rs1060502144

chr17-65537669-C-Gchr17-65537669-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_004655.4(AXIN2):c.1367G>C(p.Gly456Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000658 in 151,986 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G456D) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
• Consequence: AXIN2 NM_004655.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.61

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 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.798

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AXIN2	NM_004655.4	c.1367G>C	p.Gly456Ala	missense_variant	6/11	ENST00000307078.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AXIN2	ENST00000307078.10	c.1367G>C	p.Gly456Ala	missense_variant	6/11	1	NM_004655.4	P1
AXIN2	ENST00000375702.5	c.1367G>C	p.Gly456Ala	missense_variant	5/9	1
AXIN2	ENST00000618960.4	c.1367G>C	p.Gly456Ala	missense_variant	6/10	5

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151986 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 82

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151986 Hom.: 0 Cov.: 33 AF XY: 0.0000135 AC XY: 1 AN XY: 74202

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

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

Invitae

Aug 02, 2016

In summary, this variant is a novel missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a AXIN2-related disease. This sequence change replaces glycine with alanine at codon 456 of the AXIN2 protein (p.Gly456Ala). The glycine residue is highly conserved and there is a small physicochemical difference between glycine and alanine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Uncertain	0.021	T
BayesDel_noAF	Benign	-0.21
Cadd	Benign	23
Dann	Uncertain	0.97
Eigen	Uncertain	0.32
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Pathogenic	0.97	D
M_CAP	Pathogenic	0.56	D
MetaRNN	Pathogenic	0.80	D;D;D
MetaSVM	Uncertain	-0.20	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Uncertain	-2.7	D;.;D
REVEL	Uncertain	0.30
Sift	Benign	0.048	D;.;D
Sift4G	Benign	0.077	T;T;T
Polyphen		0.43	.;B;B
Vest4		0.62
MutPred		0.68		Gain of glycosylation at S461 (P = 0.118);Gain of glycosylation at S461 (P = 0.118);Gain of glycosylation at S461 (P = 0.118);
MVP		0.75
MPC		0.23
ClinPred		0.87	D
GERP RS		5.1
gMVP		0.44

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: rs1060502144; hg19: chr17-63533787;