CPTP

gene
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Also known as MGC10334

Summary

CPTP (ceramide-1-phosphate transfer protein, HGNC:28116) is a protein-coding gene on chromosome 1p36.33, encoding Ceramide-1-phosphate transfer protein (Q5TA50). Mediates the intracellular transfer of ceramide-1-phosphate (C1P) between organelle membranes and the cell membrane.

Enables ceramide 1-phosphate binding activity and ceramide 1-phosphate transfer activity. Involved in ceramide 1-phosphate transport; negative regulation of NLRP3 inflammasome complex assembly; and negative regulation of metabolic process. Located in cytosol.

Source: NCBI Gene 80772 — RefSeq curated summary.

At a glance

  • GWAS associations: 2
  • Clinical variants (ClinVar): 64 total
  • MANE Select transcript: NM_001029885

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:28116
Approved symbolCPTP
Nameceramide-1-phosphate transfer protein
Location1p36.33
Locus typegene with protein product
StatusApproved
AliasesMGC10334
Ensembl geneENSG00000224051
Ensembl biotypeprotein_coding
OMIM615467
Entrez80772

Gene structure

Transcript identifiers

Ensembl transcripts: 10 — 9 protein_coding, 1 protein_coding_CDS_not_defined

ENST00000343938, ENST00000464957, ENST00000488011, ENST00000900278, ENST00000900279, ENST00000900280, ENST00000900281, ENST00000900282, ENST00000900283, ENST00000956293

RefSeq mRNA: 1 — MANE Select: NM_001029885 NM_001029885

CCDS: CCDS30555

Canonical transcript exons

ENST00000343938 — 3 exons

ExonStartEnd
ENSE0000171459313272411328896
ENSE0000183155013248021325102
ENSE0000272581513268361327032

Expression profiles

Bgee: expression breadth ubiquitous, 278 present calls, max score 97.48.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 28.3689 / max 189.8881, expressed in 1810 samples.

FANTOM5 promoters (2 alternative TSS)

Promoter IDTPM avgSamples expressed
8428.29371810
870.07523

Top tissues by expression

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

TissueAnatomy IDExpression scoreQuality
apex of heartUBERON:000209897.48gold quality
lower esophagus mucosaUBERON:003583495.85gold quality
heart left ventricleUBERON:000208494.77gold quality
cardiac ventricleUBERON:000208294.64gold quality
left testisUBERON:000453394.37gold quality
hindlimb stylopod muscleUBERON:000425294.16gold quality
mucosa of transverse colonUBERON:000499194.12gold quality
right testisUBERON:000453493.97gold quality
parotid glandUBERON:000183192.73gold quality
right lobe of liverUBERON:000111492.55gold quality
testisUBERON:000047392.28gold quality
triceps brachiiUBERON:000150991.92gold quality
diaphragmUBERON:000110391.25gold quality
heart right ventricleUBERON:000208090.99gold quality
esophagus mucosaUBERON:000246990.64gold quality
gluteal muscleUBERON:000200090.45gold quality
tendon of biceps brachiiUBERON:000818890.25gold quality
heartUBERON:000094889.94gold quality
vastus lateralisUBERON:000137989.70gold quality
buccal mucosa cellCL:000233689.62gold quality
cervix squamous epitheliumUBERON:000692289.57gold quality
metanephros cortexUBERON:001053389.52gold quality
body of stomachUBERON:000116189.14gold quality
saliva-secreting glandUBERON:000104489.01gold quality
transverse colonUBERON:000115788.94gold quality
quadriceps femorisUBERON:000137788.86gold quality
corpus epididymisUBERON:000435988.84gold quality
left ventricle myocardiumUBERON:000656688.63gold quality
skin of legUBERON:000151188.62gold quality
gastrocnemiusUBERON:000138888.48gold quality

Single-cell (SCXA)

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

ExperimentMarker?Max mean expression
E-ANND-3yes4.30

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

34 targeting CPTP, 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-118499.9968.191458
HSA-MIR-426799.9666.532368
HSA-MIR-449299.8768.253611
HSA-MIR-442899.7366.411733
HSA-MIR-378G99.7164.901106
HSA-MIR-7-5P99.6770.531809
HSA-MIR-76299.5866.611994
HSA-MIR-449899.4767.422360
HSA-MIR-450599.2767.812678
HSA-MIR-4685-5P99.2565.991563
HSA-MIR-6837-5P99.2565.471632
HSA-MIR-578799.2267.862628
HSA-MIR-499A-3P99.1869.201392
HSA-MIR-499B-3P99.1869.271391
HSA-MIR-6852-5P99.1766.692073
HSA-MIR-6868-5P99.0665.691284
HSA-MIR-5001-5P99.0566.761972
HSA-MIR-939-3P98.9765.072347
HSA-MIR-6829-5P98.8665.121480
HSA-MIR-465698.7966.221306
HSA-MIR-423-5P98.6967.481522
HSA-MIR-3184-5P98.5667.131491
HSA-MIR-615-5P98.1063.76591
HSA-MIR-6842-3P98.0766.331325
HSA-MIR-446997.9365.811319
HSA-MIR-6787-3P97.7566.171233
HSA-MIR-365297.7165.431890
HSA-MIR-467597.6964.82774
HSA-MIR-474197.6964.14883
HSA-MIR-443097.4765.611813

Literature-anchored findings (GeneRIF, showing 6)

  • a ubiquitously expressed lipid transfer protein, human GLTPD1, named here CPTP, is shown to specifically transfer C1P between membranes. (PMID:23863933)
  • These findings identify human CPTP as an endogenous regulator of early-stage autophagosome assembly and inflammasome-driven, pro-inflammatory cytokine generation and release. (PMID:29164996)
  • Ceramide-1-phosphate transfer protein (CPTP) regulation by phosphoinositides. (PMID:33781749)
  • Ceramide-1-phosphate and its transfer proteins in eukaryotes. (PMID:34499882)
  • Ceramide-1-phosphate transfer protein promotes sphingolipid reorientation needed for binding during membrane interaction. (PMID:34808193)
  • Human CPTP promotes growth and metastasis via sphingolipid metabolite ceramide and PI4KA/AKT signaling in pancreatic cancer cells. (PMID:35982909)

Cross-species orthologs

10 orthologs

OrganismSymbolGene ID
danio_reriocptpENSDARG00000052537
danio_reriogltpd2aENSDARG00000054218
danio_reriogltpd2bENSDARG00000067889
mus_musculusCptpENSMUSG00000029073
rattus_norvegicusCptpENSRNOG00000022455
rattus_norvegicusENSRNOG00000064148
drosophila_melanogasterCG6299FBGN0030641
caenorhabditis_eleganstag-296WBGENE00018632
caenorhabditis_elegansWBGENE00022347
caenorhabditis_elegansF49D11.10WBGENE00045433

Paralogs (5): PLEKHA8 (ENSG00000106086), CERT1 (ENSG00000113163), PLEKHA3 (ENSG00000116095), GLTP (ENSG00000139433), GLTPD2 (ENSG00000182327)

Protein

Protein identifiers

Ceramide-1-phosphate transfer proteinQ5TA50 (reviewed: Q5TA50)

Alternative names: Glycolipid transfer protein domain-containing protein 1

All UniProt accessions (3): Q5TA50, J3KST3, S4S694

UniProt curated annotations — full annotation on UniProt →

Function. Mediates the intracellular transfer of ceramide-1-phosphate (C1P) between organelle membranes and the cell membrane. Required for normal structure of the Golgi stacks. Can bind phosphoceramides with a variety of aliphatic chains, but has a preference for lipids with saturated C16:0 or monounsaturated C18:1 aliphatic chains, and is inefficient with phosphoceramides containing lignoceryl (C24:0). Plays a role in the regulation of the cellular levels of ceramide-1-phosphate, and thereby contributes to the regulation of phospholipase PLA2G4A activity and the release of arachidonic acid. Has no activity with galactosylceramide, lactosylceramide, sphingomyelin, phosphatidylcholine, phosphatidic acid and ceramide. C1P transfer is stimulated by phosphatidylserine in C1P source vesicles. Regulates autophagy, inflammasome mediated IL1B and IL18 processing, and pyroptosis, but not apoptosis.

Subcellular location. Cytoplasm. Cytosol. Golgi apparatus. trans-Golgi network membrane. Cell membrane. Endosome membrane. Nucleus outer membrane.

Tissue specificity. Ubiquitous. Detected in heart, brain, placenta, lung, liver, skeletal muscle, kidney, pancreas, spleen, thymus, prostate, testis, ovary, small intestine, colon and peripheral blood leukocytes.

Similarity. Belongs to the GLTP family.

RefSeq proteins (1): NP_001025056* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR014830Glycolipid_transfer_prot_domDomain
IPR036497GLTP_sfHomologous_superfamily

Pfam: PF08718

Catalyzed reactions (Rhea), 2 shown:

  • N-(hexadecanoyl)-sphing-4-enine-1-phosphate(in) = N-(hexadecanoyl)-sphing-4-enine-1-phosphate(out) (RHEA:45680)
  • N-(9Z-octadecenoyl)-sphing-4-enine-1-phosphate(in) = N-(9Z-octadecenoyl)-sphing-4-enine-1-phosphate(out) (RHEA:45688)

UniProt features (35 total): mutagenesis site 14, helix 13, binding site 5, strand 2, chain 1

Structure

Experimental structures (PDB)

6 structures.

PDBMethodResolution (Å)
4K84X-RAY DIFFRACTION1.9
4KBSX-RAY DIFFRACTION1.9
4K85X-RAY DIFFRACTION1.9
4K80X-RAY DIFFRACTION2.05
4K8NX-RAY DIFFRACTION3.1
4KF6X-RAY DIFFRACTION3.19

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q5TA50-F193.930.87

Functional residue map

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

Ligand- & substrate-binding residues (5): 56; 60; 106; 110; 150

Mutagenesis-validated functional residues (14):

PositionPhenotype
56slightly decreases phosphoceramide transfer.
60nearly abolishes phosphoceramide transfer. induces autophagy in a dominant negative manner.
97no effect.
106nearly abolishes phosphoceramide transfer. induces autophagy in a dominant negative manner.
110reduces phosphoceramide transfer.
113strongly reduces phosphoceramide transfer.
117slightly reduces phosphoceramide transfer.
118abolishes phosphoceramide transfer.
149reduces phosphoceramide transfer.
158abolishes phosphoceramide transfer.
42increases phosphoceramide transfer.
43nearly abolishes phosphoceramide transfer.
50slightly reduces phosphoceramide transfer.
53slightly decreases phosphoceramide transfer.

Function

Pathways and Gene Ontology

Reactome pathways

1 pathways

IDPathway
R-HSA-9845576Glycosphingolipid transport

MSigDB gene sets: 149 (showing top): GOBP_NEGATIVE_REGULATION_OF_PROTEIN_CONTAINING_COMPLEX_ASSEMBLY, GOBP_REGULATION_OF_AUTOPHAGY, GOBP_NEGATIVE_REGULATION_OF_INTERLEUKIN_1_PRODUCTION, GOBP_INFLAMMATORY_RESPONSE, GRAESSMANN_APOPTOSIS_BY_DOXORUBICIN_DN, GRAESSMANN_RESPONSE_TO_MC_AND_DOXORUBICIN_DN, IVANOVA_HEMATOPOIESIS_LATE_PROGENITOR, GOBP_REGULATION_OF_CELLULAR_COMPONENT_BIOGENESIS, GOBP_INTERLEUKIN_1_PRODUCTION, GOBP_NEGATIVE_REGULATION_OF_INTRACELLULAR_SIGNAL_TRANSDUCTION, GOBP_NEGATIVE_REGULATION_OF_CELLULAR_COMPONENT_ORGANIZATION, GOBP_ORGANOPHOSPHATE_ESTER_TRANSPORT, GOBP_POSITIVE_REGULATION_OF_RESPONSE_TO_EXTERNAL_STIMULUS, GOBP_NEGATIVE_REGULATION_OF_AUTOPHAGY, GOBP_REGULATION_OF_IMMUNE_RESPONSE

GO Biological Process (7): negative regulation of autophagy (GO:0010507), negative regulation of interleukin-1 beta production (GO:0032691), ceramide transport (GO:0035627), intermembrane lipid transfer (GO:0120009), negative regulation of NLRP3 inflammasome complex assembly (GO:1900226), ceramide 1-phosphate transport (GO:1902389), lipid transport (GO:0006869)

GO Molecular Function (5): phospholipid binding (GO:0005543), ceramide 1-phosphate binding (GO:1902387), ceramide 1-phosphate transfer activity (GO:1902388), lipid binding (GO:0008289), lipid transfer activity (GO:0120013)

GO Cellular Component (12): nuclear outer membrane (GO:0005640), Golgi apparatus (GO:0005794), centriole (GO:0005814), cytosol (GO:0005829), plasma membrane (GO:0005886), endosome membrane (GO:0010008), perinuclear theca (GO:0033011), sperm midpiece (GO:0097225), nucleus (GO:0005634), cytoplasm (GO:0005737), endosome (GO:0005768), membrane (GO:0016020)

Reactome top-level categories

Rollup of top-1 pathways:

CategoryPathways
Transport of small molecules1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure4
lipid transport2
cytoplasm2
endomembrane system2
intracellular membrane-bounded organelle2
autophagy1
negative regulation of catabolic process1
regulation of autophagy1
interleukin-1 beta production1
regulation of interleukin-1 beta production1
negative regulation of interleukin-1 production1
nitrogen compound transport1
membrane organization1
negative regulation of protein-containing complex assembly1
NLRP3 inflammasome complex assembly1
negative regulation of inflammasome-mediated signaling pathway1
regulation of NLRP3 inflammasome complex assembly1
phospholipid transport1
ceramide transport1
transport1
lipid localization1
lipid binding1
phospholipid binding1
anion binding1
ceramide binding1
phospholipid transfer activity1
ceramide transfer activity1
ceramide 1-phosphate transport1
binding1
transporter activity1
lipid carrier activity1
intermembrane lipid transfer1
nuclear membrane1
organelle outer membrane1
nuclear outer membrane-endoplasmic reticulum membrane network1
microtubule organizing center1
intracellular membraneless organelle1
membrane1
cell periphery1
endosome1

Protein interactions and networks

STRING

494 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
CPTPGLTPQ9NZD2709
CPTPCERKQ8TCT0571
CPTPCERT1Q9Y5P4510
CPTPNOL9Q5SY16454
CPTPACER1Q8TDN7395
CPTPTAS1R3Q7RTX0375
CPTPZBTB48P10074364
CPTPASAH2Q9NR71357
CPTPSPTLC1O15269344
CPTPPAX7P23759344
CPTPPAX3P23760328
CPTPTAS1R1Q7RTX1327
CPTPDVL1O14640325
CPTPALDH4A1P30038322
CPTPTAS1R2Q8TE23322

IntAct

9 interactions, top by confidence:

ABTypeScore
CPTPLRRK2psi-mi:“MI:0407”(direct interaction)0.440
CPTPCD7psi-mi:“MI:0915”(physical association)0.370
CPTPECM1psi-mi:“MI:0915”(physical association)0.370
CPTPSMAD3psi-mi:“MI:0915”(physical association)0.370
ELOCCPTPpsi-mi:“MI:0915”(physical association)0.370
ZNF451CPTPpsi-mi:“MI:0915”(physical association)0.370
CPTPINPP5Kpsi-mi:“MI:0915”(physical association)0.370
PHF13CPTPpsi-mi:“MI:0915”(physical association)0.370

BioGRID (9): CPTP (Affinity Capture-RNA), CPTP (Protein-peptide), CPTP (Two-hybrid), ZNF451 (Two-hybrid), CPTP (Two-hybrid), SMAD3 (Two-hybrid), TCEB1 (Two-hybrid), INPP5K (Two-hybrid), PHF13 (Two-hybrid)

ESM2 similar proteins: A0A223HDI2, A2BG43, B0BLT4, B0BNM9, B0YN54, O22797, O64587, O94360, P40124, P68265, P68266, Q01518, Q08163, Q0VCQ0, Q2WBN3, Q3SYV4, Q3T1J9, Q4R4I6, Q54XJ0, Q5F495, Q5HZ92, Q5RAE0, Q5RDB1, Q5TA50, Q5XIS2, Q63ZQ3, Q66JG2, Q6DBQ8, Q6NLQ3, Q6NU44, Q6PEB6, Q6Z6S1, Q70IA6, Q7L9L4, Q8BPB0, Q8BS40, Q8GYX0, Q8VI63, Q921Y0, Q949G5

Diamond homologs: A6NH11, Q0VCQ0, Q5HZ92, Q5TA50, Q5XIS2, Q66JG2, Q6DBQ8, Q8BS40, Q8K0R6

SIGNOR signaling

0 interactions.

Disease & clinical

Clinical variants and AI predictions

ClinVar

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

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance50
Likely benign9
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

558 predictions. Top by Δscore:

VariantEffectΔscore
1:1326830:A:AGacceptor_gain0.9900
1:1326835:GAAA:Gacceptor_gain0.9900
1:1324883:G:GTdonor_gain0.9800
1:1325098:CCCAG:Cdonor_loss0.9800
1:1325099:CCAG:Cdonor_loss0.9800
1:1325100:CAGGT:Cdonor_loss0.9800
1:1325101:AGG:Adonor_loss0.9800
1:1325102:GGT:Gdonor_loss0.9800
1:1325103:G:Adonor_loss0.9800
1:1325104:T:Gdonor_loss0.9800
1:1326829:C:Gacceptor_gain0.9800
1:1326831:C:Gacceptor_gain0.9800
1:1326834:A:AGacceptor_gain0.9800
1:1326835:G:GGacceptor_gain0.9800
1:1326904:T:Gacceptor_gain0.9800
1:1327236:CACA:Cacceptor_loss0.9800
1:1327239:A:Cacceptor_loss0.9800
1:1327240:G:GAacceptor_loss0.9800
1:1326831:CACAG:Cacceptor_loss0.9700
1:1326832:ACAG:Aacceptor_loss0.9700
1:1326833:CA:Cacceptor_loss0.9700
1:1326834:A:Tacceptor_loss0.9700
1:1326906:A:AGacceptor_gain0.9700
1:1326907:A:Gacceptor_gain0.9700
1:1326983:G:GTdonor_gain0.9700
1:1327030:CAG:Cdonor_loss0.9700
1:1327031:AGGTG:Adonor_loss0.9700
1:1327033:GT:Gdonor_loss0.9700
1:1324879:TCCGG:Tdonor_gain0.9600
1:1326828:A:AGacceptor_gain0.9600

AlphaMissense

1381 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
1:1327013:A:CS35R0.990
1:1327015:C:AS35R0.990
1:1327015:C:GS35R0.990
1:1327016:T:AW36R0.985
1:1327016:T:CW36R0.985
1:1327456:G:CR113P0.985
1:1327600:C:AA161D0.985
1:1327566:C:GH150D0.981
1:1327455:C:AR113S0.977
1:1327467:T:AW117R0.977
1:1327467:T:CW117R0.977
1:1327375:A:TE86V0.972
1:1327568:C:AH150Q0.972
1:1327568:C:GH150Q0.972
1:1327471:T:CL118P0.971
1:1327266:T:CF50L0.969
1:1327268:C:AF50L0.969
1:1327268:C:GF50L0.969
1:1327243:T:CF42S0.968
1:1327566:C:AH150N0.968
1:1327298:G:CK60N0.965
1:1327298:G:TK60N0.965
1:1327276:T:AI53N0.962
1:1327429:G:AG104D0.962
1:1327431:T:CC105R0.962
1:1327462:T:CL115P0.962
1:1327542:T:GY142D0.962
1:1327530:T:CC138R0.961
1:1327588:C:AA157D0.961
1:1327630:T:CF171S0.960

dbSNP variants (sampled 300 via entrez): RS1000003240 (1:1324638 G>A,T), RS1000073352 (1:1325526 C>A,T), RS1000113484 (1:1328688 G>A), RS1000143029 (1:1328848 C>T), RS1000438273 (1:1324775 G>A), RS1001160690 (1:1326806 C>G,T), RS1001331534 (1:1325810 C>T), RS1001651729 (1:1324275 G>C), RS1001720675 (1:1323712 G>A), RS1001777686 (1:1327968 G>A,C,T), RS1001993670 (1:1322804 A>G), RS1002711481 (1:1325058 ACCGGTGCCCATCCAGT>A), RS1003003262 (1:1324823 G>C), RS1003250227 (1:1326317 G>A,C), RS1003794406 (1:1325988 G>A,T)

Disease associations

OMIM: gene MIM:615467 | disease phenotypes: MIM:615373, MIM:182212

GenCC curated gene-disease

Mondo (2): left ventricular noncompaction 8 (MONDO:0014152), Shprintzen-Goldberg syndrome (MONDO:0008426)

Orphanet (3): Familial isolated dilated cardiomyopathy (Orphanet:154), Left ventricular noncompaction (Orphanet:54260), Shprintzen-Goldberg syndrome (Orphanet:2462)

HPO phenotypes

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

GWAS associations

2 associations (top):

StudyTraitp-value
GCST004131_103Inflammatory bowel disease2.000000e-07
GCST004133_40Ulcerative colitis3.000000e-06

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

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

CTD chemical–gene interactions

28 total (human), top 28 by PubMed support.

ChemicalActions (top 5)PubMed papers
sodium arsenitedecreases expression, affects cotreatment, increases abundance, increases expression2
bisphenol Adecreases expression, affects cotreatment1
manganese chlorideincreases abundance, increases expression, affects cotreatment1
potassium chromate(VI)affects cotreatment, decreases expression1
ferrous chloridedecreases expression1
epigallocatechin gallateaffects cotreatment, decreases expression1
di-n-butylphosphoric acidaffects expression1
ICG 001decreases expression1
abrinedecreases expression1
(4-amino-1,4-dihydro-3-(2-pyridyl)-5-thioxo-1,2,4-triazole)copper(II)increases expression1
eprenetapoptaffects expression, affects reaction1
MT19c compounddecreases expression1
Resveratrolaffects cotreatment, decreases expression1
Sunitinibincreases expression1
Acetaminophendecreases expression1
Arsenicaffects cotreatment, increases abundance, increases expression1
Atrazineincreases expression1
Benzo(a)pyreneincreases methylation1
Dexamethasoneaffects cotreatment, decreases expression1
Doxorubicindecreases expression1
Indomethacinaffects cotreatment, decreases expression1
Manganeseincreases expression, affects cotreatment, increases abundance1
Plant Extractsdecreases expression, affects cotreatment1
Rotenonedecreases expression1
Smokedecreases expression1
Thiramdecreases expression1
Tobacco Smoke Pollutionincreases expression1
1-Methyl-3-isobutylxanthineaffects cotreatment, decreases expression1

Clinical trials (associated diseases)

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

TrialPhaseStatusTitle
NCT01322165Not specifiedCOMPLETEDNational Registry of Genetically Triggered Thoracic Aortic Aneurysms and Cardiovascular Conditions
NCT03440697Not specifiedACTIVE_NOT_RECRUITINGPathogenetic Basis of Aortopathy and Aortic Valve Disease