19-41348306-C-T

Variant names:

• chr19-41348306-C-T
• rs281865484
• NM_000660.7:c.505G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM1 PM2 PP3_Moderate

The NM_000660.7(TGFB1):​c.505G>A​(p.Glu169Lys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. E169Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: TGFB1 NM_000660.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.96
• Publications: 6 publications found

Genes affected

TGFB1 (HGNC:11766): (transforming growth factor beta 1) 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 TGFB family members. This encoded protein regulates cell proliferation, differentiation and growth, and can modulate expression and activation of other growth factors including interferon gamma and tumor necrosis factor alpha. This gene is frequently upregulated in tumor cells, and mutations in this gene result in Camurati-Engelmann disease. [provided by RefSeq, Aug 2016]

TGFB1 Gene-Disease associations (from GenCC):

• Camurati-Engelmann disease

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• inflammatory bowel disease, immunodeficiency, and encephalopathy

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• cystic fibrosis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM1: In a chain Latency-associated peptide (size 248) in uniprot entity TGFB1_HUMAN there are 9 pathogenic changes around while only 3 benign (75%) in NM_000660.7
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.892

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TGFB1	NM_000660.7	c.505G>A	p.Glu169Lys	missense_variant	Exon 2 of 7	ENST00000221930.6	NP_000651.3
TGFB1	XM_011527242.3	c.505G>A	p.Glu169Lys	missense_variant	Exon 2 of 7		XP_011525544.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TGFB1	ENST00000221930.6	c.505G>A	p.Glu169Lys	missense_variant	Exon 2 of 7	1	NM_000660.7	ENSP00000221930.4
TGFB1	ENST00000597453.1	n.36G>A		non_coding_transcript_exon_variant	Exon 1 of 3	1
TGFB1	ENST00000600196.2	c.505G>A	p.Glu169Lys	missense_variant	Exon 2 of 6	5		ENSP00000504008.1
TGFB1	ENST00000677934.1	c.505G>A	p.Glu169Lys	missense_variant	Exon 2 of 5			ENSP00000504769.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Uncertain	25
DANN	Uncertain	1.0
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.28	D
MetaRNN	Pathogenic	0.89	D
MetaSVM	Uncertain	-0.052	T
PhyloP100		5.0
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-3.3	D
REVEL	Uncertain	0.53
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Vest4		0.90
MutPred		0.66		Gain of MoRF binding (P = 0.003);
MVP		0.75
MPC		1.8
ClinPred		1.0	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.8
Mutation Taster		=25/75	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs281865484; hg19: chr19-41854211;