17-65558568-C-T

Variant names:

• chr17-65558568-C-T
• rs878854732
• NM_004655.4:c.53G>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004655.4(AXIN2):​c.53G>A​(p.Arg18His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: AXIN2 NM_004655.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 1.99

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]

ENSG00000266076 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14588088).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AXIN2	NM_004655.4	c.53G>A	p.Arg18His	missense_variant	Exon 2 of 11	ENST00000307078.10	NP_004646.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AXIN2	ENST00000307078.10	c.53G>A	p.Arg18His	missense_variant	Exon 2 of 11	1	NM_004655.4	ENSP00000302625.5
ENSG00000266076	ENST00000577662.1	n.*229G>A		non_coding_transcript_exon_variant	Exon 4 of 7	2		ENSP00000462418.1
ENSG00000266076	ENST00000577662.1	n.*229G>A		3_prime_UTR_variant	Exon 4 of 7	2		ENSP00000462418.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Oligodontia-cancer predisposition syndrome Uncertain:1

Jan 15, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 18 of the AXIN2 protein (p.Arg18His). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with AXIN2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1039849). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt AXIN2 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Hereditary cancer-predisposing syndrome Uncertain:1

May 04, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R18H variant (also known as c.53G>A), located in coding exon 1 of the AXIN2 gene, results from a G to A substitution at nucleotide position 53. The arginine at codon 18 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. 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	0.075
BayesDel_addAF	Benign	-0.028	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	19
DANN	Benign	0.88
DEOGEN2	Benign	0.32	.;.;T;T;T;.;.;.
Eigen	Benign	-0.49
Eigen_PC	Benign	-0.43
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.82	.;T;T;.;T;T;T;T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.15	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.64	T
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-1.7	N;.;.;N;.;.;.;N
REVEL	Benign	0.14
Sift	Benign	0.15	T;.;.;T;.;.;.;T
Sift4G	Benign	0.064	T;T;T;T;.;.;.;.
Polyphen		0.012	.;.;B;B;.;.;.;.
Vest4		0.15
MutPred		0.13		Gain of glycosylation at S15 (P = 0.0846);Gain of glycosylation at S15 (P = 0.0846);Gain of glycosylation at S15 (P = 0.0846);Gain of glycosylation at S15 (P = 0.0846);Gain of glycosylation at S15 (P = 0.0846);Gain of glycosylation at S15 (P = 0.0846);Gain of glycosylation at S15 (P = 0.0846);Gain of glycosylation at S15 (P = 0.0846);
MVP		0.66
MPC		0.26
ClinPred		0.19	T
GERP RS		1.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.23

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: rs878854732; hg19: chr17-63554686;