3-30672335-T-G

Variant names:

• chr3-30672335-T-G
• NM_003242.6:c.1152T>G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PP3_Strong PP5_Moderate

The NM_003242.6(TGFBR2):​c.1152T>G​(p.Asn384Lys) 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 Pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: TGFBR2 NM_003242.6 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.00100

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]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a domain Protein kinase (size 300) in uniprot entity TGFR2_HUMAN there are 34 pathogenic changes around while only 5 benign (87%) in NM_003242.6
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.992
• PP5: Variant 3-30672335-T-G is Pathogenic according to our data. Variant chr3-30672335-T-G is described in ClinVar as [Pathogenic]. Clinvar id is 1514292.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TGFBR2	NM_003242.6	c.1152T>G	p.Asn384Lys	missense_variant	Exon 4 of 7	ENST00000295754.10	NP_003233.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TGFBR2	ENST00000295754.10	c.1152T>G	p.Asn384Lys	missense_variant	Exon 4 of 7	1	NM_003242.6	ENSP00000295754.5
TGFBR2	ENST00000359013.4	c.1227T>G	p.Asn409Lys	missense_variant	Exon 5 of 8	1		ENSP00000351905.4
TGFBR2	ENST00000672866.1	n.2748T>G		non_coding_transcript_exon_variant	Exon 4 of 7

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection Pathogenic:1

Dec 07, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces asparagine, which is neutral and polar, with lysine, which is basic and polar, at codon 384 of the TGFBR2 protein (p.Asn384Lys). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of TGFBR2-related conditions (PMID: 25116393; Invitae). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 1514292). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt TGFBR2 protein function with a positive predictive value of 95%. This variant disrupts the p.Asn384 amino acid residue in TGFBR2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 16799921, 16928994; Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.0
CADD	Benign	15
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.97	D;.
Eigen	Benign	0.0044
Eigen_PC	Benign	-0.25
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Pathogenic	1.0	D;D
M_CAP	Pathogenic	0.72	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	0.89	D
MutationAssessor	Pathogenic	3.6	H;.
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-5.9	D;D
REVEL	Pathogenic	0.77
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.96
MutPred		0.94		Loss of ubiquitination at K381 (P = 0.0297);.;
MVP		0.97
MPC		1.6
ClinPred		1.0	D
GERP RS		-6.6
Varity_R		0.99
gMVP		0.99

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-30713827;