chr17-65549521-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The NM_004655.4(AXIN2):​c.955G>A​(p.Val319Ile) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000868 in 1,612,576 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

AXIN2
NM_004655.4 missense, splice_region

Scores

2
7
9
Splicing: ADA: 0.9743
1
1

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 7.67
Variant links:
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]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4
Computational evidence support a benign effect (MetaRNN=0.37485537).
BS2
High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
AXIN2NM_004655.4 linkuse as main transcriptc.955G>A p.Val319Ile missense_variant, splice_region_variant 3/11 ENST00000307078.10 NP_004646.3

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
AXIN2ENST00000307078.10 linkuse as main transcriptc.955G>A p.Val319Ile missense_variant, splice_region_variant 3/111 NM_004655.4 ENSP00000302625 P1
AXIN2ENST00000375702.5 linkuse as main transcriptc.955G>A p.Val319Ile missense_variant, splice_region_variant 2/91 ENSP00000364854
AXIN2ENST00000618960.4 linkuse as main transcriptc.955G>A p.Val319Ile missense_variant, splice_region_variant 3/105 ENSP00000478916

Frequencies

GnomAD3 genomes
AF:
0.0000394
AC:
6
AN:
152212
Hom.:
0
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.000145
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
GnomAD3 exomes
AF:
0.00000402
AC:
1
AN:
248566
Hom.:
0
AF XY:
0.00
AC XY:
0
AN XY:
134340
show subpopulations
Gnomad AFR exome
AF:
0.0000626
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.00
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.00000548
AC:
8
AN:
1460364
Hom.:
0
Cov.:
32
AF XY:
0.00000551
AC XY:
4
AN XY:
726308
show subpopulations
Gnomad4 AFR exome
AF:
0.000150
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
9.00e-7
Gnomad4 OTH exome
AF:
0.0000331
GnomAD4 genome
AF:
0.0000394
AC:
6
AN:
152212
Hom.:
0
Cov.:
32
AF XY:
0.0000134
AC XY:
1
AN XY:
74368
show subpopulations
Gnomad4 AFR
AF:
0.000145
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
Alfa
AF:
0.000142
Hom.:
0
Bravo
AF:
0.0000529

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Uncertain:2
Uncertain significance, criteria provided, single submitterclinical testingQuest Diagnostics Nichols Institute San Juan CapistranoAug 15, 2021- -
Uncertain significance, criteria provided, single submitterclinical testingGeneDxNov 02, 2023Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Oligodontia-cancer predisposition syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpJan 02, 2024This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 319 of the AXIN2 protein (p.Val319Ile). 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. This variant has not been reported in the literature in individuals affected with AXIN2-related conditions. ClinVar contains an entry for this variant (Variation ID: 464651). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -
Colorectal cancer;C1837750:Oligodontia-cancer predisposition syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingFulgent Genetics, Fulgent GeneticsMay 31, 2022- -
Colorectal cancer Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingBaylor GeneticsNov 13, 2023- -
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingAmbry GeneticsOct 21, 2022The p.V319I variant (also known as c.955G>A), located in coding exon 2 of the AXIN2 gene, results from a G to A substitution at nucleotide position 955. The valine at codon 319 is replaced by isoleucine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.11
BayesDel_addAF
Uncertain
0.040
T
BayesDel_noAF
Benign
-0.18
CADD
Pathogenic
26
DANN
Uncertain
1.0
DEOGEN2
Benign
0.30
.;T;T
Eigen
Uncertain
0.61
Eigen_PC
Pathogenic
0.69
FATHMM_MKL
Pathogenic
0.99
D
LIST_S2
Uncertain
0.93
.;D;.
M_CAP
Benign
0.063
D
MetaRNN
Benign
0.37
T;T;T
MetaSVM
Uncertain
0.021
D
MutationTaster
Benign
1.0
D;D
PrimateAI
Uncertain
0.67
T
PROVEAN
Benign
-0.75
N;.;N
REVEL
Uncertain
0.36
Sift
Benign
0.065
T;.;T
Sift4G
Benign
0.20
T;T;T
Polyphen
0.98
.;D;D
Vest4
0.52
MutPred
0.10
Gain of glycosylation at S318 (P = 0.1254);Gain of glycosylation at S318 (P = 0.1254);Gain of glycosylation at S318 (P = 0.1254);
MVP
0.70
MPC
0.47
ClinPred
0.55
D
GERP RS
5.9
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.0
gMVP
0.20

Splicing

Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
0.97
dbscSNV1_RF
Benign
0.66
SpliceAI score (max)
0.070
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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs913060347; hg19: chr17-63545639; API