9-99149252-C-T

Variant names:

• chr9-99149252-C-T
• rs111426349
• NM_004612.4:c.1459C>T

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PM1 PM2 PM5 PP3_Strong PP5_Very_Strong

The NM_004612.4(TGFBR1):​c.1459C>T​(p.Arg487Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R487Q) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TGFBR1 NM_004612.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:13
• Conservation: PhyloP100: 2.62
• Publications: 26 publications found

Genes affected

TGFBR1 (HGNC:11772): (transforming growth factor beta receptor 1) The protein encoded by this gene forms a heteromeric complex with type II TGF-beta receptors when bound to TGF-beta, transducing the TGF-beta signal from the cell surface to the cytoplasm. The encoded protein is a serine/threonine protein kinase. Mutations in this gene have been associated with Loeys-Dietz aortic aneurysm syndrome (LDAS). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]

TGFBR1 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

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Loeys-Dietz syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• multiple self-healing squamous epithelioma

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 14 uncertain in NM_004612.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr9-99149253-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 12525.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.983
• PP5: Variant 9-99149252-C-T is Pathogenic according to our data. Variant chr9-99149252-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 12526.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004612.4. 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
	TGFBR1	NM_004612.4	MANE Select	c.1459C>T	p.Arg487Trp	missense	Exon 9 of 9	NP_004603.1	P36897-1
	TGFBR1	NM_001306210.2		c.1471C>T	p.Arg491Trp	missense	Exon 9 of 9	NP_001293139.1	P36897-2
	TGFBR1	NM_001407416.1		c.1303C>T	p.Arg435Trp	missense	Exon 8 of 8	NP_001394345.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFBR1	ENST00000374994.9	TSL:1 MANE Select	c.1459C>T	p.Arg487Trp	missense	Exon 9 of 9	ENSP00000364133.4	P36897-1
	TGFBR1	ENST00000552516.5	TSL:1	c.1471C>T	p.Arg491Trp	missense	Exon 9 of 9	ENSP00000447297.1	P36897-2
	TGFBR1	ENST00000374990.6	TSL:1	c.1228C>T	p.Arg410Trp	missense	Exon 8 of 8	ENSP00000364129.2	P36897-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
4	-	-	Familial thoracic aortic aneurysm and aortic dissection (4)
3	-	-	Loeys-Dietz syndrome 1 (3)
3	-	-	not provided (3)
1	-	-	Loeys-Dietz syndrome (1)
1	-	-	Loeys-Dietz syndrome;C4707243:Familial thoracic aortic aneurysm and aortic dissection (1)
1	-	-	Multiple self-healing squamous epithelioma;C4551955:Loeys-Dietz syndrome 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.49
CADD	Uncertain	25
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.52	D
Eigen	Uncertain	0.68
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Pathogenic	0.32	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.6	H
PhyloP100		2.6
PrimateAI	Pathogenic	0.93	D
PROVEAN	Pathogenic	-7.2	D
REVEL	Pathogenic	0.92
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.89
MutPred		0.94		Gain of ubiquitination at K490 (P = 0.0289)
MVP		0.97
MPC		1.7
ClinPred		1.0	D
GERP RS		3.8
Varity_R		0.97
gMVP		0.79
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs111426349; hg19: chr9-101911534; COSMIC: COSV66625981; COSMIC: COSV66625981;