rs281865485

Variant names:

• chr19-41342218-G-C
• rs281865485
• NM_000660.7:c.664C>G

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_000660.7(TGFB1):​c.664C>G​(p.His222Asp) 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 not provided (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H222R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TGFB1 NM_000660.7 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 3.35
• Publications: 16 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: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 11 uncertain in NM_000660.7
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.767

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TGFB1	NM_000660.7	c.664C>G	p.His222Asp	missense_variant	Exon 4 of 7	ENST00000221930.6	NP_000651.3
TGFB1	XM_011527242.3	c.664C>G	p.His222Asp	missense_variant	Exon 4 of 7		XP_011525544.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TGFB1	ENST00000221930.6	c.664C>G	p.His222Asp	missense_variant	Exon 4 of 7	1	NM_000660.7	ENSP00000221930.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Diaphyseal dysplasia Other:1

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.23
CADD	Uncertain	24
DANN	Uncertain	0.99
Eigen	Benign	-0.048
Eigen_PC	Benign	0.099
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.032	D
MetaRNN	Pathogenic	0.77	D
MetaSVM	Benign	-0.69	T
PhyloP100		3.4
PrimateAI	Uncertain	0.49	T
PROVEAN	Pathogenic	-5.5	D
REVEL	Uncertain	0.48
Sift	Uncertain	0.0050	D
Sift4G	Benign	0.14	T
Vest4		0.80
ClinPred		0.97	D
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Mutation Taster		=46/54	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
Splicevardb		2.0
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: rs281865485; hg19: chr19-41848123;