Gene description for TSPO
Gene name translocator protein (18kDa)
Gene symbol TSPO
Other names/aliases BPBS
BZRP
DBI
IBP
MBR
PBR
PBS
PKBS
PTBR
mDRC
pk18
Species Homo sapiens
 Database cross references - TSPO
ExoCarta ExoCarta_706
Vesiclepedia VP_706
Entrez Gene 706
HGNC 1158
MIM 109610
UniProt P30536  
 TSPO identified in exosomes derived from the following tissue/cell type
Mesenchymal stem cells 36408942    
Retinal pigment epithelial cells 35333565    
Retinal pigment epithelial cells 35333565    
Urine 19056867    
 Gene ontology annotations for TSPO
Molecular Function
    androgen binding GO:0005497 IEA
    protein binding GO:0005515 IPI
    benzodiazepine receptor activity GO:0008503 IEA
    cholesterol binding GO:0015485 TAS
    transmembrane transporter binding GO:0044325 IEA
    cholesterol transfer activity GO:0120020 TAS
Biological Process
    protein targeting to mitochondrion GO:0006626 TAS
    C21-steroid hormone biosynthetic process GO:0006700 TAS
    heme biosynthetic process GO:0006783 TAS
    monoatomic anion transport GO:0006820 TAS
    chloride transport GO:0006821 IEA
    steroid metabolic process GO:0008202 TAS
    glial cell migration GO:0008347 IEA
    response to xenobiotic stimulus GO:0009410 IEA
    response to manganese ion GO:0010042 IEA
    response to vitamin B1 GO:0010266 IEA
    peripheral nervous system axon regeneration GO:0014012 IEA
    sterol transport GO:0015918 IEA
    adrenal gland development GO:0030325 IEA
    negative regulation of protein ubiquitination GO:0031397 IEA
    regulation of cholesterol transport GO:0032374 TAS
    response to progesterone GO:0032570 IEA
    negative regulation of tumor necrosis factor production GO:0032720 IEA
    response to testosterone GO:0033574 IEA
    regulation of cell population proliferation GO:0042127 TAS
    cholesterol homeostasis GO:0042632 IEA
    positive regulation of apoptotic process GO:0043065 IEA
    negative regulation of nitric oxide biosynthetic process GO:0045019 IEA
    behavioral response to pain GO:0048266 IEA
    regulation of steroid biosynthetic process GO:0050810 IEA
    positive regulation of mitochondrial depolarization GO:0051901 IEA
    positive regulation of calcium ion transport GO:0051928 IEA
    contact inhibition GO:0060242 IEA
    positive regulation of glial cell proliferation GO:0060252 IEA
    negative regulation of glial cell proliferation GO:0060253 IEA
    positive regulation of programmed necrotic cell death GO:0062100 IEA
    cellular response to lipopolysaccharide GO:0071222 IEA
    cellular response to zinc ion GO:0071294 IEA
    cellular hypotonic response GO:0071476 IEA
    maintenance of protein location in mitochondrion GO:0072656 IEA
    negative regulation of mitophagy GO:1901525 IEA
    negative regulation of ATP metabolic process GO:1903579 IEA
    response to acetylcholine GO:1905144 IEA
    positive regulation of reactive oxygen species metabolic process GO:2000379 IEA
    negative regulation of corticosterone secretion GO:2000853 IEA
Subcellular Localization
    mitochondrion GO:0005739 HTP
    mitochondrion GO:0005739 IDA
    mitochondrial outer membrane GO:0005741 TAS
    cytosol GO:0005829 IDA
    membrane GO:0016020 IBA
    intracellular membrane-bounded organelle GO:0043231 IDA
    extracellular exosome GO:0070062 HDA
 Experiment description of studies that identified TSPO in exosomes
1
Experiment ID 488
MISEV standards
EM
Biophysical techniques
CD9|CD81|CD63|GAPDH|SDCBP|LAMP1|TFRC|UCHL1|FLOT2|LAMP2|FLOT1|ICAM1|RAB5B|CD151|RAB35|TSG101|RAB5A|CD82
Enriched markers
CANX
Negative markers
NTA
Particle analysis
Identified molecule Protein
Identification method Mass spectrometry
PubMed ID 36408942    
Organism Homo sapiens
Experiment description Quantitative proteomic analysis of exosomes from umbilical cord mesenchymal stem cells and rat bone marrow stem cells
Authors "Xu X, Yin F, Guo M, Gan G, Lin G, Wen C, Wang J, Song P, Wang J, Qi ZQ, Zhong CQ."
Journal name Proteomics
Publication year 2023
Sample Mesenchymal stem cells
Sample name UCMSC
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Western blotting
Mass spectometry
2
Experiment ID 834
MISEV standards
EM
Biophysical techniques
LAMP2|CD63|FLOT1|ITGA2B|ICAM1|CD9|CD151|TFRC|RAB5A|GAPDH|AQP1|TSG101
Enriched markers
CANX
Negative markers
NTA
Particle analysis
Identified molecule Protein
Identification method Mass spectrometry
PubMed ID 35333565    
Organism Homo sapiens
Experiment description LAMP2A regulates the loading of proteins into exosomes
Authors "Ferreira JV, da Rosa Soares A, Ramalho J, Máximo Carvalho C, Cardoso MH, Pintado P, Carvalho AS, Beck HC, Matthiesen R, Zuzarte M, Girão H, van Niel G, Pereira P"
Journal name Sci Adv
Publication year 2022
Sample Retinal pigment epithelial cells
Sample name ARPE-19
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Western blotting
Mass spectrometry
3
Experiment ID 835
MISEV standards
EM
Biophysical techniques
CD63|FLOT1|ITGA2B|ICAM1|CD9|CD151|TFRC|RAB5A|GAPDH|AQP1|TSG101
Enriched markers
CANX
Negative markers
NTA
Particle analysis
Identified molecule Protein
Identification method Mass spectrometry
PubMed ID 35333565    
Organism Homo sapiens
Experiment description LAMP2A regulates the loading of proteins into exosomes
Authors "Ferreira JV, da Rosa Soares A, Ramalho J, Máximo Carvalho C, Cardoso MH, Pintado P, Carvalho AS, Beck HC, Matthiesen R, Zuzarte M, Girão H, van Niel G, Pereira P"
Journal name Sci Adv
Publication year 2022
Sample Retinal pigment epithelial cells
Sample name ARPE-19
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Western blotting
Mass spectrometry
4
Experiment ID 63
MISEV standards
Biophysical techniques
AQP2
Enriched markers
Negative markers
Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 19056867    
Organism Homo sapiens
Experiment description Large-scale proteomics and phosphoproteomics of urinary exosomes.
Authors "Gonzales PA, Pisitkun T, Hoffert JD, Tchapyjnikov D, Star RA, Kleta R, Wang NS, Knepper MA"
Journal name JASN
Publication year 2009
Sample Urine
Sample name Urine - Normal
Isolation/purification methods Differential centrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [LTQ]
Western blotting
 Protein-protein interactions for TSPO
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 SLC2A12 154091
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
2 CISD1 55847
Co-fractionation Homo sapiens
3 Tmed10 68581
Affinity Capture-MS Mus musculus
4 Ormdl1  
Affinity Capture-MS Mus musculus
5 DDX3Y 8653
Affinity Capture-MS Homo sapiens
6 BZRAP1  
Two-hybrid Homo sapiens
Reconstituted Complex Homo sapiens
7 ATP5A1 498
Co-fractionation Homo sapiens
8 ATP5F1 515
Co-fractionation Homo sapiens
9 IFITM3 10410
Affinity Capture-MS Homo sapiens
10 AQP3  
Affinity Capture-MS Homo sapiens
11 ARF4 378
Co-fractionation Homo sapiens
12 CREB3L1  
Two-hybrid Homo sapiens
13 ATP5L 10632
Co-fractionation Homo sapiens
14 VDAC2 7417
Co-fractionation Homo sapiens
15 PYGM 5837
Affinity Capture-MS Homo sapiens
16 SLC5A8 160728
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
17 ADORA3  
Affinity Capture-MS Homo sapiens
18 KIF14 9928
Affinity Capture-MS Homo sapiens
19 GPR182  
Affinity Capture-MS Homo sapiens
20 VDAC1 7416
Co-fractionation Homo sapiens
21 VDAC3 7419
Co-fractionation Homo sapiens
22 ATP5O 539
Co-fractionation Homo sapiens
23 CRABP1  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
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