6-24174896-T-C

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_016356.5(DCDC2):c.1327-62A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.2 in 998,074 control chromosomes in the GnomAD database, including 24,239 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.20 (3584 hom., cov: 32)
  • Exomes 𝑓: 0.20 (20655 hom.)
• Consequence: DCDC2 NM_016356.5 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.655

Genes affected

DCDC2 (HGNC:18141): (doublecortin domain containing 2) This gene encodes a doublecortin domain-containing family member. The doublecortin domain has been demonstrated to bind tubulin and enhance microtubule polymerization. This family member is thought to function in neuronal migration where it may affect the signaling of primary cilia. Mutations in this gene have been associated with reading disability (RD) type 2, also referred to as developmental dyslexia. Alternatively spliced transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jan 2013]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.65).
• BP6: Variant 6-24174896-T-C is Benign according to our data. Variant chr6-24174896-T-C is described in ClinVar as [Benign]. Clinvar id is 682615.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.574 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DCDC2	NM_016356.5	c.1327-62A>G		intron_variant		ENST00000378454.8
DCDC2	NM_001195610.2	c.1327-62A>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DCDC2	ENST00000378454.8	c.1327-62A>G		intron_variant		1	NM_016356.5	P1
DCDC2	ENST00000378450.6	c.586-62A>G		intron_variant		1

Frequencies

GnomAD3 genomes AF: 0.201 AC: 30487 AN: 151882 Hom.: 3581 Cov.: 32

Gnomad AFR AF: 0.182

Gnomad AMI AF: 0.103

Gnomad AMR AF: 0.231

Gnomad ASJ AF: 0.235

Gnomad EAS AF: 0.591

Gnomad SAS AF: 0.293

Gnomad FIN AF: 0.166

Gnomad MID AF: 0.155

Gnomad NFE AF: 0.175

Gnomad OTH AF: 0.176

GnomAD4 exome AF: 0.199 AC: 168717 AN: 846076 Hom.: 20655 AF XY: 0.201 AC XY: 87306 AN XY: 434310

Gnomad4 AFR exome AF: 0.191

Gnomad4 AMR exome AF: 0.306

Gnomad4 ASJ exome AF: 0.241

Gnomad4 EAS exome AF: 0.562

Gnomad4 SAS exome AF: 0.284

Gnomad4 FIN exome AF: 0.170

Gnomad4 NFE exome AF: 0.169

Gnomad4 OTH exome AF: 0.213

GnomAD4 genome AF: 0.201 AC: 30518 AN: 151998 Hom.: 3584 Cov.: 32 AF XY: 0.205 AC XY: 15249 AN XY: 74296

Gnomad4 AFR AF: 0.182

Gnomad4 AMR AF: 0.231

Gnomad4 ASJ AF: 0.235

Gnomad4 EAS AF: 0.591

Gnomad4 SAS AF: 0.292

Gnomad4 FIN AF: 0.166

Gnomad4 NFE AF: 0.175

Gnomad4 OTH AF: 0.180

Alfa AF: 0.187 Hom.: 679

Bravo AF: 0.207

Asia WGS AF: 0.406 AC: 1409 AN: 3476

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jun 16, 2018

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.65
Cadd	Benign	7.4
Dann	Benign	0.87

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: rs3789219; hg19: chr6-24175124; COSMIC: COSV65828376;