Send feedback

DCDC2

gene
On this page

Also known as RU2KIAA1154DCDC2ANPHP19

Summary

DCDC2 (doublecortin domain containing 2, HGNC:18141) is a protein-coding gene on chromosome 6p22.3, encoding Doublecortin domain-containing protein 2 (Q9UHG0). Protein that plays a role in the inhibition of canonical Wnt signaling pathway.

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.

Source: NCBI Gene 51473 — RefSeq curated summary.

At a glance

  • Gene–disease (curated): ciliopathy (Definitive, ClinGen) — +6 more curated relationships
  • GWAS associations: 7
  • Clinical variants (ClinVar): 410 total — 14 pathogenic, 16 likely-pathogenic (top 8% of genes corpus-wide)
  • GTEx eGene: eQTL in 24 tissues, sQTL in 1 (q < 0.05)
  • Phenotypes (HPO): 58
  • Constraint (gnomAD): pLI 0.00 (LoF-tolerant), LOEUF 1.06 (unconstrained)
  • MANE Select transcript: NM_016356

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:18141
Approved symbolDCDC2
Namedoublecortin domain containing 2
Location6p22.3
Locus typegene with protein product
StatusApproved
AliasesRU2, KIAA1154, DCDC2A, NPHP19
Ensembl geneENSG00000146038
Ensembl biotypeprotein_coding
OMIM605755
Entrez51473

Gene structure

Transcript identifiers

Ensembl transcripts: 6 — 6 protein_coding

MANE Select: ENST00000378454

Transcript support level (Ensembl TSL; 1 = fully mRNA-supported): TSL 1: 2, TSL 3: 1

ENST00000378454, ENST00000378450, ENST00000436313, ENST00000883243, ENST00001122881, ENST00001136198

RefSeq mRNA: 2 — MANE Select: NM_016356 NM_001195610, NM_016356

CCDS: CCDS4550

Canonical transcript exons

ENST00000378454 — 10 exons

ExonStartEnd
ENSE000009735932427804924278211
ENSE000009735942420500224205102
ENSE000009735952417833024178632
ENSE000009735982430171524301846
ENSE000009735992429093224291078
ENSE000009736002428885224288906
ENSE000010853392435356924353623
ENSE000010853442430196824302044
ENSE000014776082435745824358059
ENSE000038419502417175524174834

Expression profiles

Bgee: expression breadth ubiquitous, 156 present calls, max score 97.71.

FANTOM5 (CAGE): breadth broad, TPM avg 5.4794 / max 474.4203, expressed in 354 samples.

Highest expression (Bgee): secondary oocyte, oocyte, oviduct epithelium, islet of Langerhans, kidney epithelium.

Genetic regulation across tissues (GTEx eQTL / sQTL)

DCDC2 is an eGene in GTEx v10 — its expression is genetically regulated (eQTL) in 24 tissues and its splicing (sQTL) in 1 (q < 0.05). Strongest associations first; slope = normalized effect of the lead variant’s alternative allele.

showing 20 of 25 significant tissue × QTL associations:

TissueQTLq-valueSlopeLead variant
Thyroideqtl2.3e-23+0.346:24297672:T:C
Testissqtl1.2e-14+0.936:24176902:G:A
Pancreaseqtl4.6e-14+0.346:24287323:A:G
Colon Transverseeqtl9.3e-14+0.506:24361852:G:A
Pituitaryeqtl2.7e-11+0.696:24357974:G:A
Brain Nucleus accumbens basal gangliaeqtl1.9e-10+0.446:24203303:G:A
Testiseqtl4.3e-09+0.186:24287323:A:G
Brain Cortexeqtl5.7e-09+0.406:24287323:A:G
Minor Salivary Glandeqtl4.6e-08+0.946:24357974:G:A
Stomacheqtl1.4e-07+0.386:24361852:G:A
Brain Frontal Cortex BA9eqtl1.5e-07+0.386:24260832:T:C
Brain Cerebellar Hemisphereeqtl4.7e-07+0.726:24430019:AACT:A
Lungeqtl1.4e-06-0.256:24335719:A:C
Brain Anterior cingulate cortex BA24eqtl1.0e-05+0.396:24224260:T:C
Brain Caudate basal gangliaeqtl3.9e-05+0.226:24276025:G:A
Skin Sun Exposed Lower legeqtl8.4e-05+0.226:24290975:T:C
Breast Mammary Tissueeqtl7.4e-04+0.166:24278959:C:A
Skin Not Sun Exposed Suprapubiceqtl8.8e-04-0.306:24219932:C:T
Brain Amygdalaeqtl2.5e-03-2.456:24651771:G:C
Small Intestine Terminal Ileumeqtl1.3e-02+0.626:24361852:G:A

FANTOM5 promoters

10 alternative TSS:

Promoter IDTPM avgSamples expressed
721673.1458292
721711.4069229
721700.2482140
721660.1973120
721650.129381
721680.103172
721720.086242
721730.061329
2039080.055534
721690.045724

Top tissues by expression

showing 100 of 248 tissues by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
secondary oocyteCL:000065597.71gold quality
oocyteCL:000002396.15gold quality
oviduct epitheliumUBERON:000480490.24gold quality
islet of LangerhansUBERON:000000687.60gold quality
kidney epitheliumUBERON:000481986.95gold quality
adult mammalian kidneyUBERON:000008286.78gold quality
metanephros cortexUBERON:001053386.43gold quality
caput epididymisUBERON:000435885.47gold quality
kidneyUBERON:000211385.11gold quality
pancreasUBERON:000126484.67gold quality
body of pancreasUBERON:000115084.03gold quality
buccal mucosa cellCL:000233683.09gold quality
metanephrosUBERON:000008181.46gold quality
endometriumUBERON:000129580.82gold quality
bronchial epithelial cellCL:000232880.60gold quality
epithelial cell of pancreasCL:000008379.71silver quality
cortex of kidneyUBERON:000122579.41gold quality
right uterine tubeUBERON:000130279.20gold quality
bronchusUBERON:000218578.80gold quality
pigmented layer of retinaUBERON:000178278.79gold quality
renal medullaUBERON:000036278.59gold quality
endothelial cellCL:000011577.04gold quality
fallopian tubeUBERON:000388975.44gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047373.87gold quality
mucosa of paranasal sinusUBERON:000503073.14gold quality
gall bladderUBERON:000211072.96gold quality
thyroid glandUBERON:000204669.84gold quality
left lobe of thyroid glandUBERON:000112069.81gold quality
corpus epididymisUBERON:000435968.42gold quality
ventricular zoneUBERON:000305367.00gold quality
right lobe of thyroid glandUBERON:000111966.98gold quality
olfactory segment of nasal mucosaUBERON:000538664.65gold quality
deciduaUBERON:000245064.13gold quality
right lungUBERON:000216763.61gold quality
pancreatic ductal cellCL:000207963.57silver quality
amniotic fluidUBERON:000017362.95gold quality
epithelium of mammary glandUBERON:000324462.88gold quality
mammary ductUBERON:000176562.80gold quality
prefrontal cortexUBERON:000045162.48gold quality
mucosa of transverse colonUBERON:000499162.42gold quality
right lobe of liverUBERON:000111461.81gold quality
lungUBERON:000204861.63gold quality
upper lobe of left lungUBERON:000895261.37gold quality
upper lobe of lungUBERON:000894860.95gold quality
testisUBERON:000047360.80gold quality
liverUBERON:000210760.79gold quality
right adrenal gland cortexUBERON:003582760.19gold quality
left testisUBERON:000453359.91gold quality
uterusUBERON:000099559.54gold quality
thoracic mammary glandUBERON:000520058.44gold quality
mammary glandUBERON:000191158.42gold quality
ileal mucosaUBERON:000033158.20silver quality
right testisUBERON:000453458.08gold quality
epithelium of nasopharynxUBERON:000195157.88silver quality
right adrenal glandUBERON:000123357.83gold quality
adenohypophysisUBERON:000219657.69gold quality
hypothalamusUBERON:000189857.67gold quality
pituitary glandUBERON:000000757.36gold quality
Brodmann (1909) area 9UBERON:001354057.29gold quality
seminal vesicleUBERON:000099856.84gold quality
ganglionic eminenceUBERON:000402356.84gold quality
rectumUBERON:000105256.46gold quality
tibialis anteriorUBERON:000138556.36silver quality
visceral pleuraUBERON:000240155.92gold quality
frontal cortexUBERON:000187055.89gold quality
hindlimb stylopod muscleUBERON:000425255.82gold quality
left adrenal glandUBERON:000123455.66gold quality
primordial germ cell in gonadCL:0000670 ∩ UBERON:000099155.39gold quality
colonic epitheliumUBERON:000039755.34gold quality
neocortexUBERON:000195055.03gold quality
adrenal cortexUBERON:000123554.81gold quality
left adrenal gland cortexUBERON:003582554.78gold quality
adrenal glandUBERON:000236954.76gold quality
dorsolateral prefrontal cortexUBERON:000983454.69gold quality
cardiac muscle of right atriumUBERON:000337954.34gold quality
left ventricle myocardiumUBERON:000656654.23gold quality
stomachUBERON:000094554.19gold quality
body of stomachUBERON:000116154.05gold quality
anterior cingulate cortexUBERON:000983553.56gold quality
caudate nucleusUBERON:000187353.54gold quality
upper arm skinUBERON:000426353.52gold quality
nucleus accumbensUBERON:000188253.47gold quality
right frontal lobeUBERON:000281053.33gold quality
left uterine tubeUBERON:000130353.17gold quality
cerebral cortexUBERON:000095653.01gold quality
forebrainUBERON:000189052.73gold quality
nasal cavity mucosaUBERON:000182652.70gold quality
lower lobe of lungUBERON:000894952.64silver quality
adult organismUBERON:000702352.63gold quality
amygdalaUBERON:000187651.65gold quality
cerebellar vermisUBERON:000472051.65gold quality
prostate glandUBERON:000236751.36gold quality
gastrocnemiusUBERON:000138851.23gold quality
muscle of legUBERON:000138351.16gold quality
corpus callosumUBERON:000233651.15gold quality
brainUBERON:000095550.64gold quality
Ammon’s hornUBERON:000195450.29gold quality
myocardiumUBERON:000234950.25gold quality
female reproductive systemUBERON:000047450.22gold quality
placentaUBERON:000198749.64gold quality

Single-cell (SCXA)

Detected in 10 experiment(s), a significant marker in 9.

ExperimentMarker?Max mean expression
E-GEOD-130473yes730.98
E-GEOD-124472yes472.02
E-HCAD-10yes370.24
E-GEOD-83139yes166.07
E-CURD-119yes42.83
E-MTAB-5061yes26.21
E-GEOD-81547yes21.79
E-MTAB-10553yes19.33
E-ANND-3yes12.07
E-MTAB-6386no16.62

HPA expression

RNA tissue specificity: Tissue enhanced

showing 60 of 70 HPA tissues / cells by nTPM:

Tissue / cellAxisnTPMProtein (IHC)
Choroid plexustissue33.0
Pancreastissue24.9medium
Kidneytissue20.4high
Periaqueductal graytissue17.4
Spinal cordtissue15.3
Hippocampal formationtissue15.2
Septumtissue13.9
Hypothalamustissue12.5
Corpus callosumtissue12.2
Basal gangliatissue11.7not detected
Amygdalatissue10.5
Medulla oblongatatissue10.4
Olfactory bulbtissue9.4
Ponstissue9.2
Cerebral cortextissue8.7low
Motor cortextissue8.7
Ventral forebraintissue8.7
Entorhinal cortextissue8.5
Midbraintissue8.4
Prefrontal cortextissue8.3
Retrosplenial cortextissue8.3
Thalamustissue7.9
Retrosplenial and cingulate cortextissue7.9
Putamentissue7.8
Insular cortextissue7.8
Parathyroid glandtissue7.7not detected
Thyroid glandtissue7.7low
Temporal cortextissue7.7
Fallopian tubetissue7.2high
Occipital cortextissue7.2
Substantia nigratissue6.8
Somatosensory cortextissue6.7
Superior colliculitissue6.6
Epididymistissue5.0medium
Breasttissue4.2not detected
Endometrium 1tissue4.1medium
Gallbladdertissue3.7medium
Testistissue3.4medium
Lungtissue3.3not detected
Nucleus accumbenstissue2.2
Seminal vesicletissue2.1medium
Livertissue2.1medium
Locus coeruleustissue2.1
Stomach 1tissue1.7not detected
Postcentral gyrustissue1.6
Caudate putamentissue1.6
Cervixtissue1.5medium
Frontal cortextissue1.5
Retinatissue1.3
Hippocampustissue1.3not detected
Adrenal glandtissue1.2low
Pituitary glandtissue1.1
Cerebellumtissue1.1not detected
Prostatetissue1.1low
Rectumtissue0.7not detected
Colontissue0.7not detected
Ovarytissue0.6not detected
Placentatissue0.6not detected
Duodenumtissue0.6not detected
Salivary glandtissue0.2not detected

Brain sub-regions (HPA Brain Atlas): detected in 190; highest nTPM — Ventral spinal cord (15.3), Ventral hippocampus (15.2), Dorsal hippocampus (14.4), Subiculum (13.3), White matter (12.2).

Regulation

Is transcription factor: no

Upstream regulators (CollecTRI, top): EHF, FLCN

miRNA regulators (miRDB)

Targeting DCDC2 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific).

showing 30 of 205 miRNAs:

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-4795-3P100.0074.624024
HSA-MIR-4668-3P100.0068.742635
HSA-MIR-126-5P100.0072.713180
HSA-MIR-3613-3P100.0076.367965
HSA-MIR-196A-5P100.0068.16684
HSA-MIR-196B-5P100.0068.16681
HSA-MIR-1277-5P100.0073.955056
HSA-MIR-12118100.0065.881270
HSA-MIR-7110-3P100.0073.182486
HSA-MIR-3667-3P99.9967.171636
HSA-MIR-607799.9968.042299
HSA-MIR-366299.9973.825684
HSA-MIR-428299.9975.366408
HSA-MIR-371B-5P99.9975.344759
HSA-MIR-548N99.9871.944170
HSA-MIR-569699.9872.364487
HSA-MIR-4482-3P99.9872.503147
HSA-MIR-480399.9871.993117
HSA-MIR-373-5P99.9875.364753
HSA-MIR-616-5P99.9875.584775
HSA-MIR-6891-5P99.9866.531372
HSA-MIR-520D-5P99.9873.344883
HSA-MIR-524-5P99.9873.434882
HSA-MIR-3173-3P99.9866.491217
HSA-MIR-314899.9775.066478
HSA-MIR-302C-5P99.9772.563642
HSA-MIR-548AN99.9770.912817
HSA-MIR-365899.9673.874379
HSA-MIR-548AJ-3P99.9673.385345
HSA-MIR-548X-3P99.9673.385345

Functional genomics

gnomAD constraint: pLI 1.18e-09, LOEUF 1.06, missense Z 0.584 — population loss-of-function intolerance (pLI ≥ 0.9 = LoF-intolerant; lower LOEUF = more constrained). gnomAD

Regional missense constraint (gnomAD RMC): no regional variation along ENST00000378454 — one region, missense o/e 0.98.

Literature-anchored findings (GeneRIF, showing 40)

  • DCDC2 is proposed as a candidate gene for reading disability. (PMID:16278297)
  • Strong genetic evidence of DCDC2 as a susceptibility gene for dyslexia. (PMID:16385449)
  • A slight tendency for an intronic deletion in DCDC2 to be associated with worse performance on some quantitative measures of dyslexia in the probands, was observed. (PMID:17450541)
  • we found a nominally significant association for the quantitative dimension “word reading” and dcdc2 genotype (PMID:18810304)
  • conclude that the causative variant/s in DCDC2 conferring susceptibility to dyslexia in our sample remain/s to be identified (PMID:19018237)
  • suspected dyslexia-associated gene (PMID:19238550)
  • Our data suggest that the causal variants for ADHD might be found in the VMP/DCDC2 region (PMID:19362708)
  • DCDC2 is a risk gene for reading disorder. (PMID:20068590)
  • Five alleles displayed strong enhancer activity and increased gene expression, while allele 1 showed no enhancer activity. These studies suggest that the association of BV677278 with RD reflects a role as a modifier of DCDC2 expression. (PMID:21042874)
  • No statistically significant associations were found between DCDC2 or DYX1C1 and language phenotypes. Both DCDC2 and DYX1C1 DD susceptibility genes appear to have a pleiotropic role on mathematics but not language phenotypes. (PMID:21046216)
  • We identified four rare variants that were significantly associated with the late MMN component. (PMID:21104116)
  • At this point, there is no statistical evidence of association between the allelic variation in the three candidate genes and DD in our sample. (PMID:21203818)
  • We provide further support for the role of KIAA0319 and DCDC2 in contributing to reading abilities (PMID:21457949)
  • This study demonistrated that The superior prefrontal, temporal and occipital networks were positively related to DCDC2 in the schizophrenia, but not the control group. (PMID:21507613)
  • DCDC2 overexpression in C. elegans causes an abnormal neuronal phenotype that can only be seen in ciliated neurons. Together our results suggest a potential role for DCDC2 in the structure and function of primary cilia (PMID:21698230)
  • DCDC2 influences both reading and memory impairments. (PMID:21881542)
  • The DCDC2 gene may not be a susceptibility factor for developmental dyslexia among the Han Chinese. (PMID:22490485)
  • Mutations in cilia co-expressed DCDC2, DYX1C1 and KIAA0319 genes are associated with a cognitive neurological disorder, dyslexia. (PMID:22558177)
  • The results of this study found that DCDC2 gene contained polymorphisms that were significantly associated with white matter volume in the left temporo-parietal region and that white matter volume influenced reading ability. (PMID:22683091)
  • In prostate cancer cells, DCDC2 colocalized with microtubules and promoted cell migration and resistance to the microtubule-targeting drug taxol.DCDC2 is aberrantly expressed in prostate cancers. (PMID:22733135)
  • DCDC2 rs807701 might contribute significantly to dyslexia risk. (PMID:23229871)
  • This study demonstrated the association of developmental dyslexia with rs4504469 of KIAA0319 and not with any single-nucleotide polymorphisms of DCDC2. (PMID:23677054)
  • BV677278 is a regulatory element that influences reading and language skills. (PMID:23746548)
  • DCDC2d is associated with altered fractional anisotropy (PMID:24926531)
  • Among children exposed to low socioeconomic level, READ1 [regulatory element associated with dyslexia 1 ] genetic variant targets the worst outcome in children’s attention. (PMID:25012462)
  • the association of DCDC2 and KIAA0319 with Developmental dyslexia in Chinese population should be further validated (PMID:25230923)
  • This study demonstrated that DCDC2 intron 2 deletion impair illusory visual motion perception-specifically processed by the magnocellular-dorsal (M-D) stream-is impaired in children with Developmental dyslexia. (PMID:25270309)
  • An SNP in DCDC2 (rs793842) was significantly associated with the thickness of the left temporoparietal cortex. (PMID:25339756)
  • DCDC2 interacts with the mediator of Wnt signaling dishevelled, and that DCDC2 overexpression inhibits beta-catenin-dependent Wnt signaling; central role of Wnt signaling in the pathogenesis of nephronophthisis-related ciliopathies (PMID:25557784)
  • Our results reveal DCDC2a to be a deafness gene and a player in hair cell kinocilia and supporting cell primary cilia length regulation likely via its role in microtubule formation and stabilization. (PMID:25601850)
  • A nonsynonymous polymorphism in DCDC2 (corrected P = 0.002) and a noncoding variant in S100B (corrected P = 0.016) showed a significant association with spelling performance in families of German origin. (PMID:25877001)
  • In a population carrying a deletion in the DCDC2 gene, impaired motion perception was identified in subjects with dyslexia. (PMID:26019324)
  • off-target, non-immune mediated effects of the mTOR-inhibitor everolimus on the podocyte cytoskeleton might involve regulation of microtubules, revealing a potential novel role of TUBB2B and DCDC2 in glomerular podocyte development (PMID:26331477)
  • DCDC2 Polymorphism is associated with reading disability. (PMID:27100778)
  • The study corroborates the importance of rs7765678-DCDC2 among others in the aetiology of dyslexia in a German case-control cohort. (PMID:27312598)
  • Study identified biallelic missense mutations or in-frame deletion in DCDC2 in children affected with neonatal sclerosi. Mutations involve highly conserved amino acids in the doublecortin domains of the protein. In cholangiocytes, DCDC2 protein is normally located in the cytoplasm and cilia, whereas in patients the mutated protein is accumulated in the cytoplasm, absent from cilia, and associated with ciliogenesis defect. (PMID:27319779)
  • that endogenous DYX1C1 localizes to the base of the cilium, whereas DCDC2 localizes along the entire axoneme of the cilium (PMID:27451412)
  • Neonatal sclerosing cholangitis patients in substantial proportion harbour mutations in DCDC2. (PMID:27469900)
  • Developmental dyslexia genetic (DCDC2) and environmental factors (smoke and miscarriage) underlie ADHD traits supporting a potential pleiotropic effect. (PMID:27501527)
  • Study concludes that DCDC2 deletion is not a strong risk factor for dyslexia. (PMID:28742079)

Cross-species orthologs

2 orthologs

OrganismSymbolGene ID
mus_musculusDcdc2aENSMUSG00000035910
rattus_norvegicusDcdc2ENSRNOG00000017511

Paralogs (2): DCDC2C (ENSG00000214866), DCDC2B (ENSG00000222046)

Mouse-model phenotypes

Observed phenotypes of the mouse ortholog (MGI:2652818) from MGI (Alliance of Genome Resources) — knockout/mutant phenotypes, ranked by annotation count. 4 distinct phenotype terms.

Mouse phenotype (MP)Records
increased anxiety-related response1
abnormal spatial learning1
abnormal spatial working memory1
impaired short-term object recognition memory1

Additional cross-species homologs

Sequence homologs in species beyond Ensembl Compara’s model organisms, by Diamond local protein alignment (% sequence identity; best hit per species). Lower-identity rows are more distant homologs. The matched accessions’ gene symbols aren’t in biobtree yet, so each row shows the UniProt accession.

OrganismUniProtIdentityMethod
Papio hamadryasQ8MJ0692.1%Diamond
Saimiri boliviensis boliviensisQ8MJ0388.9%Diamond
Bos taurusQ8MJ0566.8%Diamond
Drosophila melanogasterQ9VUI338.1%Diamond
Caenorhabditis elegansQ69Z0837.5%Diamond

Genomic neighbors (locus context)

Genes flanking this one on the chromosome (NCBI/Entrez gene neighborhood). Positional context only — some neighbors share regulatory elements (bidirectional promoters, antisense/overlapping transcripts), but chromosomal adjacency is not itself a functional relationship (see Interactions for that).

SymbolTypeEntrez
GPLD1protein-coding2822
KAAG1ncRNA353219
MRS2protein-coding57380
ALDH5A1protein-coding7915
NRSN1protein-coding140767
TDP2protein-coding51567
KIAA0319protein-coding9856

Protein

Protein identifiers

Doublecortin domain-containing protein 2 — Q9UHG0 (reviewed: Q9UHG0)

Alternative names: Protein RU2S

All UniProt accessions (2): Q9UHG0, H0Y784

UniProt curated annotations — full annotation on UniProt →

Function. Protein that plays a role in the inhibition of canonical Wnt signaling pathway. May be involved in neuronal migration during development of the cerebral neocortex. Involved in the control of ciliogenesis and ciliary length.

Subunit / interactions. Interacts with DVL1, DVL2 and DVL3.

Subcellular location. Cell projection. Cilium. Cytoplasm. Cytoskeleton. Cilium axoneme. Kinocilium.

Tissue specificity. Ubiquitously expressed. In brain, highly expressed in the entorhinal cortex, inferior temporal cortex, medial temporal cortex, hypothalamus, amygdala and hippocampus. Expressed in liver by cholangiocytes, the epithelial cells of the bile ducts (at protein level).

Disease relevance. Dyslexia 2 (DYX2) [MIM:600202] A relatively common, complex cognitive disorder characterized by an impairment of reading performance despite adequate motivational, educational and intellectual opportunities. It is a multifactorial trait, with evidence for familial clustering and heritability. Disease susceptibility is associated with variants affecting the gene represented in this entry. Nephronophthisis 19 (NPHP19) [MIM:616217] A form of nephronophthisis, an autosomal recessive disorder characterized by chronic tubulointerstitial nephritis resulting in end-stage renal disease. NPHP19 patients also manifest hepatosplenomegaly, hepatic fibrosis, destruction of the bile ducts, focal bile ductal proliferation, ductal plate malformation, and cholestasis. The disease is caused by variants affecting the gene represented in this entry. Deafness, autosomal recessive, 66 (DFNB66) [MIM:610212] A form of non-syndromic sensorineural hearing loss. Sensorineural deafness results from damage to the neural receptors of the inner ear, the nerve pathways to the brain, or the area of the brain that receives sound information. The disease is caused by variants affecting the gene represented in this entry. Sclerosing cholangitis, neonatal (NSC) [MIM:617394] An autosomal recessive form of liver disease with onset in infancy. Affected infants have jaundice, cholestasis, acholic stools, and progressive liver dysfunction resulting in fibrosis and cirrhosis. Cholangiography shows patent biliary ducts, but there are bile duct irregularities. The disease is caused by variants affecting the gene represented in this entry.

Isoforms (2)

UniProt IDNamesCanonical?
Q9UHG0-11yes
Q9UHG0-22

RefSeq proteins (2): NP_001182539, NP_057440* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR003533Doublecortin_domDomain
IPR033036DCDC2_DCX_dom2Domain
IPR036572Doublecortin_dom_sfHomologous_superfamily

Pfam: PF03607

UniProt features (32 total): sequence variant 7, strand 6, compositionally biased region 6, sequence conflict 3, helix 3, domain 2, splice variant 2, chain 1, modified residue 1, region of interest 1

Structure

Experimental structures (PDB)

1 structures by resolution:

PDBTitleMethodResolution (Å)
2DNFSolution structure of RSGI RUH-062, a DCX domain from humanSOLUTION NMR

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q9UHG0-F163.930.17

Human Protein Atlas

Protein class: Predicted intracellular proteins, Plasma proteins, Disease related genes, Human disease related genes, Congenital malformations, Congenital malformations of the urinary system, Ear disease

Protein evidence: Evidence at protein level

Subcellular location (HPA, imaging): cytosol; microtubules; acrosome; centriolar satellite; equatorial segment; mitotic spindle; principal piece

Antibody reliability (HPA): IH enhanced · IF approved

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Post-translational modifications (1)

TypePositions
Phosphoserine270

Function

Pathways and Gene Ontology

Reactome pathways

0 curated (TAS) of 0; 0 disease pathways. Curated-first; evidence = TAS (manually curated) vs IEA (electronic inference).

MSigDB gene sets: 297 (showing top): GOBP_DENDRITE_DEVELOPMENT, AAGCAAT_MIR137, GOBP_SENSORY_PERCEPTION_OF_MECHANICAL_STIMULUS, GOZGIT_ESR1_TARGETS_DN, GOBP_NEUROGENESIS, GOBP_REGULATION_OF_WNT_SIGNALING_PATHWAY, RIZKI_TUMOR_INVASIVENESS_3D_DN, GOBP_REGULATION_OF_CELLULAR_COMPONENT_BIOGENESIS, GOCC_MICROTUBULE_ORGANIZING_CENTER, GOBP_REGULATION_OF_CELL_PROJECTION_ORGANIZATION, GOBP_DENDRITE_MORPHOGENESIS, GOBP_CILIUM_ORGANIZATION, SCHAEFFER_PROSTATE_DEVELOPMENT_48HR_UP, GOBP_ORGANELLE_ASSEMBLY, GOBP_NEURON_MIGRATION

GO Biological Process (11): neuron migration (GO:0001764), cellular defense response (GO:0006968), sensory perception of sound (GO:0007605), regulation of Wnt signaling pathway (GO:0030111), intracellular signal transduction (GO:0035556), positive regulation of smoothened signaling pathway (GO:0045880), dendrite morphogenesis (GO:0048813), cilium assembly (GO:0060271), regulation of cilium assembly (GO:1902017), nervous system development (GO:0007399), cell projection organization (GO:0030030)

GO Molecular Function (2): kinesin binding (GO:0019894), protein binding (GO:0005515)

GO Cellular Component (8): cytoplasm (GO:0005737), microtubule organizing center (GO:0005815), microtubule (GO:0005874), cilium (GO:0005929), axoneme (GO:0005930), kinocilium (GO:0060091), mitotic spindle (GO:0072686), cytoskeleton (GO:0005856)

GO top-level categories

46 GO namespaces:

CategoryTerms
cellular anatomical structure3
intracellular anatomical structure2
microtubule cytoskeleton2
cell migration1
generation of neurons1
defense response1
sensory perception of mechanical stimulus1
regulation of signal transduction1
Wnt signaling pathway1
signal transduction1
smoothened signaling pathway1
regulation of smoothened signaling pathway1
positive regulation of signal transduction1
dendrite development1
cell morphogenesis involved in neuron differentiation1
neuron projection morphogenesis1
axoneme assembly1
intraciliary transport involved in cilium assembly1
cilium organization1
protein localization to cilium1
organelle assembly1
trans-Golgi to periciliary membrane compartment transport1
plasma membrane bounded cell projection assembly1
ciliary transition zone assembly1
cilium assembly1
regulation of plasma membrane bounded cell projection assembly1
regulation of organelle assembly1
system development1
animal gross anatomical part developmental process1
cellular component organization1
cytoskeletal protein binding1
binding1
polymeric cytoskeletal fiber1
intraciliary transport particle1
membrane-bounded organelle1
plasma membrane bounded cell projection1
cytoskeleton1
microtubule1
ciliary plasm1
radial spoke1
stereocilium bundle1
neuron projection1
organelle1
9+2 non-motile cilium1
spindle1
intracellular membraneless organelle1

Experimentally-supported GO annotations

GO terms backed by direct experimental evidence (ECO experimental codes) — 9 of 21 annotations. The rest are phylogenetic / computational / electronic (IEA).

9 experimentally-supported GO terms:

GO termNSEvidence
cilium assemblyBPmutant phenotype
positive regulation of smoothened signaling pathwayBPmutant phenotype
regulation of Wnt signaling pathwayBPmutant phenotype
regulation of cilium assemblyBPmutant phenotype
sensory perception of soundBPmutant phenotype
axonemeCCdirect assay
ciliumCCdirect assay
cytoplasmCCdirect assay
mitotic spindleCCdirect assay

Protein interactions and networks

STRING

showing 15 of 704 interactions by confidence (×1000):

Protein AProtein BPartner UniProtScore
DCDC2KIAA0319Q5VV43982
DCDC2DNAAF4Q8WXU2970
DCDC2KAAG1Q9UBP8909
DCDC2ACOT13Q9NPJ3884
DCDC2TDP2O95551851
DCDC2GCFC2P16383719
DCDC2ROBO1Q9Y6N7719
DCDC2MRPL19P49406677
DCDC2ATP2C2O75185632
DCDC2CMIPQ8IY22629
DCDC2KIAA0319LQ8IZA0592
DCDC2FOXP2O15409553
DCDC2MAGEA1P43355551
DCDC2CNTNAP2Q9UHC6549
DCDC2NRSN1Q8IZ57539

IntAct

Human interaction partners of DCDC2 in IntAct, one row per partner (best MIscore; records = supporting IntAct interaction records).

27 partners by confidence:

PartnerInteraction typeMIscoreRecords
B3GNT5physical association0.5603
C5AR2physical association0.5603
CENPOphysical association0.5603
CKS1Bphysical association0.5603
COMMD9physical association0.5603
CYTH4physical association0.5603
DYNC2LI1physical association0.5603
DYNLT2physical association0.5603
FAM118Aphysical association0.5603
GNL3Lphysical association0.5603
HORMAD1physical association0.5603
KRTAP5-9physical association0.5603
KRTAP9-3physical association0.5603
LMO3physical association0.5603
MGME1physical association0.5603
MICALL2physical association0.5603
MRFAP1physical association0.5603
MYG1physical association0.5603
NIF3L1physical association0.5603
NMUphysical association0.5603
OXTphysical association0.5603
POP5physical association0.5603
PTPRCAPphysical association0.5603
SLC38A2physical association0.5603
TOLLIPphysical association0.5603
TRMT11physical association0.5603
ZNF432physical association0.5603

BioGRID (41 interactions; top human partners by supporting records): DCTN1 (Proximity Label-MS; 2 records), APP (Reconstituted Complex), B3GNT5 (Two-hybrid), CENPO (Two-hybrid), CKS1B (Two-hybrid), COMMD9 (Two-hybrid), DCAF15 (Proximity Label-MS), DCAF7 (Proximity Label-MS), DYNC2LI1 (Two-hybrid), EZH2 (Affinity Capture-MS), FAM118A (Two-hybrid), FBXW5 (Proximity Label-MS), FTL (Affinity Capture-MS), GCH1 (Affinity Capture-MS), KRTAP5-9 (Two-hybrid)

SIGNOR signaling

1 signaling interactions:

AEffectBMechanism
EHF“down-regulates quantity by repression”DCDC2“transcriptional regulation”

Protein complexes (CORUM) (1)

Experimentally-characterized complexes this protein is a subunit of (★ = the complex contains a known drug target).

1 complexes by size:

ComplexSubunitsMembers
DCDC2-MAPK8IP1 complex2DCDC2, MAPK8IP1

Disease & clinical

Genetic variants

Variant evidence for DCDC2: 410 ClinVar records (30 pathogenic / likely pathogenic); 7 GWAS associations. Per-variant detail is on Sugi Variant.

ClinVar

410 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic14
Likely pathogenic16
Uncertain significance183
Likely benign105
Benign42

Top pathogenic / likely-pathogenic (15)

Showing the 15 best-reviewed of 30 pathogenic / likely-pathogenic ClinVar records, ranked by ClinVar review status (expert panel → multiple submitters → single submitter), then by number of submitting labs.

Variant IDHGVSClassificationReviewSubmitters
180688NM_016356.5(DCDC2):c.123_124del (p.Ser42fs)Pathogeniccriteria provided, multiple submitters, no conflicts9
417769NM_016356.5(DCDC2):c.529dup (p.Ile177fs)Pathogeniccriteria provided, multiple submitters, no conflicts7
180689NM_016356.5(DCDC2):c.349-2A>GPathogeniccriteria provided, multiple submitters, no conflicts5
417768NM_016356.5(DCDC2):c.890T>A (p.Leu297Ter)Pathogeniccriteria provided, multiple submitters, no conflicts4
502281NM_016356.5(DCDC2):c.294-2A>GPathogeniccriteria provided, multiple submitters, no conflicts3
2634418NM_016356.5(DCDC2):c.705-2A>GPathogeniccriteria provided, multiple submitters, no conflicts3
593986NM_016356.5(DCDC2):c.293dup (p.Asn98fs)Pathogeniccriteria provided, single submitter1
1162261NM_016356.5(DCDC2):c.346G>T (p.Glu116Ter)Pathogeniccriteria provided, single submitter1
1687288NM_016356.5(DCDC2):c.536_537del (p.Leu179fs)Pathogeniccriteria provided, single submitter1
1687593NM_016356.5(DCDC2):c.557+1G>TPathogeniccriteria provided, single submitter1
802191NM_016356.5(DCDC2):c.829A>T (p.Lys277Ter)Likely pathogeniccriteria provided, single submitter1
804454NM_016356.5(DCDC2):c.549dup (p.Val184fs)Likely pathogeniccriteria provided, single submitter1
973531NM_016356.5(DCDC2):c.923-283_1023+141delLikely pathogeniccriteria provided, single submitter1
1492885NM_016356.5(DCDC2):c.426-2A>GLikely pathogeniccriteria provided, single submitter1
2629455NM_016356.5(DCDC2):c.1155del (p.Glu386fs)Likely pathogeniccriteria provided, single submitter1

Per-variant reference — Sugi Variant

Explore DCDC2’s pathogenic and likely-pathogenic variants individually — each with its ClinVar classification and conditions, applied ACMG criteria (ClinGen expert panel, where curated), the calibrated in-silico predictors (AlphaMissense, REVEL, SaProt, conservation), gnomAD frequency, and the predictor-disagreement QC signal — on Sugi Variant.

SpliceAI

Top 10 splice-impact sites by Δscore (adjacent positions with the same effect merged into one range; 41 predictions of 1,288):

Position(s)EffectΔscoreSites
6:24174835–24174836acceptor_loss1.00006
6:24177608donor_gain1.0000
6:24178334donor_gain1.0000
6:24178633–24178634acceptor_loss1.00006
6:24178643acceptor_gain1.0000
6:24205000–24205001donor_loss1.00005
6:24205103–24205104acceptor_loss1.00006
6:24278047–24278048donor_loss1.00005
6:24290930–24290931donor_loss1.00004
6:24291079–24291080acceptor_loss1.00006

AlphaMissense

705 missense substitutions predicted likely pathogenic (of 3,141 scored), across 189 residues. Top 20 hotspot residues, ranked by the number of likely-pathogenic substitutions (of those reachable by a single-nucleotide change), then by mean score:

ResidueLikely-pathogenic substitutionsMean am_pathogenicityMax am_pathogenicity
F9480.9670.999
F4780.9440.999
F5980.9180.997
D34080.8880.948
H7280.7900.981
N14670.9640.994
F4470.9630.984
E9270.9560.980
R6370.9550.997
W16670.9440.992
F21570.9330.988
F13170.8740.980
F14270.8730.980
F31270.8600.948
D14870.8560.939
H3770.8050.933
V8760.9940.998
G7160.9840.999
G6060.9680.995
Y9960.9670.999

HPA cancer prognostics

RNA cancer specificity: Cancer enhanced (Kidney Renal Papillary Cell Carcinoma)

Disease associations

OMIM: gene MIM:605755 | disease phenotypes: MIM:246700, MIM:610212, MIM:617394, MIM:616217, MIM:600202

GenCC curated gene-disease

7 curated gene-disease records:

DiseaseClassificationInheritanceRecords
ciliopathyDefinitiveAutosomal recessive3
nephronophthisis 19StrongAutosomal recessive3
isolated neonatal sclerosing cholangitisStrongAutosomal recessive2
Senior-Boichis syndromeSupportiveAutosomal recessive
hearing loss, autosomal recessiveSupportiveAutosomal recessive
autosomal recessive nonsyndromic hearing loss 66LimitedAutosomal recessive3
nonsyndromic genetic hearing lossLimitedAutosomal recessive

ClinGen Gene-Disease Validity

Expert-panel classifications — Definitive > Strong > Moderate > Limited > Disputed > Refuted.

2 validity classifications:

DiseaseClassificationInheritance
ciliopathyDefinitiveAR
nonsyndromic genetic hearing lossLimitedAR

Genomics England panels (PanelApp)

Clinical diagnostic gene panels including this gene (10 panels, 3 green/diagnostic-grade). Confidence: green = diagnostic, amber = moderate.

10 panels:

PanelRating
Cholestasisgreen
DDG2Pgreen
Neonatal cholestasisgreen
Cystic renal diseaseamber
Fetal anomaliesamber
Paediatric disordersamber
Rare multisystem ciliopathy Super panelamber
Renal ciliopathiesamber
Tubulointerstitial kidney diseaseamber
Unexplained young onset end-stage renal diseaseamber

Mondo (9): chylomicron retention disease (MONDO:0009528), autosomal recessive nonsyndromic hearing loss 66 (MONDO:0012442), isolated neonatal sclerosing cholangitis (MONDO:0018816), nephronophthisis 19 (MONDO:0014537), dyslexia, susceptibility to, 2 (MONDO:0010843), ciliopathy (MONDO:0005308), nonsyndromic genetic hearing loss (MONDO:0019497), Senior-Boichis syndrome (MONDO:0019394), hearing loss, autosomal recessive (MONDO:0019588)

Orphanet (4): Chylomicron retention disease (Orphanet:71), Isolated neonatal sclerosing cholangitis (Orphanet:480556), Rare autosomal recessive non-syndromic sensorineural deafness type DFNB (Orphanet:90636), Senior-Boichis syndrome (Orphanet:84081)

HPO phenotypes

58 phenotypes (HPO-id order):

HPOTerm
HP:0000007Autosomal recessive inheritance
HP:0000076Vesicoureteral reflux
HP:0000089Renal hypoplasia
HP:0000090Nephronophthisis
HP:0000108Renal corticomedullary cysts
HP:0000365Hearing impairment
HP:0000407Sensorineural hearing impairment
HP:0000713Agitation
HP:0000718Aggressive behavior
HP:0000822Hypertension
HP:0000952Jaundice
HP:0000989Pruritus
HP:0001256Mild intellectual disability
HP:0001394Cirrhosis
HP:0001395Hepatic fibrosis
HP:0001396Cholestasis
HP:0001399Hepatic failure
HP:0001408Bile duct proliferation
HP:0001409Portal hypertension
HP:0001433Hepatosplenomegaly
HP:0001541Ascites
HP:0001744Splenomegaly
HP:0001903Anemia
HP:0001959Polydipsia
HP:0002040Esophageal varix
HP:0002240Hepatomegaly
HP:0002500Abnormal cerebral white matter morphology
HP:0002506Diffuse cerebral atrophy
HP:0002612Congenital hepatic fibrosis
HP:0002613Biliary cirrhosis
HP:0002910Elevated circulating hepatic transaminase concentration
HP:0003155Elevated circulating alkaline phosphatase concentration
HP:0003573Increased total bilirubin
HP:0003577Congenital onset
HP:0003593Infantile onset
HP:0003623Neonatal onset
HP:0003676Progressive
HP:0003774Stage 5 chronic kidney disease
HP:0004719Hyperechogenic kidneys
HP:0005565Reduced renal corticomedullary differentiation
HP:0006563Malformation of the hepatic ductal plate
HP:0006571Reduced number of intrahepatic bile ducts
HP:0006580Portal fibrosis
HP:0007018Attention deficit hyperactivity disorder
HP:0011985Acholic stools
HP:0012163Carotid artery dilatation
HP:0012585Renal atrophy
HP:0012591Abnormal urinary electrolyte concentration
HP:0012622Chronic kidney disease
HP:0012852Hepatic bridging fibrosis
HP:0020132Thickening of the tubular basement membrane
HP:0030948Elevated gamma-glutamyltransferase level
HP:0030991Sclerosing cholangitis
HP:0031589Suicidal ideation
HP:0032581Abnormal renal interstitial morphology
HP:0032622Tubular luminal dilatation
HP:0032948Renal interstitial fibrosis
HP:0034294Ductal bile plugs

GWAS associations

7 associations:

StudyTraitp-value
GCST006269_211General cognitive ability3e-10
GCST008058_233Estimated glomerular filtration rate1e-8
GCST007876_126Estimated glomerular filtration rate4e-8
GCST001621_5Airflow obstruction8e-7
GCST008060_17Estimated glomerular filtration rate2e-6
GCST000905_4Information processing speed3e-6
GCST000963_8Uric acid levels5e-6

EFO canonical traits (from GWAS)

4 canonical traits:

EFO IDTrait name
EFO:0004363information processing speed
EFO:0004761uric acid measurement
EFO:0003892pulmonary function measurement
EFO:0004337intelligence

MeSH disease descriptors

4 disease descriptors:

DescriptorNameTree numbers
C535460Chylomicron retention disease *(supp.)*
C564609Deafness, Autosomal Recessive *(supp.)*
C565701Deafness, Autosomal Recessive 66 *(supp.)*
C580334Nonsyndromic Deafness *(supp.)*

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (CPIC guideline: no)

CTD chemical–gene interactions

37 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
Benzo(a)pyreneaffects methylation, decreases expression, increases expression, increases methylation5
bisphenol Aaffects expression, affects methylation2
Cyclosporinedecreases expression2
aristolochic acid Idecreases expression1
dicrotophosdecreases expression1
butyraldehydedecreases expression1
benzo(e)pyreneincreases methylation1
3,4,3’,4’-tetrachlorobiphenylaffects expression1
S-(1,2-dichlorovinyl)cysteineaffects response to substance, increases expression1
celastrolincreases expression1
perfluorooctane sulfonic aciddecreases expression1
2,3,5-(triglutathion-S-yl)hydroquinoneincreases ADP-ribosylation1
belinostatdecreases expression1
bisphenol Sdecreases methylation1
jinfukangaffects cotreatment, decreases expression1
(+)-JQ1 compounddecreases expression1
Zoledronic Aciddecreases expression1
Leflunomideaffects expression1
Acetaminophendecreases expression1
Air Pollutantsdecreases expression1
Azathioprinedecreases expression1
Caffeinedecreases phosphorylation1
Carbamazepineaffects expression1
Cisplatinaffects cotreatment, decreases expression1
Estradiolaffects cotreatment, decreases expression1
Leaddecreases expression1
Lipopolysaccharidesaffects response to substance, increases expression1
Methapyrileneincreases methylation1
Quercetindecreases expression1
Tetrachlorodibenzodioxinincreases expression1

Cellosaurus cell lines

1 cell lines: 1 cancer cell line

First 10 cell lines (id-ordered, not curated):

CellosaurusNameCategorySex
CVCL_D7NGUbigene A-549 DCDC2 KOCancer cell lineMale

Clinical trials (associated diseases)

Via MONDO — disease-level, not drug-specific.

4 trials:

NCTPhaseStatusTitle
NCT00068224Not specifiedCOMPLETEDClinical and Molecular Investigations Into Ciliopathies
NCT04874909Not specifiedCOMPLETEDClassification, Functional Stratification and Biomarkers in Ciliopathy (CILLICORIRCM)
NCT01802190Not specifiedTERMINATEDPrevalence of POU4F3 and SLC17A8 Mutations
NCT05208879Not specifiedCOMPLETEDCArotenoid in hypoChOlesterolemia