Genetic Variant TBX2:p.Ala58Glu (chr17-61400349-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_005994.4(TBX2):c.173C>A(p.Ala58Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000116 in 861,068 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000012 ( 0 hom. )

Consequence

TBX2
NM_005994.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.06

Publications

0 publications found

Variant links:

Genes affected

TBX2 (HGNC:11597): (T-box transcription factor 2) 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 gene product is the human homolog of mouse Tbx2, and shares strong sequence similarity with Drosophila omb protein. Expression studies indicate that this gene may have a potential role in tumorigenesis as an immortalizing agent. Transcript heterogeneity due to alternative polyadenylation has been noted for this gene. [provided by RefSeq, Jul 2008]

TBX2 links:

TBX2-AS1 (HGNC:50355): (TBX2 antisense RNA 1)

TBX2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBX2	NM_005994.4 link	c.173C>A	p.Ala58Glu	missense_variant	Exon 1 of 7	ENST00000240328.4	NP_005985.3	Q13207A0A024QZ86

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TBX2	ENST00000240328.4 link	c.173C>A	p.Ala58Glu	missense_variant	Exon 1 of 7	1	NM_005994.4	ENSP00000240328.3		Q13207

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000116

AC:

AN:

861068

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

401374

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

16282

American (AMR)

AF:

0.00

AC:

AN:

1756

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

5712

East Asian (EAS)

AF:

0.00

AC:

AN:

4776

South Asian (SAS)

AF:

0.00

AC:

AN:

17594

European-Finnish (FIN)

AF:

0.00

AC:

AN:

2726

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1784

European-Non Finnish (NFE)

AF:

0.00000128

AC:

AN:

781686

Other (OTH)

AF:

0.00

AC:

AN:

28752

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 28, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.173C>A (p.A58E) alteration is located in exon 1 (coding exon 1) of the TBX2 gene. This alteration results from a C to A substitution at nucleotide position 173, causing the alanine (A) at amino acid position 58 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.37

BayesDel_addAF

Uncertain

0.051

BayesDel_noAF

Benign

-0.16

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.33

Eigen

Benign

0.18

Eigen_PC

Benign

0.14

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.69

M_CAP

Pathogenic

0.94

MetaRNN

Uncertain

0.49

MetaSVM

Uncertain

0.18

MutationAssessor

Benign

1.6

PhyloP100

1.1

PrimateAI

Pathogenic

0.92

PROVEAN

Benign

-1.0

REVEL

Uncertain

0.36

Sift

Benign

0.13

Sift4G

Benign

0.37

Polyphen

0.99

Vest4

0.34

MutPred

0.25

Gain of helix (P = 0.2059);

MVP

0.61

ClinPred

0.94

GERP RS

3.6

Varity_R

0.21

gMVP

0.67

Mutation Taster

=59/41

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

17-61400349-C-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over