chr17-65537046-G-A

Position:

• chr17-65537046-G-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.1730C>T​(p.Thr577Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,454,800 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 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)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: AXIN2 NM_004655.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.54

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.15553707).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AXIN2	NM_004655.4	c.1730C>T	p.Thr577Ile	missense_variant	7/11	ENST00000307078.10	NP_004646.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AXIN2	ENST00000307078.10	c.1730C>T	p.Thr577Ile	missense_variant	7/11	1	NM_004655.4	ENSP00000302625	P1
AXIN2	ENST00000375702.5	c.1712+278C>T		intron_variant		1		ENSP00000364854
AXIN2	ENST00000618960.4	c.1712+278C>T		intron_variant		5		ENSP00000478916

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000417 AC: 1 AN: 239708 Hom.: 0 AF XY: 0.00000764 AC XY: 1 AN XY: 130840

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000328

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1454800 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 723944

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: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Oligodontia-cancer predisposition syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 10, 2023

This sequence change replaces threonine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 577 of the AXIN2 protein (p.Thr577Ile). 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. 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt AXIN2 protein function. ClinVar contains an entry for this variant (Variation ID: 579603). This variant has not been reported in the literature in individuals affected with AXIN2-related conditions. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.098
BayesDel_addAF	Benign	-0.044	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	22
DANN	Uncertain	0.99
Eigen	Benign	-0.20
Eigen_PC	Benign	-0.11
FATHMM_MKL	Uncertain	0.88	D
M_CAP	Uncertain	0.10	D
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-0.83	T
MutationTaster	Benign	0.78	D;D
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.076
Sift	Benign	0.030	D
Sift4G	Benign	0.083	T
Vest4		0.36
MutPred		0.19		Loss of phosphorylation at T577 (P = 0.005);
MVP		0.52
MPC		0.24
ClinPred		0.51	D
GERP RS		3.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.8
gMVP		0.36

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs760939811; hg19: chr17-63533164; COSMIC: COSV61055846; COSMIC: COSV61055846;