rs2305089

Positions:

• chr6-166165782-C-A
• chr6-166165782-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001366285.2(TBXT):​c.530G>T​(p.Gly177Val) 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. G177D) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TBXT NM_001366285.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.58

Genes affected

TBXT (HGNC:11515): (T-box transcription factor T) The protein encoded by this gene is an embryonic nuclear transcription factor that binds to a specific DNA element, the palindromic T-site. It binds through a region in its N-terminus, called the T-box, and effects transcription of genes required for mesoderm formation and differentiation. The protein is localized to notochord-derived cells. Variation in this gene was associated with susceptibility to neural tube defects and chordoma. A mutation in this gene was found in a family with sacral agenesis with vertebral anomalies. [provided by RefSeq, Sep 2018]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.781

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBXT	NM_001366285.2	c.530G>T	p.Gly177Val	missense_variant	3/8	ENST00000366876.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBXT	ENST00000366876.7	c.530G>T	p.Gly177Val	missense_variant	3/8	1	NM_001366285.2	P4
TBXT	ENST00000366871.7	c.530G>T	p.Gly177Val	missense_variant	4/8	1
TBXT	ENST00000296946.6	c.530G>T	p.Gly177Val	missense_variant	4/9	5		A1
TBXT	ENST00000461348.2	c.530G>T	p.Gly177Val	missense_variant	4/6	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000205 AC: 3 AN: 1461870 Hom.: 0 Cov.: 54 AF XY: 0.00000138 AC XY: 1 AN XY: 727234

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.33
BayesDel_addAF	Uncertain	0.096	D
BayesDel_noAF	Benign	-0.10
CADD	Uncertain	24
DANN	Benign	0.94
DEOGEN2	Uncertain	0.74	D;.;.;.
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.32
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.86	D;D;T;D
M_CAP	Benign	0.034	D
MetaRNN	Pathogenic	0.78	D;D;D;D
MetaSVM	Benign	-0.33	T
MutationTaster	Benign	2.6e-13	P;P
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-5.1	D;D;D;D
REVEL	Uncertain	0.45
Sift	Benign	0.041	D;D;D;D
Sift4G	Benign	0.10	T;T;.;T
Polyphen		0.14	B;.;.;.
Vest4		0.51
MutPred		0.58		Loss of sheet (P = 0.0228);Loss of sheet (P = 0.0228);Loss of sheet (P = 0.0228);Loss of sheet (P = 0.0228);
MVP		0.89
MPC		1.4
ClinPred		0.95	D
GERP RS		4.1
Varity_R		0.84
gMVP		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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-166579270;