Gene description for PPP4R1
Gene name protein phosphatase 4, regulatory subunit 1
Gene symbol PPP4R1
Other names/aliases MEG1
PP4(Rmeg)
PP4R1
Species Homo sapiens
 Database cross references - PPP4R1
ExoCarta ExoCarta_9989
Entrez Gene 9989
HGNC 9320
MIM 604908
UniProt Q8TF05  
 PPP4R1 identified in exosomes derived from the following tissue/cell type
Hepatocellular carcinoma cells 26054723    
Prostate cancer cells 25844599    
 Gene ontology annotations for PPP4R1
Molecular Function
    protein phosphatase type 4 regulator activity GO:0030362 NAS
    protein binding GO:0005515 IPI
    phosphoprotein phosphatase activity GO:0004721 ISS
Biological Process
    dephosphorylation GO:0016311 ISS
    signal transduction GO:0007165 NAS
    protein phosphorylation GO:0006468 ISS
    regulation of catalytic activity GO:0050790 NAS
Subcellular Localization
    protein phosphatase 4 complex GO:0030289 ISS
 Experiment description of studies that identified PPP4R1 in exosomes
1
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
2
Experiment ID 275
ISEV standards
EM
EV Biophysical techniques
TSG101|Alix|RAB5A
EV Cytosolic markers
CD9|CD82|CD63|CD81
EV Membrane markers
AIF
EV Negative markers
NTA
EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 25844599    
Organism Homo sapiens
Experiment description Molecular profiling of prostate cancer derived exosomes may reveal a predictive signature for response to docetaxel.
Authors Kharaziha P, Chioureas D, Rutishauser D, Baltatzis G, Lennartsson L, Fonseca P, Azimi A, Hultenby K, Zubarev R, Ullen A, Yachnin J, Nilsson S, Panaretakis T.
Journal name Oncotarget
Publication year 2015
Sample Prostate cancer cells
Sample name DU145 - Docetaxel sensitive
Isolation/purification methods Filtration
Ultracentrifugation
Sucrose density gradient
Flotation density 1.12-1.19 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry/Flow cytometry/Western blotting
 Protein-protein interactions for PPP4R1
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 PPP4C 5531
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
Affinity Capture-Western Homo sapiens
Affinity Capture-MS Homo sapiens
Invitro Homo sapiens
Invivo Homo sapiens
Affinity Capture-MS Homo sapiens
View the network image/svg+xml
 Pathways in which PPP4R1 is involved
No pathways found





Perform bioinformatics analysis of your extracellular vesicle data set using FunRich, a open access standalone tool. NEW UPDATED VERSION OF FunRich available for download (12/09/2016) from here