12-114671270-G-C

Position:

• chr12-114671270-G-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_005996.4(TBX3):​c.*571C>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0116 in 233,580 control chromosomes in the GnomAD database, including 47 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0092 (28 hom., cov: 33)
  • Exomes 𝑓: 0.016 (19 hom.)
• Consequence: TBX3 NM_005996.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 2.44

Genes affected

TBX3 (HGNC:11602): (T-box transcription factor 3) This gene is a member of a phylogenetically conserved family of genes that share a common DNA-binding domain, the T-box. T-box genes encode transcription factors involved in the regulation of developmental processes. This protein is a transcriptional repressor and is thought to play a role in the anterior/posterior axis of the tetrapod forelimb. Mutations in this gene cause ulnar-mammary syndrome, affecting limb, apocrine gland, tooth, hair, and genital development. Alternative splicing of this gene results in three transcript variants encoding different isoforms; however, the full length nature of one variant has not been determined. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.49).
• BP6: Variant 12-114671270-G-C is Benign according to our data. Variant chr12-114671270-G-C is described in ClinVar as [Benign]. Clinvar id is 307338.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.0592 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBX3	NM_005996.4	c.*571C>G		3_prime_UTR_variant	7/7	ENST00000349155.7
TBX3	NM_016569.4	c.*571C>G		3_prime_UTR_variant	8/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBX3	ENST00000349155.7	c.*571C>G		3_prime_UTR_variant	7/7	1	NM_005996.4	P4
TBX3	ENST00000257566.7	c.*571C>G		3_prime_UTR_variant	8/8	1		A1

Frequencies

GnomAD3 genomes AF: 0.00922 AC: 1403 AN: 152130 Hom.: 29 Cov.: 33

Gnomad AFR AF: 0.00234

Gnomad AMI AF: 0.0219

Gnomad AMR AF: 0.00700

Gnomad ASJ AF: 0.0323

Gnomad EAS AF: 0.0352

Gnomad SAS AF: 0.0646

Gnomad FIN AF: 0.00123

Gnomad MID AF: 0.0253

Gnomad NFE AF: 0.00772

Gnomad OTH AF: 0.0125

GnomAD4 exome AF: 0.0161 AC: 1312 AN: 81332 Hom.: 19 Cov.: 0 AF XY: 0.0163 AC XY: 614 AN XY: 37666

Gnomad4 AFR exome AF: 0.00346

Gnomad4 AMR exome AF: 0.00497

Gnomad4 ASJ exome AF: 0.0313

Gnomad4 EAS exome AF: 0.0490

Gnomad4 SAS exome AF: 0.0576

Gnomad4 FIN exome AF: 0.0152

Gnomad4 NFE exome AF: 0.00880

Gnomad4 OTH exome AF: 0.0125

GnomAD4 genome AF: 0.00925 AC: 1408 AN: 152248 Hom.: 28 Cov.: 33 AF XY: 0.0106 AC XY: 786 AN XY: 74448

Gnomad4 AFR AF: 0.00233

Gnomad4 AMR AF: 0.00699

Gnomad4 ASJ AF: 0.0323

Gnomad4 EAS AF: 0.0353

Gnomad4 SAS AF: 0.0651

Gnomad4 FIN AF: 0.00123

Gnomad4 NFE AF: 0.00772

Gnomad4 OTH AF: 0.0137

Alfa AF: 0.00662 Hom.: 0

Bravo AF: 0.00736

Asia WGS AF: 0.0420 AC: 147 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Ulnar-mammary syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.49
CADD	Benign	17
DANN	Benign	0.83

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: rs3741697; hg19: chr12-115109075;