Gene description for DEFA1
Gene name defensin, alpha 1
Gene symbol DEFA1
Other names/aliases DEF1
DEFA2
HNP-1
HP-1
HP1
MRS
Species Homo sapiens
 Database cross references - DEFA1
ExoCarta ExoCarta_1667
Vesiclepedia VP_1667
Entrez Gene 1667
HGNC 2761
MIM 125220
UniProt P59665  
 DEFA1 identified in exosomes derived from the following tissue/cell type
Mesenchymal stem cells Unpublished / Not applicable
Saliva 19199708    
Urine 15326289    
Urine 22418980    
Urine 22418980    
 Gene ontology annotations for DEFA1
Molecular Function
    protein binding GO:0005515 IPI
    pore-forming activity GO:0140911 IDA
Biological Process
    innate immune response in mucosa GO:0002227 IBA
    innate immune response in mucosa GO:0002227 IDA
    chemotaxis GO:0006935 TAS
    immune response GO:0006955 TAS
    T cell chemotaxis GO:0010818 IDA
    antibacterial humoral response GO:0019731 IBA
    antibacterial humoral response GO:0019731 IDA
    estrogen receptor signaling pathway GO:0030520 IDA
    killing of cells of another organism GO:0031640 IDA
    defense response to protozoan GO:0042832 IMP
    defense response to Gram-negative bacterium GO:0050829 IBA
    defense response to Gram-positive bacterium GO:0050830 IBA
    defense response to Gram-positive bacterium GO:0050830 IDA
    defense response to fungus GO:0050832 IEA
    defense response to virus GO:0051607 IEA
    disruption of plasma membrane integrity in another organism GO:0051673 IBA
    killing by host of symbiont cells GO:0051873 IDA
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IBA
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IC
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IDA
    antimicrobial humoral immune response mediated by antimicrobial peptide GO:0061844 IMP
    cellular response to lipopolysaccharide GO:0071222 IBA
Subcellular Localization
    extracellular region GO:0005576 TAS
    extracellular space GO:0005615 HDA
    extracellular space GO:0005615 IBA
    extracellular space GO:0005615 IDA
    Golgi lumen GO:0005796 TAS
    azurophil granule lumen GO:0035578 TAS
    collagen-containing extracellular matrix GO:0062023 HDA
    collagen-containing extracellular matrix GO:0062023 HDA
    extracellular exosome GO:0070062 HDA
 Experiment description of studies that identified DEFA1 in exosomes
1
Experiment ID 126
MISEV standards
Biophysical techniques
GAPDH
Enriched markers
Negative markers
Particle analysis
Identified molecule protein
Identification method Mass spectrometry [LTQ-FT Ultra]
PubMed ID Unpublished / Not applicable
Organism Homo sapiens
Experiment description Mesenchymal Stem Cell Exosomes: The Future MSC-based Therapy?
Authors "Ruenn Chai Lai, Ronne Wee Yeh Yeo, Soon Sim Tan, Bin Zhang, Yijun Yin, Newman Siu Kwan Sze, Andre Choo, and Sai Kiang Lim"
Journal name Mesenchymal Stem Cell Therapy
Publication year 2011
Sample Mesenchymal stem cells
Sample name huES9.E1
Isolation/purification methods HPLC
Flotation density -
Molecules identified in the study Protein
Methods used in the study Western blotting
Antobody array
Mass spectrometry
2
Experiment ID 66
MISEV standards
IEM
Biophysical techniques
TSG101|Alix|CD63|CD81
Enriched markers
Negative markers
Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 19199708    
Organism Homo sapiens
Experiment description Proteomic analysis of human parotid gland exosomes by multidimensional protein identification technology (MudPIT).
Authors "Gonzalez-Begne M, Lu B, Han X, Hagen FK, Hand AR, Melvin JE, Yates JR"
Journal name JPR
Publication year 2009
Sample Saliva
Sample name Saliva
Isolation/purification methods Differential centrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [LTQ]
Western blotting
Immunoelectron Microscopy
3
Experiment ID 13
MISEV standards
IEM
Biophysical techniques
Alix|RAB4|RAB5B|RAB11|TSG101|CD9|AQP2|AQP1
Enriched markers
Negative markers
Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 15326289    
Organism Homo sapiens
Experiment description Identification and proteomic profiling of exosomes in human urine.
Authors "Pisitkun T, Shen RF, Knepper MA"
Journal name PNAS
Publication year 2004
Sample Urine
Sample name Urine - Normal
Isolation/purification methods Ultracentrifugation
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry [LCQ DECA XP]
Western blotting
4
Experiment ID 196
MISEV standards
EM
Biophysical techniques
Alix|TSG101|HSP70|CD9
Enriched markers
Negative markers
Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 22418980    
Organism Homo sapiens
Experiment description A multiplex quantitative proteomics strategy for protein biomarker studies in urinary exosomes.
Authors "Raj DA, Fiume I, Capasso G, Pocsfalvi G."
Journal name Kidney Int
Publication year 2012
Sample Urine
Sample name Urine - Normal high density
Isolation/purification methods Differential centrifugation
Sucrose cushion
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
5
Experiment ID 197
MISEV standards
EM
Biophysical techniques
Alix|TSG101|HSP70|CD9
Enriched markers
Negative markers
Particle analysis
Identified molecule protein
Identification method Mass spectrometry
PubMed ID 22418980    
Organism Homo sapiens
Experiment description A multiplex quantitative proteomics strategy for protein biomarker studies in urinary exosomes.
Authors "Raj DA, Fiume I, Capasso G, Pocsfalvi G."
Journal name Kidney Int
Publication year 2012
Sample Urine
Sample name Urine - Normal low density
Isolation/purification methods Differential centrifugation
Sucrose cushion
Flotation density -
Molecules identified in the study Protein
Methods used in the study Mass spectrometry
 Protein-protein interactions for DEFA1
  Protein Interactor ExoCarta ID Identification method PubMed Species
1 COL6A1 1291
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
2 SLIT2 9353
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
3 PPP3CA 5530
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
4 NOTCH3 4854
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
5 CACNA2D1 781
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
6 CNTNAP3  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
7 CACNA2D2 9254
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
8 ARSB 411
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
9 TMEM67 91147
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
10 DEFA1B 728358
Affinity Capture-MS Homo sapiens
11 NPC2 10577
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
12 CHST10  
Affinity Capture-MS Homo sapiens
13 ITGA7 3679
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
14 SULF2 55959
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
15 TGFB1 7040
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
16 CTBS 1486
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
17 PPP3CB  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
18 CPD 1362
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
19 ERAP1 51752
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
20 SMOC1 64093
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
21 SCARB1 949
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
22 ENPP1 5167
Affinity Capture-MS Homo sapiens
23 NID2 22795
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
24 PLXNA2 5362
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
25 PPP3R1 5534
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
26 TMEM2 23670
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
27 GSK3B 2932
Two-hybrid Homo sapiens
28 NXPH4  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
29 MICA 100507436
Affinity Capture-MS Homo sapiens
30 MOXD1 26002
Affinity Capture-MS Homo sapiens
31 FBLN1 2192
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
32 HS6ST1  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
33 PRADC1  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
34 MANBA 4126
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
35 MAN2A2 4122
Affinity Capture-MS Homo sapiens
36 BCHE 590
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
37 WNT5A 7474
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
38 TGFBR3 7049
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
39 GALNS 2588
Affinity Capture-MS Homo sapiens
40 TMEM131  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
41 LIFR 3977
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
42 FSTL1 11167
Affinity Capture-MS Homo sapiens
43 COL14A1 7373
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
44 CACHD1  
Affinity Capture-MS Homo sapiens
45 ADAM17 6868
Affinity Capture-MS Homo sapiens
46 PLAT 5327
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
47 SUSD1 64420
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
48 UBQLN2 29978
Two-hybrid Homo sapiens
49 EEF2 1938
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
50 TJP1 7082
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
51 LRFN3  
Affinity Capture-MS Homo sapiens
52 LOXL2 4017
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
53 EGFR 1956
Affinity Capture-MS Homo sapiens
54 CNPY3 10695
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
55 NRP2 8828
Affinity Capture-MS Homo sapiens
56 NPTX1  
Affinity Capture-MS Homo sapiens
57 CHRNA5  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
58 TMEM132A 54972
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
59 LAMA3 3909
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
60 MCMBP 79892
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
61 IGSF3 3321
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
62 COCH 1690
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
63 LGMN 5641
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
64 PXDN 7837
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
65 Dynll1 56455
Affinity Capture-MS Mus musculus
66 CTSF 8722
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
67 TKFC 26007
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
68 BMP1 649
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
69 RBBP8  
Affinity Capture-MS Homo sapiens
70 TTC13  
Affinity Capture-MS Homo sapiens
71 LAMB1 3912
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
72 PLXNB2 23654
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
73 GRN 2896
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
74 TTC17 55761
Affinity Capture-MS Homo sapiens
75 CTSV 1515
Affinity Capture-MS Homo sapiens
76 PLXNA1 5361
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
77 COL18A1 80781
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
78 LRP12 29967
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
79 EDEM3 80267
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
80 ITGAV 3685
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
81 ST3GAL4 6484
Affinity Capture-MS Homo sapiens
82 IGFBP2 3485
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
83 LAMB2 3913
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
84 LAMA5 3911
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
85 LDLR 3949
Affinity Capture-MS Homo sapiens
86 ABHD17B 51104
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
87 MYC  
Affinity Capture-MS Homo sapiens
88 ARSK  
Affinity Capture-MS Homo sapiens
89 CILP2  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
90 TIMP3 7078
Affinity Capture-MS Homo sapiens
91 LRIG1 26018
Affinity Capture-MS Homo sapiens
92 PPP3CC 5533
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
93 UBE3D  
Affinity Capture-MS Homo sapiens
Affinity Capture-MS Homo sapiens
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