

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111976

Other (OTH) AF: 0.0000166 AC: 1 AN: 60394

GnomAD4 genome AF: 0.0000328 AC: 5 AN: 152222 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74366

African (AFR) AF: 0.0000965 AC: 4 AN: 41454

American (AMR) AF: 0.00 AC: 0 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68048

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000302

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	Rienhoff syndrome (2)
-	1	-	Familial thoracic aortic aneurysm and aortic dissection (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Uncertain	0.095	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.49	T
Eigen	Uncertain	0.21
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.77	T
M_CAP	Benign	0.054	D
MetaRNN	Pathogenic	0.83	D
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	1.9	L
PhyloP100		5.6
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	-0.87	N
REVEL	Benign	0.29
Sift	Benign	0.40	T
Sift4G	Benign	0.30	T
Polyphen		0.40	B
Vest4		0.86
MutPred		0.70		Loss of solvent accessibility (P = 0.1077)
MVP		0.93
MPC		1.8
ClinPred		0.86	D
GERP RS		5.5
Varity_R		0.15
gMVP		0.62
Mutation Taster		=74/26	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: rs779897294; hg19: chr14-76437489; COSMIC: COSV106365353; COSMIC: COSV106365353;