14-58645315-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000335867.4(DACT1):c.692C>A(p.Ala231Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: DACT1 ENST00000335867.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.828

Genes affected

DACT1 (HGNC:17748): (dishevelled binding antagonist of beta catenin 1) The protein encoded by this gene belongs to the dapper family, characterized by the presence of PDZ-binding motif at the C-terminus. It interacts with, and positively regulates dishevelled-mediated signaling pathways during development. Depletion of this mRNA from xenopus embryos resulted in loss of notochord and head structures, and mice lacking this gene died shortly after birth from severe posterior malformations. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2012]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.063449115).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DACT1	NM_001079520.2	c.635-54C>A		intron_variant		ENST00000395153.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DACT1	ENST00000395153.8	c.635-54C>A		intron_variant		5	NM_001079520.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461886 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727244

Gnomad4 AFR exome AF: 0.0000896

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

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

Sep 14, 2022

The c.692C>A (p.A231E) alteration is located in exon 4 (coding exon 4) of the DACT1 gene. This alteration results from a C to A substitution at nucleotide position 692, causing the alanine (A) at amino acid position 231 to be replaced by a glutamic acid (E). 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	0.14
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.45
Cadd	Benign	19
Dann	Benign	0.92
DEOGEN2	Benign	0.16	T
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.20
FATHMM_MKL	Benign	0.52	D
LIST_S2	Benign	0.69	T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.063	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.0	M
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.29	T
PROVEAN	Benign	-0.020	N
REVEL	Benign	0.035
Sift	Benign	0.95	T
Sift4G	Benign	1.0	T
Polyphen		0.18	B
Vest4		0.19
MutPred		0.35		Gain of disorder (P = 0.0331);
MVP		0.46
MPC		0.25
ClinPred		0.12	T
GERP RS		2.4
Varity_R		0.047
gMVP		0.14

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs773303953; hg19: chr14-59112033;