rs9460976

Variant names:

• chr6-24212892-G-A
• rs9460976
• NM_016356.5:c.923-7790C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_016356.5(DCDC2):​c.923-7790C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.11 in 152,154 control chromosomes in the GnomAD database, including 1,004 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.11 (1004 hom., cov: 32)
• Consequence: DCDC2 NM_016356.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.78
• Publications: 1 publications found

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]

DCDC2 Gene-Disease associations (from GenCC):

• ciliopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen, Ambry Genetics
• isolated neonatal sclerosing cholangitis

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• nephronophthisis 19

  Inheritance: AR Classification: STRONG Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Senior-Boichis syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen
• autosomal recessive nonsyndromic hearing loss 66

  Inheritance: Unknown, AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.122 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DCDC2	NM_016356.5	c.923-7790C>T		intron_variant	Intron 7 of 9	ENST00000378454.8	NP_057440.2
DCDC2	NM_001195610.2	c.923-7790C>T		intron_variant	Intron 8 of 10		NP_001182539.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DCDC2	ENST00000378454.8	c.923-7790C>T		intron_variant	Intron 7 of 9	1	NM_016356.5	ENSP00000367715.3

Frequencies

GnomAD3 genomes AF: 0.110 AC: 16721 AN: 152036 Hom.: 1004 Cov.: 32

Gnomad AFR AF: 0.125

Gnomad AMI AF: 0.266

Gnomad AMR AF: 0.0904

Gnomad ASJ AF: 0.147

Gnomad EAS AF: 0.0456

Gnomad SAS AF: 0.112

Gnomad FIN AF: 0.0488

Gnomad MID AF: 0.149

Gnomad NFE AF: 0.115

Gnomad OTH AF: 0.127

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.110 AC: 16737 AN: 152154 Hom.: 1004 Cov.: 32 AF XY: 0.106 AC XY: 7878 AN XY: 74372

African (AFR) AF: 0.125 AC: 5174 AN: 41504

American (AMR) AF: 0.0903 AC: 1381 AN: 15300

Ashkenazi Jewish (ASJ) AF: 0.147 AC: 510 AN: 3466

East Asian (EAS) AF: 0.0455 AC: 235 AN: 5166

South Asian (SAS) AF: 0.113 AC: 545 AN: 4808

European-Finnish (FIN) AF: 0.0488 AC: 517 AN: 10600

Middle Eastern (MID) AF: 0.160 AC: 47 AN: 294

European-Non Finnish (NFE) AF: 0.115 AC: 7816 AN: 67990

Other (OTH) AF: 0.127 AC: 269 AN: 2114

Alfa AF: 0.119 Hom.: 362

Bravo AF: 0.115

Asia WGS AF: 0.0820 AC: 284 AN: 3474

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.022
DANN	Benign	0.39
PhyloP100		-1.8
Mutation Taster		=100/0	polymorphism (auto)

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: rs9460976; hg19: chr6-24213120;