chr14-75959320-TTCAG-T

Variant names:

• chr14-75959319-GTTCA-GT
• NM_003239.5:c.1103_1105delTGA

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PM4_Supporting

The NM_003239.5(TGFB3):​c.1103_1105delTGA​(p.Leu368_Asn369delinsHis) variant causes a disruptive inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TGFB3 NM_003239.5 disruptive_inframe_deletion
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.32
• Publications: 0 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]

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: Unknown, AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_003239.5. Strenght limited to Supporting due to length of the change: 1aa.

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.1103_1105delTGA	p.Leu368_Asn369delinsHis	disruptive_inframe_deletion	Exon 7 of 7	NP_003230.1	A5YM40
	TGFB3	NM_001329939.2		c.1103_1105delTGA	p.Leu368_Asn369delinsHis	disruptive_inframe_deletion	Exon 8 of 8	NP_001316868.1	A5YM40

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFB3	ENST00000238682.8	TSL:1 MANE Select	c.1103_1105delTGA	p.Leu368_Asn369delinsHis	disruptive_inframe_deletion	Exon 7 of 7	ENSP00000238682.3	P10600-1
	TGFB3	ENST00000964917.1		c.1265_1267delTGA	p.Leu422_Asn423delinsHis	disruptive_inframe_deletion	Exon 8 of 8	ENSP00000634976.1
	TGFB3	ENST00000556674.2	TSL:3	c.1103_1105delTGA	p.Leu368_Asn369delinsHis	disruptive_inframe_deletion	Exon 8 of 8	ENSP00000502685.1	P10600-1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr14-76425662;