1-218345420-T-TAGAAAG

Variant names:

• chr1-218345420-T-TAGAAAG
• rs886045957
• NM_003238.6:c.-1272_-1267dupAAGAGA

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_003238.6(TGFB2):​c.-1272_-1267dupAAGAGA variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000132 in 151,614 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: 𝑓 0.000013 (0 hom., cov: 32)
• Consequence: TGFB2 NM_003238.6 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -0.0870
• Publications: 0 publications found

Genes affected

TGFB2 (HGNC:11768): (transforming growth factor beta 2) 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 TGF-beta family members. Disruption of the TGF-beta/SMAD pathway has been implicated in a variety of human cancers. A chromosomal translocation that includes this gene is associated with Peters' anomaly, a congenital defect of the anterior chamber of the eye. Mutations in this gene may be associated with Loeys-Dietz syndrome. This gene encodes multiple isoforms that may undergo similar proteolytic processing. [provided by RefSeq, Aug 2016]

TGFB2-AS1 (HGNC:50628): (TGFB2 antisense RNA 1 (head to head))

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003238.6. 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
	TGFB2	NM_003238.6	MANE Select	c.-1272_-1267dupAAGAGA		5_prime_UTR	Exon 1 of 7	NP_003229.1	P61812-1
	TGFB2	NM_001135599.4		c.-1272_-1267dupAAGAGA		5_prime_UTR	Exon 1 of 8	NP_001129071.1	P61812-2
	TGFB2	NR_138148.2		n.95_100dupAAGAGA		non_coding_transcript_exon	Exon 1 of 7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFB2	ENST00000366930.9	TSL:1 MANE Select	c.-1272_-1267dupAAGAGA		5_prime_UTR	Exon 1 of 7	ENSP00000355897.4	P61812-1
	TGFB2-AS1	ENST00000687392.2		n.562_567dupCTTTCT		non_coding_transcript_exon	Exon 1 of 1
	TGFB2-AS1	ENST00000414452.3	TSL:3	n.449-38_449-33dupCTTTCT		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151614 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000243

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151614 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 73990

African (AFR) AF: 0.0000243 AC: 1 AN: 41212

American (AMR) AF: 0.00 AC: 0 AN: 15244

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5158

South Asian (SAS) AF: 0.00 AC: 0 AN: 4792

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10502

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67934

Other (OTH) AF: 0.00 AC: 0 AN: 2080

Alfa AF: 0.000169 Hom.: 0

Bravo AF: 0.0000340

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Loeys-Dietz syndrome (1)
-	1	-	Loeys-Dietz syndrome 4 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.087

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs886045957; hg19: chr1-218518762;