Gene description for CLDN4
Gene name claudin 4
Gene symbol CLDN4
Other names/aliases CPE-R
CPER
CPETR
CPETR1
WBSCR8
hCPE-R
Species Homo sapiens
 Database cross references - CLDN4
ExoCarta ExoCarta_1364
Entrez Gene 1364
HGNC 2046
MIM 602909
UniProt O14493  
 CLDN4 identified in exosomes derived from the following tissue/cell type
Colorectal cancer cells 19837982    
Colorectal cancer cells 23161513    
Colorectal cancer cells 23161513    
Colorectal cancer cells 23161513    
Colorectal cancer cells 25890246    
Colorectal cancer cells 25890246    
Hepatocellular carcinoma cells 26054723    
Hepatocellular carcinoma cells 26054723    
Ovarian cancer cells 19619303    
Plasma 19619303    
 Gene ontology annotations for CLDN4
Molecular Function
    identical protein binding GO:0042802 ISS
    transmembrane signaling receptor activity GO:0004888 TAS
    structural molecule activity GO:0005198 IEA
Biological Process
    female pregnancy GO:0007565 IEA
    signal transduction GO:0007165 TAS
    calcium-independent cell-cell adhesion via plasma membrane cell-adhesion molecules GO:0016338 ISS
    response to progesterone GO:0032570 IEA
    establishment of skin barrier GO:0061436 IMP
Subcellular Localization
    plasma membrane GO:0005886 TAS
    apical plasma membrane GO:0016324 IEA
    basal plasma membrane GO:0009925 IEA
    bicellular tight junction GO:0005923 ISS
    apicolateral plasma membrane GO:0016327 IEA
    integral component of plasma membrane GO:0005887 IMP
    lateral plasma membrane GO:0016328 IEA
 Experiment description of studies that identified CLDN4 in exosomes
1
Experiment ID 21
ISEV standards
✔
EM|IEM
EV Biophysical techniques
✔
Alix|TSG101|HSP70
EV Cytosolic markers
✔
CD63
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method
Mass spectrometry   
PubMed ID 19837982    
Organism Homo sapiens
Experiment description Proteomic and bioinformatic analysis of immunoaffinity-purified exosomes derived from the human colon tumor cell line LIM1215.
Authors Suresh Mathivanan, Justin W.E. Lim, Bow J. Tauro, Hong Ji, Robert L. Moritz and Richard J. Simpson
Journal name MCP
Publication year 2009
Sample Colorectal cancer cells
Sample name LIM1215
Isolation/purification methods Filtration
Ultracentrifugation
Sucrose density gradient
Flotation density 1.10-1.12 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [Orbitrap]
Western blotting
2
Experiment ID 207
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|HSP70
EV Cytosolic markers
✔
FLOT1
EV Membrane markers
✔
VDAC
EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23161513    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes from mutant KRAS colon cancer cells identifies intercellular transfer of mutant KRAS.
Authors Demory Beckler M, Higginbotham JN, Franklin JL, Ham AJ, Halvey PJ, Imasuen IE, Whitwell C, Li M, Liebler DC, Coffey RJ.
Journal name Mol Cell Proteomics
Publication year 2012
Sample Colorectal cancer cells
Sample name DKO-1
Isolation/purification methods Differential centrifugation
Filtration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
3
Experiment ID 208
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|HSP70
EV Cytosolic markers
✔
FLOT1
EV Membrane markers
✔
VDAC
EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23161513    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes from mutant KRAS colon cancer cells identifies intercellular transfer of mutant KRAS.
Authors Demory Beckler M, Higginbotham JN, Franklin JL, Ham AJ, Halvey PJ, Imasuen IE, Whitwell C, Li M, Liebler DC, Coffey RJ.
Journal name Mol Cell Proteomics
Publication year 2012
Sample Colorectal cancer cells
Sample name Dks-8
Isolation/purification methods Differential centrifugation
Filtration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
4
Experiment ID 209
ISEV standards
✘ EV Biophysical techniques
✔
TSG101|HSP70
EV Cytosolic markers
✔
FLOT1
EV Membrane markers
✔
VDAC
EV Negative markers
✔
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23161513    
Organism Homo sapiens
Experiment description Proteomic analysis of exosomes from mutant KRAS colon cancer cells identifies intercellular transfer of mutant KRAS.
Authors Demory Beckler M, Higginbotham JN, Franklin JL, Ham AJ, Halvey PJ, Imasuen IE, Whitwell C, Li M, Liebler DC, Coffey RJ.
Journal name Mol Cell Proteomics
Publication year 2012
Sample Colorectal cancer cells
Sample name DLD-1
Isolation/purification methods Differential centrifugation
Filtration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
5
Experiment ID 285
ISEV standards
✔
CEM
EV Biophysical techniques
✔
Alix|TSG101
EV Cytosolic markers
✔
CD63|CD81|EpCAM
EV Membrane markers
✘ EV Negative markers
✔
DLS
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25890246    
Organism Homo sapiens
Experiment description Highly-purified exosomes and shed microvesicles isolated from the human colon cancer cell line LIM1863 by sequential centrifugal ultrafiltration are biochemically and functionally distinct.
Authors Xu R, Greening DW, Rai A, Ji H, Simpson RJ.
Journal name Methods
Publication year 2015
Sample Colorectal cancer cells
Sample name LIM1863 - Sequential centrifugal ultrafiltration - Rep 1
Isolation/purification methods Differential centrifugation
Filtration
Sequential centrifugal ultrafiltration
Centrifugal concentration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
Western blotting
6
Experiment ID 286
ISEV standards
✔
CEM
EV Biophysical techniques
✔
Alix|TSG101
EV Cytosolic markers
✔
CD63|CD81|EpCAM
EV Membrane markers
✘ EV Negative markers
✔
DLS
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25890246    
Organism Homo sapiens
Experiment description Highly-purified exosomes and shed microvesicles isolated from the human colon cancer cell line LIM1863 by sequential centrifugal ultrafiltration are biochemically and functionally distinct.
Authors Xu R, Greening DW, Rai A, Ji H, Simpson RJ.
Journal name Methods
Publication year 2015
Sample Colorectal cancer cells
Sample name LIM1863 - Sequential centrifugal ultrafiltration - Rep 2
Isolation/purification methods Differential centrifugation
Filtration
Sequential centrifugal ultrafiltration
Centrifugal concentration
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
Western blotting
7
Experiment ID 235
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|Alix|HSC70|GAPDH
EV Cytosolic markers
✘ EV Membrane markers
✔
HSP90B1
EV Negative markers
✔
qNano
EV Particle analysis
Identified molecule mRNA
Identification method RNA Sequencing
PubMed ID 26054723    
Organism Homo sapiens
Experiment description Hepatocellular carcinoma-derived exosomes promote motility of immortalized hepatocyte through transfer of oncogenic proteins and RNAs
Authors He M, Qin H, Poon TC, Sze SC, Ding X, Co NN, Ngai SM, Chan TF, Wong N
Journal name Carcinogenesis
Publication year 2015
Sample Hepatocellular carcinoma cells
Sample name HKCI-8
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Sucrose density gradient
Flotation density 1.13-1.19 g/mL
Molecules identified in the study Protein
RNA
Methods used in the study Western blotting
Mass spectrometry
RT-PCR
RNA Sequencing
8
Experiment ID 236
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|Alix|HSC70|GAPDH
EV Cytosolic markers
✘ EV Membrane markers
✔
HSP90B1
EV Negative markers
✔
qNano
EV Particle analysis
Identified molecule mRNA
Identification method RNA Sequencing
PubMed ID 26054723    
Organism Homo sapiens
Experiment description Hepatocellular carcinoma-derived exosomes promote motility of immortalized hepatocyte through transfer of oncogenic proteins and RNAs
Authors He M, Qin H, Poon TC, Sze SC, Ding X, Co NN, Ngai SM, Chan TF, Wong N
Journal name Carcinogenesis
Publication year 2015
Sample Hepatocellular carcinoma cells
Sample name MHCC97L
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Sucrose density gradient
Flotation density 1.13-1.19 g/mL
Molecules identified in the study Protein
RNA
Methods used in the study Western blotting
Mass spectrometry
RT-PCR
RNA Sequencing
9
Experiment ID 67
ISEV standards
✔
EM
EV Biophysical techniques
✘ EV Cytosolic markers
✘ EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Western blotting
Immunoelectron Microscopy
PubMed ID 19619303    
Organism Homo sapiens
Experiment description Claudin-containing exosomes in the peripheral circulation of women with ovarian cancer.
Authors Li J, Sherman-Baust CA, Tsai-Turton M, Bristow RE, Roden RB, Morin PJ
Journal name BMC_CANCER
Publication year 2009
Sample Ovarian cancer cells
Sample name BG-1
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Flotation density 1.15-1.21 g/mL
Molecules identified in the study Protein
Methods used in the study Western blotting
Immunoelectron Microscopy
10
Experiment ID 68
ISEV standards
✘ EV Biophysical techniques
✘ EV Cytosolic markers
✘ EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Western blotting
PubMed ID 19619303    
Organism Homo sapiens
Experiment description Claudin-containing exosomes in the peripheral circulation of women with ovarian cancer.
Authors Li J, Sherman-Baust CA, Tsai-Turton M, Bristow RE, Roden RB, Morin PJ
Journal name BMC_CANCER
Publication year 2009
Sample Plasma
Sample name Plasma - Ovarian cancer
Isolation/purification methods Differential centrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Western blotting
 Protein-protein interactions for CLDN4
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 TJP1 7082
Invitro Homo sapiens
View the network image/svg+xml
 Pathways in which CLDN4 is involved
PathwayEvidenceSource
Tight junction interactions TAS Reactome





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