Gene description for SAR1B
Gene name secretion associated, Ras related GTPase 1B
Gene symbol SAR1B
Other names/aliases ANDD
CMRD
GTBPB
SARA2
Species Homo sapiens
 Database cross references - SAR1B
ExoCarta ExoCarta_51128
Entrez Gene 51128
HGNC 10535
MIM 607690
UniProt Q9Y6B6  
 SAR1B identified in exosomes derived from the following tissue/cell type
Ovarian cancer cells 23333927    
Ovarian cancer cells 23333927    
Prostate cancer cells 25844599    
Squamous carcinoma cells 20124223    
 Gene ontology annotations for SAR1B
Molecular Function
    metal ion binding GO:0046872 IEA
    GTP binding GO:0005525 IEA
    GTPase activity GO:0003924 TAS
Biological Process
    protein N-linked glycosylation via asparagine GO:0018279 TAS
    cellular protein metabolic process GO:0044267 TAS
    antigen processing and presentation of peptide antigen via MHC class I GO:0002474 TAS
    small molecule metabolic process GO:0044281 TAS
    post-translational protein modification GO:0043687 TAS
    membrane organization GO:0061024 TAS
    antigen processing and presentation of exogenous peptide antigen via MHC class II GO:0019886 TAS
    intracellular protein transport GO:0006886 IEA
    COPII vesicle coating GO:0048208 TAS
    ER to Golgi vesicle-mediated transport GO:0006888 TAS
Subcellular Localization
    Golgi cisterna membrane GO:0032580 IEA
    ER to Golgi transport vesicle membrane GO:0012507 TAS
    cytosol GO:0005829 TAS
    endoplasmic reticulum membrane GO:0005789 TAS
 Experiment description of studies that identified SAR1B in exosomes
1
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
2
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
3
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
4
Experiment ID 191
ISEV standards
✘ EV Biophysical techniques
✔
Alix
EV Cytosolic markers
✔
CD81|CD9
EV Membrane markers
✘ EV Negative markers
✘ EV Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 20124223    
Organism Homo sapiens
Experiment description Hypoxic tumor cell modulates its microenvironment to enhance angiogenic and metastatic potential by secretion of proteins and exosomes.
Authors Park JE, Tan HS, Datta A, Lai RC, Zhang H, Meng W, Lim SK, Sze SK.
Journal name Mol Cell Proteomics
Publication year 2010
Sample Squamous carcinoma cells
Sample name Squamous carcinoma cell (A431)
Isolation/purification methods Differential centrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
 Protein-protein interactions for SAR1B
  Protein Interactor ExoCarta ID Identification method PubMed Species
No interactions are found.



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