Gene description for IMPA2
Gene name inositol(myo)-1(or 4)-monophosphatase 2
Gene symbol IMPA2
Other names/aliases -
Species Homo sapiens
 Database cross references - IMPA2
ExoCarta ExoCarta_3613
Entrez Gene 3613
HGNC 6051
MIM 605922
UniProt O14732  
 IMPA2 identified in exosomes derived from the following tissue/cell type
Hepatocellular carcinoma cells 26054723    
Hepatocellular carcinoma cells 26054723    
Ovarian cancer cells 23333927    
Ovarian cancer cells 23333927    
 Gene ontology annotations for IMPA2
Molecular Function
    protein homodimerization activity GO:0042803 IDA
    metal ion binding GO:0046872 IEA
    inositol monophosphate 3-phosphatase activity GO:0052832 IEA
    inositol monophosphate 4-phosphatase activity GO:0052833 IEA
    protein binding GO:0005515 IPI
    inositol monophosphate 1-phosphatase activity GO:0008934 IDA
Biological Process
    small molecule metabolic process GO:0044281 TAS
    inositol phosphate dephosphorylation GO:0046855 IDA
    inositol biosynthetic process GO:0006021 IEA
    signal transduction GO:0007165 TAS
    phosphate-containing compound metabolic process GO:0006796 TAS
    inositol phosphate metabolic process GO:0043647 TAS
    phosphatidylinositol phosphorylation GO:0046854 IEA
Subcellular Localization
    cytosol GO:0005829 TAS
    cytoplasm GO:0005737 IDA
 Experiment description of studies that identified IMPA2 in exosomes
1
Experiment ID 234
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-C3
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 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
3
Experiment ID 211
ISEV standards
✔
EM
EV Biophysical techniques
✔
TSG101|Alix
EV Cytosolic markers
✔
EpCAM|TFRC
EV Membrane markers
✔
cytochrome c|GOLGA2
EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23333927    
Organism Homo sapiens
Experiment description Characterization and proteomic analysis of ovarian cancer-derived exosomes.
Authors Liang B, Peng P, Chen S, Li L, Zhang M, Cao D, Yang J, Li H, Gui T, Li X, Shen K.
Journal name J Proteomics
Publication year 2013
Sample Ovarian cancer cells
Sample name IGROV1
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.09-1.15 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
4
Experiment ID 212
ISEV standards
✔
CEM
EV Biophysical techniques
✔
TSG101|Alix
EV Cytosolic markers
✔
EpCAM|TFRC
EV Membrane markers
✔
Cytochrome C|GOLGA2
EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23333927    
Organism Homo sapiens
Experiment description Characterization and proteomic analysis of ovarian cancer-derived exosomes.
Authors Liang B, Peng P, Chen S, Li L, Zhang M, Cao D, Yang J, Li H, Gui T, Li X, Shen K.
Journal name J Proteomics
Publication year 2013
Sample Ovarian cancer cells
Sample name OVCAR-3
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.09-1.15 g/mL
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
 Protein-protein interactions for IMPA2
  Protein Interactor ExoCarta ID Identification method PubMed Species
No interactions are found.
 Pathways in which IMPA2 is involved
PathwayEvidenceSource
Synthesis of IP2, IP, and Ins in the cytosol TAS Reactome





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