NM_004655.4:c.1891A>G

Variant names:

• chr17-65536885-T-C
• rs1555577360
• NM_004655.4:c.1891A>G

Variant summary

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

The NM_004655.4(AXIN2):​c.1891A>G​(p.Lys631Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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: 4.61

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 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.1891A>G	p.Lys631Glu	missense_variant	Exon 7 of 11	ENST00000307078.10	NP_004646.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AXIN2	ENST00000307078.10	c.1891A>G	p.Lys631Glu	missense_variant	Exon 7 of 11	1	NM_004655.4	ENSP00000302625.5
AXIN2	ENST00000375702.5	c.1713-332A>G		intron_variant	Intron 5 of 8	1		ENSP00000364854.5
AXIN2	ENST00000618960.4	c.1713-332A>G		intron_variant	Intron 6 of 9	5		ENSP00000478916.1
AXIN2	ENST00000578251.1	n.-203A>G		upstream_gene_variant		3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

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

Apr 19, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ClinVar contains an entry for this variant (Variation ID: 464578). 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. 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. This variant has not been reported in the literature in individuals affected with AXIN2-related conditions. This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 631 of the AXIN2 protein (p.Lys631Glu). This variant is not present in population databases (gnomAD no frequency). -

Hereditary cancer-predisposing syndrome Uncertain:1

Sep 25, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.K631E variant (also known as c.1891A>G), located in coding exon 6 of the AXIN2 gene, results from an A to G substitution at nucleotide position 1891. The lysine at codon 631 is replaced by glutamic acid, an amino acid with similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.36
BayesDel_addAF	Uncertain	0.056	T
BayesDel_noAF	Benign	-0.16
CADD	Pathogenic	26
DANN	Uncertain	1.0
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.94	D
M_CAP	Uncertain	0.23	D
MetaRNN	Uncertain	0.60	D
MetaSVM	Benign	-0.47	T
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.25
Sift	Uncertain	0.0070	D
Sift4G	Uncertain	0.031	D
Vest4		0.54
MutPred		0.42		Loss of MoRF binding (P = 0.0031);
MVP		0.62
MPC		0.53
ClinPred		0.85	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.39

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: rs1555577360; hg19: chr17-63533003;