17-65537648-C-T

Variant names:

• chr17-65537648-C-T
• rs1060502150
• NM_004655.4:c.1388G>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004655.4(AXIN2):​c.1388G>A​(p.Arg463His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000014 in 1,423,608 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R463L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: AXIN2 NM_004655.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.41
• Publications: 0 publications found

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]

AXIN2 Gene-Disease associations (from GenCC):

• oligodontia-cancer predisposition syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• tooth agenesis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• craniosynostosis

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AXIN2	NM_004655.4	c.1388G>A	p.Arg463His	missense_variant	Exon 6 of 11	ENST00000307078.10	NP_004646.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AXIN2	ENST00000307078.10	c.1388G>A	p.Arg463His	missense_variant	Exon 6 of 11	1	NM_004655.4	ENSP00000302625.5
AXIN2	ENST00000375702.5	c.1388G>A	p.Arg463His	missense_variant	Exon 5 of 9	1		ENSP00000364854.5
AXIN2	ENST00000618960.4	c.1388G>A	p.Arg463His	missense_variant	Exon 6 of 10	5		ENSP00000478916.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000536 AC: 1 AN: 186498 AF XY: 0.00000998

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000714

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000140 AC: 2 AN: 1423608 Hom.: 0 Cov.: 37 AF XY: 0.00000142 AC XY: 1 AN XY: 705258

African (AFR) AF: 0.00 AC: 0 AN: 33034

American (AMR) AF: 0.00 AC: 0 AN: 37876

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25526

East Asian (EAS) AF: 0.0000261 AC: 1 AN: 38372

South Asian (SAS) AF: 0.00 AC: 0 AN: 83398

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 45538

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5620

European-Non Finnish (NFE) AF: 9.13e-7 AC: 1 AN: 1095040

Other (OTH) AF: 0.00 AC: 0 AN: 59204

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Oligodontia-cancer predisposition syndrome Uncertain:1

Dec 28, 2024

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 463 of the AXIN2 protein (p.Arg463His). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. 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: 571823). 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) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on AXIN2 protein function. 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

Mar 03, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R463H variant (also known as c.1388G>A), located in coding exon 5 of the AXIN2 gene, results from a G to A substitution at nucleotide position 1388. The arginine at codon 463 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. 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	0.15
BayesDel_addAF	Uncertain	0.092	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	24
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.34	.;T;T
Eigen	Uncertain	0.38
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.99	.;D;.
M_CAP	Pathogenic	0.62	D
MetaRNN	Uncertain	0.53	D;D;D
MetaSVM	Benign	-0.36	T
PhyloP100		2.4
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-2.3	N;.;N
REVEL	Benign	0.27
Sift	Uncertain	0.014	D;.;D
Sift4G	Benign	0.25	T;T;T
Polyphen		1.0	.;D;D
Vest4		0.48
MutPred		0.64		Loss of glycosylation at P462 (P = 0.0853);Loss of glycosylation at P462 (P = 0.0853);Loss of glycosylation at P462 (P = 0.0853);
MVP		0.61
MPC		0.75
ClinPred		0.74	D
GERP RS		5.1
gMVP		0.39
Mutation Taster		=52/48	polymorphism

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: rs1060502150; hg19: chr17-63533766;