chr17-61478634-T-G

Variant names:

• chr17-61478634-T-G
• rs886041115
• NM_001321120.2:c.557T>G

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001321120.2(TBX4):​c.557T>G​(p.Leu186Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TBX4 NM_001321120.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 7.95
• Publications: 1 publications found

Genes affected

TBX4 (HGNC:11603): (T-box transcription factor 4) 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 is the human homolog of mouse Tbx4, which is closely linked to Tbx2 on mouse chromosome 11. Similarly this gene, like TBX2, maps to human chromosome 17. Expression studies in mouse and chicken show that Tbx4 is expressed in developing hindlimb, but not in forelimb buds, suggesting a role for this gene in regulating limb development and specification of limb identity. [provided by RefSeq, Jul 2008]

TBX4 Gene-Disease associations (from GenCC):

• coxopodopatellar syndrome

  Inheritance: AD, SD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, PanelApp Australia
• pulmonary arterial hypertension

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• autosomal recessive amelia

  Inheritance: AR, SD Classification: STRONG, MODERATE, LIMITED Submitted by: G2P, PanelApp Australia, Ambry Genetics
• heritable pulmonary arterial hypertension

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.987

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001321120.2. 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
	TBX4	NM_001321120.2	MANE Select	c.557T>G	p.Leu186Arg	missense	Exon 6 of 9	NP_001308049.1	P57082-2
	TBX4	NM_018488.3		c.557T>G	p.Leu186Arg	missense	Exon 5 of 8	NP_060958.2	P57082-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TBX4	ENST00000644296.1	MANE Select	c.557T>G	p.Leu186Arg	missense	Exon 6 of 9	ENSP00000495986.1	P57082-2
	TBX4	ENST00000240335.1	TSL:1	c.557T>G	p.Leu186Arg	missense	Exon 5 of 8	ENSP00000240335.1	P57082-1
	TBX4	ENST00000589449.5	TSL:1	n.87T>G		non_coding_transcript_exon	Exon 2 of 8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Coxopodopatellar syndrome (1)
-	1	-	Pulmonary hypertension, primary, 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.91	D
Eigen	Pathogenic	0.95
Eigen_PC	Pathogenic	0.87
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.54	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		8.0
PrimateAI	Pathogenic	0.94	D
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.94		Gain of disorder (P = 0.0483)
MVP		0.95
MPC		1.5
ClinPred		1.0	D
GERP RS		5.6
Varity_R		0.98
gMVP		0.99
Mutation Taster		=0/100	disease causing

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

Other links and lift over

dbSNP: rs886041115; hg19: chr17-59555995;