rs771093792

chr17-65558523-G-Achr17-65558523-G-Cchr17-65558523-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_004655.4(AXIN2):c.98C>T(p.Thr33Ile) 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 benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T33N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: AXIN2 NM_004655.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.97

Genes affected

AXIN2 (HGNC:904): (axin 2) The Axin-related protein, Axin2, presumably plays an important role in the regulation of the stability of beta-catenin in the Wnt signaling pathway, like its rodent homologs, mouse conductin/rat axil. In mouse, conductin organizes a multiprotein complex of APC (adenomatous polyposis of the colon), beta-catenin, glycogen synthase kinase 3-beta, and conductin, which leads to the degradation of beta-catenin. Apparently, the deregulation of beta-catenin is an important event in the genesis of a number of malignancies. The AXIN2 gene has been mapped to 17q23-q24, a region that shows frequent loss of heterozygosity in breast cancer, neuroblastoma, and other tumors. Mutations in this gene have been associated with colorectal cancer with defective mismatch repair. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2674349).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AXIN2	NM_004655.4	c.98C>T	p.Thr33Ile	missense_variant	2/11	ENST00000307078.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AXIN2	ENST00000307078.10	c.98C>T	p.Thr33Ile	missense_variant	2/11	1	NM_004655.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 07, 2022

The p.T33I variant (also known as c.98C>T), located in coding exon 1 of the AXIN2 gene, results from a C to T substitution at nucleotide position 98. The threonine at codon 33 is replaced by isoleucine, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
Cadd	Uncertain	24
Dann	Benign	0.92
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.88	D
M_CAP	Benign	0.035	D
MetaRNN	Benign	0.27	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.45	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-1.2	N;.;.;N;.;.;.;N
REVEL	Benign	0.14
Sift	Benign	0.11	T;.;.;T;.;.;.;T
Sift4G	Benign	0.066	T;T;T;T;.;.;.;.
Polyphen		0.91	.;.;P;P;.;.;.;.
Vest4		0.51
MutPred		0.21		Loss of phosphorylation at T33 (P = 0.0036);Loss of phosphorylation at T33 (P = 0.0036);Loss of phosphorylation at T33 (P = 0.0036);Loss of phosphorylation at T33 (P = 0.0036);Loss of phosphorylation at T33 (P = 0.0036);Loss of phosphorylation at T33 (P = 0.0036);Loss of phosphorylation at T33 (P = 0.0036);Loss of phosphorylation at T33 (P = 0.0036);
MVP		0.65
MPC		0.44
ClinPred		0.91	D
GERP RS		3.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.17

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: chr17-63554641; COSMIC: COSV105880565;