rs1555883338

Positions:

• chr17-61478745-CCTT-C

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1 PM2 PM4_Supporting PP5_Moderate

The NM_001321120.2(TBX4):​c.670_672del​(p.Phe224del) variant causes a inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TBX4 NM_001321120.2 inframe_deletion
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 8.02

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM1: In a DNA_binding_region T-box (size 180) in uniprot entity TBX4_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in NM_001321120.2
• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_001321120.2. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant 17-61478745-CCTT-C is Pathogenic according to our data. Variant chr17-61478745-CCTT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 548697.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TBX4	NM_001321120.2	c.670_672del	p.Phe224del	inframe_deletion	6/9	ENST00000644296.1	NP_001308049.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TBX4	ENST00000644296.1	c.670_672del	p.Phe224del	inframe_deletion	6/9		NM_001321120.2	ENSP00000495986	A1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Pulmonary arterial hypertension associated with congenital heart disease Pathogenic:1

Likely pathogenic, criteria provided, single submitter

case-control

Wendy Chung Laboratory, Columbia University Medical Center

Jun 27, 2018

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Computational scores

Source: dbNSFP v4.3

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: rs1555883338; hg19: chr17-59556106;