17-65537780-G-C

Variant names:

• chr17-65537780-G-C
• rs759790948
• NM_004655.4:c.1256C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004655.4(AXIN2):​c.1256C>G​(p.Thr419Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign 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. T419A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: AXIN2 NM_004655.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.869
• 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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.084611416).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AXIN2	NM_004655.4	c.1256C>G	p.Thr419Arg	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.1256C>G	p.Thr419Arg	missense_variant	Exon 6 of 11	1	NM_004655.4	ENSP00000302625.5
AXIN2	ENST00000375702.5	c.1256C>G	p.Thr419Arg	missense_variant	Exon 5 of 9	1		ENSP00000364854.5
AXIN2	ENST00000618960.4	c.1256C>G	p.Thr419Arg	missense_variant	Exon 6 of 10	5		ENSP00000478916.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 37

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Colorectal cancer Uncertain:1

Jun 06, 2023

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.099
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	7.7
DANN	Benign	0.60
DEOGEN2	Benign	0.24	.;T;T
Eigen	Benign	-0.85
Eigen_PC	Benign	-0.79
FATHMM_MKL	Benign	0.22	N
LIST_S2	Benign	0.68	.;T;.
M_CAP	Uncertain	0.25	D
MetaRNN	Benign	0.085	T;T;T
MetaSVM	Benign	-0.77	T
PhyloP100		0.87
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-0.33	N;.;N
REVEL	Benign	0.15
Sift	Benign	0.18	T;.;T
Sift4G	Benign	0.63	T;T;T
Polyphen		0.029	.;B;B
Vest4		0.18
MutPred		0.32		Gain of solvent accessibility (P = 1e-04);Gain of solvent accessibility (P = 1e-04);Gain of solvent accessibility (P = 1e-04);
MVP		0.53
MPC		0.23
ClinPred		0.066	T
GERP RS		2.9
gMVP		0.13
Mutation Taster		=97/3	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: rs759790948; hg19: chr17-63533898;