Gene description for Hspa4
Gene name heat shock protein 4
Gene symbol Hspa4
Other names/aliases Hsp110
Hsp70
irp94
Species Rattus norvegicus
 Database cross references - Hspa4
ExoCarta ExoCarta_266759
Vesiclepedia VP_266759
Entrez Gene 266759
UniProt O88600  
 Hspa4 identified in sEVs derived from the following tissue/cell type
Pancreatic cancer cells 20124479    
Pancreatic cancer cells 20124479    
Reticulocytes 21828046    
Reticulocytes 21828046    
Reticulocytes 21828046    
Reticulocytes 21828046    
Reticulocytes 21828046    
Reticulocytes 21828046    
 Gene ontology annotations for Hspa4
Molecular Function
    adenyl-nucleotide exchange factor activity GO:0000774 IBA
    protein binding GO:0005515 IPI
    ATP binding GO:0005524 IEA
    protein-containing complex binding GO:0044877 IPI
    RNA polymerase II-specific DNA-binding transcription factor binding GO:0061629 IPI
    ATP-dependent protein folding chaperone GO:0140662 IEA
Biological Process
    kidney development GO:0001822 IEP
    negative regulation of protein phosphorylation GO:0001933 IMP
    protein folding GO:0006457 IBA
    protein folding GO:0006457 IEA
    negative regulation of gene expression GO:0010629 IMP
    negative regulation of apoptotic process GO:0043066 IEP
    protein insertion into mitochondrial outer membrane GO:0045040 IEA
    protein insertion into mitochondrial outer membrane GO:0045040 ISO
    positive regulation of angiogenesis GO:0045766 IEP
    chaperone-mediated protein complex assembly GO:0051131 IEA
    chaperone-mediated protein complex assembly GO:0051131 ISO
    neuron apoptotic process GO:0051402 IMP
    regulation of microglial cell activation GO:1903978 IMP
Subcellular Localization
    nucleus GO:0005634 IBA
    cytoplasm GO:0005737 IEA
    mitochondrion GO:0005739 IEA
    lipid droplet GO:0005811 IDA
    cytosol GO:0005829 IBA
    cytosol GO:0005829 IEA
    cytosol GO:0005829 ISO
    extracellular exosome GO:0070062 IEA
    extracellular exosome GO:0070062 ISO
 Experiment description of studies that identified Hspa4 in sEVs
1
Experiment ID 93
MISEV standards
✔
EM
Biophysical techniques
✔
HSP70|GAPDH|CD9|CD151
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Western blotting
Mass spectrometry [MALDI TOF]
PubMed ID 20124479    
Organism Rattus norvegicus
Experiment description Cell surface tetraspanin Tspan8 contributes to molecular pathways of exosome-induced endothelial cell activation.
Authors "Nazarenko I, Rana S, Baumann A, McAlear J, Hellwig A, Trendelenburg M, Lochnit G, Preissner KT, Zoller M."
Journal name CR
Publication year 2010
Sample Pancreatic cancer cells
Sample name AS-Tspan8
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Flotation density 1.14-1.17 g/mL
Molecules identified in the study Protein
mRNA
Methods used in the study RT-PCR
Western blotting
2
Experiment ID 92
MISEV standards
✔
EM
Biophysical techniques
✔
HSP70|GAPDH|CD9|CD151
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Western blotting
PubMed ID 20124479    
Organism Rattus norvegicus
Experiment description Cell surface tetraspanin Tspan8 contributes to molecular pathways of exosome-induced endothelial cell activation.
Authors "Nazarenko I, Rana S, Baumann A, McAlear J, Hellwig A, Trendelenburg M, Lochnit G, Preissner KT, Zoller M."
Journal name CR
Publication year 2010
Sample Pancreatic cancer cells
Sample name AS
Isolation/purification methods Differential centrifugation
Sucrose density gradient
Flotation density 1.14-1.17 g/mL
Molecules identified in the study Protein
mRNA
Methods used in the study RT-PCR
Western blotting
RatRef-12 Microarray
FACS
Mass spectrometry [MALDI TOF]
3
Experiment ID 90
MISEV standards
✔
EM
Biophysical techniques
✔
HSC70|HSP90|TSG101|MHCI
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Mass spectrometry [Orbitrap]
Western blotting
PubMed ID 21828046    
Organism Rattus norvegicus
Experiment description The proteo-lipidic composition of exosomes changes during reticulocyte maturation.
Authors "Carayon K, Chaoui K, Ronzier E, Lazar I, Bertrand-Michel J, Roques V, Balor S, Terce F, Lopez A, Salome L, Joly E"
Journal name JBC
Publication year 2011
Sample Reticulocytes
Sample name Reticulocytes - D2 Rep 1
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.16-1.21 g/mL
Molecules identified in the study Protein
Lipids
Methods used in the study Mass spectrometry [QSTAR]
Mass spectrometry [Orbitrap]
Western blotting
4
Experiment ID 94
MISEV standards
✔
EM
Biophysical techniques
✔
TSG101|HSP90|HSC70|MHCI
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Mass spectrometry [Orbitrap]
Western blotting
PubMed ID 21828046    
Organism Rattus norvegicus
Experiment description The proteo-lipidic composition of exosomes changes during reticulocyte maturation.
Authors "Carayon K, Chaoui K, Ronzier E, Lazar I, Bertrand-Michel J, Roques V, Balor S, Terce F, Lopez A, Salome L, Joly E."
Journal name JBC
Publication year 2011
Sample Reticulocytes
Sample name Reticulocytes - D4 Rep 1
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.16-1.21 g/mL
Molecules identified in the study Protein
Lipids
Methods used in the study Mass spectrometry [QSTAR]
Mass spectrometry [Orbitrap]
Western blotting
5
Experiment ID 95
MISEV standards
✔
EM
Biophysical techniques
✔
TSG101|HSP90|HSC70|MHCI
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Mass spectrometry [Orbitrap]
Western blotting
PubMed ID 21828046    
Organism Rattus norvegicus
Experiment description The proteo-lipidic composition of exosomes changes during reticulocyte maturation.
Authors "Carayon K, Chaoui K, Ronzier E, Lazar I, Bertrand-Michel J, Roques V, Balor S, Terce F, Lopez A, Salome L, Joly E."
Journal name JBC
Publication year 2011
Sample Reticulocytes
Sample name Reticulocytes - D7 Rep 1
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.13-1.25 g/mL
Molecules identified in the study Protein
Lipids
Methods used in the study Mass spectrometry [QSTAR]
Mass spectrometry [Orbitrap]
Western blotting
6
Experiment ID 96
MISEV standards
✔
EM
Biophysical techniques
✔
TSG101|HSP90|HSC70|MHCI
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Mass spectrometry [Orbitrap]
PubMed ID 21828046    
Organism Rattus norvegicus
Experiment description The proteo-lipidic composition of exosomes changes during reticulocyte maturation.
Authors "Carayon K, Chaoui K, Ronzier E, Lazar I, Bertrand-Michel J, Roques V, Balor S, Terce F, Lopez A, Salome L, Joly E."
Journal name JBC
Publication year 2011
Sample Reticulocytes
Sample name Reticulocytes - D2 Rep 2
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.16-1.21 g/mL
Molecules identified in the study Protein
Lipids
Methods used in the study Mass spectrometry [QSTAR]
Mass spectrometry [Orbitrap]
Western blotting
7
Experiment ID 97
MISEV standards
✔
EM
Biophysical techniques
✔
TSG101|HSP90|HSC70|MHCI
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Mass spectrometry [Orbitrap]
PubMed ID 21828046    
Organism Rattus norvegicus
Experiment description The proteo-lipidic composition of exosomes changes during reticulocyte maturation.
Authors "Carayon K, Chaoui K, Ronzier E, Lazar I, Bertrand-Michel J, Roques V, Balor S, Terce F, Lopez A, Salome L, Joly E."
Journal name JBC
Publication year 2011
Sample Reticulocytes
Sample name Reticulocytes - D4 Rep 2
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.16-1.21 g/mL
Molecules identified in the study Protein
Lipids
Methods used in the study Mass spectrometry [QSTAR]
Mass spectrometry [Orbitrap]
Western blotting
8
Experiment ID 98
MISEV standards
✔
EM
Biophysical techniques
✔
TSG101|HSP90|HSC70|MHCI
Enriched markers
✘ Negative markers
✘ Particle analysis
Identified molecule protein
Identification method Mass spectrometry [Orbitrap]
PubMed ID 21828046    
Organism Rattus norvegicus
Experiment description The proteo-lipidic composition of exosomes changes during reticulocyte maturation.
Authors "Carayon K, Chaoui K, Ronzier E, Lazar I, Bertrand-Michel J, Roques V, Balor S, Terce F, Lopez A, Salome L, Joly E."
Journal name JBC
Publication year 2011
Sample Reticulocytes
Sample name Reticulocytes - D7 Rep 2
Isolation/purification methods Differential centrifugation
Ultracentrifugation
Sucrose density gradient
Flotation density 1.13-1.25 g/mL
Molecules identified in the study Protein
Lipids
Methods used in the study Mass spectrometry [QSTAR]
Mass spectrometry [Orbitrap]
Western blotting
 Protein-protein interactions for Hspa4
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 Cyp27a1  
Reconstituted Complex Rattus norvegicus
2 Braf  
Affinity Capture-Western Rattus norvegicus
3 Bag1  
Affinity Capture-Western Rattus norvegicus
4 Cyp1a1  
Reconstituted Complex Rattus norvegicus
5 Arfgap1  
Affinity Capture-MS Rattus norvegicus
6 Snca  
Affinity Capture-MS Rattus norvegicus
7 Pex5  
Reconstituted Complex Rattus norvegicus
8 Nr3c1  
Reconstituted Complex Rattus norvegicus
9 Rad23b  
Affinity Capture-MS Rattus norvegicus
10 Itm2b 290364
Affinity Capture-MS Rattus norvegicus
11 Cyp2b1  
Reconstituted Complex Rattus norvegicus
12 Tp53  
Affinity Capture-Western Rattus norvegicus
13 Sumo3  
Affinity Capture-MS Rattus norvegicus
14 STXBP5L  
Affinity Capture-MS Homo sapiens
15 Cyp2e1  
Reconstituted Complex Rattus norvegicus
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