17-65557922-C-G

Position:

• chr17-65557922-C-G

Variant summary

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

The NM_004655.4(AXIN2):​c.699G>C​(p.Glu233Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. E233K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: AXIN2 NM_004655.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.915

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/exons	MANE	UniProt
AXIN2	NM_004655.4	c.699G>C	p.Glu233Asp	missense_variant	2/11	ENST00000307078.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AXIN2	ENST00000307078.10	c.699G>C	p.Glu233Asp	missense_variant	2/11	1	NM_004655.4	P1
AXIN2	ENST00000375702.5	c.699G>C	p.Glu233Asp	missense_variant	1/9	1
AXIN2	ENST00000618960.4	c.699G>C	p.Glu233Asp	missense_variant	2/10	5
AXIN2	ENST00000577278.1	c.699G>C	p.Glu233Asp	missense_variant	2/2	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Sep 15, 2021

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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with AXIN2-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces glutamic acid with aspartic acid at codon 233 of the AXIN2 protein (p.Glu233Asp). The glutamic acid residue is highly conserved and there is a small physicochemical difference between glutamic acid and aspartic acid. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Uncertain	0.052	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	22
DANN	Benign	0.89
DEOGEN2	Uncertain	0.57	.;D;D;T
Eigen	Uncertain	0.30
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.87	.;D;.;D
M_CAP	Benign	0.043	D
MetaRNN	Uncertain	0.45	T;T;T;T
MetaSVM	Uncertain	-0.070	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.70	T
PROVEAN	Uncertain	-2.7	D;.;D;.
REVEL	Uncertain	0.43
Sift	Uncertain	0.0050	D;.;D;.
Sift4G	Uncertain	0.010	D;D;D;.
Polyphen		0.99	.;D;D;.
Vest4		0.55
MutPred		0.38		Loss of catalytic residue at E233 (P = 0.0388);Loss of catalytic residue at E233 (P = 0.0388);Loss of catalytic residue at E233 (P = 0.0388);Loss of catalytic residue at E233 (P = 0.0388);
MVP		0.56
MPC		0.68
ClinPred		0.95	D
GERP RS		0.92
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.74

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-63554040;