CTDNEP1

gene
On this page

Also known as HSA011916NET56

Summary

CTDNEP1 (CTD nuclear envelope phosphatase 1, HGNC:19085) is a protein-coding gene on chromosome 17p13.1, encoding CTD nuclear envelope phosphatase 1 (O95476). Serine/threonine protein phosphatase forming with CNEP1R1 an active phosphatase complex that dephosphorylates and may activate LPIN1 and LPIN2. It is a selective cancer dependency (DepMap: 40.1% of cell lines).

Enables protein serine/threonine phosphatase activity. Involved in several processes, including positive regulation of triglyceride biosynthetic process; protein dephosphorylation; and protein localization to nucleus. Located in endoplasmic reticulum membrane; lipid droplet; and nuclear membrane. Part of Nem1-Spo7 phosphatase complex.

Source: NCBI Gene 23399 — RefSeq curated summary.

At a glance

  • Clinical variants (ClinVar): 36 total — 1 pathogenic
  • Cancer dependency (DepMap): dependent in 40.1% of screened cell lines
  • MANE Select transcript: NM_001143775

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:19085
Approved symbolCTDNEP1
NameCTD nuclear envelope phosphatase 1
Location17p13.1
Locus typegene with protein product
StatusApproved
AliasesHSA011916, NET56
Ensembl geneENSG00000175826
Ensembl biotypeprotein_coding
OMIM610684
Entrez23399

Gene structure

Transcript identifiers

Ensembl transcripts: 15 — 11 protein_coding, 2 nonsense_mediated_decay, 2 retained_intron

ENST00000318988, ENST00000570380, ENST00000570385, ENST00000570484, ENST00000570828, ENST00000571409, ENST00000572043, ENST00000573600, ENST00000574205, ENST00000574322, ENST00000575783, ENST00000576613, ENST00000912384, ENST00000964617, ENST00000964618

RefSeq mRNA: 2 — MANE Select: NM_001143775 NM_001143775, NM_015343

CCDS: CCDS11093

Canonical transcript exons

ENST00000574322 — 8 exons

ExonStartEnd
ENSE0000127880672460267246137
ENSE0000189805972435917244245
ENSE0000265397872511957251734
ENSE0000356652872470647247182
ENSE0000358983372462547246370
ENSE0000360417572472777247343
ENSE0000361043572467917246862
ENSE0000364692972445517244635

Expression profiles

Bgee: expression breadth ubiquitous, 134 present calls, max score 99.15.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 124.1744 / max 731.4599, expressed in 1827 samples.

FANTOM5 promoters (12 alternative TSS)

Promoter IDTPM avgSamples expressed
16417797.04331825
16417621.18481807
1641781.68081081
1641720.8909622
1641740.6083338
1641730.5727281
1641750.5678312
1641710.4426192
2080470.4180199
2080460.3588157

Top tissues by expression

134 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
hindlimb stylopod muscleUBERON:000425299.15gold quality
gastrocnemiusUBERON:000138899.00gold quality
skeletal muscle tissueUBERON:000113498.87gold quality
muscle tissueUBERON:000238598.68gold quality
muscle of legUBERON:000138398.60gold quality
cortical plateUBERON:000534398.54gold quality
ganglionic eminenceUBERON:000402398.49gold quality
granulocyteCL:000009498.30gold quality
ventricular zoneUBERON:000305398.21gold quality
skin of legUBERON:000151198.13gold quality
stromal cell of endometriumCL:000225598.07gold quality
zone of skinUBERON:000001498.06gold quality
right ovaryUBERON:000211898.06gold quality
skin of abdomenUBERON:000141698.02gold quality
endocervixUBERON:000045898.01gold quality
body of uterusUBERON:000985397.97gold quality
left ovaryUBERON:000211997.93gold quality
ovaryUBERON:000099297.89gold quality
spleenUBERON:000210697.89gold quality
smooth muscle tissueUBERON:000113597.88gold quality
lower esophagus mucosaUBERON:003583497.87gold quality
ectocervixUBERON:001224997.86gold quality
lymph nodeUBERON:000002997.83gold quality
fallopian tubeUBERON:000388997.78gold quality
body of stomachUBERON:000116197.75gold quality
left uterine tubeUBERON:000130397.75gold quality
right lobe of thyroid glandUBERON:000111997.73gold quality
islet of LangerhansUBERON:000000697.72gold quality
upper lobe of left lungUBERON:000895297.72gold quality
body of pancreasUBERON:000115097.71gold quality

Single-cell (SCXA)

Detected in 2 experiment(s), a significant marker in 1.

ExperimentMarker?Max mean expression
E-ANND-3yes10.14
E-MTAB-7249no348.96

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

50 targeting CTDNEP1, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-4510100.0066.602050
HSA-MIR-6127100.0066.762188
HSA-MIR-6129100.0066.462080
HSA-MIR-6130100.0066.692012
HSA-MIR-6133100.0066.482064
HSA-MIR-548C-3P99.9974.017587
HSA-MIR-314899.9775.066478
HSA-MIR-551B-5P99.9671.283493
HSA-LET-7C-3P99.9573.422862
HSA-MIR-651-3P99.9473.485177
HSA-MIR-6764-5P99.7567.892304
HSA-MIR-430699.7270.503630
HSA-MIR-29B-2-5P99.6768.981726
HSA-MIR-570099.6469.882280
HSA-MIR-5003-5P99.6169.131624
HSA-MIR-1915-3P99.5866.791988
HSA-MIR-432899.5771.064094
HSA-MIR-3136-3P99.5766.59781
HSA-MIR-7155-3P99.5766.48794
HSA-MIR-4762-5P99.5768.541424
HSA-MIR-5584-5P99.4968.222814
HSA-MIR-608199.4866.071446
HSA-MIR-185-5P99.3568.602497
HSA-MIR-464499.3569.122514
HSA-MIR-10522-5P99.2668.502087
HSA-MIR-6815-3P99.1368.981530
HSA-MIR-485-5P99.1064.781889
HSA-MIR-6884-5P99.1064.501987
HSA-MIR-7155-5P98.6566.141290
HSA-MIR-5011-3P98.6364.81638

Functional genomics

DepMap (CRISPR cell-line fitness): dependent in 40.1% of screened cell lines.

Literature-anchored findings (GeneRIF, showing 6)

  • Dullard participates in a unique phosphatase cascade regulating nuclear membrane biogenesis, a cascade that is conserved from yeast to mammals. (PMID:17420445)
  • dullard shows specificity for the peptide corresponding to the insulin-dependent phosphorylation site (Ser106) of lipin (PMID:21413788)
  • CTDNEP1 is upregulated in non-alcoholic fatty liver disease. Up-regulation of miR-122 can trigger the compensatory response of LPIN1 and CTDNEP1 in hepatosteatosis. (PMID:28287811)
  • Regulated lipid synthesis and LEM2/CHMP7 jointly control nuclear envelope closure. (PMID:32271860)
  • Loss of phosphatase CTDNEP1 potentiates aggressive medulloblastoma by triggering MYC amplification and genomic instability. (PMID:36765089)
  • Structure and mechanism of the human CTDNEP1-NEP1R1 membrane protein phosphatase complex necessary to maintain ER membrane morphology. (PMID:38776370)

Cross-species orthologs

6 orthologs

OrganismSymbolGene ID
danio_rerioctdnep1aENSDARG00000016519
danio_rerioctdnep1bENSDARG00000035781
mus_musculusCtdnep1ENSMUSG00000018559
rattus_norvegicusCtdnep1ENSRNOG00000017352
drosophila_melanogasterDdFBGN0029067
caenorhabditis_elegansWBGENE00018474

Paralogs (5): TIMM50 (ENSG00000105197), CTDSPL2 (ENSG00000137770), CTDSP1 (ENSG00000144579), CTDSPL (ENSG00000144677), CTDSP2 (ENSG00000175215)

Protein

Protein identifiers

CTD nuclear envelope phosphatase 1O95476 (reviewed: O95476)

Alternative names: Serine/threonine-protein phosphatase dullard

All UniProt accessions (7): O95476, I3L0X6, I3L1D9, I3L2R5, I3L3K5, I3L4B2, I3L4W0

UniProt curated annotations — full annotation on UniProt →

Function. Serine/threonine protein phosphatase forming with CNEP1R1 an active phosphatase complex that dephosphorylates and may activate LPIN1 and LPIN2. LPIN1 and LPIN2 are phosphatidate phosphatases that catalyze the conversion of phosphatidic acid to diacylglycerol and control the metabolism of fatty acids at different levels. May indirectly modulate the lipid composition of nuclear and/or endoplasmic reticulum membranes and be required for proper nuclear membrane morphology and/or dynamics. May also indirectly regulate the production of lipid droplets and triacylglycerol. May antagonize BMP signaling.

Subunit / interactions. (Microbial infection) Interacts with Chandipura virus matrix protein. Interacts with CNEP1R1; the complex dephosphorylates LPIN1 and LPIN2.

Subcellular location. Endoplasmic reticulum membrane. Nucleus membrane.

Tissue specificity. Muscle specific with lower expression in other metabolic tissues.

Similarity. Belongs to the dullard family.

RefSeq proteins (2): NP_001137247, NP_056158 (=MANE)

Domains & families (InterPro)

IDNameType
IPR004274FCP1_domDomain
IPR011948Dullard_phosphataseDomain
IPR023214HAD_sfHomologous_superfamily
IPR036412HAD-like_sfHomologous_superfamily
IPR050365TIM50Family

Pfam: PF03031

Catalyzed reactions (Rhea), 2 shown:

  • O-phospho-L-seryl-[protein] + H2O = L-seryl-[protein] + phosphate (RHEA:20629)
  • O-phospho-L-threonyl-[protein] + H2O = L-threonyl-[protein] + phosphate (RHEA:47004)

UniProt features (30 total): strand 12, helix 11, turn 2, chain 1, transmembrane region 1, domain 1, sequence variant 1, mutagenesis site 1

Structure

Experimental structures (PDB)

2 structures.

PDBMethodResolution (Å)
8UJLX-RAY DIFFRACTION1.91
8UJMX-RAY DIFFRACTION2.16

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-O95476-F190.190.69

Functional residue map

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

Mutagenesis-validated functional residues (1):

PositionPhenotype
67abolishes phosphatase activity.

Function

Pathways and Gene Ontology

Reactome pathways

1 pathways

IDPathway
R-HSA-4419969Depolymerization of the Nuclear Lamina

MSigDB gene sets: 191 (showing top): MORF_MTA1, GOBP_REGULATION_OF_TRIGLYCERIDE_METABOLIC_PROCESS, GOBP_MEMBRANE_DISASSEMBLY, MORF_UBE2I, MORF_HDAC1, MORF_CDK2, MORF_HDAC2, TAL1ALPHAE47_01, GOBP_REGULATION_OF_WNT_SIGNALING_PATHWAY, GOBP_GLYCEROLIPID_METABOLIC_PROCESS, MORF_TERF1, GOBP_REGULATION_OF_LIPID_BIOSYNTHETIC_PROCESS, GOBP_REGULATION_OF_LIPID_METABOLIC_PROCESS, MORF_RAF1, GOBP_CANONICAL_WNT_SIGNALING_PATHWAY

GO Biological Process (10): protein dephosphorylation (GO:0006470), nuclear envelope organization (GO:0006998), mitotic nuclear membrane disassembly (GO:0007077), gamete generation (GO:0007276), mesoderm development (GO:0007498), positive regulation of triglyceride biosynthetic process (GO:0010867), protein localization to nucleus (GO:0034504), canonical Wnt signaling pathway (GO:0060070), positive regulation of canonical Wnt signaling pathway (GO:0090263), protein transport (GO:0015031)

GO Molecular Function (5): phosphoprotein phosphatase activity (GO:0004721), protein serine/threonine phosphatase activity (GO:0004722), protein binding (GO:0005515), hydrolase activity (GO:0016787), phosphatase activity (GO:0016791)

GO Cellular Component (12): nuclear envelope (GO:0005635), cytoplasm (GO:0005737), endoplasmic reticulum membrane (GO:0005789), lipid droplet (GO:0005811), nuclear membrane (GO:0031965), Nem1-Spo7 phosphatase complex (GO:0071595), nucleus (GO:0005634), mitochondrion (GO:0005739), mitochondrial inner membrane (GO:0005743), TIM23 mitochondrial import inner membrane translocase complex (GO:0005744), endoplasmic reticulum (GO:0005783), membrane (GO:0016020)

Reactome top-level categories

Rollup of top-1 pathways:

CategoryPathways
Nuclear Envelope Breakdown1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
intracellular membrane-bounded organelle3
nucleus2
endomembrane system2
cellular anatomical structure2
organelle membrane2
nuclear outer membrane-endoplasmic reticulum membrane network2
cytoplasm2
dephosphorylation1
protein modification process1
nucleus organization1
endomembrane system organization1
membrane organization1
mitotic cell cycle1
nuclear membrane disassembly1
mitotic cell cycle process1
sexual reproduction1
multicellular organismal reproductive process1
tissue development1
regulation of triglyceride biosynthetic process1
triglyceride biosynthetic process1
positive regulation of lipid biosynthetic process1
positive regulation of triglyceride metabolic process1
protein localization to organelle1
Wnt signaling pathway1
positive regulation of Wnt signaling pathway1
canonical Wnt signaling pathway1
regulation of canonical Wnt signaling pathway1
transport1
intracellular protein localization1
establishment of protein localization1
phosphatase activity1
catalytic activity, acting on a protein1
phosphoprotein phosphatase activity1
binding1
catalytic activity1
phosphoric ester hydrolase activity1
organelle envelope1
intracellular anatomical structure1
endoplasmic reticulum subcompartment1
intracellular membraneless organelle1

Protein interactions and networks

STRING

899 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
CTDNEP1CNEP1R1Q8N9A8930
CTDNEP1BMPR2Q13873847
CTDNEP1LPIN1Q14693688
CTDNEP1BMP1P13497649
CTDNEP1LPIN3Q9BQK8649
CTDNEP1LPIN2Q92539593
CTDNEP1CTDP1Q9Y5B0550
CTDNEP1SFT2D1Q8WV19497
CTDNEP1GFM2Q969S9446
CTDNEP1MAL2Q969L2409
CTDNEP1MAN1B1Q9UKM7406
CTDNEP1STMP1E0CX11394
CTDNEP1RSL24D1Q9UHA3377
CTDNEP1ARMC8Q8IUR7377
CTDNEP1P4HA1P13674371

IntAct

52 interactions, top by confidence:

ABTypeScore
CDCA3CTDSPLpsi-mi:“MI:0914”(association)0.670
MCTDNEP1psi-mi:“MI:0915”(physical association)0.580
CTDNEP1UBQLN2psi-mi:“MI:0915”(physical association)0.560
EVA1CUPK3BL1psi-mi:“MI:0914”(association)0.530
PLXDC2UPK3BL1psi-mi:“MI:0914”(association)0.530
CCDC107PLD2psi-mi:“MI:0914”(association)0.530
TLR5MAN1A2psi-mi:“MI:0914”(association)0.530
SRPRBCTDNEP1psi-mi:“MI:0914”(association)0.530
CNEP1R1CTDNEP1psi-mi:“MI:0915”(physical association)0.460
CTDNEP1CNEP1R1psi-mi:“MI:0403”(colocalization)0.460
CTDNEP1psi-mi:“MI:0915”(physical association)0.400
FAM189BKLRG2psi-mi:“MI:0914”(association)0.350
OLFM2ZSWIM8psi-mi:“MI:0914”(association)0.350
SRPRBGOSR1psi-mi:“MI:0914”(association)0.350
SLC17A2PSMD11psi-mi:“MI:0914”(association)0.350
PDGFRBABCD4psi-mi:“MI:0914”(association)0.350
HLA-DRB1CTDNEP1psi-mi:“MI:0914”(association)0.350
ORF4CTDNEP1psi-mi:“MI:0914”(association)0.350
TMEM223psi-mi:“MI:0914”(association)0.350
CTDNEP1HAX1psi-mi:“MI:0914”(association)0.350
ARL6IP1ESYT2psi-mi:“MI:0914”(association)0.350
TTMPTMEM223psi-mi:“MI:0914”(association)0.350

BioGRID (91): CTDNEP1 (Affinity Capture-RNA), CTDNEP1 (Affinity Capture-RNA), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), CTDNEP1 (Affinity Capture-MS), ATP2A2 (Affinity Capture-MS), HAX1 (Affinity Capture-MS), TUBB6 (Affinity Capture-MS), ACBD5 (Proximity Label-MS)

ESM2 similar proteins: A0A3L7I2I8, A6H7H7, D4ABP9, O60733, O95476, P37287, P97570, P97819, Q12980, Q1RMV9, Q20432, Q28EX9, Q28HW9, Q29I63, Q2KIX2, Q2KJD7, Q2TBU5, Q3B7T6, Q3TP92, Q3U1V6, Q3UHB1, Q4R678, Q5F480, Q5FWT7, Q5R4C4, Q5TFE4, Q5U395, Q5U3T3, Q5ZJJ8, Q61C05, Q66H63, Q6NWD4, Q6NYU2, Q80YV4, Q86UY8, Q8AYC9, Q8BGR9, Q8BM85, Q8JIL9, Q8VIJ8

Diamond homologs: A4QNX6, M9PFN0, O13636, O14595, O15194, O59718, O95476, P0CN66, P0CN67, P38757, P58465, P58466, Q02776, Q05D32, Q07800, Q07949, Q08BB5, Q09695, Q1RMV9, Q20432, Q28HW9, Q29I63, Q3B7T6, Q3KQB6, Q3TP92, Q3ZCQ8, Q4I099, Q4PEW9, Q4WI16, Q54GB2, Q59W44, Q5B4P0, Q5F3Z7, Q5RAJ8, Q5S7T7, Q5U395, Q5U3T3, Q5XIK8, Q61C05, Q66KM5

SIGNOR signaling

3 interactions.

AEffectBMechanism
CTDNEP1up-regulatesBMPR1Abinding
CTDNEP1down-regulatesBMPR2binding
CTDNEP1“up-regulates activity”LPIN1dephosphorylation

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic1
Likely pathogenic0
Uncertain significance16
Likely benign0
Benign0

Top pathogenic / likely-pathogenic (1)

Variant IDHGVSClassification
3242525Single allelePathogenic

SpliceAI

1620 predictions. Top by Δscore:

VariantEffectΔscore
17:7244545:CCTTA:Cdonor_loss1.0000
17:7244546:CTTA:Cdonor_loss1.0000
17:7244547:TTA:Tdonor_loss1.0000
17:7244547:TTAC:Tdonor_loss1.0000
17:7244548:TACCT:Tdonor_loss1.0000
17:7244549:ACC:Adonor_loss1.0000
17:7244549:ACCTG:Adonor_loss1.0000
17:7244550:C:Adonor_loss1.0000
17:7244550:CC:Cdonor_loss1.0000
17:7244632:TTGT:Tacceptor_gain1.0000
17:7244634:GT:Gacceptor_gain1.0000
17:7244636:C:CCacceptor_gain1.0000
17:7244645:G:Cacceptor_gain1.0000
17:7244645:G:GCacceptor_gain1.0000
17:7244651:A:ACacceptor_gain1.0000
17:7244651:A:Cacceptor_gain1.0000
17:7244700:T:Cacceptor_gain1.0000
17:7246249:CTTA:Cdonor_loss1.0000
17:7246250:TTACC:Tdonor_loss1.0000
17:7246251:TACCT:Tdonor_loss1.0000
17:7246252:A:ACdonor_gain1.0000
17:7246252:ACCTG:Adonor_loss1.0000
17:7246253:C:CCdonor_gain1.0000
17:7246253:CCT:Cdonor_gain1.0000
17:7246253:CCTG:Cdonor_gain1.0000
17:7246253:CCTGT:Cdonor_gain1.0000
17:7246366:CTCAC:Cacceptor_gain1.0000
17:7246367:TCAC:Tacceptor_gain1.0000
17:7246368:CAC:Cacceptor_gain1.0000
17:7246368:CACC:Cacceptor_gain1.0000

AlphaMissense

0 scored. Top likely-pathogenic:

dbSNP variants (sampled 300 via entrez): RS1000358411 (17:7245406 G>T), RS1000925641 (17:7250300 T>C), RS1001311160 (17:7243687 T>C,G), RS1001722108 (17:7247383 G>A,T), RS1001815552 (17:7253480 G>A), RS1001869509 (17:7248616 C>T), RS1002006530 (17:7248728 C>G), RS1002093312 (17:7253617 T>A), RS1002161901 (17:7253714 G>C,T), RS1002502621 (17:7243759 C>G), RS1002918626 (17:7247430 C>T), RS1003684242 (17:7250009 G>A), RS1004021333 (17:7251346 G>T), RS1004073932 (17:7251514 G>A,T), RS1004103045 (17:7251954 C>G,T)

Disease associations

OMIM: gene MIM:610684 | disease phenotypes: MIM:619376

GenCC curated gene-disease

Mondo (1): Faundes-Banka syndrome (MONDO:0859163)

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

0 associations (top):

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

24 total (human), top 24 by PubMed support.

ChemicalActions (top 5)PubMed papers
sodium arsenitedecreases expression, affects cotreatment, increases abundance2
6,7-dimethoxy-2-(pyrrolidin-1-yl)-N-(5-(pyrrolidin-1-yl)pentyl)quinazolin-4-aminedecreases expression1
dicrotophosincreases expression1
triphenyl phosphateaffects expression1
bisphenol Aincreases expression1
beta-lapachonedecreases expression, increases expression1
manganese chloridedecreases expression, increases abundance, affects cotreatment1
di-n-butylphosphoric acidaffects expression1
CGP 52608affects binding, increases reaction1
4-(4-((5-(4,5-dimethyl-2-nitrophenyl)-2-furanyl)methylene)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzoic aciddecreases expression1
Sunitinibincreases expression1
Air Pollutantsaffects expression, increases abundance1
Arsenicdecreases expression, increases abundance, affects cotreatment1
Atrazineincreases expression1
Doxorubicinincreases expression1
Ivermectindecreases expression1
Manganesedecreases expression, increases abundance, affects cotreatment1
Ozoneaffects expression, increases abundance1
Seleniumaffects cotreatment, decreases expression, increases expression1
Smokedecreases expression1
Sodium Dodecyl Sulfateincreases expression1
Vitamin Eaffects cotreatment, decreases expression, increases expression1
Cyclosporineincreases expression1
Sodium Seleniteincreases expression1

Cellosaurus cell lines

3 cell lines: 2 cancer cell line, 1 transformed cell line

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

CellosaurusNameCategorySex
CVCL_B2VCAbcam HEK293T CTDNEP1 KOTransformed cell lineFemale
CVCL_SJ98HAP1 CTDNEP1 (-) 1Cancer cell lineMale
CVCL_SJ99HAP1 CTDNEP1 (-) 2Cancer cell lineMale

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

  • Disease cohort memberships (association, not causation — diseases whose associated-gene cohort lists this gene; a subset are also under Associated diseases): Faundes-Banka syndrome