11-12002346-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001018057.2(DKK3):c.305C>T(p.Thr102Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000434 in 1,614,054 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00017 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000030 (0 hom.)
• Consequence: DKK3 NM_001018057.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.21

Genes affected

DKK3 (HGNC:2893): (dickkopf WNT signaling pathway inhibitor 3) This gene encodes a protein that is a member of the dickkopf family. The secreted protein contains two cysteine rich regions and is involved in embryonic development through its interactions with the Wnt signaling pathway. The expression of this gene is decreased in a variety of cancer cell lines and it may function as a tumor suppressor gene. Alternative splicing results in multiple transcript variants encoding the same protein. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1039004).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DKK3	NM_001018057.2	c.305C>T	p.Thr102Met	missense_variant	2/7	ENST00000683431.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DKK3	ENST00000683431.1	c.305C>T	p.Thr102Met	missense_variant	2/7		NM_001018057.2	P1

Frequencies

GnomAD3 genomes AF: 0.000171 AC: 26 AN: 152138 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000944

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000716 AC: 18 AN: 251410 Hom.: 0 AF XY: 0.0000589 AC XY: 8 AN XY: 135888

Gnomad AFR exome AF: 0.000492

Gnomad AMR exome AF: 0.000260

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: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000301 AC: 44 AN: 1461798 Hom.: 0 Cov.: 31 AF XY: 0.0000275 AC XY: 20 AN XY: 727184

Gnomad4 AFR exome AF: 0.000358

Gnomad4 AMR exome AF: 0.000201

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: 0.0000171

Gnomad4 OTH exome AF: 0.0000662

GnomAD4 genome AF: 0.000171 AC: 26 AN: 152256 Hom.: 0 Cov.: 32 AF XY: 0.000188 AC XY: 14 AN XY: 74434

Gnomad4 AFR AF: 0.000481

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000944

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000193 Hom.: 0

Bravo AF: 0.000174

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.0000576 AC: 7

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 07, 2023

The c.305C>T (p.T102M) alteration is located in exon 3 (coding exon 2) of the DKK3 gene. This alteration results from a C to T substitution at nucleotide position 305, causing the threonine (T) at amino acid position 102 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.094
BayesDel_addAF	Benign	-0.27	T
BayesDel_noAF	Benign	-0.26
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.30	T;T;.;T;.;.
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Benign	0.73	D
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.10	T;T;T;T;T;T
MetaSVM	Benign	-0.50	T
MutationAssessor	Uncertain	2.1	M;M;.;.;.;.
MutationTaster	Benign	0.55	D;D;D;D
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-2.2	N;N;N;N;D;D
REVEL	Benign	0.17
Sift	Uncertain	0.014	D;D;D;D;D;D
Sift4G	Benign	0.11	T;T;T;.;.;D
Polyphen		0.97	D;D;D;.;.;.
Vest4		0.46
MVP		0.71
MPC		1.0
ClinPred		0.092	T
GERP RS		4.6
Varity_R		0.050
gMVP		0.37

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: rs372782687; hg19: chr11-12023893;