9-99105216-C-G

Variant names:

• chr9-99105216-C-G
• rs1331965992
• NM_004612.4:c.11C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_004612.4(TGFBR1):​c.11C>G​(p.Ala4Gly) 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 benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A4V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TGFBR1 NM_004612.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.647

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the TGFBR1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 48 curated pathogenic missense variants (we use a threshold of 10). The gene has 16 curated benign missense variants. Gene score misZ: 2.7935 (below the threshold of 3.09). Trascript score misZ: 3.6468 (above the threshold of 3.09). GenCC associations: The gene is linked to familial thoracic aortic aneurysm and aortic dissection, Loeys-Dietz syndrome, multiple self-healing squamous epithelioma, Loeys-Dietz syndrome 1.
• BP4: Computational evidence support a benign effect (MetaRNN=0.27191466).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TGFBR1	NM_004612.4	c.11C>G	p.Ala4Gly	missense_variant	Exon 1 of 9	ENST00000374994.9	NP_004603.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TGFBR1	ENST00000374994.9	c.11C>G	p.Ala4Gly	missense_variant	Exon 1 of 9	1	NM_004612.4	ENSP00000364133.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 930960 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 436948

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.098
BayesDel_addAF	Benign	-0.036	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	20
DANN	Uncertain	0.98
DEOGEN2	Benign	0.31	T;.;.
Eigen	Benign	-0.25
Eigen_PC	Benign	-0.27
FATHMM_MKL	Benign	0.35	N
LIST_S2	Benign	0.58	T;T;T
M_CAP	Pathogenic	0.98	D
MetaRNN	Benign	0.27	T;T;T
MetaSVM	Benign	-0.55	T
MutationAssessor	Benign	0.0	N;N;N
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-0.44	N;N;N
REVEL	Benign	0.25
Sift	Benign	0.26	T;D;T
Sift4G	Benign	0.35	T;T;T
Polyphen		0.86	P;P;.
Vest4		0.20
MutPred		0.27		Loss of helix (P = 0.0138);Loss of helix (P = 0.0138);Loss of helix (P = 0.0138);
MVP		0.66
MPC		0.52
ClinPred		0.38	T
GERP RS		0.66
Varity_R		0.070
gMVP		0.43

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

LitVar

Other links and lift over

dbSNP: rs1331965992; hg19: chr9-101867498;