17-3663869-A-G

Position:

• chr17-3663869-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_014604.4(TAX1BP3):​c.254T>C​(p.Met85Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000343 in 1,456,318 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: TAX1BP3 NM_014604.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.09

Genes affected

TAX1BP3 (HGNC:30684): (Tax1 binding protein 3) This gene encodes a small, highly conserved protein with a single PDZ domain. PDZ (PSD-95/Discs large/ZO-1 homologous) domains promote protein-protein interactions that affect cell signaling, adhesion, protein scaffolding, and receptor and ion transporter functions. The encoded protein interacts with a large number of target proteins that play roles in signaling pathways; for example, it interacts with Rho A and glutaminase L and also acts as a negative regulator of the Wnt/beta-catenin signaling pathway. This protein was first identified as binding to the T-cell leukaemia virus (HTLV1) Tax oncoprotein. Overexpression of this gene has been implicated in altered cancer cell adhesion, migration and metastasis. The encoded protein also modulates the localization and density of inwardly rectifying potassium channel 2.3 (Kir2.3). To date, this protein has been shown to play a role in cell proliferation, development, stress response, and polarization. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Apr 2017]

P2RX5-TAX1BP3 (HGNC:49191): (P2RX5-TAX1BP3 readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring P2RX5 (purinergic receptor P2X, ligand-gated ion channel, 5) and TAX1BP3 (Tax1 binding protein 3) genes on chromosome 17. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is thus unlikely to produce a protein product. [provided by RefSeq, Mar 2011]

P2RX5-TAX1BP3 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.87

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TAX1BP3	NM_014604.4	c.254T>C	p.Met85Thr	missense_variant	4/4	ENST00000225525.4	NP_055419.1
TAX1BP3	NM_001204698.2	c.176T>C	p.Met59Thr	missense_variant	3/3		NP_001191627.1
P2RX5-TAX1BP3	NR_037928.1	n.5309T>C		non_coding_transcript_exon_variant	15/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TAX1BP3	ENST00000225525.4	c.254T>C	p.Met85Thr	missense_variant	4/4	1	NM_014604.4	ENSP00000225525.3
P2RX5-TAX1BP3	ENST00000550383.1	n.*3611T>C		non_coding_transcript_exon_variant	15/15	2		ENSP00000455681.1
P2RX5-TAX1BP3	ENST00000550383.1	n.*3611T>C		3_prime_UTR_variant	15/15	2		ENSP00000455681.1
TAX1BP3	ENST00000611779.4	c.176T>C	p.Met59Thr	missense_variant	3/3	2		ENSP00000484776.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000343 AC: 5 AN: 1456318 Hom.: 0 Cov.: 31 AF XY: 0.00000276 AC XY: 2 AN XY: 724630

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: 0.00000450

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 13, 2024

The c.254T>C (p.M85T) alteration is located in exon 4 (coding exon 4) of the TAX1BP3 gene. This alteration results from a T to C substitution at nucleotide position 254, causing the methionine (M) at amino acid position 85 to be replaced by a threonine (T). 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	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.066	.;T
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.54
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.89	D;D
M_CAP	Benign	0.066	D
MetaRNN	Pathogenic	0.87	D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.015	.;N
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-2.8	.;D
REVEL	Uncertain	0.59
Sift	Uncertain	0.021	.;D
Sift4G	Uncertain	0.025	D;D
Polyphen		0.97	.;D
Vest4		0.83
MutPred		0.78		.;Loss of MoRF binding (P = 0.0867);
MVP		0.64
MPC		1.3
ClinPred		0.97	D
GERP RS		5.0
Varity_R		0.70
gMVP		0.79

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: rs1363994230; hg19: chr17-3567163;