Gene description for DDX4
Gene name DEAD (Asp-Glu-Ala-Asp) box polypeptide 4
Gene symbol DDX4
Other names/aliases VASA
Species Homo sapiens
 Database cross references - DDX4
ExoCarta ExoCarta_54514
Vesiclepedia VP_54514
Entrez Gene 54514
HGNC 18700
MIM 605281
UniProt Q9NQI0  
 DDX4 identified in sEVs derived from the following tissue/cell type
Ovarian cancer cells 23333927    
Ovarian cancer cells 23333927    
Thymus 23844026    
 Gene ontology annotations for DDX4
Molecular Function
    DNA clamp loader activity GO:0003689 IEA
    RNA helicase activity GO:0003724 IBA
    mRNA binding GO:0003729 IBA
    ATP binding GO:0005524 IEA
    ATP hydrolysis activity GO:0016887 ISS
    cohesin loader activity GO:0061775 IEA
    chromatin extrusion motor activity GO:0140584 IEA
    ATP-dependent H3-H4 histone complex chaperone activity GO:0140665 IEA
    molecular condensate scaffold activity GO:0140693 EXP
    ATP-dependent H2AZ histone chaperone activity GO:0140849 IEA
Biological Process
    male meiotic nuclear division GO:0007140 ISS
    male meiosis I GO:0007141 ISS
    gamete generation GO:0007276 IBA
    germ cell development GO:0007281 IBA
    spermatogenesis GO:0007283 ISS
    cell differentiation GO:0030154 IBA
    flagellated sperm motility GO:0030317 IMP
    piRNA processing GO:0034587 ISS
    chromatin looping GO:0140588 IEA
    transposable element silencing by piRNA-mediated heterochromatin formation GO:0141006 ISS
    transposable element silencing by piRNA-mediated DNA methylation GO:0141196 ISS
Subcellular Localization
    nucleus GO:0005634 IBA
    cytoplasm GO:0005737 IDA
    P granule GO:0043186 IBA
    perinuclear region of cytoplasm GO:0048471 IEA
    pi-body GO:0071546 ISS
    piP-body GO:0071547 ISS
 Experiment description of studies that identified DDX4 in sEVs
1
Experiment ID 211
MISEV standards
EM
Biophysical techniques
TSG101|Alix|EpCAM|TFRC
Enriched markers
cytochrome c|GOLGA2
Negative markers
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
MISEV standards
CEM
Biophysical techniques
TSG101|Alix|EpCAM|TFRC
Enriched markers
Cytochrome C|GOLGA2
Negative markers
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 217
MISEV standards
EM
Biophysical techniques
TSG101|CD81|CD9|CD63
Enriched markers
Negative markers
NTA
Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 23844026    
Organism Homo sapiens
Experiment description Characterization of human thymic exosomes.
Authors "Skogberg G, Gudmundsdottir J, van der Post S, Sandstrom K, Bruhn S, Benson M, Mincheva-Nilsson L, Baranov V, Telemo E, Ekwall O."
Journal name PLoS One
Publication year 2013
Sample Thymus
Sample name Normal-Thymus
Isolation/purification methods Differential centrifugation
Filtration
Ultracentrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
 Protein-protein interactions for DDX4
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 CHMP4C 92421
Affinity Capture-MS Homo sapiens
2 SMAD3 4088
Affinity Capture-MS Homo sapiens
3 SRC 6714
Affinity Capture-MS Homo sapiens
4 MIB1 57534
Proximity Label-MS Homo sapiens
5 PLEKHA4 57664
Affinity Capture-MS Homo sapiens
6 SPSB1  
Protein-peptide Homo sapiens
7 MARCH5  
Proximity Label-MS Homo sapiens
8 CUL3 8452
Affinity Capture-MS Homo sapiens
9 DCUN1D1 54165
Affinity Capture-MS Homo sapiens
10 MYCN  
Affinity Capture-MS Homo sapiens
11 KIF20A 10112
Affinity Capture-MS Homo sapiens
12 SPSB4  
Protein-peptide Homo sapiens
13 CAND1 55832
Affinity Capture-MS Homo sapiens
14 KIF14 9928
Affinity Capture-MS Homo sapiens
15 SPSB2  
Protein-peptide Homo sapiens
16 USP7 7874
Affinity Capture-MS Homo sapiens
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